day1/Session-3.tex
author Santosh G. Vattam <vattam.santosh@gmail.com>
Mon, 05 Oct 2009 17:52:05 +0530
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% Tutorial slides on Python.
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%
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% Author: Prabhu Ramachandran <prabhu at aero.iitb.ac.in>
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% Copyright (c) 2005-2008, Prabhu Ramachandran
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%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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\documentclass[14pt,compress]{beamer}
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%\documentclass[draft]{beamer}
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%\documentclass[compress,handout]{beamer}
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%\usepackage{pgfpages} 
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%\pgfpagesuselayout{2 on 1}[a4paper,border shrink=5mm]
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% Modified from: generic-ornate-15min-45min.de.tex
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\mode<presentation>
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{
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  \usetheme{Warsaw}
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  \useoutertheme{split}
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  \setbeamercovered{transparent}
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}
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\usepackage[english]{babel}
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\usepackage[latin1]{inputenc}
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%\usepackage{times}
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\usepackage[T1]{fontenc}
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% Taken from Fernando's slides.
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\usepackage{ae,aecompl}
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\usepackage{mathpazo,courier,euler}
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\usepackage[scaled=.95]{helvet}
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\definecolor{darkgreen}{rgb}{0,0.5,0}
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\usepackage{listings}
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\lstset{language=Python,
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    basicstyle=\ttfamily,
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    commentstyle=\color{red}\itshape,
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  stringstyle=\color{darkgreen},
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  showstringspaces=false,
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  keywordstyle=\color{blue}\bfseries}
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%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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% Macros
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\setbeamercolor{emphbar}{bg=blue!20, fg=black}
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\newcommand{\emphbar}[1]
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{\begin{beamercolorbox}[rounded=true]{emphbar} 
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      {#1}
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 \end{beamercolorbox}
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}
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\newcounter{time}
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\setcounter{time}{0}
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\newcommand{\inctime}[1]{\addtocounter{time}{#1}{\tiny \thetime\ m}}
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\newcommand{\typ}[1]{\texttt{#1}}
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\newcommand{\kwrd}[1]{ \texttt{\textbf{\color{blue}{#1}}}  }
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%%% This is from Fernando's setup.
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% \usepackage{color}
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% \definecolor{orange}{cmyk}{0,0.4,0.8,0.2}
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% % Use and configure listings package for nicely formatted code
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% \usepackage{listings}
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% \lstset{
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%    language=Python,
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%    basicstyle=\small\ttfamily,
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%    commentstyle=\ttfamily\color{blue},
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%    stringstyle=\ttfamily\color{orange},
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%    showstringspaces=false,
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%    breaklines=true,
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%    postbreak = \space\dots
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% }
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%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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% Title page
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\title[Basic Python]{Python:\\A great programming toolkit}
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\author[Asokan \& Prabhu] {Asokan Pichai\\Prabhu Ramachandran}
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\institute[IIT Bombay] {Department of Aerospace Engineering\\IIT Bombay}
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\date[] {25, July 2009}
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%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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%\pgfdeclareimage[height=0.75cm]{iitmlogo}{iitmlogo}
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%\logo{\pgfuseimage{iitmlogo}}
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%% Delete this, if you do not want the table of contents to pop up at
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%% the beginning of each subsection:
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\AtBeginSubsection[]
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{
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  \begin{frame}<beamer>
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    \frametitle{Outline}
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    \tableofcontents[currentsection,currentsubsection]
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  \end{frame}
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}
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% If you wish to uncover everything in a step-wise fashion, uncomment
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% the following command: 
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%\beamerdefaultoverlayspecification{<+->}
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%\includeonlyframes{current,current1,current2,current3,current4,current5,current6}
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%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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% DOCUMENT STARTS
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\begin{document}
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\begin{frame}
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  \titlepage
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\end{frame}
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\begin{frame}
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  {Acknowledgements}
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  \begin{center}
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  This program is conducted by\\
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  IIT, Bombay\\
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  through CDEEP\\as part of  the open source initiatives\\
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  under the aegis of\\
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  \alert{National Mission on Education through ICT,} \\
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  Ministry of HRD.
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  \end{center}
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\end{frame}
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\begin{frame}
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  \frametitle{Outline}
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  \tableofcontents
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  % You might wish to add the option [pausesections]
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\end{frame}
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%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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% TODO
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%
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%  * Add slide on Python packages (modules)
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%  * Add slides on reference counting.
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\section{Agenda}
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\begin{frame}{About the Workshop}
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  \begin{description}
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	\item[Session 1] Sat 14:00--15:55
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	\item[Session 2] Sat 16:05--18:00
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	\item[Session 3] Sun 14:00--15:55
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	\item[Session 4] Sun 16:05--18:00 
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  \end{description}
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  \begin{block}{Goal of the workshop}
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	At the end of this program, successful participants will be able to use python as their scripting and problem solving language. Aimed at Engg. students--focus on basic numerics and plotting-- but should serve a similar purpose for others. 
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  \end{block}
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\end{frame}
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\begin{frame}{Checklist}
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  Let us verify that all of us are having the same (similar) tools and environment
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  \begin{description}
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	\item[python] Type python at the command line. Do you see version 2.5 or later?
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	\item[IPython] Is IPython available?
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	\item[Editor] Which editor? scite, vim, emacs, \ldots
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  \end{description}
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\end{frame}
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\section{Overview}
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\begin{frame}{Session 1}
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  \begin{itemize}
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	\item Introduction and motivation
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	\item Using the interpreter(s)
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	\item Basic data types: int, float, string
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	\item Basic data structures: list
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	\item Basic console IO: \texttt{raw\_input(), print}
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    \item Basic control flow: \texttt{if, while}
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	\item Problem set 1
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    \item Functions $\rightarrow$ Problem set 2
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    \item lists, \texttt{for}  $\rightarrow$ Problem set 3
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    \item IO, Modules $\rightarrow$ Problem sets 4,5, \ldots
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  \end{itemize}
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\end{frame}
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\begin{frame}
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  \frametitle{Introduction}
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  \begin{itemize}
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  \item Creator and BDFL: Guido van Rossum
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  \item Conceived in December 1989
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  \item ``Python'' as in Monty Python's Flying Circus
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  \item Current stable version of Python is 2.6.x
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  \item PSF license (like BSD: no strings attached)
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  \item Highly cross platform
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  \item Runs on the Nokia series 60!
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  \item \alert{Philosophy:} Simple and complete by design
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  \end{itemize}
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\end{frame}
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\begin{frame}
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  \frametitle{Resources}
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  \begin{itemize}
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  \item Part of many GNU/Linux distributions
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  \item Web: \url{http://www.python.org}
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  \item Doc: \url{http://www.python.org/doc}
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  \item Free Tutorials:
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    \begin{itemize}
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    \item Official Python tutorial: \url{http://docs.python.org/tut/tut.html}
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    \item Byte of Python: \url{http://www.byteofpython.info/}
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    \item Dive into Python: \url{http://diveintopython.org/}
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    \end{itemize}
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  \end{itemize}
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\end{frame}
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\begin{frame}
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  \frametitle{Why Python?}
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  \begin{itemize}
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  \item Designed to be readable and easy to use
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  \item High level, interpreted, modular, OO
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  \item Much faster development cycle
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  \item Powerful interactive environment
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  \item Rapid application development
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  \item Rich standard library and modules
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  \item Interfaces well with C++, C and FORTRAN
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  \item \alert{More than a math package $\Rightarrow$ some extra work compared to math packages}
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  \end{itemize}
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\end{frame}
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\begin{frame}
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  \frametitle{Use cases}
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  \begin{itemize}
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  \item NASA: Space Shuttle Mission Design
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  \item AstraZeneca: Collaborative Drug Discovery
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  \item ForecastWatch.com: Helps Meteorologists
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  \item Industrial Light \& Magic: Runs on Python
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  \item Zope: Commercial grade Toolkit
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  \item Plone: Professional high feature CMS
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  \item RedHat: install scripts, sys-admin tools
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  \item Django: A great web application framework
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  \item Google: A strong python shop
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  \end{itemize}
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\end{frame}
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\begin{frame}
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  \frametitle{To sum up, python is\ldots}
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  \begin{itemize}
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  \item dynamically typed, interpreted $\rightarrow$ rapid testing/prototyping
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  \item powerful, very high level
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  \item has full introspection 
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  \item Did we mention powerful?
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  \end{itemize}
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  \begin{block}{But \ldots}
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    may be wanting in performance. specialised resources such as SWIG, \alert{Cython} are available 
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  \end{block}
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  \inctime{15}
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\end{frame}
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%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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% TIME: 15 m, running 15m
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%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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\section{Python}
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\subsection{Getting Started}
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\begin{frame}[fragile]{At the prompt, type the following}
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   \begin{lstlisting}
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>>> print 'Hello Python' 
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>>> print 3124 * 126789
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>>> 1786 % 12
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>>> 3124 * 126789
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>>> a = 3124 * 126789
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>>> big = 12345678901234567890 ** 3
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>>> verybig = big * big * big * big 
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>>> 12345**6, 12345**67, 12345**678
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  \end{lstlisting}
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\end{frame}
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\begin{frame}[fragile]{At the prompt, type the following}
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   \begin{lstlisting}
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>>> s = 'Hello '
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>>> p = 'World'
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>>> s + p 
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>>> s * 12 
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>>> s * s
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>>> s + p * 12, (s + p)* 12
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>>> s * 12 + p * 12
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>>> 12 * s 
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    \end{lstlisting}
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\end{frame}
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\begin{frame}[fragile]{At the prompt, type the following}
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  \begin{lstlisting}
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>>> 17/2
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>>> 17/2.0
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>>> 17.0/2
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>>> 17.0/8.5
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>>> int(17/2.0)
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>>> float(17/2)
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>>> str(17/2.0)
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>>> round( 7.5 )
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  \end{lstlisting}
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  \begin{block}{Mini exercise}
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	Round a float to the nearest integer, using \texttt{int()}?
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  \end{block}
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\end{frame}
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\begin{frame}{Midi exercises}
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  \begin{center}
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    \begin{itemize}
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      \item What does this do?
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      \item \texttt{round(amount * 10) /10.0 }
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    \end{itemize}
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  \end{center}
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\end{frame}
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\begin{frame}{More exercises?}
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  \begin{center}
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    \begin{block}{Round sums}
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      How to round a number to the nearest  5 paise?\\
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      \begin{description}
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        \item[Remember] 17.23 $\rightarrow$ 17.25,\\ while 17.22 $\rightarrow$ 17.20\\
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      \end{description}
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      How to round a number to the nearest 20 paise?
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    \end{block}
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  \end{center}
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\end{frame}
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\begin{frame}[fragile] {A question of good style}
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  \begin{lstlisting}
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    amount = 12.68
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    denom = 0.05
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    nCoins = round(amount/denom)
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    rAmount = nCoins * denom
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  \end{lstlisting}
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  \pause
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  \begin{block}{Style Rule \#1}
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    Naming is 80\% of programming
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  \end{block}
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\end{frame}
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\begin{frame}[fragile]
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  \frametitle{Odds and ends}
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  \begin{itemize}
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    \item Case sensitive
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    \item Dynamically typed $\Rightarrow$ need not specify a type
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      \begin{lstlisting}
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a = 1
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a = 1.1
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a = "Now I am a string!"
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      \end{lstlisting}
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    \item Comments:
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      \begin{lstlisting}
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a = 1  # In-line comments
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# Comment in a line to itself.
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a = "# This is not a comment!"
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      \end{lstlisting}
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  \end{itemize}
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  \inctime{15}
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\end{frame}
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%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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% TIME: 15 m, running 30m
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%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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\subsection{Data types}
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\begin{frame}
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  \frametitle{Basic types}
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  \begin{itemize}
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    \item numbers: float, int, long, complex
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    \item strings
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    \item boolean
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  \end{itemize}
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  \begin{block}{Also to be discussed later}
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diff changeset
   365
    tuples, lists, dictionaries, functions, objects\ldots
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   366
  \end{block}
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Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   367
\end{frame}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   368
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   369
\begin{frame}[fragile]
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   370
  \frametitle{Numbers}
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Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   371
  \vspace*{-0.25in}
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Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   372
  \begin{lstlisting}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   373
>>> a = 1 # Int.
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   374
>>> l = 1000000L # Long
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   375
>>> e = 1.01325e5 # float
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   376
>>> f = 3.14159 # float
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   377
>>> c = 1+1j # Complex!
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   378
>>> print f*c/a
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   379
(3.14159+3.14159j)
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   380
>>> print c.real, c.imag
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   381
1.0 1.0
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   382
>>> abs(c)
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   383
1.4142135623730951
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   384
>>> abs( 8 - 9.5 )
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   385
1.5
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   386
  \end{lstlisting}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   387
\end{frame}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   388
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   389
\begin{frame}[fragile]
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   390
  \frametitle{Boolean}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   391
  \begin{lstlisting}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   392
>>> t = True
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   393
>>> f = not t
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   394
False
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   395
>>> f or t
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   396
True
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   397
>>> f and t
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   398
False
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   399
  \end{lstlisting}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   400
  \begin{block}{Try:}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   401
  NOT True\\
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   402
  not TRUE
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   403
  \end{block}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   404
\end{frame}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   405
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   406
\begin{frame}[fragile]
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   407
  \frametitle{Relational and logical operators}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   408
  \begin{lstlisting}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   409
>>> a, b, c = -1, 0, 1
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   410
>>> a == b
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   411
False
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   412
>>> a <= b 
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   413
True
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   414
>>> a + b != c
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   415
True
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   416
>>> a < b < c
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   417
True
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   418
>>> c >= a + b
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   419
True
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   420
  \end{lstlisting}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   421
\end{frame}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   422
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   423
\begin{frame}[fragile]
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   424
  \frametitle{Strings}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   425
  \begin{lstlisting}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   426
s = 'this is a string'
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   427
s = 'This one has "quotes" inside!'
