day2/session4.tex
author Christopher Burns <chris.d.burns@gmail.com>
Tue, 29 Jun 2010 01:40:24 -0500
branchscipy2010
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permissions -rw-r--r--
DOC: More slides on whitespace.
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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) 2005-2009, Prabhu Ramachandran
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%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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\documentclass[compress,14pt]{beamer}
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% \documentclass[handout]{beamer}
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% \usepackage{pgfpages}
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% \pgfpagesuselayout{4 on 1}[a4paper,border, shrink=5mm,landscape]
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\usepackage{tikz}
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\newcommand{\hyperlinkmovie}{}
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%\usepackage{movie15}
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%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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% Note that in presentation mode 
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% \paperwidth  364.19536pt
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% \paperheight 273.14662pt
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% h/w = 0.888
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\mode<presentation>
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{
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  \usetheme{Warsaw}
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  %\usetheme{Boadilla}
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  %\usetheme{default}
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  \useoutertheme{infolines}
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  \setbeamercovered{transparent}
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}
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% To remove navigation symbols
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\setbeamertemplate{navigation symbols}{}
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\usepackage{amsmath}
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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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\usepackage{pgf}
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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\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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% My Macros
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\setbeamercolor{postit}{bg=yellow,fg=black}
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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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%{\centerline{\fcolorbox{gray!50} {blue!10}{
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%\begin{minipage}{0.9\linewidth}
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%    {#1} 
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%\end{minipage}
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%    }}}
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\newcommand{\myemph}[1]{\structure{\emph{#1}}}
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\newcommand{\PythonCode}[1]{\lstinline{#1}}
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\newcommand{\tvtk}{\texttt{tvtk}}
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\newcommand{\mlab}{\texttt{mlab}}
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\newcommand{\typ}[1]{\lstinline{#1}}
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\newcounter{time}
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\setcounter{time}{0}
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\newcommand{\inctime}[1]{\addtocounter{time}{#1}{\vspace*{0.1in}\tiny \thetime\ m}}
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\newcommand\BackgroundPicture[1]{%
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  \setbeamertemplate{background}{%
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      \parbox[c][\paperheight]{\paperwidth}{%
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      \vfill \hfill
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 \hfill \vfill
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}}}
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%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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% Configuring the theme
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%\setbeamercolor{normal text}{fg=white}
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%\setbeamercolor{background canvas}{bg=black}
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%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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% Title page
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\title[Python Development]{Python Development}
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\author[FOSSEE] {FOSSEE}
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\institute[IIT Bombay] {Department of Aerospace Engineering\\IIT Bombay}
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\date[] {1 May, 2010\\Day 2, Session 4}
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%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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%\pgfdeclareimage[height=0.75cm]{iitblogo}{iitblogo}
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%\logo{\pgfuseimage{iitblogo}}
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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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      \Large
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    \tableofcontents[currentsection,currentsubsection]
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  \end{frame}
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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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\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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% DOCUMENT STARTS
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\begin{document}
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\begin{frame}
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  \maketitle
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\end{frame}
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\section{Tests: Getting started}
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\begin{frame}[fragile] 
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  \frametitle{gcd revisited!}
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  \begin{itemize}
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  \item Open \texttt{gcd.py}
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  \end{itemize}  
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\begin{lstlisting}
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    def gcd(a, b):
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        if a % b == 0: 
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            return b
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        return gcd(b, a%b)
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    print gcd(15, 65)
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    print gcd(16, 76)
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\end{lstlisting}
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  \begin{itemize}
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  \item \texttt{python gcd.py}
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  \end{itemize}
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\end{frame}
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289
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\begin{frame}[fragile] 
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  \frametitle{Find lcm using our gcd module}
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  \begin{itemize}
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  \item Open \texttt{lcm.py}  
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  \item $lcm = \frac{a * b}{gcd(a,b)}$
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  \end{itemize}  
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\begin{lstlisting}
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    from gcd import gcd    
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    def lcm(a, b):
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        return (a * b) / gcd(a, b)
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    print lcm(14, 56)
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\end{lstlisting}
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  \begin{itemize}
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  \item \texttt{python lcm.py}
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  \end{itemize}
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  \begin{lstlisting}
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5
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4
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56
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  \end{lstlisting}    
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\end{frame}
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289
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\begin{frame}[fragile] 
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  \frametitle{Writing stand-alone module}  
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Edit \texttt{gcd.py} file to:
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\begin{lstlisting}
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    def gcd(a, b):
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        if a % b == 0: 
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            return b
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        return gcd(b, a%b)
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    if __name__ == "__main__":        
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        print gcd(15, 65)
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        print gcd(16, 76)
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\end{lstlisting}
