day1/Session-1.tex
author Santosh G. Vattam <vattam.santosh@gmail.com>
Tue, 06 Oct 2009 18:43:15 +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[] {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, 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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\section{Agenda}
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\begin{frame}{About the Workshop}
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  \begin{block}{Goal of the workshop}
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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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  \begin{block}{Workshop Audience}
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        Aimed at Engg., Mathematics and Science teachers  but should serve a similar purpose for others. 
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  \end{block}
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  \begin{block}{Focus of the workshop}
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        Focus on basic numerics and plotting
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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}{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 December 1989
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  \item ``Python'' as in 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
95fdc10975d5 Session 1 slides cleaned up. Waiting for review.
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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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parents:
diff changeset
   364
  \end{itemize}
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parents:
diff changeset
   365
  \inctime{15}
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parents:
diff changeset
   366
\end{frame}
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parents:
diff changeset
   367
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diff changeset
   368
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
24
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parents: 5
diff changeset
   369
% TIME: 10 m, running 20m
5
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parents:
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   370
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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parents:
diff changeset
   371
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   372
\subsection{Data types}
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parents:
diff changeset
   373
\begin{frame}
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parents:
diff changeset
   374
  \frametitle{Basic types}
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Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   375
  \begin{itemize}
24
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parents: 5
diff changeset
   376
    \item Numbers: float, int, long, complex
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Santosh G. Vattam <vattam.santosh@gmail.com>
parents: 5
diff changeset
   377
    \item Strings
95fdc10975d5 Session 1 slides cleaned up. Waiting for review.
Santosh G. Vattam <vattam.santosh@gmail.com>
parents: 5
diff changeset
   378
    \item Boolean
5
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parents:
diff changeset
   379
  \end{itemize}
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Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   380
  \begin{block}{Also to be discussed later}
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Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   381
    tuples, lists, dictionaries, functions, objects\ldots
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Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   382
  \end{block}
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parents:
diff changeset
   383
\end{frame}
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parents:
diff changeset
   384
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   385
\begin{frame}[fragile]
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Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   386
  \frametitle{Numbers}
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Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   387
  \vspace*{-0.25in}
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Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   388
  \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
   389
>>> 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
   390
>>> 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
   391
>>> 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
   392
>>> 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
   393
>>> 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
   394
>>> 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
   395
(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
   396
>>> 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
   397
1.0 1.0
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Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   398
>>> 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
   399
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
   400
>>> 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
   401
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
   402
  \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
   403
\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
   404
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   405
\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
   406
  \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
   407
  \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
   408
>>> 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
   409
>>> 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
   410
False
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   411
>>> 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
   412
True
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   413
>>> 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
   414
False
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   415
  \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
   416
  \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
   417
  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
   418
  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
   419
  \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
   420
\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
   421
24
95fdc10975d5 Session 1 slides cleaned up. Waiting for review.
Santosh G. Vattam <vattam.santosh@gmail.com>
parents: 5
diff changeset
   422
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
95fdc10975d5 Session 1 slides cleaned up. Waiting for review.
Santosh G. Vattam <vattam.santosh@gmail.com>
parents: 5
diff changeset
   423
% 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
   424
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
95fdc10975d5 Session 1 slides cleaned up. Waiting for review.
Santosh G. Vattam <vattam.santosh@gmail.com>
parents: 5
diff changeset
   425
5
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   426
\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
   427
  \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
   428
  \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
   429
>>> 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
   430
>>> 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
   431
False
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   432
>>> 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
   433
True
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   434
>>> 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
   435
True
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   436
>>> 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
   437
True
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   438
>>> 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
   439
True
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{lstlisting}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   441
\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
   442
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   443
\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
   444
  \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
   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
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
   447
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
   448
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
   449
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
   450
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
   451
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
   452
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
   453
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
   454
"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
   455
  \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
   456
\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
   457
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   458
\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
   459
  \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
   460
  \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
   461
  \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
   462
>>> 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
   463
>>> 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
   464
hlo
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   465
>>> 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
   466
5
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   467
>>> 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
   468
>>> # 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
   469
... 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
   470
  \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
   471
\pause
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{lstlisting}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   473
>>> 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
   474
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
   475
  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
   476
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
   477
  \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
   478
\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
   479
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   480
\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
   481
  \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
   482
  Why?