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   428
s = "I have 'single-quotes' inside!"
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   429
l = "A string spanning many lines\
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   430
one more line\
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   431
yet another"
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   432
t = """A triple quoted string does
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   433
not need to be escaped at the end and 
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   434
"can have nested quotes" etc."""
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   435
  \end{lstlisting}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   436
\end{frame}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   437
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   438
\begin{frame}[fragile]
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   439
  \frametitle{More Strings}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   440
  \vspace*{-0.2in}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   441
  \begin{lstlisting}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   442
>>> w = "hello"    
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   443
>>> print w[0] + w[2] + w[-1]
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   444
hlo
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   445
>>> len(w) # guess what
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   446
5
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   447
>>> s = u'Unicode strings!'
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   448
>>> # Raw strings (note the leading 'r')
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   449
... r_s = r'A string $\alpha \nu$'
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   450
  \end{lstlisting}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   451
\pause
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   452
  \begin{lstlisting}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   453
>>> w[0] = 'H' # Can't do that!
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   454
Traceback (most recent call last):
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   455
  File "<stdin>", line 1, in ?
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   456
TypeError: object does not support item assignment
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   457
  \end{lstlisting}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   458
\end{frame}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   459
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   460
\begin{frame}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   461
  \frametitle{Let us switch to IPython}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   462
  Why?
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   463
  \begin{block}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   464
    {Better help (and a lot more)}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   465
    Tab completion\\
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   466
    ?\\
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   467
    .?\\
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   468
    object.function?
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   469
  \end{block}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   470
\end{frame}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   471
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   472
\begin{frame}[fragile]
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   473
  \frametitle{More on strings}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   474
  \begin{lstlisting}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   475
In [1]: a = 'hello world'
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   476
In [2]: a.startswith('hell')
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   477
Out[2]: True
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   478
In [3]: a.endswith('ld')
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   479
Out[3]: True
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   480
In [4]: a.upper()
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   481
Out[4]: 'HELLO WORLD'
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   482
In [5]: a.upper().lower()
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   483
Out[5]: 'hello world'
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   484
  \end{lstlisting}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   485
\end{frame}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   486
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   487
\begin{frame}[fragile]{Still with strings}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   488
  \begin{lstlisting}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   489
In [6]: a.split()
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   490
Out[6]: ['hello', 'world']
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   491
In [7]: ''.join(['a', 'b', 'c'])
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   492
Out[7]: 'abc'
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   493
In [8] 'd' in ''.join( 'a', 'b', 'c')
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   494
Out[8]: False
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   495
  \end{lstlisting}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   496
  \begin{block}{Try:}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   497
    \texttt{a.split( 'o' )}\\
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   498
    \texttt{'x'.join( a.split( 'o' ) )}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   499
  \end{block}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   500
\end{frame}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   501
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   502
\begin{frame}[fragile]{Surprise! strings!!}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   503
  \begin{lstlisting}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   504
In [11]: x, y = 1, 1.2
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   505
In [12]: 'x is %s, y is %s' %(x, y)
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   506
Out[12]: 'x is 1, y is 1.234'
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   507
  \end{lstlisting}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   508
  \begin{block}{Try:}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   509
    \texttt{'x is \%d, y is \%f' \%(x, y) }\\
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   510
    \texttt{'x is \%3d, y is \%4.2f' \%(x, y) }
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   511
  \end{block}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   512
  \small
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   513
\url{docs.python.org/lib/typesseq-strings.html}\\
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   514
\end{frame}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   515
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   516
\begin{frame}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   517
  {Interlude}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   518
  \begin{block}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   519
    {A classic problem}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   520
    How to interchange values of two variables? Please note that the type of either variable is unknown and it is not necessary that both be of the same type even!
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   521
  \end{block}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   522
  \inctime{30}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   523
\end{frame}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   524
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   525
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   526
% TIME: 25 m+ Interlude break 5 mins, running 60m 
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   527
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   528
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   529
\subsection{Control flow}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   530
\begin{frame}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   531
  \frametitle{Control flow constructs}  
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   532
  \begin{itemize}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   533
  \item \kwrd{if/elif/else}: branching
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   534
  \item \kwrd{while}: looping
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   535
  \item \kwrd{for}: iterating 
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   536
  \item \kwrd{break, continue}: modify loop 
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   537
  \item \kwrd{pass}: syntactic filler
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   538
  \end{itemize}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   539
\end{frame}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   540
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   541
\begin{frame}[fragile]
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   542
  \frametitle{Basic conditional flow}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   543
  \begin{lstlisting}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   544
In [21]: a = 7
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   545
In [22]: b = 8
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   546
In [23]: if a > b:
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   547
   ....:    print 'Hello'
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   548
   ....: else:
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   549
   ....:     print 'World'
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   550
   ....:
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   551
   ....:
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   552
World
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   553
  \end{lstlisting}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   554
  Let us switch to creating a file
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   555
\end{frame}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   556
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   557
\begin{frame}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   558
  {Creating python files}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   559
  \begin{itemize}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   560
    \item aka scripts
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   561
    \item use your editor
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   562
    \item Note that white space is the way to specify blocks!
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   563
    \item extension \typ{.py}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   564
    \item run with \texttt{python hello.py} at the command line
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   565
    \item in IPython\ldots
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   566
  \end{itemize}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   567
\end{frame}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   568
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   569
\begin{frame}[fragile]
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   570
  \frametitle{\typ{If...elif...else} example}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   571
\begin{lstlisting}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   572
x = int(raw_input("Enter an integer:"))
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   573
if x < 0:
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   574
     print 'Be positive!'
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   575
elif x == 0:
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   576
     print 'Zero'
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   577
elif x == 1:
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   578
     print 'Single'
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   579
else:
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   580
     print 'More'
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   581
\end{lstlisting}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   582
\end{frame}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   583
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   584
\begin{frame}{Simple IO}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   585
  \begin{block}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   586
    {Console Input}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   587
    \texttt{raw\_input(}) waits for user input.\\Prompt string is optional.\\
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   588
    All keystrokes are Strings!\\\texttt{int()} converts string to int.
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   589
  \end{block}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   590
  \begin{block}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   591
    {Console output}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   592
    \texttt{print} is straight forward. Major point to remember is the distinction between \texttt{print x} and \texttt{print x,}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   593
  \end{block}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   594
\end{frame}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   595
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   596
\begin{frame}[fragile]
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   597
  \frametitle{Basic looping}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   598
  \begin{lstlisting}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   599
# Fibonacci series:
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   600
# the sum of two elements
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   601
# defines the next
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   602
a, b = 0, 1
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   603
while b < 10:
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   604
    print b,
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   605
    a, b = b, a + b
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   606
 
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   607
\end{lstlisting}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   608
\typ{1 1 2 3 5 8}\\  
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   609
\alert{Recall it is easy to write infinite loops with \kwrd{while}}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   610
  \inctime{20}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   611
\end{frame}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   612
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   613
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   614
% TIME: 20 m, running 80m 
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   615
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   616
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   617
\begin{frame}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   618
  \frametitle{Problem set 1}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   619
  \begin{itemize}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   620
    \item All the problems can be\\
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   621
      solved using \kwrd{if} and \kwrd{while} 
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   622
  \end{itemize}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   623
\end{frame}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   624
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   625
\begin{frame}{Problem 1.1}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   626
  Write a program that displays all three digit numbers that are equal to the sum of the cubes of their digits. That is, print numbers $abc$ that have the property $abc = a^3 + b^3 + c^3$\\
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   627
These are called $Armstrong$ numbers.
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   628
\end{frame}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   629
  
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   630
\begin{frame}{Problem 1.2 - Collatz sequence}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   631
\begin{enumerate}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   632
  \item Start with an arbitrary (positive) integer. 
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   633
  \item If the number is even, divide by 2; if the number is odd multiply by 3 and add 1.
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   634
  \item Repeat the procedure with the new number.
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   635
  \item It appears that for all starting values there is a cycle of 4, 2, 1 at which the procedure loops.
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   636
\end{enumerate}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   637
    Write a program that accepts the starting value and prints out the Collatz sequence.
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   638
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   639
\end{frame}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   640
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   641
\begin{frame}{Problem 1.3 - Kaprekar's constant}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   642
  \begin{enumerate}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   643
    \item Take a four digit number--with at least two digits different.
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   644
    \item Arrange the digits in ascending and descending order, giving A and D respectively.
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   645
    \item Leave leading zeros in A!
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   646
    \item Subtract A from D.
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   647
    \item With the result, repeat from step 2.
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   648
  \end{enumerate}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   649
  Write a program to accept a 4-digit number and display the progression to Kaprekar's constant.
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   650
\end{frame}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   651
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   652
\begin{frame}[fragile]{Problem 1.4}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   653
  Write a program that prints the following pyramid on the screen. 
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   654
  \begin{lstlisting}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   655
1
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   656
2  2
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   657
3  3  3
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   658
4  4  4  4
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   659
  \end{lstlisting}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   660
The number of lines must be obtained from the user as input.\\
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   661
\pause
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   662
When can your code fail?
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   663
\only<2->{\inctime{25}}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   664
\end{frame}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   665
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   666
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   667
% TIME: 25 m, running 105m 
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   668
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   669
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   670
\subsection{Functions}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   671
\begin{frame}[fragile]
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   672
\frametitle{Functions: examples}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   673
  \begin{lstlisting}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   674
def signum( r ):
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   675
    """returns 0 if r is zero
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   676
    -1 if r is negative
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   677
    +1 if r is positive"""
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   678
    if r < 0:
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   679
        return -1
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   680
    elif r > 0:
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   681
        return 1
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   682
    else:
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   683
        return 0
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   684
  \end{lstlisting}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   685
\end{frame}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   686
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   687
\begin{frame}[fragile]
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   688
  \frametitle{Functions: examples}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   689
  \begin{lstlisting}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   690
def pad( n, size ): 
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   691
    """pads integer n with spaces
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   692
    into a string of length size
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   693
    """
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   694
    SPACE = ' '
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   695
    s = str( n )
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   696
    padSize = size - len( s )
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   697
    return padSize * SPACE + s
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   698
  \end{lstlisting}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   699
\pause
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   700
What about \%3d?
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   701
\end{frame}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   702
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   703
\begin{frame}[fragile]
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   704
  {What does this function do?}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   705
  \begin{lstlisting}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   706
def what( n ):
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   707
    if n < 0: n = -n
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   708
    while n > 0:
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   709
        if n % 2 == 1:
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   710
            return False
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   711
        n /= 10
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   712
    return True
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   713
  \end{lstlisting}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   714
\end{frame}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   715
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   716
\begin{frame}[fragile]
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   717
  {What does this function do?}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   718
\begin{lstlisting}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   719
def what( n ):
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   720
    i = 1    
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   721
    while i * i < n:
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   722
        i += 1
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   723
    return i * i == n, i
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   724
  \end{lstlisting}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   725
\end{frame}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   726
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   727
\begin{frame}[fragile]
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   728
  {What does this function do?}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   729
  \begin{lstlisting}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   730
def what( n, x ):
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   731
    z = 1.0
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   732
    if n < 0:
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   733
        x = 1.0 / x
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   734
        n = -n
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   735
    while n > 0:
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   736
        if n % 2 == 1:
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   737
            z *= x
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   738
        n /= 2
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   739
        x *= x
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   740
    return z
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   741
  \end{lstlisting}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   742
\end{frame}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   743
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   744
\begin{frame}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   745
  {Before writing a function}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   746
  \begin{itemize}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   747
      \item Builtin functions for various and sundry
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   748
      \item \typ{abs, any, all, len, max, min}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   749
      \item \typ{pow, range, sum, type}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   750
      \item Refer here:
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   751
          \url{http://docs.python.org/library/functions.html}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   752
  \end{itemize}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   753
  \inctime{15} 
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   754
\end{frame}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   755
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   756
% TIME: 15 m, running 120m 
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   757
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   758
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   759
\begin{frame}{Problem set 2}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   760
  The focus is on writing functions and calling them.
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   761
\end{frame}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   762
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   763
\begin{frame}{Problem 2.1}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   764
  Write a function to return the gcd of two numbers.
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   765
\end{frame}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   766
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   767
\begin{frame}{Problem 2.2}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   768
A pythagorean triad $(a,b,c)$ has the property $a^2 + b^2 = c^2$.\\By primitive we mean triads that do not `depend' on others. For example, (4,3,5) is a variant of (3,4,5) and hence is not primitive. And (10,24,26) is easily derived from (5,12,13) and should not be displayed by our program. \\
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   769
Write a program to print primitive pythagorean triads. The program should generate all triads with a, b values in the range 0---100
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   770
\end{frame}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   771
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   772
\begin{frame}{Problem 2.3}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   773
  Write a program that generates a list of all four digit numbers that have all their digits even and are perfect squares.\\For example, the output should include 6400 but not 8100 (one digit is odd) or 4248 (not a perfect square).