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  \begin{itemize}
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  \item \texttt{python gcd.py}
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  \item \texttt{python lcm.py}
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  \end{itemize}
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\end{frame}
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\begin{frame}[fragile]
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  \frametitle{Automating tests}
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  \begin{lstlisting}
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def gcd(a, b):
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    if a % b == 0:
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        return b
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    return gcd(b, a % b)
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if __name__ == '__main__':
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    assert gcd(15, 65) == 5
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    assert gcd(16, 76) == 4
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  \end{lstlisting}  
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\end{frame}
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\begin{frame}[fragile]
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  \frametitle{Automating tests}
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  \begin{lstlisting}
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if __name__ == '__main__':
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    for line in open('numbers.txt'):
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        numbers = line.split()
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        x = int(numbers[0])
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        y = int(numbers[1])
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        result = int(numbers[2])
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        if gcd(x, y) != result:
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            print "Failed gcd test
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                          for", x, y
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  \end{lstlisting}  
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\end{frame}
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\begin{frame}[fragile]
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  \frametitle{Python Test Packages}
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    \begin{itemize}
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\item Python's \typ{unittest}:\linebreak
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  \url{http://docs.python.org/library/unittest.html}
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\linebreak
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\item \typ{nose}:\linebreak
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  \url{http://code.google.com/p/python-nose/}
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  \end{itemize}
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\end{frame}
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\section{Coding Style}
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\begin{frame}{Readability and Consistency}
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    \begin{itemize}
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        \item Readability Counts!\\Code is read more often than its written.
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        \item Consistency!
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        \item Know when to be inconsistent.
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        \item Play telephone with that line of code.
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      \end{itemize}
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\end{frame}
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\begin{frame}[fragile] \frametitle{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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    num_coins = round(amount/denom)
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    rounded_amount = num_coins * 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{Code Layout}
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  \begin{itemize}
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        \item Indentation
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        \item Tabs or Spaces?
289
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        \item Maximum Line Length
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        \item Blank Lines
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        \item Encodings
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        \item Consider any legible book
289
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   \end{itemize}
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\end{frame}
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289
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\begin{frame}{Whitespaces in Expressions}
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  \begin{itemize}
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        \item When to use extraneous whitespaces?
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        \item When to avoid extra whitespaces?
289
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        \item Use one statement per line
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   \end{itemize}
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\end{frame}
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434
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\begin{frame}[fragile]
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 \frametitle{Whitespace}
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 Whitespace... it's not just for compilers!
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  \begin{lstlisting}
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def myfanfunc(somevar,another,yetmore):
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    if a%b==0:return b
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    return myfanfunc(b,a%b)
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  \end{lstlisting}
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\end{frame}
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\begin{frame}[fragile]
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 \frametitle{Whitespace}
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 The compiler doesn't care!  Humans do!
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  \begin{lstlisting}
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def my_fan_func(some_var, another, yet_more):
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    if a % b == 0:
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        return b
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    return my_fan_func(b, a % b)
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  \end{lstlisting}
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\end{frame}
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289
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\begin{frame}{Comments}
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  \begin{itemize}
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        \item No comments better than contradicting comments
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        \item Block comments
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        \item Inline comments
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   \end{itemize}
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   323
\end{frame}
263
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289
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\begin{frame}{Docstrings}
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  \begin{itemize}
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        \item When to write docstrings?
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        \item Ending the docstrings
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        \item One liner docstrings
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   330
   \end{itemize}
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\end{frame}
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\begin{frame}{The Python Style Guide}
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  \begin{itemize}
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   335
   \item PEP8
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   \item PEP8
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   \item PEP8
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   \item \url{http://www.python.org/dev/peps/pep-0008/}
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   \end{itemize}
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\end{frame}
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   341
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\section{Debugging}
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   343
\subsection{Errors and Exceptions}
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\begin{frame}[fragile]
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 \frametitle{Errors}
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   346
 \begin{lstlisting}
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   347
In []: while True print 'Hello world'
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 \end{lstlisting}
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   349
\pause
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   350
  \begin{lstlisting}
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   351
  File "<stdin>", line 1, in ?
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   352
    while True print 'Hello world'
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   353
                   ^
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   354
SyntaxError: invalid syntax
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   355
\end{lstlisting}
219
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   356
\end{frame}
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f6725f6bee41 Session 4, Debugging and Testing.
