day1/Session-1.tex
author Santosh G. Vattam <vattam.santosh@gmail.com>
Wed, 07 Oct 2009 00:50:06 +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) 2005-2009, Prabhu Ramachandran
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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[FOSSEE Team] {Asokan Pichai\\Prabhu Ramachandran}
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\institute[IIT Bombay] {Department of Aerospace Engineering\\IIT Bombay}
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\date[] {Day 1, Session-1, 10, October 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[Day 1, Session 1] Sat 09:30--11:00
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	\item[Day 1, Session 2] Sat 11:15--12:45
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	\item[Day 1, Session 3] Sat 13:45--15:15
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	\item[Day 1, Session 4] Sat 15:30--17:00
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        \item[Day 2, Quiz] Sun 09:00--09:30
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        \item[Day 2, Session 1] Sun 09:30--11:00
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	\item[Day 2, Session 2] Sun 11:15--12:45
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	\item[Day 2, Session 3] Sun 13:45--15:15
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	\item[Day 2, Session 4] Sun 15:30--17:00
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  \end{description}
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\end{frame}
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\begin{frame}{About the Workshop}
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  \begin{block}{Intended Audience}
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       \item Aimed at Engg., Mathematics and Science teachers.
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       \item Interested students from similar streams.
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  \end{block}  
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  \begin{block}{Goal}
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	Successful participants will be able to use python as their scripting and problem solving language. 
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  \end{block}
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\end{frame}
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\begin{frame}{Checklist}
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	\begin{block}{python}
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          Type python at the command line. Do you see version 2.5 or later?
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        \end{block}
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        \begin{block}{IPython}
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          Is IPython available?
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        \end{block}
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        \begin{block}{Editor}
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          Which editor? scite, vim, emacs, \ldots
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        \end{block}
5
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\end{frame}
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\section{Overview}
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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 December 1989
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  \item ``Python'' as in \it Monty Python's Flying Circus
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  \item 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 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 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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%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
24
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% TIME: 10 m, running 10m
5
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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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%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
24
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% TIME: 10 m, running 20m
5
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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
5
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  \end{itemize}
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   364
  \begin{block}{Also to be discussed later}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   365
    tuples, lists, dictionaries, functions, objects\ldots
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parents:
diff changeset
   366
  \end{block}
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parents:
diff changeset
   367
\end{frame}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
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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]
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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.
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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
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Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   376
>>> f = 3.14159 # float
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Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   377
>>> c = 1+1j # Complex!
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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
24
95fdc10975d5 Session 1 slides cleaned up. Waiting for review.
Santosh G. Vattam <vattam.santosh@gmail.com>
parents: 5
diff changeset
   406
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
95fdc10975d5 Session 1 slides cleaned up. Waiting for review.
Santosh G. Vattam <vattam.santosh@gmail.com>
parents: 5
diff changeset
   407
% TIME: 10 m, running 30m
95fdc10975d5 Session 1 slides cleaned up. Waiting for review.
Santosh G. Vattam <vattam.santosh@gmail.com>
parents: 5
diff changeset
   408
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
95fdc10975d5 Session 1 slides cleaned up. Waiting for review.
Santosh G. Vattam <vattam.santosh@gmail.com>
parents: 5
diff changeset
   409
5
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   410
\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
   411
  \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
   412
  \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
   413
>>> 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
   414
>>> 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
   415
False
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 
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
>>> 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
   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
>>> 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
   421
True
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   422
>>> 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
   423
True
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   424
  \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
   425
\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
   426
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   427
\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
   428
  \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
   429
  \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
   430
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
   431
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
   432
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
   433
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
   434
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
   435
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
   436
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
   437
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
   438
"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
   439
  \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
   440
\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
   441
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   442
\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
   443
  \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
   444
  \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
   445
  \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
   446
>>> 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
   447
>>> 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
   448
hlo
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   449
>>> 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
   450
5
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   451
>>> 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
   452
>>> # 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
   453
... 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
   454
  \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
   455
\pause
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   456
  \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
   457
>>> 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
   458
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
   459
  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
   460
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
   461
  \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
   462
\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
   463
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   464
\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
   465
  \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
   466
  Why?
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   467
  \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
   468
    {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
   469
    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
   470
    ?\\
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
    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
   473
  \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
   474
\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
   475
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   476
\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
   477
  \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
   478
  \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
   479
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
   480
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
   481
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
   482
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
   483
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
   484
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
   485
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
   486
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
   487
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
   488
  \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
   489
\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
   490
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   491
\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
   492
  \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
   493
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
   494
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
   495
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
   496
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
   497
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
   498
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
   499
  \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
   500
  \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
   501
    \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
   502
    \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
   503
  \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
   504
\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
   505
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   506
\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
   507
  \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
   508
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
   509
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
   510
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
   511
  \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
   512
  \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
   513
    \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
   514
    \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
   515
  \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
   516
  \small
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   517
\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
   518
\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
   519
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   520
\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
   521
  {Interlude}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   522
  \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
   523
    {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
   524
    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
   525
  \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
   526
  \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
   527
\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
   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
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   530
% 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
   531
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   532
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   533
\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
   534
\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
   535
  \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
   536
  \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
   537
  \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
   538
  \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
   539
  \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
   540
  \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
   541
  \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
   542
  \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
   543
\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
   544
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   545
\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
   546
  \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
   547
  \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
   548
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
   549
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
   550
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
   551
   ....:    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
   552
   ....: else:
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   553
   ....:     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
   554
   ....:
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   555
   ....:
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   556
World
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   557
  \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
   558
  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
   559
\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
   560
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   561
\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
   562
  {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
   563
  \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
   564
    \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
   565
    \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
   566
    \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
   567
    \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
   568
    \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
   569
    \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
   570
  \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
   571
\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
   572
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   573
\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
   574
  \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
   575
\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
   576
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
   577
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
   578
     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
   579
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
   580
     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
   581
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
   582
     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
   583
else:
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   584
     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
   585
\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
   586
\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
   587
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   588
\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
   589
  \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
   590
    {Console Input}
24
95fdc10975d5 Session 1 slides cleaned up. Waiting for review.
Santosh G. Vattam <vattam.santosh@gmail.com>
parents: 5
diff changeset
   591
    \texttt{raw\_input()} waits for user input.\\Prompt string is optional.\\
5
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   592
    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
   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
  \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
   595
    {Console output}
47
21de307e6823 Updated session 1 slides.
Santosh G. Vattam <vattam.santosh@gmail.com>
parents: 42
diff changeset
   596
    \texttt{print} is straight forward. Note the distinction between \texttt{print x} and \texttt{print x,}
5
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   597
  \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
   598
\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
   599
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   600
\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
   601
  \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
   602
  \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
   603
# 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
   604
# 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
   605
# 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
   606
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
   607
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
   608
    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
   609
    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
   610
 
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parents:
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\end{lstlisting}
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parents:
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\typ{1 1 2 3 5 8}\\  
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parents:
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\alert{Recall it is easy to write infinite loops with \kwrd{while}}
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parents:
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   614
  \inctime{20}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
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\end{frame}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
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parents:
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%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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parents:
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   618
% TIME: 20 m, running 80m 
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parents:
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%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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parents:
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\end{document}