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   774
\end{frame}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   775
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   776
\begin{frame}{Problem 2.4}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   777
  The aliquot of a number is defined as: the sum of the \emph{proper} divisors of the number. For example, the aliquot(12) = 1 + 2 + 3 + 4 + 6 = 16.\\
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   778
  Write a function that returns the aliquot number of a given number. 
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   779
\end{frame}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   780
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   781
\begin{frame}{Problem 2.5}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   782
  A pair of numbers (a, b) is said to be \alert{amicable} if the aliquot number of a is b and the aliquot number of b is a.\\
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   783
  Example: \texttt{220, 284}\\
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   784
  Write a program that prints all five digit amicable pairs.
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   785
  \inctime{30}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   786
\end{frame}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   787
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   788
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   789
% TIME: 30 m, running 150m 
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   790
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   791
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   792
\subsection{Lists}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   793
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   794
\begin{frame}[fragile]
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   795
  \frametitle{List creation and indexing}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   796
\begin{lstlisting}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   797
>>> a = [] # An empty list.
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   798
>>> a = [1, 2, 3, 4] # More useful.
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   799
>>> len(a) 
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   800
4
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   801
>>> a[0] + a[1] + a[2] + a[-1]
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   802
10
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   803
\end{lstlisting}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   804
  \begin{itemize}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   805
  \item Indices start with ?
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   806
  \item Negative indices indicate ?
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   807
  \end{itemize}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   808
\end{frame}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   809
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   810
\begin{frame}[fragile]
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   811
  \frametitle{List: slices}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   812
  \begin{itemize}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   813
  \item Slicing is a basic operation
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   814
  \item \typ{list[initial:final:step]}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   815
  \item  The step is optional
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   816
  \end{itemize}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   817
\begin{lstlisting}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   818
>>> a[1:3] # A slice.
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   819
[2, 3]
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   820
>>> a[1:-1]
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   821
[2, 3, 4]
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   822
>>> a[1:] == a[1:-1]
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   823
False  
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   824
\end{lstlisting}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   825
Explain last result
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   826
\end{frame}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   827
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   828
\begin{frame}[fragile]
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   829
  \frametitle{List: more slices}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   830
\begin{lstlisting}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   831
>>> a[0:-1:2] # Notice the step!
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   832
[1, 3]
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   833
>>> a[::2]
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   834
[1, 3]
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   835
>>> a[-1::-1]
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   836
\end{lstlisting}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   837
What do you think the last one will do?
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   838
  \emphbar{Note: Strings also use same indexing and slicing.}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   839
\end{frame}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   840
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   841
\begin{frame}[fragile]
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   842
  \frametitle{List: examples}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   843
\begin{lstlisting}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   844
>>> a = [1, 2, 3, 4]
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   845
>>> a[:2]
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   846
[1, 3]
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   847
>>> a[0:-1:2]
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   848
[1, 3]
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   849
\end{lstlisting}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   850
\pause
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   851
\alert{Lists are mutable (unlike strings)}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   852
\begin{lstlisting}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   853
>>> a[1] = 20
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   854
>>> a
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   855
[1, 20, 3, 4]
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   856
\end{lstlisting}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   857
\end{frame}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   858
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   859
\begin{frame}[fragile]
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   860
  \frametitle{Lists are mutable and heterogenous}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   861
\begin{lstlisting}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   862
>>> a = ['spam', 'eggs', 100, 1234]
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   863
>>> a[2] = a[2] + 23
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   864
>>> a
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   865
['spam', 'eggs', 123, 1234]
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   866
>>> a[0:2] = [1, 12] # Replace items
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   867
>>> a
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   868
[1, 12, 123, 1234]
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   869
>>> a[0:2] = [] # Remove items
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   870
>>> a.append( 12345 )
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   871
>>> a
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   872
[123, 1234, 12345]
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   873
\end{lstlisting}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   874
\end{frame}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   875
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   876
\begin{frame}[fragile]
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   877
  \frametitle{List methods}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   878
\begin{lstlisting}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   879
>>> a = ['spam', 'eggs', 1, 12]
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   880
>>> a.reverse() # in situ
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   881
>>> a
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   882
[12, 1, 'eggs', 'spam']
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   883
>>> a.append(['x', 1]) 
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   884
>>> a
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   885
[12, 1, 'eggs', 'spam', ['x', 1]]
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   886
>>> a.extend([1,2]) # Extend the list.
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   887
>>> a.remove( 'spam' )
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   888
>>> a
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   889
[12, 1, 'eggs', ['x', 1], 1, 2]
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   890
\end{lstlisting}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   891
\end{frame}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   892
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   893
\begin{frame}[fragile]
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   894
  \frametitle{List containership}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   895
  \begin{lstlisting}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   896
>>> a = ['cat', 'dog', 'rat', 'croc']
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   897
>>> 'dog' in a
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   898
True
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   899
>>> 'snake' in a
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   900
False
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   901
>>> 'snake' not in a
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   902
True
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   903
>>> 'ell' in 'hello world'
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   904
True
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   905
  \end{lstlisting}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   906
\end{frame}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   907
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   908
\begin{frame}[fragile]
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   909
  \frametitle{Tuples: immutable}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   910
\begin{lstlisting}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   911
>>> t = (0, 1, 2)
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   912
>>> print t[0], t[1], t[2], t[-1] 
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   913
0 1 2 2
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   914
>>> t[0] = 1
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   915
Traceback (most recent call last):
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   916
  File "<stdin>", line 1, in ?
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   917
TypeError: object does not support item
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   918
           assignment
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   919
\end{lstlisting}  
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   920
\begin{itemize}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   921
    \item Multiple return values are actually a tuple.
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   922
    \item Exchange is tuple (un)packing
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   923
\end{itemize}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   924
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   925
\end{frame}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   926
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   927
\begin{frame}[fragile]
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   928
  \frametitle{\typ{range()} function}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   929
  \begin{lstlisting}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   930
>>> range(7)
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   931
[0, 1, 2, 3, 4, 5, 6]
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   932
>>> range( 3, 9)
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   933
[3, 4, 5, 6, 7, 8]
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   934
>>> range( 4, 17, 3)
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   935
[4, 7, 10, 13, 16]
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   936
>>> range( 5, 1, -1)
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   937
[5, 4, 3, 2]
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   938
>>> range( 8, 12, -1)
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   939
[]
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   940
  \end{lstlisting}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   941
\end{frame}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   942
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   943
\begin{frame}[fragile]
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   944
  \frametitle{\typ{for\ldots range(\ldots)} idiom}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   945
  \begin{lstlisting}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   946
In [83]: for i in range(5):
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   947
   ....:     print i, i * i
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   948
   ....:     
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   949
   ....:     
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   950
0 0
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   951
1 1
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   952
2 4
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   953
3 9
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   954
4 16
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   955
\end{lstlisting}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   956
\end{frame}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   957
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   958
\begin{frame}[fragile]
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   959
  \frametitle{\typ{for}: the list companion}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   960
  
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   961
  \begin{lstlisting}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   962
In [84]: a = ['a', 'b', 'c']
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   963
In [85]: for x in a:
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   964
   ....:    print x, chr( ord(x) + 10 )
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   965
   ....:
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   966
a  k
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   967
b  l
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   968
c  m
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   969
  \end{lstlisting}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   970
  Iterating over the list and not the index + reference\\
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   971
  what if you want the index?
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   972
\end{frame}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   973
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   974
\begin{frame}[fragile]
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   975
  \frametitle{\typ{for}: the list companion}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   976
  \begin{lstlisting}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   977
In [89]: for p, ch in enumerate( a ):
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   978
   ....:     print p, ch
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   979
   ....:     
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   980
   ....:     
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   981
0 a
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   982
1 b
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   983
2 c
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   984
  \end{lstlisting}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   985
Try: \typ{print enumerate(a)}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   986
\inctime{20}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   987
\end{frame}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   988
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   989
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   990
% TIME: 20 m, running 170m 
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   991
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   992
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   993
\begin{frame}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   994
  {Problem set 3}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   995
  As you can guess, idea is to use \kwrd{for}!
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   996
\end{frame}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   997
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   998
\begin{frame}{Problem 3.1}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   999
  Which of the earlier problems is simpler when we use \kwrd{for} instead of \kwrd{while}? 
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1000
\end{frame}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1001
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1002
\begin{frame}{Problem 3.2}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1003
  Given an empty chessboard and one Bishop placed in any square, say (r, c), generate the list of all squares the Bishop could move to.
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1004
\end{frame}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1005
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1006
\begin{frame}[fragile]
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1007
  \frametitle{Problem 3.3}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1008
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1009
  Given two real numbers \typ{a, b}, and an integer \typ{N}, write a
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1010
  function named \typ{linspace( a, b, N)} that returns an ordered list
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1011
  of \typ{N} points starting with \typ{a} and ending in \typ{b} and
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1012
  equally spaced.\\
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1013
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1014
  For example, \typ{linspace(0, 5, 11)}, should return, \\
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1015
\begin{lstlisting}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1016
[ 0.0 ,  0.5,  1.0 ,  1.5,  2.0 ,  2.5,  
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1017
  3.0 ,  3.5,  4.0 ,  4.5,  5.0 ]
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1018
\end{lstlisting}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1019
\end{frame}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1020
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1021
\begin{frame}[fragile]
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1022
  \frametitle{Problem 3.4a (optional)}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1023
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1024
Use the \typ{linspace} function and generate a list of N tuples of the form\\
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1025
\typ{[($x_1$,f($x_1$)),($x_2$,f($x_2$)),\ldots,($x_N$,f($x_N$))]}\\for the following functions,\begin{itemize}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1026
  \item \typ{f(x) = sin(x)}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1027
  \item \typ{f(x) = sin(x) + sin(10*x)}.
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1028
\end{itemize}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1029
\end{frame}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1030
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1031
\begin{frame}[fragile]
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1032
  \frametitle{Problem 3.4b (optional)}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1033
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1034
  Using the tuples generated earlier, determine the intervals where the roots of the functions lie.
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1035
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1036
  \inctime{15}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1037
\end{frame}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1038
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1039
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1040
% TIME: 15 m, running 185m 
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1041
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1042
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1043
\subsection{IO}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1044
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1045
\begin{frame}[fragile]
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1046
  \frametitle{Simple tokenizing and parsing}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1047
  \begin{lstlisting}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1048
s = """The quick brown fox jumped
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1049
       over the lazy dog"""
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1050
for word in s.split():
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1051
    print word.capitalize()
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1052
  \end{lstlisting}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1053
\end{frame}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1054
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1055
\begin{frame}[fragile]
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1056
  \frametitle{Problem 4.1}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1057
  Given a string like, ``1, 3-7, 12, 15, 18-21'', produce the list \\
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1058
  \begin{lstlisting}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1059
    [1,3,4,5,6,7,12,15,18,19,20,21]
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1060
  \end{lstlisting}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1061
\end{frame}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1062
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1063
\begin{frame}[fragile]
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1064
  \frametitle{File handling}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1065
\begin{lstlisting}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1066
>>> f = open('/path/to/file_name')
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1067
>>> data = f.read() # Read entire file.
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1068
>>> line = f.readline() # Read one line.
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1069
>>> f.close() # close the file.
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1070
\end{lstlisting}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1071
Writing files
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1072
\begin{lstlisting}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1073
>>> f = open('/path/to/file_name', 'w')
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1074
>>> f.write('hello world\n')
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1075
>>> f.close()
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1076
\end{lstlisting}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1077
\begin{itemize}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1078
    \item Everything read or written is a string
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1079
\end{itemize}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1080
\emphbar{Try \typ{file?} for more help}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1081
\end{frame}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1082
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1083
\begin{frame}[fragile]
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1084
    \frametitle{File and \kwrd{for}}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1085
\begin{lstlisting}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1086
>>> f = open('/path/to/file_name')
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1087
>>> for line in f:
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1088
...     print line
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1089
...
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1090
\end{lstlisting}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1091
\end{frame}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1092
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1093
\begin{frame}{Problem 4.2}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1094
    The given file has lakhs of records in the form:\\
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1095
    \typ{RGN;ID;NAME;MARK1;\ldots;MARK5;TOTAL;PFW}\\
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1096
    Some entries may be empty.  Read the data from this file and print the
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1097
    name of the student with the maximum total marks.
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1098
\end{frame}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1099
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1100
\begin{frame}{Problem 4.3}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1101
    For the same data file compute the average marks in different
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1102
    subjects, the student with the maximum mark in each subject and also
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1103
    the standard deviation of the marks.  Do this efficiently.
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1104
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1105
    \inctime{20}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1106
\end{frame}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1107
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1108
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1109
% TIME: 20 m, running 205m 
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1110
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1111
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1112
\subsection{Modules}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1113
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1114
\begin{frame}[fragile]
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1115
    {Modules}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1116
\begin{lstlisting}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1117
>>> sqrt(2)
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1118
Traceback (most recent call last):
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1119
  File "<stdin>", line 1, in <module>
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1120
NameError: name 'sqrt' is not defined
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1121
>>> import math        
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1122
>>> math.sqrt(2)
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1123
1.4142135623730951
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1124
\end{lstlisting}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1125
\end{frame}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1126
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1127
\begin{frame}[fragile]
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1128
    {Modules}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1129
  \begin{itemize}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1130
    \item The \kwrd{import} keyword ``loads'' a module
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1131
    \item One can also use:
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1132
      \begin{lstlisting}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1133
>>> from math import sqrt
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1134
>>> from math import *
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1135
      \end{lstlisting}    
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1136
    \item What is the difference?