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\begin{frame}[fragile]
289
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 \frametitle{Exceptions}
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   360
 \begin{lstlisting}
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   361
In []: print spam
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   362
\end{lstlisting}
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   363
\pause
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   364
\begin{lstlisting}
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   365
Traceback (most recent call last):
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  File "<stdin>", line 1, in <module>
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   367
NameError: name 'spam' is not defined
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   368
\end{lstlisting}
219
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   369
\end{frame}
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\begin{frame}[fragile]
289
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 \frametitle{Exceptions}
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   373
 \begin{lstlisting}
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   374
In []: 1 / 0
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   375
\end{lstlisting}
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   376
\pause
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   377
\begin{lstlisting}
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   378
Traceback (most recent call last):
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   379
  File "<stdin>", line 1, in <module>
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   380
ZeroDivisionError: integer division 
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   381
or modulo by zero
219
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   382
\end{lstlisting}
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   383
\end{frame}
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diff changeset
   384
263
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   385
\begin{frame}[fragile]
297
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diff changeset
   386
  \frametitle{Processing user input}
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   387
  \begin{lstlisting}
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diff changeset
   388
prompt = 'Enter a number(Q to quit): '
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diff changeset
   389
a835affb1447 Added final changes to all day 2 slides for Calicut workshop.
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   390
a = raw_input(prompt)
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diff changeset
   391
a835affb1447 Added final changes to all day 2 slides for Calicut workshop.
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diff changeset
   392
num = int(a) if a != 'Q' else 0
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diff changeset
   393
  \end{lstlisting}
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diff changeset
   394
  \emphbar{What if the user enters some other alphabet?}
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diff changeset
   395
\end{frame}
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diff changeset
   396
a835affb1447 Added final changes to all day 2 slides for Calicut workshop.
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diff changeset
   397
a835affb1447 Added final changes to all day 2 slides for Calicut workshop.
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diff changeset
   398
\begin{frame}[fragile]
289
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diff changeset
   399
  \frametitle{Handling Exceptions}
297
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diff changeset
   400
  Python provides \typ{try} and \typ{except} clause.
263
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diff changeset
   401
  \begin{lstlisting}
297
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diff changeset
   402
prompt = 'Enter a number(Q to quit): '
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diff changeset
   403
a835affb1447 Added final changes to all day 2 slides for Calicut workshop.
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diff changeset
   404
a = raw_input(prompt)
289
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diff changeset
   405
try:
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diff changeset
   406
    num = int(a)
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diff changeset
   407
    print num
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diff changeset
   408
except:
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diff changeset
   409
    if a == 'Q':
297
a835affb1447 Added final changes to all day 2 slides for Calicut workshop.
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diff changeset
   410
        print "Exiting ..."
289
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parents: 288
diff changeset
   411
    else:
297
a835affb1447 Added final changes to all day 2 slides for Calicut workshop.
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parents: 289
diff changeset
   412
        print "Wrong input ..."
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parents: 289
diff changeset
   413
  \end{lstlisting}  
289
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diff changeset
   414
\end{frame}
263
8a4a1e5aec85 Changes made for Goa workshop .
Shantanu <shantanu@fossee.in>
parents: 256
diff changeset
   415
289
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parents: 288
diff changeset
   416
\subsection{Strategy}
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diff changeset
   417
\begin{frame}[fragile]
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diff changeset
   418
    \frametitle{Debugging effectively}
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parents: 288
diff changeset
   419
    \begin{itemize}
884d42eff66d Reorganized last 3 sessions of day 2 again.
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diff changeset
   420
        \item \typ{print} based strategy
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diff changeset
   421
        \item Process:
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diff changeset
   422
    \end{itemize}
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parents: 288
diff changeset
   423
\begin{center}
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diff changeset
   424
\pgfimage[interpolate=true,width=5cm,height=5cm]{DebugginDiagram.png}
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parents: 288
diff changeset
   425
\end{center}
219
f6725f6bee41 Session 4, Debugging and Testing.
Shantanu <shantanu@fossee.in>
parents:
diff changeset
   426
\end{frame}
f6725f6bee41 Session 4, Debugging and Testing.
Shantanu <shantanu@fossee.in>
parents:
diff changeset
   427
f6725f6bee41 Session 4, Debugging and Testing.
Shantanu <shantanu@fossee.in>
parents:
diff changeset
   428
\begin{frame}[fragile]
289
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diff changeset
   429
    \frametitle{Debugging effectively}
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parents: 288
diff changeset
   430
    \begin{itemize}
884d42eff66d Reorganized last 3 sessions of day 2 again.
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parents: 288
diff changeset
   431
      \item Using \typ{\%debug} in IPython
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parents: 288
diff changeset
   432
    \end{itemize}
219
f6725f6bee41 Session 4, Debugging and Testing.
Shantanu <shantanu@fossee.in>
parents:
diff changeset
   433
\end{frame}
f6725f6bee41 Session 4, Debugging and Testing.
