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−%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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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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−
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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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−
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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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−
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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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−
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−\definecolor{darkgreen}{rgb}{0,0.5,0}
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−
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−\usepackage{listings}
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−\lstset{language=Python,
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−    basicstyle=\ttfamily\bfseries,
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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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−%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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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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−
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−\newcommand{\typ}[1]{\texttt{#1}}
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−
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−\newcommand{\kwrd}[1]{ \texttt{\textbf{\color{blue}{#1}}}  }
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−
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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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−
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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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−numerics and plotting}
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−
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−\author[Asokan \& Prabhu] {Asokan Pichai\\Prabhu Ramachandran}
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−
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−\institute[IIT Bombay] {Department of Aerospace Engineering\\IIT Bombay}
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−\date[] {26, July 2009}
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−%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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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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−
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−
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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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−
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−\AtBeginSection[]
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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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−
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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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−
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−%\includeonlyframes{current,current1,current2,current3,current4,current5,current6}
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−
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−%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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−% DOCUMENT STARTS
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−\begin{document}
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−
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−\begin{frame}
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−  \frametitle{Outline}
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−  \tableofcontents
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−\end{frame}
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−\section{Pythonicity}
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−\begin{frame}[fragile]
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−    \frametitle{The Zen of Python}
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−
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−Try this!
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−
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−\begin{lstlisting}
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−>>> import this
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−\end{lstlisting}
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−
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−\end{frame}
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−
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−\begin{frame}
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−    {Style Guide}
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−    
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−    Read PEP8
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−
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−    \url{http://www.python.org/dev/peps/pep-0008/}
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−
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−    \inctime{10}
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−\end{frame}
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−\section{More Python Machinery}
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−\subsection{Objects}
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−\begin{frame}{Objects in Python}
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−    \begin{itemize}
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−        \item What is an Object? (Types and classes)
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−        \item identity
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−        \item type
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−        \item method
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−      \end{itemize}
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−\end{frame}
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−
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−\begin{frame}[fragile]
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−  \frametitle{Why are they useful?}
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−  \small
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−  \begin{lstlisting}
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−for element in (1, 2, 3):
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−    print element
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−for key in {'one':1, 'two':2}:
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−    print key
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−for char in "123":
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−    print char
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−for line in open("myfile.txt"):
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−    print line
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−for line in urllib2.urlopen('http://site.com'):
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−    print line
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−  \end{lstlisting}
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−\end{frame}
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−\begin{frame}{And the winner is \ldots OBJECTS!}
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−  All objects providing a similar inteface can be used the same way.\\
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−  Functions (and others) are first-class objects. Can be passed to and returned from functions.
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−  \inctime{10}
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−\end{frame}
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−\subsection{Dictionary}
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−\begin{frame}{Dictionary}
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−  \begin{itemize}
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−    \item aka associative arrays, key-value pairs, hashmaps, hashtables \ldots    
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−    \item \typ{ d = \{ ``Hitchhiker's guide'' : 42, ``Terminator'' : ``I'll be back''\}}
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−    \item lists and tuples index: 0 \ldots n
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−    \item dictionaries index using strings
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−    \item aka key-value pairs
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−    \item what can be keys?
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−  \end{itemize}
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−\end{frame}
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−    
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−\begin{frame}{Dict \ldots }
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−  \begin{itemize}
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−    \item \alert{Unordered}
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−      \begin{block}{Standard usage}
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−        for key in dict:\\
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−            <use> dict[key] \# => value
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−      \end{block}
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−    \item \typ{d.keys()} returns a list
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−    \item can we have duplicate keys?
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−  \end{itemize}
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−\end{frame}
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−\begin{frame} {Problem Set 2.1}
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−  \begin{description}
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−\item[2.1.1] You are given date strings of the form ``29, Jul 2009'', or ``4 January 2008''. In other words a number a string and another number, with a comma sometimes separating the items.Write a function that takes such a string and returns a tuple (yyyy, mm, dd) where all three elements are ints.
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−    \item[2.1.2] Count word frequencies in a file.
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−    \item[2.1.3] Find the most used Python keywords in your Python code (import keyword).