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   483
  \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
   484
    {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
   485
    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
   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
    .?\\
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   488
    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
   489
  \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
   490
\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
   491
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{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
   493
  \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
   494
  \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
   495
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
   496
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
   497
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
   498
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
   499
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
   500
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
   501
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
   502
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
   503
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
   504
  \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
   505
\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
   506
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{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
   508
  \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
   509
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
   510
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
   511
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
   512
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
   513
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
   514
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
   515
  \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
   516
  \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
   517
    \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
   518
    \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
   519
  \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
   520
\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
   521
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{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
   523
  \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
   524
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
   525
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
   526
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
   527
  \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
   528
  \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
   529
    \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
   530
    \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
   531
  \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
   532
  \small
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   533
\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
   534
\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
   535
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{frame}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   537
  {Interlude}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   538
  \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
   539
    {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
   540
    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
   541
  \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
   542
  \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
   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
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   546
% 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
   547
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   548
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   549
\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
   550
\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
   551
  \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
   552
  \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
   553
  \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
   554
  \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
   555
  \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
   556
  \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
   557
  \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
   558
  \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
   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}[fragile]
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   562
  \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
   563
  \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
   564
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
   565
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
   566
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
   567
   ....:    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
   568
   ....: else:
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   569
   ....:     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
   570
   ....:
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   571
   ....:
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   572
World
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   573
  \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
   574
  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
   575
\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
   576
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   577
\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
   578
  {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
   579
  \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
   580
    \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
   581
    \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
   582
    \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
   583
    \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
   584
    \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
   585
    \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
   586
  \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
   587
\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
   588
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{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
   590
  \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
   591
\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
   592
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
   593
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
   594
     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
   595
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
   596
     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
   597
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
   598
     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
   599
else:
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   600
     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
   601
\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
   602
\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
   603
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   604
\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
   605
  \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
   606
    {Console Input}
24
95fdc10975d5 Session 1 slides cleaned up. Waiting for review.
Santosh G. Vattam <vattam.santosh@gmail.com>
parents: 5
diff changeset
   607
    \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
   608
    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
   609
  \end{block}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
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   610
  \begin{block}
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   611
    {Console output}
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   612
    \texttt{print} is straight forward. Major point to remember is the distinction between \texttt{print x} and \texttt{print x,}
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parents:
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   613
  \end{block}
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   614
\end{frame}
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
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parents:
diff changeset
   615
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
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parents:
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   616
\begin{frame}[fragile]
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   617
  \frametitle{Basic looping}
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parents:
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   618
  \begin{lstlisting}
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parents:
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   619
# Fibonacci series:
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   620
# the sum of two elements
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   621
# defines the next
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   622
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:
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   623
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
   624
    print b,
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents:
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   625
    a, b = b, a + b
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Madhusudan.C.S <madhusudancs@gmail.com>
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   626
 
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
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   627
\end{lstlisting}
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parents:
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   628
\typ{1 1 2 3 5 8}\\  
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
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parents:
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   629
\alert{Recall it is easy to write infinite loops with \kwrd{while}}
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Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   630
  \inctime{20}
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Madhusudan.C.S <madhusudancs@gmail.com>
parents:
diff changeset
   631
\end{frame}
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parents:
diff changeset
   632
838cedef5e9d Added 4 tex slides for 4 sessions of Day 1 of the workshop.
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parents:
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   633
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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parents:
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   634
% TIME: 20 m, running 80m 
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parents:
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   635
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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diff changeset
   636
\end{document}