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1137
    \item \alert{Use the later only in interactive mode}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1138
    \end{itemize}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1139
  \emphbar{Package hierarchies}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1140
      \begin{lstlisting}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1141
>>> from os.path import exists
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1142
      \end{lstlisting}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1143
\end{frame}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1144
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1145
\begin{frame}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1146
  \frametitle{Modules: Standard library}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1147
  \begin{itemize}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1148
  \item Very powerful, ``Batteries included''
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1149
  \item Some standard modules:
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1150
    \begin{itemize}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1151
    \item Math: \typ{math}, \typ{random}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1152
    \item Internet access: \typ{urllib2}, \typ{smtplib}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1153
    \item System, Command line arguments: \typ{sys}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1154
    \item Operating system interface: \typ{os}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1155
    \item Regular expressions: \typ{re}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1156
    \item Compression: \typ{gzip}, \typ{zipfile}, and \typ{tarfile}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1157
    \item And a whole lot more!
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1158
    \end{itemize}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1159
  \item Check out the Python Library reference:
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1160
    \url{http://docs.python.org/library/}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1161
  \end{itemize}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1162
\end{frame}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1163
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1164
\begin{frame}[fragile]
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1165
    {Modules of special interest}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1166
    \begin{description}[matplotlibfor2d]
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1167
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1168
        \item[\typ{numpy}] Efficient, powerful numeric arrays
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1169
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1170
        \item[\typ{matplotlib}] Easy, interactive, 2D plotting
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1171
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1172
        \item[\typ{scipy}] statistics, optimization, integration, linear
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1173
            algebra, Fourier transforms, signal and image processing,
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1174
            genetic algorithms, ODE solvers, special functions, and more
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1175
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1176
        \item[Mayavi] Easy, interactive, 3D plotting
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1177
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1178
    \end{description}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1179
\end{frame}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1180
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1181
\begin{frame}[fragile]
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1182
    {Creating your own modules}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1183
  \begin{itemize}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1184
  \item Define variables, functions and classes in a file with a
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1185
    \typ{.py} extension
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1186
  \item This file becomes a module!
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1187
  \item Accessible when in the current directory
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1188
  \item Use \typ{cd} in IPython to change directory
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1189
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1190
  \item Naming your module
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1191
      \end{itemize}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1192
\end{frame}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1193
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1194
\begin{frame}[fragile]
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1195
  \frametitle{Modules: example}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1196
  \begin{lstlisting}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1197
# --- arith.py ---
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1198
def gcd(a, b):
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1199
    if a%b == 0: return b
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1200
    return gcd(b, a%b)
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1201
def lcm(a, b):
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1202
    return a*b/gcd(a, b)
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1203
# ------------------
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1204
>>> import arith
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1205
>>> arith.gcd(26, 65)
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1206
13
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1207
>>> arith.lcm(26, 65)
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1208
130
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1209
  \end{lstlisting}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1210
\end{frame}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1211
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1212
\begin{frame}[fragile]
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1213
  \frametitle{Problem 5.1}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1214
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1215
  Put all the functions you have written so far as part of the problems
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1216
  into one module called \typ{iitb.py} and use this module from IPython.
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1217
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1218
\inctime{20}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1219
\end{frame}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1220
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1221
% TIME: 20 m, running 225m 
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1222
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1223
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1224
\begin{frame}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1225
  \frametitle{Did we meet the goal?}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1226
  \tableofcontents
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1227
  % You might wish to add the option [pausesections]
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1228
  \end{frame}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1229
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1230
  \begin{frame}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1231
    {Tomorrow}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1232
    \begin{itemize}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1233
      \item Plotting: 2D, 3D
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1234
      \item NumPy, SciPy
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1235
      \item Dictionary, Set
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1236
      \item Debugging
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1237
      \item Testing
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1238
      \item \ldots
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1239
    \end{itemize}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1240
    11:30--13:00 Discussion of answers to problems OPTIONAL
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1241
  \end{frame}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1242
\end{document}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1243
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1244
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1245
\begin{frame}[fragile]
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1246
  \frametitle{More on functions}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1247
  \begin{itemize}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1248
  \item Support default and keyword arguments
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1249
  \item Scope of variables in the function is local
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1250
  \item Mutable items are \alert{passed by reference}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1251
  \item First line after definition may be a documentation string
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1252
    (\alert{recommended!})
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1253
  \item Function definition and execution defines a name bound to the
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1254
    function
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1255
  \item You \emph{can} assign a variable to a function!
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1256
  \end{itemize}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1257
\end{frame}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1258
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1259
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1260
\begin{frame}[fragile]
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1261
  \frametitle{Functions: default arguments}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1262
  \begin{lstlisting}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1263
def ask_ok(prompt, retries=4, complaint='Yes or no!'):
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1264
    while True:
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1265
        ok = raw_input(prompt)
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1266
        if ok in ('y', 'ye', 'yes'): 
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1267
            return True
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1268
        if ok in ('n', 'no', 'nop', 'nope'): 
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1269
            return False
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1270
        retries = retries - 1
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1271
        if retries < 0: 
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1272
            raise IOError, 'bad user'
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1273
        print complaint
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1274
  \end{lstlisting}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1275
\end{frame}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1276
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1277
\begin{frame}[fragile]
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1278
  \frametitle{Functions: keyword arguments}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1279
  \begin{lstlisting}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1280
def parrot(voltage, state='a stiff', 
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1281
           action='voom', type='Norwegian Blue'):
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1282
    print "-- This parrot wouldn't", action,
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1283
    print "if you put", voltage, "Volts through it."
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1284
    print "-- Lovely plumage, the", type
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1285
    print "-- It's", state, "!"
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1286
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1287
parrot(1000)
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1288
parrot(action = 'VOOOOOM', voltage = 1000000)
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1289
parrot('a thousand', state = 'pushing up the daisies')
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1290
parrot('a million', 'bereft of life', 'jump')
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1291
\end{lstlisting}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1292
\end{frame}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1293
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1294
\begin{frame}[fragile]
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1295
  \frametitle{Functions: arbitrary argument lists}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1296
  \begin{itemize}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1297
  \item Arbitrary number of arguments using \verb+*args+ or
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1298
    \verb+*whatever+
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1299
  \item Keyword arguments using \verb+**kw+
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1300
  \item Given a tuple/dict how do you call a function?
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1301
    \begin{itemize}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1302
    \item Using argument unpacking
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1303
    \item For positional arguments: \verb+foo(*[5, 10])+
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1304
    \item For keyword args: \verb+foo(**{'a':5, 'b':10})+
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1305
    \end{itemize}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1306
  \end{itemize}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1307
\begin{lstlisting}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1308
def foo(a=10, b=100):
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1309
    print a, b
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1310
def func(*args, **keyword):
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1311
    print args, keyword
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1312
# Unpacking:
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1313
args = [5, 10]
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1314
foo(*args)
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1315
kw = {'a':5, 'b':10}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1316
foo(**kw)
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1317
\end{lstlisting}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1318
\end{frame}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1319
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1320
\subsection{Modules, exceptions, classes}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1321
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1322
\begin{frame}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1323
  \frametitle{Modules}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1324
  \begin{itemize}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1325
  \item Define variables, functions and classes in a file with a
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1326
    \typ{.py} extension
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1327
  \item This file becomes a module!
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1328
  \item Modules are searched in the following:
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1329
    \begin{itemize}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1330
    \item Current directory
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1331
    \item Standard: \typ{/usr/lib/python2.3/site-packages/} etc.
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1332
    \item Directories specified in PYTHONPATH
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1333
    \item \typ{sys.path}: current path settings (from the \typ{sys}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1334
      module)
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1335
    \end{itemize}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1336
  \item The \typ{import} keyword ``loads'' a module
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1337
  \item One can also use:
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1338
    \mbox{\typ{from module import name1, name2, name2}}\\
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1339
    where \typ{name1} etc. are names in the module, ``module''
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1340
  \item \typ{from module import *} \ --- imports everything from module,
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1341
    \alert{use only in interactive mode}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1342
  \end{itemize}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1343
\end{frame}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1344
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1345
\begin{frame}[fragile]
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1346
  \frametitle{Modules: example}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1347
  \begin{lstlisting}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1348
# --- foo.py ---
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1349
some_var = 1
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1350
def fib(n): # write Fibonacci series up to n
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1351
    """Print a Fibonacci series up to n."""
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1352
    a, b = 0, 1
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1353
    while b < n:
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1354
        print b,
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1355
        a, b = b, a+b
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1356
# EOF
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1357
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1358
>>> import foo
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1359
>>> foo.fib(10)
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1360
1 1 2 3 5 8 
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1361
>>> foo.some_var
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1362
1
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1363
  \end{lstlisting}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1364
\end{frame}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1365
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1366
\begin{frame}[fragile]
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1367
  \frametitle{Namespaces}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1368
  \begin{itemize}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1369
  \item A mapping from names to objects
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1370
  \item Modules introduce a namespace 
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1371
  \item So do classes
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1372
  \item The running script's namespace is \verb+__main__+
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1373
  \item A modules namespace is identified by its name
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1374
  \item The standard functions (like \typ{len}) are in the
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1375
    \verb+__builtin__+ namespace
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1376
  \item Namespaces help organize different names and their bindings to
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1377
    different objects
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1378
  \end{itemize}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1379
\end{frame}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1380
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1381
\begin{frame}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1382
  \frametitle{Exceptions}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1383
  \begin{itemize}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1384
  \item Python's way of notifying you of errors
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1385
  \item Several standard exceptions: \typ{SyntaxError}, \typ{IOError}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1386
    etc.
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1387
  \item Users can also \typ{raise} errors
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1388
  \item Users can create their own exceptions
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1389
  \item Exceptions can be ``caught'' via \typ{try/except} blocks
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1390
  \end{itemize}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1391
\end{frame}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1392
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1393
\begin{frame}[fragile]
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1394
  \frametitle{Exception: examples}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1395
\begin{lstlisting}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1396
>>> 10 * (1/0)
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1397
Traceback (most recent call last):
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1398
  File "<stdin>", line 1, in ?
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1399
ZeroDivisionError: integer division or modulo by zero
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1400
>>> 4 + spam*3
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1401
Traceback (most recent call last):
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1402
  File "<stdin>", line 1, in ?
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1403
NameError: name 'spam' is not defined
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1404
>>> '2' + 2
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1405
Traceback (most recent call last):
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1406
  File "<stdin>", line 1, in ?
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1407
TypeError: cannot concatenate 'str' and 'int' objects
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1408
\end{lstlisting}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1409
\end{frame}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1410
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1411
\begin{frame}[fragile]
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1412
  \frametitle{Exception: examples}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1413
\begin{lstlisting}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1414
>>> while True:
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1415
...     try:
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1416
...         x = int(raw_input("Enter a number: "))
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1417
...         break
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1418
...     except ValueError:
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1419
...         print "Invalid number, try again..."
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1420
...
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1421
>>> # To raise exceptions
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1422
... raise ValueError, "your error message"
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1423
Traceback (most recent call last):
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1424
  File "<stdin>", line 2, in ?
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1425
ValueError: your error message
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1426
\end{lstlisting}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1427
\end{frame}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1428
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1429
\begin{frame}[fragile]
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1430
  \frametitle{Classes: the big picture}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1431
  \begin{itemize}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1432
  \item Lets you create new data types
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1433
  \item Class is a template for an object belonging to that class
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1434
  \item Note: in Python a class is also an object
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1435
  \item Instantiating a class creates an instance (an object)
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1436
  \item An instance encapsulates the state (data) and behavior
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1437
    (methods)
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1438
  \item Allows you to define an inheritance hierarchy
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1439
    \begin{itemize}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1440
    \item ``A Honda car \alert{is a} car.''
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1441
    \item ``A car \alert{is an} automobile.''
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1442
    \item ``A Python \alert{is a} reptile.''
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1443
    \end{itemize}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1444
  \item Programmers need to think OO
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1445
  \end{itemize}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1446
\end{frame}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1447
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1448
\begin{frame}[fragile]
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1449
  \frametitle{Classes: what's the big deal?}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1450
  \begin{itemize}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1451
  \item Lets you create objects that mimic a real problem being
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1452
    simulated
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1453
  \item Makes problem solving more natural and elegant
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1454
  \item Easier to create code
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1455
  \item Allows for code-reuse
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1456
  \item Polymorphism
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1457
  \end{itemize}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1458
\end{frame}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1459
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1460
\begin{frame}[fragile]
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1461
  \frametitle{Class definition and instantiation}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1462
  \begin{itemize}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1463
  \item Class definitions when executed create class objects
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1464
  \item Instantiating the class object creates an instance of the
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1465
    class
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1466
  \end{itemize}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1467
\footnotesize
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1468
\begin{lstlisting}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1469
class Foo(object):
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1470
    pass
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1471
# class object created.
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1472
# Create an instance of Foo.
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1473
f = Foo()
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1474
# Can assign an attribute to the instance
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1475
f.a = 100
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1476
print f.a
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1477
100
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1478
\end{lstlisting}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1479
\end{frame}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1480
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1481
\begin{frame}[fragile]
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1482
  \frametitle{Classes \ldots}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1483
  \begin{itemize}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1484
  \item All attributes are accessed via the \typ{object.attribute}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1485
    syntax
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1486
  \item Both class and instance attributes are supported
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1487
  \item \emph{Methods} represent the behavior of an object: crudely
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1488
    think of them as functions ``belonging'' to the object
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1489
  \item All methods in Python are ``virtual''
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1490
  \item Inheritance through subclassing
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1491
  \item Multiple inheritance is supported
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1492
  \item No special public and private attributes: only good
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1493
    conventions
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1494
    \begin{itemize}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1495
    \item \verb+object.public()+: public
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1496
    \item \verb+object._private()+ \& \verb+object.__priv()+: 
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1497
      non-public
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1498
    \end{itemize}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1499
  \end{itemize}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1500
\end{frame}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1501
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1502
\begin{frame}[fragile]
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1503
  \frametitle{Classes: examples}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1504
\begin{lstlisting}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1505
class MyClass(object):
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1506
    """Example class (this is the class docstring)."""