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−\end{description}
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−
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−\inctime{20}
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−\end{frame}
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−
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−\subsection{Set}
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−\begin{frame}[fragile]
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−  \frametitle{Set}
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−    \begin{itemize}
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−      \item Simplest container, mutable
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−      \item No ordering, no duplicates
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−      \item usual suspects: union, intersection, subset \ldots
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−      \item >, >=, <, <=, in, \ldots
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−    \end{itemize}
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−    \begin{lstlisting}
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−f10 = set([1,2,3,5,8])
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−p10 = set([2,3,5,7])
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−f10|p10, f10&p10
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−f10-p10, p10-f10, f10^p10
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−set([2,3]) < p10, set([2,3]) <= p10
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−2 in p10, 4 in p10
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−len(f10)
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−\end{lstlisting}
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−\end{frame}
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−
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−\begin{frame}
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−  \frametitle{Problem set 2.2}
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−  \begin{description}
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−    \item[2.2.1] Given a dictionary of the names of students and their marks, identify how many duplicate marks are there? and what are these?
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−    \item[2.2.2] Given a string of the form ``4-7, 9, 12, 15'' find the numbers missing in this list for a given range.
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−\end{description}
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−\inctime{15}
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−\end{frame}
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−
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−\subsection{Functions Reloaded!}
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−\begin{frame}[fragile]
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−    \frametitle{Advanced functions}
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−    \begin{itemize}
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−        \item default args
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−        \item varargs
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−        \item keyword args
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−        \item scope
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−        \item \typ{global}
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−      \end{itemize}
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−\end{frame}
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−
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−\begin{frame}[fragile]
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−  \frametitle{Functions: default arguments}
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−  \begin{lstlisting}
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−def ask_ok(prompt, retries=4, complaint='Yes or no!'):
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−    while True:
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−        ok = raw_input(prompt)
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−        if ok in ('y', 'ye', 'yes'): 
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−            return True
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−        if ok in ('n', 'no', 'nop', 'nope'): 
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−            return False
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−        retries = retries - 1
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−        if retries < 0: 
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−            raise IOError, 'bad user'
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−        print complaint
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−  \end{lstlisting}
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−\end{frame}
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−
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−\begin{frame}[fragile]
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−  \frametitle{Functions: keyword arguments}
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−  \small
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−  \begin{lstlisting}
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−def parrot(voltage, state='a stiff', 
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−           action='voom', type='Royal Blue'):
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−    print "-- This parrot wouldn't", action,
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−    print "if you supply", voltage, "Volts."
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−    print "-- Lovely plumage, the", type
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−    print "-- It's", state, "!"
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−
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−parrot(1000)
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−parrot(action = 'VOOOOOM', voltage = 1000000)
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−parrot('a thousand', state = 'pushing up the daisies')
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−parrot('a million', 'bereft of life', 'jump')
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−\end{lstlisting}
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−\end{frame}
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−
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−\begin{frame}[fragile]
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−  \frametitle{Functions: arbitrary argument lists}
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−  \begin{itemize}
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−  \item Arbitrary number of arguments using \verb+*args+ or
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−    \verb+*whatever+
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−  \item Keyword arguments using \verb+**kw+
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−  \item Given a tuple/dict how do you call a function?
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−    \begin{itemize}
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−    \item Using argument unpacking
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−    \item For positional arguments: \verb+foo(*[5, 10])+
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−    \item For keyword args: \verb+foo(**{'a':5, 'b':10})+
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−    \end{itemize}
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−  \end{itemize}
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−\end{frame}
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−
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−  \begin{frame}[fragile]
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−\begin{lstlisting}
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−def foo(a=10, b=100):
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−    print a, b
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−def func(*args, **keyword):
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−    print args, keyword
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−# Unpacking:
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−args = [5, 10]
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−foo(*args)
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−kw = {'a':5, 'b':10}
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−foo(**kw)
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−\end{lstlisting}
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−    \inctime{15} 
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−\end{frame}
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−
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−\subsection{Functional programming}
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−\begin{frame}[fragile]
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−    \frametitle{Functional programming}
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−What is the basic idea?\\
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−Why is it interesting?\\
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−\typ{map, reduce, filter}\\
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−list comprehension\\
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−generators
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−    \inctime{10} 
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−\end{frame}
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−\end{document}
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−
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−%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%