Shantanu <shantanu@fossee.in>
parents:
diff changeset
   434
f6725f6bee41 Session 4, Debugging and Testing.
Shantanu <shantanu@fossee.in>
parents:
diff changeset
   435
\begin{frame}[fragile]
289
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parents: 288
diff changeset
   436
\frametitle{Debugging in IPython}
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parents: 288
diff changeset
   437
\small
884d42eff66d Reorganized last 3 sessions of day 2 again.
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diff changeset
   438
\begin{lstlisting}
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diff changeset
   439
In []: import mymodule
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parents: 288
diff changeset
   440
In []: mymodule.test()
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parents: 288
diff changeset
   441
---------------------------------------------
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parents: 288
diff changeset
   442
NameError   Traceback (most recent call last)
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parents: 288
diff changeset
   443
<ipython console> in <module>()
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parents: 288
diff changeset
   444
mymodule.py in test()
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parents: 288
diff changeset
   445
      1 def test():
884d42eff66d Reorganized last 3 sessions of day 2 again.
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parents: 288
diff changeset
   446
----> 2     print spam
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parents: 288
diff changeset
   447
NameError: global name 'spam' is not defined
288
c4e25269a86c Reorganized slides.
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diff changeset
   448
289
884d42eff66d Reorganized last 3 sessions of day 2 again.
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diff changeset
   449
In []: %debug
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diff changeset
   450
> mymodule.py(2)test()
884d42eff66d Reorganized last 3 sessions of day 2 again.
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parents: 288
diff changeset
   451
      0     print spam
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parents: 288
diff changeset
   452
ipdb> 
288
c4e25269a86c Reorganized slides.
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diff changeset
   453
\end{lstlisting}
289
884d42eff66d Reorganized last 3 sessions of day 2 again.
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diff changeset
   454
\inctime{15} 
288
c4e25269a86c Reorganized slides.
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diff changeset
   455
\end{frame}
c4e25269a86c Reorganized slides.
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diff changeset
   456
289
884d42eff66d Reorganized last 3 sessions of day 2 again.
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diff changeset
   457
\subsection{Exercise}
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diff changeset
   458
\begin{frame}[fragile]
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diff changeset
   459
\frametitle{Debugging: Exercise}
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diff changeset
   460
\small
884d42eff66d Reorganized last 3 sessions of day 2 again.
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parents: 288
diff changeset
   461
\begin{lstlisting}
884d42eff66d Reorganized last 3 sessions of day 2 again.
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diff changeset
   462
science = {}
288
c4e25269a86c Reorganized slides.
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diff changeset
   463
289
884d42eff66d Reorganized last 3 sessions of day 2 again.
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diff changeset
   464
for record in open('sslc1.txt'):
884d42eff66d Reorganized last 3 sessions of day 2 again.
Madhusudan.C.S <madhusudancs@gmail.com>
parents: 288
diff changeset
   465
    fields = record.split(';')
884d42eff66d Reorganized last 3 sessions of day 2 again.
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parents: 288
diff changeset
   466
    region_code = fields[0].strip()
884d42eff66d Reorganized last 3 sessions of day 2 again.
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parents: 288
diff changeset
   467
884d42eff66d Reorganized last 3 sessions of day 2 again.
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parents: 288
diff changeset
   468
    score_str = fields[6].strip()
884d42eff66d Reorganized last 3 sessions of day 2 again.
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parents: 288
diff changeset
   469
    score = int(score_str) if score_str != 'AA' 
884d42eff66d Reorganized last 3 sessions of day 2 again.
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parents: 288
diff changeset
   470
                           else 0
884d42eff66d Reorganized last 3 sessions of day 2 again.
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parents: 288
diff changeset
   471
884d42eff66d Reorganized last 3 sessions of day 2 again.
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parents: 288
diff changeset
   472
    if score > 90:
884d42eff66d Reorganized last 3 sessions of day 2 again.
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parents: 288
diff changeset
   473
        science[region_code] += 1
219
f6725f6bee41 Session 4, Debugging and Testing.
Shantanu <shantanu@fossee.in>
parents:
diff changeset
   474
289
884d42eff66d Reorganized last 3 sessions of day 2 again.
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parents: 288
diff changeset
   475
pie(science.values(), labels=science.keys())
884d42eff66d Reorganized last 3 sessions of day 2 again.
Madhusudan.C.S <madhusudancs@gmail.com>
parents: 288
diff changeset
   476
savefig('science.png')
884d42eff66d Reorganized last 3 sessions of day 2 again.