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1507
    i = 12345 # A class attribute
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1508
    def f(self):
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1509
        """This is the method docstring"""
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1510
        return 'hello world'
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1511
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1512
>>> a = MyClass() # creates an instance
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1513
>>> a.f()
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1514
'hello world'
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1515
>>> # a.f() is equivalent to MyClass.f(a)
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1516
... # This also explains why f has a 'self' argument.
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1517
... MyClass.f(a)
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1518
'hello world'
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1519
\end{lstlisting}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1520
\end{frame}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1521
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1522
\begin{frame}[fragile]
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1523
  \frametitle{Classes (continued)}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1524
  \begin{itemize}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1525
  \item \typ{self} is \alert{conventionally} the first argument for a
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1526
    method
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1527
  \item In previous example, \typ{a.f} is a method object
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1528
  \item When \typ{a.f} is called, it is passed the instance \typ{a} as
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1529
    the first argument
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1530
  \item If a method called \verb+__init__+ exists, it is called when
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1531
    the object is created
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1532
  \item If a method called \verb+__del__+ exists, it is called before
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1533
    the object is garbage collected
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1534
  \item Instance attributes are set by simply ``setting'' them in
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1535
    \typ{self}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1536
  \item Other special methods (by convention) like \verb+__add__+ let
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1537
    you define numeric types:
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1538
    {\footnotesize \url{http://docs.python.org/ref/specialnames.html}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1539
      \\ \url{http://docs.python.org/ref/numeric-types.html}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1540
    }
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1541
  \end{itemize}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1542
\end{frame}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1543
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1544
\begin{frame}[fragile]
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1545
  \frametitle{Classes: examples}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1546
\begin{lstlisting}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1547
class Bag(MyClass): # Shows how to derive classes
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1548
    def __init__(self): # called on object creation.
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1549
        self.data = [] # an instance attribute
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1550
    def add(self, x):
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1551
        self.data.append(x)
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1552
    def addtwice(self, x):
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1553
        self.add(x)
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1554
        self.add(x)
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1555
>>> a = Bag()
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1556
>>> a.f() # Inherited method
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1557
'hello world'
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1558
>>> a.add(1); a.addtwice(2)
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1559
>>> a.data
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1560
[1, 2, 2]
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1561
\end{lstlisting}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1562
\end{frame}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1563
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1564
\begin{frame}[fragile]
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1565
  \frametitle{Derived classes}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1566
  \begin{itemize}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1567
  \item Call the parent's \verb+__init__+ if needed
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1568
  \item If you don't need a new constructor, no need to define it in subclass
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1569
  \item Can also use the \verb+super+ built-in function
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1570
  \end{itemize}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1571
\begin{lstlisting}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1572
class AnotherBag(Bag):
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1573
    def __init__(self):
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1574
        # Must call parent's __init__ explicitly
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1575
        Bag.__init__(self)
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1576
        # Alternatively use this:
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1577
        super(AnotherBag, self).__init__()
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1578
        # Now setup any more data.
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1579
        self.more_data = []
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1580
\end{lstlisting}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1581
\end{frame}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1582
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1583
\begin{frame}[fragile]
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1584
  \frametitle{Classes: polymorphism}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1585
\begin{lstlisting}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1586
class Drawable(object):
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1587
    def draw(self):
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1588
        # Just a specification.
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1589
        pass
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1590
\end{lstlisting}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1591
\mode<presentation>{\pause}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1592
\begin{lstlisting}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1593
class Square(Drawable):
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1594
    def draw(self):
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1595
        # draw a square.
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1596
class Circle(Drawable):
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1597
    def draw(self):
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1598
        # draw a circle.
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1599
\end{lstlisting}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1600
\mode<presentation>{\pause}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1601
\begin{lstlisting}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1602
class Artist(Drawable):
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1603
    def draw(self):
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1604
        for obj in self.drawables:
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1605
            obj.draw()
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1606
\end{lstlisting}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1607
\end{frame}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1608
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1609
\subsection{Miscellaneous}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1610
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1611
\begin{frame}[fragile]
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1612
  \frametitle{Stand-alone scripts}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1613
Consider a file \typ{f.py}:
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1614
\begin{lstlisting}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1615
#!/usr/bin/env python
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1616
"""Module level documentation."""
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1617
# First line tells the shell that it should use Python
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1618
# to interpret the code in the file.
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1619
def f():
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1620
    print "f"
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1621
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1622
# Check if we are running standalone or as module.
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1623
# When imported, __name__ will not be '__main__'
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1624
if __name__ == '__main__':
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1625
    # This is not executed when f.py is imported.
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1626
    f() 
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1627
\end{lstlisting}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1628
\end{frame}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1629
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1630
\begin{frame}[fragile]
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1631
  \frametitle{List comprehensions}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1632
\begin{lstlisting}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1633
>>> veg = ['tomato', 'cabbage', 'carrot', 'potato']
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1634
>>> [x.upper() for x in veg]
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1635
['TOMATO', 'CABBAGE', 'CARROT', 'POTATO']
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1636
>>> vec = range(0, 8)
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1637
>>> even = [x for x in vec if x%2 == 0]
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1638
>>> even
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1639
[0, 2, 4, 6]
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1640
>>> [x*x for x in even]
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1641
[0, 4, 16, 36]
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1642
>>> odd = [x for x in vec if x%2 == 1]
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1643
>>> odd
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1644
[1, 3, 5, 7]
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1645
>>> [x*y for x in even for y in odd]
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1646
[0, 0, 0, 0, 2, 6, 10, 14, 4, 12, 20, 28, 6, 18,30,42]
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1647
\end{lstlisting}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1648
\end{frame}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1649
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1650
\begin{frame}[fragile]
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1651
  \frametitle{More IPython features}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1652
  \begin{itemize}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1653
  \item Input and output caching:
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1654
    \begin{itemize}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1655
    \item \verb+In+: a list of all entered input
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1656
    \item \verb+Out+: a dict of all output
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1657
    \item \verb+_+, \verb+__+, \verb+__+ are the last three results as
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1658
      is \verb+_N+
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1659
    \item \verb+%hist [-n]+ macro shows previous history, \verb+-n+
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1660
      suppresses line number information
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1661
    \end{itemize}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1662
  \item Log the session using \verb+%logstart+, \verb+%logon+ and
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1663
    \verb+%logoff+
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1664
  \item \verb+%run [options] file[.py]+ -- running Python code
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1665
    \begin{itemize}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1666
    \item \verb+%run -d [-b<N>]+: debug script with pdb
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1667
          \verb+N+ is the line number to break at (defaults to 1)
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1668
    \item \verb+%run -t+: time the script
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1669
    \item \verb+%run -p+: Profile the script
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1670
    \end{itemize}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1671
  \item \verb+%prun+ runs a statement/expression under the profiler
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1672
  \item \verb+%macro [options] macro_name n1-n2 n3-n4 n6+ save specified
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1673
    lines to a macro with name \verb+macro_name+
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1674
  \end{itemize}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1675
\end{frame}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1676
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1677
\begin{frame}[fragile]
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1678
  \frametitle{More IPython features \ldots}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1679
  \begin{itemize}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1680
  \item \verb+%edit [options] [args]+: edit lines of code or file
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1681
    specified in editor (configure editor via \verb+$EDITOR+)
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1682
  \item \verb+%cd+ changes directory, see also \verb+%pushd, %popd, %dhist+
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1683
  \item Shell access
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1684
    \begin{itemize}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1685
    \item \verb+!command+ runs a shell command and returns its output
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1686
    \item \verb+files = %sx ls+ or \verb+files = !ls+ sets
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1687
      \verb+files+ to all result of the \verb+ls+ command
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1688
    \item \verb+%sx+ is quiet
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1689
    \item \verb+!ls $files+ passes the \verb+files+ variable to the
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1690
      shell command
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1691
    \item \verb+%alias alias_name cmd+ creates an alias for a system
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1692
      command
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1693
    \end{itemize}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1694
  \item \verb+%colors+ lets you change the color scheme to
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1695
    \verb+NoColor, Linux, LightBG+
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1696
  \end{itemize}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1697
\end{frame}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1698
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1699
\begin{frame}[fragile]
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1700
  \frametitle{More IPython features \ldots}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1701
  \begin{itemize}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1702
  \item Use \verb+;+ at the end of a statement to suppress printing
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1703
    output
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1704
  \item \verb+%bookmark+: store a bookmarked location, for use with \verb+%cd+
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1705
  \item \verb+%who, %whos+: print information on variables
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1706
  \item \verb+%save [options] filename n1-n2 n3-n4+: save lines to a
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1707
    file
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1708
  \item \verb+%time statement+: Time execution of a Python statement or
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1709
    expression
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1710
  \item \verb+%timeit [-n<N> -r<R> [-t|-c]] statement+: time execution
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1711
    using Python's timeit module
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1712
  \item Can define and use profiles to setup IPython differently:
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1713
    \verb+math, scipy, numeric, pysh+ etc.
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1714
  \item \verb+%magic+: \alert{Show help on all magics}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1715
  \end{itemize}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1716
\end{frame}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1717
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1718
\begin{frame}[fragile]
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1719
  \frametitle{File handling}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1720
\begin{lstlisting}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1721
>>> # Reading files:
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1722
... f = open('/path/to/file_name')
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1723
>>> data = f.read() # Read entire file.
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1724
>>> line = f.readline() # Read one line.
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1725
>>> # Read entire file appending each line into a list
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1726
... lines = f.readlines()
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1727
>>> f.close() # close the file.
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1728
>>> # Writing files:
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1729
... f = open('/path/to/file_name', 'w')
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1730
>>> f.write('hello world\n')
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1731
\end{lstlisting}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1732
  \begin{itemize}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1733
  \item \typ{tell()}: returns int of current position
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1734
  \item \typ{seek(pos)}: moves current position to specified byte
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1735
  \item Call \typ{close()} when done using a file
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1736
  \end{itemize}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1737
\end{frame}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1738
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1739
\begin{frame}[fragile]
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1740
  \frametitle{Math}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1741
  \begin{itemize}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1742
  \item \typ{math} module provides basic math routines for
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1743
    floats
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1744
  \item \typ{cmath} module provides math routies for complex
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1745
    numbers
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1746
  \item \typ{random}: provides pseudo-random number generators
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1747
    for various distributions
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1748
  \item These are always available and part of the standard library
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1749
  \item More serious math is provided by the NumPy/SciPy modules --
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1750
    these are not standard and need to be installed separately
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1751
  \end{itemize}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1752
\end{frame}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1753
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1754
\begin{frame}[fragile]
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1755
  \frametitle{Timing and profiling}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1756
  \begin{itemize}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1757
  \item Timing code: use the \typ{time} module
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1758
  \item Read up on \typ{time.time()} and \typ{time.clock()}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1759
  \item \typ{timeit}: is a better way of doing timing
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1760
  \item IPython has handy \typ{time} and \typ{timeit} macros (type
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1761
    \typ{timeit?} for help)
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1762
  \item IPython lets you debug and profile code via the \typ{run}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1763
    macro (type \typ{run?} on the prompt to learn more)
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1764
  \end{itemize}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1765
\end{frame}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1766
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1767
\begin{frame}[fragile]
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1768
  \frametitle{Odds and ends}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1769
  \begin{itemize}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1770
  \item \typ{dir([object])} function: attributes of given object
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1771
  \item \typ{type(object)}: returns type information
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1772
  \item \typ{str(), repr()}: convert object to string representation
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1773
  \item \typ{isinstance, issubclass}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1774
  \item \typ{assert} statements let you do debugging assertions in
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1775
    code
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1776
  \item \typ{csv} module: reading and writing CSV files
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1777
  \item \typ{pickle}: lets you save and load Python objects
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1778
    (\alert{serialization})
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1779
  \item \typ{sys.argv}: command line arguments
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1780
  \item \typ{os.path}: common path manipulations
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1781
  \item Check out the Python Library reference:
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1782
    \url{http://docs.python.org/lib/lib.html}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1783
  \end{itemize}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1784
\end{frame}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1785
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1786
\begin{frame}[fragile]
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1787
  \frametitle{Test driven development (TDD)}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1788
  \begin{itemize}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1789
      \item Why?
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1790
          \begin{itemize}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1791
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1792
            \item Forces you to write reusable code!
