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% Created 2011-07-14 Thu 16:14
\documentclass[presentation]{beamer}
\usepackage[latin1]{inputenc}
\usepackage[T1]{fontenc}
\usepackage{fixltx2e}
\usepackage{graphicx}
\usepackage{longtable}
\usepackage{float}
\usepackage{wrapfig}
\usepackage{soul}
\usepackage{textcomp}
\usepackage{marvosym}
\usepackage{wasysym}
\usepackage{latexsym}
\usepackage{amssymb}
\usepackage{hyperref}
\tolerance=1000
\usepackage[english]{babel} \usepackage{ae,aecompl}
\usepackage{mathpazo,courier,euler} \usepackage[scaled=.95]{helvet}
\usepackage{listings}
\lstset{language=Python, basicstyle=\ttfamily\bfseries,
commentstyle=\color{red}\itshape, stringstyle=\color{darkgreen},
showstringspaces=false, keywordstyle=\color{blue}\bfseries}
\providecommand{\alert}[1]{\textbf{#1}}
\title{}
\author{FOSSEE}
\date{}
\usetheme{Warsaw}\usecolortheme{default}\useoutertheme{infolines}\setbeamercovered{transparent}
\begin{document}
\begin{frame}
\begin{center}
\vspace{12pt}
\textcolor{blue}{\huge Writing python scripts}
\end{center}
\vspace{18pt}
\begin{center}
\vspace{10pt}
\includegraphics[scale=0.95]{../images/fossee-logo.png}\\
\vspace{5pt}
\scriptsize Developed by FOSSEE Team, IIT-Bombay. \\
\scriptsize Funded by National Mission on Education through ICT\\
\scriptsize MHRD,Govt. of India\\
\includegraphics[scale=0.30]{../images/iitb-logo.png}\\
\end{center}
\end{frame}
\begin{frame}
\frametitle{Objectives}
\label{sec-2}
At the end of this tutorial, you will be able to,
\begin{itemize}
\item Understand what is importing.
\item Write your own Python modules.
\item Understand the \_\_name\_\_==``\_\_main\_\_'' idiom
\end{itemize}
\end{frame}
\begin{frame}
\frametitle{Pre-requisite}
\label{sec-3}
Spoken tutorial on -
\begin{itemize}
\item Using Python modules
\end{itemize}
\end{frame}
\begin{frame}[fragile]
\frametitle{GCD}
\label{sec-4}
\lstset{language=Python}
\begin{lstlisting}
def gcd(a, b):
while b:
a, b = b, a%b
return a
if gcd(40, 12) == 4:
print "Everything OK"
else:
print "The GCD function is wrong"
\end{lstlisting}
\end{frame}
\begin{frame}[fragile]
\frametitle{\_\_name\_\_ variable}
\label{sec-5}
\lstset{language=Python}
\begin{lstlisting}
if __name__ == "__main__":
\end{lstlisting}
\end{frame}
\begin{frame}
\frametitle{Summary}
\label{sec-6}
In this tutorial, we have learnt to,
\begin{itemize}
\item Know what happens when we import a module.
\item Use a script as a module.
\item Write test functions using the ``\_\_name\_\_'' idiom.
\end{itemize}
\end{frame}
\begin{frame}
\frametitle{Evaluation}
\label{sec-7}
\begin{enumerate}
\item Which of the following variables contains the locations to search for
python modules
\begin{itemize}
\item sys.pythonpath
\item sys.path
\item os.pythonpath
\item os.path
\end{itemize}
\vspace{8pt}
\item A module should contain only functions.
\begin{itemize}
\item True
\item False
\end{itemize}
\end{enumerate}
\end{frame}
\begin{frame}[fragile]
\frametitle{Evaluation contd..}
\label{sec-8}
\begin{itemize}
\item The script ``utils.py'' is in one of locations of PYTHONPATH and contains
the following code
\lstset{language=Python}
\begin{lstlisting}
def show(x):
print x
show("Hello World")
if __name__ == "__main__":
show("Hello Test")
\end{lstlisting}
How do you use the ``show'' function after doing ``import utils''
\begin{itemize}
\item utils.show(``hey'')
\item show(``hey'')
\item utils.py.show(``hey'')
\item utils.py.show.py(``hey'')
\end{itemize}
\end{itemize}
\end{frame}
\begin{frame}
\frametitle{Solutions}
\label{sec-9}
\begin{enumerate}
\item sys.path
\vspace{12pt}
\item False
\vspace{12pt}
\item utils.show(``hey'')
\end{enumerate}
\end{frame}
\begin{frame}
\begin{block}{}
\begin{center}
\textcolor{blue}{\Large THANK YOU!}
\end{center}
\end{block}
\begin{block}{}
\begin{center}
For more Information, visit our website\\
\url{http://fossee.in/}
\end{center}
\end{block}
\end{frame}
\end{document}
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