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parents: 288
diff changeset
   477
\end{lstlisting}
884d42eff66d Reorganized last 3 sessions of day 2 again.
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parents: 288
diff changeset
   478
\inctime{10}
884d42eff66d Reorganized last 3 sessions of day 2 again.
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parents: 288
diff changeset
   479
\end{frame}
884d42eff66d Reorganized last 3 sessions of day 2 again.
Madhusudan.C.S <madhusudancs@gmail.com>
parents: 288
diff changeset
   480
297
a835affb1447 Added final changes to all day 2 slides for Calicut workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents: 289
diff changeset
   481
\begin{frame}
a835affb1447 Added final changes to all day 2 slides for Calicut workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents: 289
diff changeset
   482
  \frametitle{Summary}
a835affb1447 Added final changes to all day 2 slides for Calicut workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents: 289
diff changeset
   483
We have covered:
a835affb1447 Added final changes to all day 2 slides for Calicut workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents: 289
diff changeset
   484
  \begin{itemize}
a835affb1447 Added final changes to all day 2 slides for Calicut workshop.
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parents: 289
diff changeset
   485
  \item Following and Resolving Error Messages.
a835affb1447 Added final changes to all day 2 slides for Calicut workshop.
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parents: 289
diff changeset
   486
  \item Exceptions.
a835affb1447 Added final changes to all day 2 slides for Calicut workshop.
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parents: 289
diff changeset
   487
  \item Handling exceptions
a835affb1447 Added final changes to all day 2 slides for Calicut workshop.
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parents: 289
diff changeset
   488
  \item Approach for Debugging.
a835affb1447 Added final changes to all day 2 slides for Calicut workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents: 289
diff changeset
   489
%  \item Writting and running tests.
a835affb1447 Added final changes to all day 2 slides for Calicut workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents: 289
diff changeset
   490
  \end{itemize}
a835affb1447 Added final changes to all day 2 slides for Calicut workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents: 289
diff changeset
   491
\end{frame}
a835affb1447 Added final changes to all day 2 slides for Calicut workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents: 289
diff changeset
   492
a835affb1447 Added final changes to all day 2 slides for Calicut workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents: 289
diff changeset
   493
\end{document}
a835affb1447 Added final changes to all day 2 slides for Calicut workshop.
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parents: 289
diff changeset
   494
344
19754ed6050f Moved all day2 quiz questions to end of day2-sessions.
Puneeth Chaganti <punchagan@fossee.in>
parents: 339
diff changeset
   495
%% \begin{frame}[fragile]
19754ed6050f Moved all day2 quiz questions to end of day2-sessions.
Puneeth Chaganti <punchagan@fossee.in>
parents: 339
diff changeset
   496
%%     \frametitle{\incqno}
19754ed6050f Moved all day2 quiz questions to end of day2-sessions.
Puneeth Chaganti <punchagan@fossee.in>
parents: 339
diff changeset
   497
%%     Consider a module called \lstinline+gcd.py+ looking like this:
19754ed6050f Moved all day2 quiz questions to end of day2-sessions.
Puneeth Chaganti <punchagan@fossee.in>
parents: 339
diff changeset
   498
%%     \begin{lstlisting}
19754ed6050f Moved all day2 quiz questions to end of day2-sessions.
Puneeth Chaganti <punchagan@fossee.in>
parents: 339
diff changeset
   499
%% def gcd(a, b):
19754ed6050f Moved all day2 quiz questions to end of day2-sessions.
Puneeth Chaganti <punchagan@fossee.in>
parents: 339
diff changeset
   500
%%    ...
19754ed6050f Moved all day2 quiz questions to end of day2-sessions.
Puneeth Chaganti <punchagan@fossee.in>
parents: 339
diff changeset
   501
19754ed6050f Moved all day2 quiz questions to end of day2-sessions.
Puneeth Chaganti <punchagan@fossee.in>
parents: 339
diff changeset
   502
%% if __name__ == '__main__':
19754ed6050f Moved all day2 quiz questions to end of day2-sessions.
Puneeth Chaganti <punchagan@fossee.in>
parents: 339
diff changeset
   503
%%     print gcd(10, 25)
19754ed6050f Moved all day2 quiz questions to end of day2-sessions.
Puneeth Chaganti <punchagan@fossee.in>
parents: 339
diff changeset
   504
%%     \end{lstlisting}
19754ed6050f Moved all day2 quiz questions to end of day2-sessions.
Puneeth Chaganti <punchagan@fossee.in>
parents: 339
diff changeset
   505
%% If this module is imported, will it print the gcd of 10 and 25?
19754ed6050f Moved all day2 quiz questions to end of day2-sessions.