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1793
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1794
            \item Think about the API
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1795
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1796
            \item More robust
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1797
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1798
            \item Makes refactoring very easy
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1799
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1800
          \end{itemize}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1801
      \item How?  Python offers three major ways of doing this
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1802
          \begin{itemize}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1803
              \item doctest
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1804
              \item unittest
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1805
              \item nosetest (and similar like py.test)
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1806
          \end{itemize}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1807
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1808
      \item Test every piece of functionality you offer
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1809
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1810
      \item This isn't a formal introduction but more a practical one
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1811
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1812
  \end{itemize}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1813
\end{frame}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1814
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1815
\begin{frame}[fragile]
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1816
  \frametitle{Unit test}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1817
\begin{lstlisting}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1818
import unittest
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1819
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1820
class MyTestCase(unittest.TestCase):
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1821
    def setUp(self):
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1822
        # Called *before* each test_* 
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1823
    def tearDown(self):
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1824
        # Called *after* each test_* 
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1825
    def test_something(self):
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1826
        "docstring"
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1827
        #  Test code.
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1828
        self.assertEqual(x, y)
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1829
        self.assertRaises(ValueError, func, arg1, arg2 ...)
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1830
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1831
if __name__ == '__main__':
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1832
    unittest.main() 
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1833
\end{lstlisting}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1834
\end{frame}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1835
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1836
\begin{frame}[fragile]
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1837
    \frametitle{Nosetest}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1838
\begin{lstlisting}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1839
import particle
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1840
def test_particle():
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1841
    # Use asserts here.
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1842
    p = particle.Particle(1.0)
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1843
    assert p.property[0] == 1.0
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1844
    assert p.property[2] == 0.0
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1845
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1846
if __name__ == '__main__':
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1847
    import nose
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1848
    nose.main()
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1849
\end{lstlisting}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1850
\end{frame}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1851
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1852
\begin{frame}[fragile]
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1853
  \frametitle{Testing}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1854
  \begin{itemize}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1855
      \item More details: see library reference and search for nosetest
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1856
  \end{itemize}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1857
\end{frame}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1858
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1859
\section{Numerics \& Plotting}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1860
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1861
\subsection{NumPy Arrays}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1862
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1863
\newcommand{\num}{\texttt{numpy}}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1864
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1865
\begin{frame}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1866
  \frametitle{The \num\ module}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1867
  \begin{itemize}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1868
  \item Manipulating large Python lists for scientific computing is
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1869
    \alert{slow}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1870
  \item Most complex computations can be reduced to a few standard
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1871
    operations
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1872
  \item The \num\ module provides:
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1873
    \begin{itemize}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1874
    \item An efficient and powerful array type for various common data
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1875
      types
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1876
    \item Abstracts out the most commonly used standard operations on
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1877
      arrays
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1878
    \end{itemize}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1879
  \item Numeric was the first, then came \texttt{numarray}.
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1880
    \texttt{numpy} is the latest and is the future
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1881
  \item This course uses \num\ and only covers the absolute basics
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1882
  \end{itemize}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1883
\end{frame}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1884
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1885
\begin{frame}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1886
  \frametitle{Basic concepts}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1887
  \begin{itemize}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1888
  \item \num\ arrays are of a fixed size (\typ{arr.size}) and have the
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1889
    same type (\typ{arr.dtype})
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1890
  \item \num\ arrays may have arbitrary dimensionality
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1891
  \item The \typ{shape} of an array is the extent (length) of the
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1892
    array along each dimension
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1893
  \item The \typ{rank(arr)} of an array is the ``dimensionality'' of the
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1894
    array
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1895
  \item The \typ{arr.itemsize} is the number of bytes (8-bits) used for
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1896
    each element of the array
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1897
  \item \alert{Note:} The \typ{shape} and \typ{rank} may change as
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1898
    long as the \typ{size} of the array is fixed
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1899
  \item \alert{Note:} \typ{len(arr) != arr.size} in general
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1900
  \item \alert{Note:} By default array operations are performed
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1901
    \alert{elementwise}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1902
  \item Indices start from 0
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1903
  \end{itemize}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1904
\end{frame}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1905
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1906
\begin{frame}[fragile]
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1907
  \frametitle{Examples of \num}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1908
\begin{lstlisting}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1909
# Simple array math example
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1910
>>> from numpy import *
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1911
>>> a = array([1,2,3,4])
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1912
>>> b = array([2,3,4,5])
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1913
>>> a + b # Element wise addition!
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1914
array([3, 5, 7, 9])
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1915
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1916
>>> print pi, e  # Pi and e are defined.
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1917
3.14159265359 2.71828182846
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1918
# Create array from 0 to 10
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1919
>>> x = arange(0.0, 10.0, 0.05)
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1920
>>> x *= 2*pi/10 # multiply array by scalar value
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1921
array([ 0.,0.0314,...,6.252])
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1922
# apply functions to array.
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1923
>>> y = sin(x)
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1924
\end{lstlisting}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1925
\end{frame}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1926
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1927
\begin{frame}[fragile]
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1928
  \frametitle{More examples of \num}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1929
\vspace*{-8pt}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1930
\begin{lstlisting}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1931
# Size, shape, rank, type etc.
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1932
>>> x = array([1., 2, 3, 4])
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1933
>>> size(x)
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1934
4
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1935
>>> x.dtype # or x.dtype.char
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1936
'd'
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1937
>>> x.shape
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1938
(4,)
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1939
>>> print rank(x), x.itemsize
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1940
1 8
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1941
>>> x.tolist()
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1942
[1.0, 2.0, 3.0, 4.0]
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1943
# Array indexing
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1944
>>> x[0] = 10
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1945
>>> print x[0], x[-1]
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1946
10.0 4.0
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1947
\end{lstlisting}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1948
\end{frame}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1949
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1950
\begin{frame}[fragile]
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1951
  \frametitle{Multi-dimensional arrays}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1952
\begin{lstlisting}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1953
>>> a = array([[ 0, 1, 2, 3],
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1954
...            [10,11,12,13]])
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1955
>>> a.shape # (rows, columns)
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1956
(2, 4)
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1957
# Accessing and setting values
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1958
>>> a[1,3] 
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1959
13
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1960
>>> a[1,3] = -1
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1961
>>> a[1] # The second row
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1962
array([10,11,12,-1])
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1963
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1964
# Flatten/ravel arrays to 1D arrays
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1965
>>> a.flat  # or ravel(a)
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1966
array([0,1,2,3,10,11,12,-1])
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1967
# Note: flat references original memory
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1968
\end{lstlisting}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1969
\end{frame}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1970
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1971
\begin{frame}[fragile]
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1972
  \frametitle{Slicing arrays}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1973
\begin{lstlisting}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1974
>>> a = array([[1,2,3], [4,5,6], [7,8,9]])
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1975
>>> a[0,1:3]
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1976
array([2, 3])
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1977
>>> a[1:,1:]
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1978
array([[5, 6],
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1979
       [8, 9]])
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1980
>>> a[:,2]
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1981
array([3, 6, 9])
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1982
# Striding...
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1983
>>> a[0::2,0::2]
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1984
array([[1, 3],
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1985
       [7, 9]])
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1986
# All these slices are references to the same memory!
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1987
\end{lstlisting}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1988
\end{frame}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1989
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1990
% \begin{frame}[fragile]
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1991
%   \frametitle{Array types and typecodes}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1992
%   \begin{tabular}[c]{|c|c|p{2.75in}|}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1993
%     \hline
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1994
%     Character & Bits (bytes) & Type name \\
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1995
%     \hline
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1996
%     D & 128 (16) & \typ{Complex, Complex64}\\
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1997
%     F & 64   (8) & \typ{Complex0, Complex8, Complex16} \\
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1998
%     d & 64   (8) & \typ{Float, Float64} \\
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  1999
%     f & 32   (4) & \typ{Float0, Float8, Float16} \\
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2000
%     i & 32   (4) & \typ{Int32} \\
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2001
%     l & 32   (4) & \typ{Int} \\
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2002
%     O & 4    (1) & \typ{PyObject} \\
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2003
%     %b 8     (1) UnsignedInt8
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2004
%     %1 (one) 8     (1) Int8
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2005
%     %s 16   (2) Int16
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2006
%     \hline
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2007
%   \end{tabular}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2008
% \begin{lstlisting}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2009
% # Examples
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2010
% >>> f = array([1,2,3], Float32)
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2011
% >>> c = array([1,2,3], Complex32)
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2012
% >>> print f, c
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2013
% [ 1.  2.  3.] [ 1.+0.j  2.+0.j  3.+0.j]
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2014
% \end{lstlisting}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2015
% \end{frame}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2016
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2017
\begin{frame}[fragile]
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2018
  \frametitle{Array creation functions}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2019
  \begin{itemize}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2020
  \item \typ{array(object, dtype=None, copy=1,order=None, subok=0,ndmin=0)}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2021
  \item \typ{arange(start, stop=None, step=1, dtype=None)}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2022
  \item \typ{linspace(start, stop, num=50, endpoint=True, retstep=False)}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2023
  \item \typ{ones(shape, dtype=None, order='C')}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2024
  \item \typ{zeros((d1,...,dn),dtype=float,order='C')}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2025
  \item \typ{identity(n)}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2026
  \item \typ{empty((d1,...,dn),dtype=float,order='C')}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2027
  \item \typ{ones\_like(x)}, \typ{zeros\_like(x)}, \typ{empty\_like(x)}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2028
  \end{itemize}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2029
\end{frame}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2030
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2031
\begin{frame}[fragile]
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2032
  \frametitle{Array math}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2033
  \begin{itemize}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2034
  \item Basic \alert{elementwise} math (given two arrays \typ{a, b}):
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2035
    \begin{itemize}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2036
    \item \typ{a + b $\rightarrow$ add(a, b)} 
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2037
    \item \typ{a - b, $\rightarrow$ subtract(a, b)} 
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2038
    \item \typ{a * b, $\rightarrow$ multiply(a, b)} 
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2039
    \item \typ{a / b, $\rightarrow$ divide(a, b)} 
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2040
    \item \typ{a \% b, $\rightarrow$ remainder(a, b)} 
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2041
    \item \typ{a ** b, $\rightarrow$ power(a, b)}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2042
    \end{itemize}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2043
  \item Inplace operators: \typ{a += b}, or \typ{add(a, b,
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2044
      a)} etc.
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2045
  \item Logical operations: \typ{equal (==)}, \typ{not\_equal (!=)},
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2046
    \typ{less (<)}, \typ{greater (>)} etc.
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2047
  \item Trig and other functions: \typ{sin(x), arcsin(x), sinh(x),
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2048
      exp(x), sqrt(x)} etc.
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2049
  \item \typ{sum(x, axis=0), product(x, axis=0)}: sum and product of array elements 
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2050
  \item \typ{dot(a, b)}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2051
  \end{itemize}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2052
\end{frame}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2053
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2054
\begin{frame}[fragile]
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2055
  \frametitle{Advanced}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2056
  \begin{itemize}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2057
  \item Only scratched the surface of \num
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2058
  \item Ufunc methods: \typ{reduce, accumulate, outer, reduceat}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2059
  \item Typecasting
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2060
  \item More functions: \typ{take, choose, where, compress,
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2061
      concatenate}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2062
  \item Array broadcasting and \typ{None}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2063
  \end{itemize}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2064
\end{frame}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2065
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2066
\subsection{Plotting: Matplotlib}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2067
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2068
\begin{frame}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2069
  \frametitle{About \texttt{matplotlib}}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2070
  \begin{itemize}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2071
  \item Easy to use, scriptable, ``Matlab-like'' 2D plotting
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2072
  \item Publication quality figures and interactive capabilities
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2073
  \item Plots, histograms, power spectra, bar charts, errorcharts,
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2074
    scatterplots, etc.
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2075
  \item Also does polar plots, maps, contours
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2076
  \item Support for simple \TeX\ markup
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2077
  \item Multiple output backends (images, EPS, SVG, wx, Agg, Tk, GTK)
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2078
  \item Cross-platform: Linux, Win32, Mac OS X
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2079
  \item Good idea to use via IPython:  \typ{ipython -pylab}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2080
  \item From scripts use: \typ{import pylab}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2081
  \end{itemize}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2082
\end{frame}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2083
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2084
\begin{frame}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2085
  \frametitle{More information}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2086
  \begin{itemize}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2087
  \item More information here: \url{http://matplotlib.sf.net}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2088
  \item \url{http://matplotlib.sf.net/tutorial.html}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2089
  \item \url{http://matplotlib.sf.net/screenshots.html}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2090
  \end{itemize}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2091
\end{frame}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2092
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2093
\begin{frame}[fragile]
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2094
  \frametitle{Basic plotting with \texttt{matplotlib}}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2095
\begin{lstlisting}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2096
>>> x = arange(0, 2*pi, 0.05)
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2097
>>> plot(x, sin(x)) # Same as plot(x, sin(x), 'b-') 
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2098
>>> plot(x, sin(x), 'ro')
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2099
>>> axis([0,2*pi, -1,1])
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2100
>>> xlabel(r'$\chi$', color='g')
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2101
>>> ylabel(r'sin($\chi$)', color='r')
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2102
>>> title('A simple figure', fontsize=20)
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2103
>>> savefig('/tmp/test.eps')
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2104
# Multiple plots in one figure
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2105
>>> t = arange(0.0, 5.2, 0.2)
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2106
# red dashes, blue squares and green triangles
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2107
>>> plot(t, t, 'r--', t, t**2, 'bs', t, t**3, 'g^')
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2108
\end{lstlisting}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2109
\end{frame}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2110
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2111
\begin{frame}[fragile]
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2112
  \frametitle{Basic plotting \ldots}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2113
\begin{lstlisting}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2114
# Set properties of objects:
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2115
>>> plot(x, sin(x), linewidth=2.0, color='r')
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2116
>>> l, = plot(x, sin(x))
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2117
>>> setp(l, linewidth=2.0, color='r')
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2118
>>> l.set_linewidth(2.0); l.set_color('r')
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2119
>>> draw() # Redraws current figure.