Puneeth Chaganti <punchagan@fossee.in>
parents: 339
diff changeset
   506
%% \end{frame}
19754ed6050f Moved all day2 quiz questions to end of day2-sessions.
Puneeth Chaganti <punchagan@fossee.in>
parents: 339
diff changeset
   507
19754ed6050f Moved all day2 quiz questions to end of day2-sessions.
Puneeth Chaganti <punchagan@fossee.in>
parents: 339
diff changeset
   508
%% \begin{frame}[fragile]
19754ed6050f Moved all day2 quiz questions to end of day2-sessions.
Puneeth Chaganti <punchagan@fossee.in>
parents: 339
diff changeset
   509
%%     \frametitle{\incqno}
19754ed6050f Moved all day2 quiz questions to end of day2-sessions.
Puneeth Chaganti <punchagan@fossee.in>
parents: 339
diff changeset
   510
%%   \begin{lstlisting}
19754ed6050f Moved all day2 quiz questions to end of day2-sessions.
Puneeth Chaganti <punchagan@fossee.in>
parents: 339
diff changeset
   511
%% In [1]: print hello 
19754ed6050f Moved all day2 quiz questions to end of day2-sessions.
Puneeth Chaganti <punchagan@fossee.in>
parents: 339
diff changeset
   512
%%   \end{lstlisting}
19754ed6050f Moved all day2 quiz questions to end of day2-sessions.
Puneeth Chaganti <punchagan@fossee.in>
parents: 339
diff changeset
   513
%%   Exactly what exception will you get if you run this on a fresh
19754ed6050f Moved all day2 quiz questions to end of day2-sessions.
Puneeth Chaganti <punchagan@fossee.in>
parents: 339
diff changeset
   514
%%   interpreter?
19754ed6050f Moved all day2 quiz questions to end of day2-sessions.
Puneeth Chaganti <punchagan@fossee.in>
parents: 339
diff changeset
   515
%% \end{frame}
19754ed6050f Moved all day2 quiz questions to end of day2-sessions.
Puneeth Chaganti <punchagan@fossee.in>
parents: 339
diff changeset
   516
289
884d42eff66d Reorganized last 3 sessions of day 2 again.
Madhusudan.C.S <madhusudancs@gmail.com>
parents: 288
diff changeset
   517
%% \begin{frame}
884d42eff66d Reorganized last 3 sessions of day 2 again.
Madhusudan.C.S <madhusudancs@gmail.com>
parents: 288
diff changeset
   518
%%     \frametitle{Testing}
884d42eff66d Reorganized last 3 sessions of day 2 again.
Madhusudan.C.S <madhusudancs@gmail.com>
parents: 288
diff changeset
   519
   
884d42eff66d Reorganized last 3 sessions of day 2 again.
Madhusudan.C.S <madhusudancs@gmail.com>
parents: 288
diff changeset
   520
%%     \begin{itemize}
884d42eff66d Reorganized last 3 sessions of day 2 again.
Madhusudan.C.S <madhusudancs@gmail.com>
parents: 288
diff changeset
   521
%%         \item Writing tests is really simple!
884d42eff66d Reorganized last 3 sessions of day 2 again.
Madhusudan.C.S <madhusudancs@gmail.com>
parents: 288
diff changeset
   522
884d42eff66d Reorganized last 3 sessions of day 2 again.
Madhusudan.C.S <madhusudancs@gmail.com>
parents: 288
diff changeset
   523
%%         \item Using nose.
884d42eff66d Reorganized last 3 sessions of day 2 again.
Madhusudan.C.S <madhusudancs@gmail.com>
parents: 288
diff changeset
   524
884d42eff66d Reorganized last 3 sessions of day 2 again.
Madhusudan.C.S <madhusudancs@gmail.com>
parents: 288
diff changeset
   525
%%         \item Example!
884d42eff66d Reorganized last 3 sessions of day 2 again.
Madhusudan.C.S <madhusudancs@gmail.com>
parents: 288
diff changeset
   526
%%     \end{itemize}
884d42eff66d Reorganized last 3 sessions of day 2 again.
Madhusudan.C.S <madhusudancs@gmail.com>
parents: 288
diff changeset
   527
%% \end{frame}
884d42eff66d Reorganized last 3 sessions of day 2 again.
Madhusudan.C.S <madhusudancs@gmail.com>
parents: 288
diff changeset
   528
297
a835affb1447 Added final changes to all day 2 slides for Calicut workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents: 289
diff changeset
   529
% \section{Test Driven Approach}
a835affb1447 Added final changes to all day 2 slides for Calicut workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents: 289
diff changeset
   530
% \begin{frame}
a835affb1447 Added final changes to all day 2 slides for Calicut workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents: 289
diff changeset
   531
%     \frametitle{Need for Testing!}
a835affb1447 Added final changes to all day 2 slides for Calicut workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents: 289
diff changeset
   532
%    
a835affb1447 Added final changes to all day 2 slides for Calicut workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents: 289
diff changeset
   533
%     \begin{itemize}
a835affb1447 Added final changes to all day 2 slides for Calicut workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents: 289
diff changeset
   534
%         \item Quality
a835affb1447 Added final changes to all day 2 slides for Calicut workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents: 289
diff changeset
   535
%         \item Regression
a835affb1447 Added final changes to all day 2 slides for Calicut workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents: 289
diff changeset
   536
%         \item Documentation
a835affb1447 Added final changes to all day 2 slides for Calicut workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents: 289
diff changeset
   537
%     \end{itemize}
a835affb1447 Added final changes to all day 2 slides for Calicut workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents: 289
diff changeset
   538
%     %% \vspace*{0.25in}
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   539
%     %% \emphbar{It is to assure that section of code is working as it is supposed to work}
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   540
% \end{frame}
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% 
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% \begin{frame}[fragile]
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%     \frametitle{Example}
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%     \begin{block}{Problem Statement}
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   545
%       Write a function to check whether a given input
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   546
%       string is a palindrome.
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   547
%     \end{block}
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% \end{frame}
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% 
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% \begin{frame}[fragile]
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%     \frametitle{Function: palindrome.py}
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   552
% \begin{lstlisting}    
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   553
% def is_palindrome(input_str):
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%   return input_str == input_str[::-1]
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   555
% \end{lstlisting}    
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   556
% \end{frame}
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   557
% 
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   558
% \begin{frame}[fragile]
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diff changeset
   559
%     \frametitle{Test for the palindrome: palindrome.py}
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parents: 289
diff changeset
   560
% \begin{lstlisting}    
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diff changeset
   561
% def test_function_normal_words():
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diff changeset
   562
%   input = "noon"
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diff changeset
   563
%   assert is_palindrome(input) == True
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parents: 289
diff changeset
   564
% 
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diff changeset
   565
% if __name__ == "main'':
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   566
%   test_function_normal_words()
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   567
% \end{lstlisting}    
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   568
% \end{frame}
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diff changeset
   569
% 
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diff changeset
   570
% \begin{frame}[fragile]
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   571
%     \frametitle{Running the tests.}
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parents: 289
diff changeset
   572
% \begin{lstlisting}    
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parents: 289
diff changeset
   573
% $ nosetests palindrome.py 
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parents: 289
diff changeset
   574
% .
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   575
% ----------------------------------------------
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   576
% Ran 1 test in 0.001s
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% 
a835affb1447 Added final changes to all day 2 slides for Calicut workshop.
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parents: 289
diff changeset
   578
% OK
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parents: 289
diff changeset
   579
% \end{lstlisting}    
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parents: 289
diff changeset
   580
% \end{frame}
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diff changeset
   581
% 
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diff changeset
   582
% \begin{frame}[fragile]
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parents: 289
diff changeset
   583
%     \frametitle{Exercise: Including new tests.}
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parents: 289
diff changeset
   584
% \begin{lstlisting}    
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parents: 289
diff changeset
   585
% def test_function_ignore_cases_words():
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parents: 289
diff changeset
   586
%   input = "Noon"
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Madhusudan.C.S <madhusudancs@gmail.com>
parents: 289
diff changeset
   587
%   assert is_palindrome(input) == True
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Madhusudan.C.S <madhusudancs@gmail.com>
parents: 289
diff changeset
   588
% \end{lstlisting}
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parents: 289
diff changeset
   589
%      \vspace*{0.25in}
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diff changeset
   590
%      Check\\
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parents: 289
diff changeset
   591
%      \PythonCode{$ nosetests palindrome.py} \\
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parents: 289
diff changeset
   592
%      \begin{block}{Task}
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parents: 289
diff changeset
   593
%      Tweak the code to pass this test.
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parents: 289
diff changeset
   594
%      \end{block}
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parents: 289
diff changeset
   595
% \end{frame}
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diff changeset
   596
% 
a835affb1447 Added final changes to all day 2 slides for Calicut workshop.
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parents: 289
diff changeset
   597
% %\begin{frame}[fragile]
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parents: 289
diff changeset
   598
% %    \frametitle{Lets write some test!}
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parents: 289
diff changeset
   599
% %\begin{lstlisting}    
a835affb1447 Added final changes to all day 2 slides for Calicut workshop.