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2120
>>> setp(l) # Prints available properties
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2121
>>> close() # Closes the figure.
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2122
# Multiple figures:
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2123
>>> figure(1); plot(x, sin(x))
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2124
>>> figure(2); plot(x, tanh(x))
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2125
>>> figure(1); title('Easy as 1,2,3')
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2126
\end{lstlisting}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2127
\end{frame}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2128
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2129
\begin{frame}[fragile]
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2130
  \frametitle{Basic plotting \ldots}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2131
\begin{lstlisting}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2132
>>> figure(1)
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2133
>>> subplot(211) # Same as subplot(2, 1, 1)
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2134
>>> plot(x, cos(5*x)*exp(-x))
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2135
>>> subplot(2, 1, 2)
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2136
>>> plot(x, cos(5*x), 'r--', label='cosine')
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2137
>>> plot(x, sin(5*x), 'g--', label='sine')
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2138
>>> legend() # Or legend(['cosine', 'sine'])
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2139
>>> text(1,0, '(1,0)')
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2140
>>> axes = gca() # Current axis
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2141
>>> fig = gcf() # Current figure
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2142
\end{lstlisting}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2143
\end{frame}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2144
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2145
\begin{frame}[fragile]
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2146
  \frametitle{X-Y plot}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2147
  \begin{columns}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2148
    \column{0.5\textwidth}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2149
    \hspace*{-0.5in}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2150
    \includegraphics[height=2in, interpolate=true]{data/xyplot}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2151
    \column{0.45\textwidth}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2152
    \begin{block}{Example code}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2153
    \tiny
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2154
\begin{lstlisting}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2155
t1 = arange(0.0, 5.0, 0.1)
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2156
t2 = arange(0.0, 5.0, 0.02)
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2157
t3 = arange(0.0, 2.0, 0.01)
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2158
subplot(211)
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2159
plot(t1, cos(2*pi*t1)*exp(-t1), 'bo', 
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2160
     t2, cos(2*pi*t2)*exp(-t2), 'k')
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2161
grid(True)
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2162
title('A tale of 2 subplots')
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2163
ylabel('Damped')
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2164
subplot(212)
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2165
plot(t3, cos(2*pi*t3), 'r--')
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2166
grid(True)
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2167
xlabel('time (s)')
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2168
ylabel('Undamped')
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2169
\end{lstlisting}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2170
    \end{block}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2171
  \end{columns}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2172
\end{frame}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2173
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2174
\begin{frame}[fragile] \frametitle{Errorbar}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2175
  \begin{columns}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2176
    \column{0.5\textwidth}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2177
    \hspace*{-0.5in}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2178
  \includegraphics[height=2in, interpolate=true]{data/errorbar}  
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2179
    \column{0.45\textwidth}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2180
    \begin{block}{Example code}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2181
    \tiny
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2182
\begin{lstlisting}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2183
t = arange(0.1, 4, 0.1)
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2184
s = exp(-t)
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2185
e = 0.1*abs(randn(len(s)))
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2186
f = 0.1*abs(randn(len(s)))
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2187
g = 2*e
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2188
h = 2*f
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2189
errorbar(t, s, [e,g], f, fmt='o')
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2190
xlabel('Distance (m)')
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2191
ylabel('Height (m)')
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2192
title('Mean and standard error '\
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2193
      'as a function of distance')
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2194
\end{lstlisting}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2195
  \end{block}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2196
\end{columns}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2197
\end{frame}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2198
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2199
\begin{frame}[fragile] \frametitle{Semi-log and log-log plots}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2200
  \begin{columns}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2201
    \column{0.5\textwidth}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2202
    \hspace*{-0.5in}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2203
  \includegraphics[height=2in, interpolate=true]{data/log}  
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2204
    \column{0.45\textwidth}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2205
    \begin{block}{Example code}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2206
    \tiny
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2207
\begin{lstlisting}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2208
dt = 0.01
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2209
t = arange(dt, 20.0, dt)
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2210
subplot(311)
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2211
semilogy(t, exp(-t/5.0))
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2212
ylabel('semilogy')
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2213
grid(True)
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2214
subplot(312)
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2215
semilogx(t, sin(2*pi*t))
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2216
ylabel('semilogx')
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2217
grid(True)
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2218
# minor grid on too
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2219
gca().xaxis.grid(True, which='minor')  
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2220
subplot(313)
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2221
loglog(t, 20*exp(-t/10.0), basex=4)
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2222
grid(True)
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2223
ylabel('loglog base 4 on x')
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2224
\end{lstlisting}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2225
  \end{block}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2226
\end{columns}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2227
\end{frame}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2228
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2229
\begin{frame}[fragile] \frametitle{Histogram}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2230
  \begin{columns}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2231
    \column{0.5\textwidth}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2232
    \hspace*{-0.5in}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2233
  \includegraphics[height=2in, interpolate=true]{data/histogram}  
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2234
    \column{0.45\textwidth}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2235
    \begin{block}{Example code}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2236
    \tiny
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2237
\begin{lstlisting}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2238
mu, sigma = 100, 15
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2239
x = mu + sigma*randn(10000)
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2240
# the histogram of the data
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2241
n, bins, patches = hist(x, 100, normed=1)
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2242
# add a 'best fit' line
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2243
y = normpdf( bins, mu, sigma)
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2244
l = plot(bins, y, 'r--', linewidth=2)
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2245
xlim(40, 160)
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2246
xlabel('Smarts')
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2247
ylabel('P')
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2248
title(r'$\rm{IQ:}\/ \mu=100,\/ \sigma=15$')
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2249
\end{lstlisting}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2250
  \end{block}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2251
\end{columns}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2252
\end{frame}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2253
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2254
\begin{frame}[fragile] \frametitle{Bar charts}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2255
  \begin{columns}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2256
    \column{0.5\textwidth}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2257
    \hspace*{-0.5in}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2258
  \includegraphics[height=2in, interpolate=true]{data/barchart}  
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2259
    \column{0.45\textwidth}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2260
    \begin{block}{Example code}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2261
    \tiny
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2262
\begin{lstlisting}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2263
N = 5
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2264
menMeans = (20, 35, 30, 35, 27)
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2265
menStd =   ( 2,  3,  4,  1,  2)
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2266
# the x locations for the groups
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2267
ind = arange(N) 
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2268
# the width of the bars
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2269
width = 0.35       
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2270
p1 = bar(ind, menMeans, width, 
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2271
         color='r', yerr=menStd)
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2272
womenMeans = (25, 32, 34, 20, 25)
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2273
womenStd =   ( 3,  5,  2,  3,  3)
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2274
p2 = bar(ind+width, womenMeans, width, 
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2275
         color='y', yerr=womenStd)
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2276
ylabel('Scores')
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2277
title('Scores by group and gender')
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2278
xticks(ind+width, 
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2279
       ('G1', 'G2', 'G3', 'G4', 'G5'))
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2280
xlim(-width,len(ind))
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2281
yticks(arange(0,41,10))
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2282
legend((p1[0], p2[0]), 
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2283
       ('Men', 'Women'), shadow=True)
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2284
\end{lstlisting}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2285
  \end{block}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2286
\end{columns}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2287
\end{frame}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2288
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2289
\begin{frame}[fragile] \frametitle{Pie charts}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2290
  \begin{columns}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2291
    \column{0.5\textwidth}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2292
    \hspace*{-0.4in}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2293
  \includegraphics[height=2.0in, interpolate=true]{data/piechart}  
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2294
    \column{0.45\textwidth}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2295
    \begin{block}{Example code}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2296
    \tiny
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2297
\begin{lstlisting}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2298
# make a square figure and axes
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2299
figure(1, figsize=(8,8))
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2300
ax = axes([0.1, 0.1, 0.8, 0.8])
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2301
labels = 'Frogs', 'Hogs', 'Dogs', 'Logs'
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2302
fracs = [15,30,45, 10]
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2303
explode=(0, 0.05, 0, 0)
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2304
pie(fracs, explode=explode, labels=labels, 
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2305
    autopct='%1.1f%%', shadow=True)
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2306
title('Raining Hogs and Dogs', 
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2307
      bbox={'facecolor':'0.8', 'pad':5})
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2308
\end{lstlisting}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2309
  \end{block}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2310
\end{columns}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2311
\end{frame}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2312
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2313
\begin{frame}[fragile] \frametitle{Scatter plots}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2314
  \begin{columns}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2315
    \column{0.5\textwidth}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2316
    \hspace*{-0.4in}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2317
  \includegraphics[height=2in, interpolate=true]{data/scatter}  
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2318
    \column{0.45\textwidth}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2319
    \begin{block}{Example code}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2320
    \tiny
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2321
\begin{lstlisting}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2322
N = 30
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2323
x = 0.9*rand(N)
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2324
y = 0.9*rand(N)
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2325
# 0 to 10 point radiuses
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2326
area = pi*(10 * rand(N))**2 
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2327
volume = 400 + rand(N)*450
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2328
scatter(x,y,s=area, marker='o', c=volume, 
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2329
        alpha=0.75)
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2330
xlabel(r'$\Delta_i$', size='x-large')
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2331
ylabel(r'$\Delta_{i+1}$', size='x-large')
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2332
title(r'Volume and percent change')
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2333
grid(True)
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2334
colorbar()
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2335
savefig('scatter')
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2336
\end{lstlisting}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2337
  \end{block}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2338
\end{columns}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2339
\end{frame}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2340
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2341
\begin{frame}[fragile] \frametitle{Polar}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2342
  \begin{columns}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2343
    \column{0.5\textwidth}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2344
    \hspace*{-0.5in}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2345
  \includegraphics[height=2in, interpolate=true]{data/polar}  
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2346
    \column{0.45\textwidth}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2347
    \begin{block}{Example code}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2348
    \tiny
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2349
\begin{lstlisting}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2350
figure(figsize=(8,8))
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2351
ax = axes([0.1, 0.1, 0.8, 0.8], polar=True, 
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2352
          axisbg='#d5de9c')
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2353
r = arange(0,1,0.001)
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2354
theta = 2*2*pi*r
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2355
polar(theta, r, color='#ee8d18', lw=3)
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2356
# the radius of the grid labels
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2357
setp(ax.thetagridlabels, y=1.075) 
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2358
title(r"$\theta=4\pi r", fontsize=20)
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2359
\end{lstlisting}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2360
  \end{block}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2361
\end{columns}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2362
\end{frame}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2363
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2364
\begin{frame}[fragile] \frametitle{Contours}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2365
  \begin{columns}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2366
    \column{0.45\textwidth}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2367
    \hspace*{-0.5in}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2368
  \includegraphics[height=2in, interpolate=true]{data/contour}  
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2369
    \column{0.525\textwidth}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2370
    \begin{block}{Example code}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2371
    \tiny
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2372
\begin{lstlisting}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2373
x = arange(-3.0, 3.0, 0.025)
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2374
y = arange(-2.0, 2.0, 0.025)
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2375
X, Y = meshgrid(x, y)
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2376
Z1 = bivariate_normal(X, Y, 1.0, 1.0, 0.0, 0.0)
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2377
Z2 = bivariate_normal(X, Y, 1.5, 0.5, 1, 1)
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2378
# difference of Gaussians
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2379
Z = 10.0 * (Z2 - Z1)
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2380
im = imshow(Z, interpolation='bilinear', 
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2381
            origin='lower',
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2382
            cmap=cm.gray, extent=(-3,3,-2,2))
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2383
levels = arange(-1.2, 1.6, 0.2)
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2384
# label every second level
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2385
clabel(CS, levels[1::2],  inline=1,
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2386
       fmt='%1.1f', fontsize=14)
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2387
CS = contour(Z, levels,
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2388
             origin='lower',
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2389
             linewidths=2,
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2390
             extent=(-3,3,-2,2))
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2391
# make a colorbar for the contour lines
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2392
CB = colorbar(CS, shrink=0.8, extend='both')
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2393
title('Lines with colorbar')
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2394
hot(); flag()
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2395
\end{lstlisting}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2396
  \end{block}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2397
\end{columns}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2398
\end{frame}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2399
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2400
\begin{frame}[fragile] \frametitle{Velocity vectors}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2401
  \begin{columns}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2402
    \column{0.5\textwidth}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2403
    \hspace*{-0.5in}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2404
  \includegraphics[height=2in, interpolate=true]{data/quiver}  
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2405
    \column{0.45\textwidth}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2406
    \begin{block}{Example code}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2407
    \tiny
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2408
\begin{lstlisting}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2409
X,Y = meshgrid(arange(0,2*pi,.2),
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2410
               arange(0,2*pi,.2) )
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2411
U = cos(X)
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2412
V = sin(Y)
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2413
Q = quiver(X[::3, ::3], Y[::3, ::3], 
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2414
           U[::3, ::3], V[::3, ::3],
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2415
           color='r', units='x', 
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2416
           linewidths=(2,), 
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2417
           edgecolors=('k'), 
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2418
           headaxislength=5 )
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2419
qk = quiverkey(Q, 0.5, 0.03, 1, '1 m/s', 
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2420
               fontproperties=
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2421
               {'weight': 'bold'})
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2422
axis([-1, 7, -1, 7])
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2423
title('triangular head; scale '\
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2424
      'with x view; black edges')
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2425
\end{lstlisting}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2426
  \end{block}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2427
\end{columns}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2428
\end{frame}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2429
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2430
\begin{frame}[fragile] \frametitle{Maps}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2431
  \includegraphics[height=2.5in, interpolate=true]{data/plotmap}  
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2432
  \begin{center}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2433
    \tiny
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2434
    For details see \url{http://matplotlib.sourceforge.net/screenshots/plotmap.py}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2435
  \end{center}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2436
\end{frame}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2437
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2438
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2439
\subsection{SciPy}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2440
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2441
\begin{frame}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2442
  \frametitle{Using \texttt{SciPy}}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2443
  \begin{itemize}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2444
  \item SciPy is Open Source software for mathematics, science, and
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2445
    engineering
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2446
  \item \typ{import scipy}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2447
  \item Built on NumPy
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2448
  \item Provides modules for statistics, optimization, integration,
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2449
    linear algebra, Fourier transforms, signal and image processing,
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2450
    genetic algorithms, ODE solvers, special functions, and more
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2451
  \item Used widely by scientists world over
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2452
  \item Details are beyond the scope of this tutorial
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2453
  \end{itemize}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2454
\end{frame}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2455
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2456
\section{Standard library}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2457
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2458
\subsection{Quick Tour}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2459
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2460
\begin{frame}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2461
  \frametitle{Standard library}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2462
  \begin{itemize}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2463
  \item Very powerful
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2464
  \item ``Batteries included''
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2465
  \item Example standard modules taken from the tutorial
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2466
    \begin{itemize}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2467
    \item Operating system interface: \typ{os}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2468
    \item System, Command line arguments: \typ{sys}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2469
    \item Regular expressions: \typ{re}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2470
    \item Math: \typ{math}, \typ{random}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2471
    \item Internet access: \typ{urllib2}, \typ{smtplib}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2472
    \item Data compression: \typ{zlib}, \typ{gzip}, \typ{bz2},
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2473
      \typ{zipfile}, and \typ{tarfile}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2474
    \item Unit testing: \typ{doctest} and \typ{unittest}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2475
    \item And a whole lot more!