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parents: 289
diff changeset
   600
% %#for form of equation y=mx+c
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parents: 289
diff changeset
   601
% %#given m and c for two equation,
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parents: 289
diff changeset
   602
% %#finding the intersection point.
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parents: 289
diff changeset
   603
% %def intersect(m1,c1,m2,c2):
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parents: 289
diff changeset
   604
% %    x = (c2-c1)/(m1-m2)
a835affb1447 Added final changes to all day 2 slides for Calicut workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents: 289
diff changeset
   605
% %    y = m1*x+c1
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parents: 289
diff changeset
   606
% %    return (x,y)
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parents: 289
diff changeset
   607
% %\end{lstlisting}
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parents: 289
diff changeset
   608
% %
a835affb1447 Added final changes to all day 2 slides for Calicut workshop.
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parents: 289
diff changeset
   609
% %Create a simple test for this
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parents: 289
diff changeset
   610
% %
a835affb1447 Added final changes to all day 2 slides for Calicut workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents: 289
diff changeset
   611
% %function which will make it fail.
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parents: 289
diff changeset
   612
% %
a835affb1447 Added final changes to all day 2 slides for Calicut workshop.
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parents: 289
diff changeset
   613
% %\inctime{15} 
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parents: 289
diff changeset
   614
% %\end{frame}
a835affb1447 Added final changes to all day 2 slides for Calicut workshop.
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parents: 289
diff changeset
   615
% %
a835affb1447 Added final changes to all day 2 slides for Calicut workshop.
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parents: 289
diff changeset
   616
% 
a835affb1447 Added final changes to all day 2 slides for Calicut workshop.
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parents: 289
diff changeset
   617
% %% \begin{frame}[fragile]
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parents: 289
diff changeset
   618
% %%     \frametitle{Exercise}
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parents: 289
diff changeset
   619
% %%     Based on Euclid's algorithm:
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parents: 289
diff changeset
   620
% %%     \begin{center}
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parents: 289
diff changeset
   621
% %%     $gcd(a,b)=gcd(b,b\%a)$
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Madhusudan.C.S <madhusudancs@gmail.com>
parents: 289
diff changeset
   622
% %%     \end{center}
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Madhusudan.C.S <madhusudancs@gmail.com>
parents: 289
diff changeset
   623
% %%     gcd function can be written as:
a835affb1447 Added final changes to all day 2 slides for Calicut workshop.
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parents: 289
diff changeset
   624
% %%     \begin{lstlisting}
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parents: 289
diff changeset
   625
% %%     def gcd(a, b):
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parents: 289
diff changeset
   626
% %%       if a%b == 0: return b
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Madhusudan.C.S <madhusudancs@gmail.com>
parents: 289
diff changeset
   627
% %%       return gcd(b, a%b)
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Madhusudan.C.S <madhusudancs@gmail.com>
parents: 289
diff changeset
   628
% %%     \end{lstlisting}
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parents: 289
diff changeset
   629
% %%     \vspace*{-0.15in}
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parents: 289
diff changeset
   630
% %%     \begin{block}{Task}
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Madhusudan.C.S <madhusudancs@gmail.com>
parents: 289
diff changeset
   631
% %%       \begin{itemize}
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Madhusudan.C.S <madhusudancs@gmail.com>
parents: 289
diff changeset
   632
% %%       \item Write at least 
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Madhusudan.C.S <madhusudancs@gmail.com>
parents: 289
diff changeset
   633
% %%         two tests for above mentioned function.
a835affb1447 Added final changes to all day 2 slides for Calicut workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents: 289
diff changeset
   634
% %%       \item Write a non recursive implementation
a835affb1447 Added final changes to all day 2 slides for Calicut workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents: 289
diff changeset
   635
% %%       of gcd(), and test it using already 
a835affb1447 Added final changes to all day 2 slides for Calicut workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents: 289
diff changeset
   636
% %%       written tests.
a835affb1447 Added final changes to all day 2 slides for Calicut workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents: 289
diff changeset
   637
% %%       \end{itemize}
a835affb1447 Added final changes to all day 2 slides for Calicut workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents: 289
diff changeset
   638
% %%     \end{block}
a835affb1447 Added final changes to all day 2 slides for Calicut workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents: 289
diff changeset
   639
%     
a835affb1447 Added final changes to all day 2 slides for Calicut workshop.
Madhusudan.C.S <madhusudancs@gmail.com>
parents: 289
diff changeset
   640
% %% \inctime{15} 
330
46533051b9d3 commited changes made for scipy and cheatsheats.
Shantanu <shantanu@fossee.in>
parents: 297
diff changeset
   641
% %% \end{frame}