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2476
    \end{itemize}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2477
  \item Check out the Python Library reference:
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2478
    \url{http://docs.python.org/lib/lib.html}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2479
  \end{itemize}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2480
\end{frame}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2481
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2482
\begin{frame}[fragile]
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2483
  \frametitle{Stdlib: examples}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2484
\begin{lstlisting}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2485
>>> import os
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2486
>>> os.system('date')
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2487
Fri Jun 10 22:13:09 IST 2005
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2488
0
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2489
>>> os.getcwd()
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2490
'/home/prabhu'
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2491
>>> os.chdir('/tmp')
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2492
>>> import os
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2493
>>> dir(os)
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2494
<returns a list of all module functions>
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2495
>>> help(os)
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2496
<extensive manual page from module's docstrings>
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2497
\end{lstlisting}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2498
\end{frame}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2499
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2500
\begin{frame}[fragile]
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2501
  \frametitle{Stdlib: examples}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2502
\begin{lstlisting}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2503
>>> import sys
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2504
>>> # Print the list of command line args to Python
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2505
... print sys.argv 
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2506
['']
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2507
>>> import re # Regular expressions
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2508
>>> re.findall(r'\bf[a-z]*', 
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2509
... 'which foot or hand fell fastest')
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2510
['foot', 'fell', 'fastest']
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2511
>>> re.sub(r'(\b[a-z]+) \1', r'\1', 
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2512
... 'cat in the the hat')
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2513
'cat in the hat'
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2514
\end{lstlisting}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2515
\end{frame}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2516
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2517
\begin{frame}[fragile]
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2518
  \frametitle{Stdlib: examples}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2519
\begin{lstlisting}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2520
>>> import math
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2521
>>> math.cos(math.pi / 4.0)
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2522
0.70710678118654757
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2523
>>> math.log(1024, 2)
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2524
10.0
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2525
>>> import random
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2526
>>> random.choice(['apple', 'pear', 'banana'])
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2527
'pear'
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2528
\end{lstlisting}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2529
\end{frame}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2530
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2531
\begin{frame}[fragile]
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2532
  \frametitle{Stdlib: examples}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2533
\begin{lstlisting}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2534
>>> import urllib2
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2535
>>> f = urllib2.urlopen('http://www.python.org/')
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2536
>>> print f.read(100)
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2537
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2538
<?xml-stylesheet href="./css/ht2html
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2539
\end{lstlisting}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2540
\end{frame}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2541
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2542
\begin{frame}[fragile]
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2543
  \frametitle{Stdlib: examples}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2544
\begin{lstlisting}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2545
>>> import zlib
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2546
>>> s = 'witch which has which witches wrist watch'
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2547
>>> len(s)
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2548
41
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2549
>>> t = zlib.compress(s)
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2550
>>> len(t)
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2551
37
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2552
>>> zlib.decompress(t)
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2553
'witch which has which witches wrist watch'
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2554
>>> zlib.crc32(t)
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2555
-1438085031
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2556
\end{lstlisting}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2557
\end{frame}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2558
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2559
\begin{frame}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2560
  \frametitle{Summary}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2561
  \begin{itemize}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2562
  \item Introduced Python
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2563
  \item Basic syntax
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2564
  \item Basic types and data structures
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2565
  \item Control flow
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2566
  \item Functions
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2567
  \item Modules
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2568
  \item Exceptions
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2569
  \item Classes
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2570
  \item Standard library
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2571
  \end{itemize}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2572
\end{frame}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2573
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2574
\end{document}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2575
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2576
\subsection{Basic data structures}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2577
\begin{frame}{Lists}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2578
  \begin{itemize}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2579
    \item \texttt{species = [ 'humans', 'orcs', 'elves', 'dwarves' ]}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2580
    \item \texttt{ ids = [ 107, 109, 124, 141, 142, 144 ]}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2581
    \item \texttt{ oneliners = [ 'I will be back', 'Do or do not! No try!!', 42 ] }
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2582
  \end{itemize}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2583
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2584
  \begin{block}{List operations}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2585
    ids + [ 100, 102 ]\\
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2586
    species.append( 'unicorns')\\
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2587
    print oneliners[ 1 ]\\
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2588
    look up \alert{docs.python.org/tutorial/datastructures.html}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2589
  \end{block}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2590
\end{frame}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2591
\end{document}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2592
\section{Python Tutorial}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2593
\subsection{Preliminaries}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2594
\begin{frame}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2595
  \frametitle{Using the interpreter}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2596
  \begin{itemize}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2597
  \item Starting up: \typ{python} or \typ{ipython}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2598
  \item Quitting: \typ{Control-D} or \typ{Control-Z} (on Win32)
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2599
  \item Can use it like a calculator
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2600
  \item Can execute one-liners via the \typ{-c} option:
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2601
    \typ{python -c "print 'hello world'"}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2602
  \item Other options via \typ{python -h}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2603
  \end{itemize}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2604
\end{frame}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2605
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2606
\begin{frame}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2607
  \frametitle{IPython}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2608
  \begin{itemize}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2609
  \item Recommended interpreter, IPython:
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2610
    \url{http://ipython.scipy.org}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2611
  \item Better than the default Python shell
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2612
  \item Supports tab completion by default
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2613
  \item Easier object introspection
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2614
  \item Shell access!
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2615
  \item Command system to allow extending its own behavior
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2616
  \item Supports history (across sessions) and logging
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2617
  \item Can be embedded in your own Python code
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2618
  \item Support for macros
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2619
  \item A flexible framework for your own custom interpreter
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2620
  \item Other miscellaneous conveniences
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2621
  \item We'll get back to this later
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2622
  \end{itemize}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2623
\end{frame}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2624
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2625
\begin{frame}[fragile]
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2626
  \frametitle{Basic IPython features}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2627
  \begin{itemize}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2628
  \item Startup: \verb+ipython [options] files+
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2629
    \begin{itemize}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2630
    \item \verb+ipython [-wthread|-gthread|-qthread]+:
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2631
      Threading modes to support wxPython, pyGTK and Qt
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2632
    \item \verb+ipython -pylab+: Support for matplotlib
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2633
    \end{itemize}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2634
  \item TAB completion:
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2635
    \begin{itemize}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2636
    \item Type \verb+object_name.<TAB>+ to see list of options
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2637
    \item Also completes on file and directory names
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2638
    \end{itemize}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2639
  \item \verb+object?+ shows docstring/help for any Python object
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2640
  \item \verb+object??+ presents more docs (and source if possible)
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2641
  \item Debugging with \verb+%pdb+ magic: pops up pdb on errors
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2642
  \item Access history (saved over earlier sessions also)
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2643
    \begin{itemize}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2644
    \item Use \texttt{<UpArrow>}: move up history
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2645
    \item Use \texttt{<Ctrl-r> string}: search history backwards
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2646
    \item Use \texttt{Esc >}: get back to end of history
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2647
    \end{itemize}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2648
  \item \verb+%run [options] file[.py]+ lets you run Python code
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2649
  \end{itemize}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2650
\end{frame}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2651
% LocalWords:  BDFL Guido Rossum PSF Nokia OO Zope CMS RedHat SciPy MayaVi spam
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2652
% LocalWords:  IPython ipython stdin TypeError dict int elif PYTHONPATH IOError
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2653
% LocalWords:  namespace Namespaces SyntaxError ZeroDivisionError NameError str
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2654
% LocalWords:  ValueError subclassed def
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2655
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2656
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2657
  \item Types are of two kinds: \alert{mutable} and \alert{immutable}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2658
  \item Immutable types: numbers, strings, \typ{None} and tuples
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2659
  \item Immutables cannot be changed ``in-place''
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2660
  \item Mutable types: lists, dictionaries, instances, etc.
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2661
  \item Mutable objects can be ``changed''
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2662
  \end{itemize}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2663
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2664
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2665
\begin{frame}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2666
  \frametitle{Important!}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2667
  \begin{itemize}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2668
    \item Assignment to an object is by reference
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2669
    \item Essentially, \alert{names are bound to objects}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2670
  \end{itemize}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2671
\end{frame}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2672
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2673
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2674
\end{document}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2675
\begin{frame}[fragile]
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2676
  \frametitle{Dictionaries}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2677
  \begin{itemize}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2678
  \item Associative arrays/mappings
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2679
  \item Indexed by ``keys'' (keys must be immutable)
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2680
  \item \typ{dict[key] = value}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2681
  \item \typ{keys()} returns all keys of the dict
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2682
  \item \typ{values()} returns the values of the dict
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2683
  \item \verb+has_key(key)+ returns if \typ{key} is in the dict
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2684
  \end{itemize}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2685
\end{frame}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2686
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2687
\begin{frame}[fragile]
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2688
  \frametitle{Dictionaries: example}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2689
  \begin{lstlisting}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2690
>>> tel = {'jack': 4098, 'sape': 4139}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2691
>>> tel['guido'] = 4127
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2692
>>> tel
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2693
{'sape': 4139, 'guido': 4127, 'jack': 4098}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2694
>>> tel['jack']
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2695
4098
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2696
>>> del tel['sape']
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2697
>>> tel['irv'] = 4127
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2698
>>> tel
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2699
{'guido': 4127, 'irv': 4127, 'jack': 4098}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2700
>>> tel.keys()
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2701
['guido', 'irv', 'jack']
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2702
>>> tel.has_key('guido')
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2703
True
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2704
  \end{lstlisting}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2705
\end{frame}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2706
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2707
\subsection{Control flow, functions}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2708
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2709
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2710
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2711
\begin{frame}[fragile]
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2712
  \frametitle{\typ{If} example}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2713
  \begin{lstlisting}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2714
>>> a = ['cat', 'window', 'defenestrate']
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2715
>>> if 'cat' in a:
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2716
...    print "meaw"
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2717
...
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2718
meaw
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2719
>>> pets = {'cat': 1, 'dog':2, 'croc': 10}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2720
>>> if 'croc' in pets:
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2721
...    print pets['croc']
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2722
...
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2723
10
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2724
  \end{lstlisting}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2725
\end{frame}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2726
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2727
\begin{frame}[fragile]
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2728
  \frametitle{\typ{for} example}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2729
  \begin{lstlisting}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2730
>>> a = ['cat', 'window', 'defenestrate']
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2731
>>> for x in a:
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2732
...     print x, len(x)
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2733
...
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2734
cat 3
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2735
window 6
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2736
defenestrate 12
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2737
>>> knights = {'gallahad': 'the pure', 
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2738
... 'robin': 'the brave'}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2739
>>> for k, v in knights.iteritems():
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2740
...     print k, v
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2741
...
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2742
gallahad the pure
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2743
robin the brave
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2744
\end{lstlisting}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
  2745
\end{frame}