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+++ b/using python modules/slides.tex	Tue Oct 12 17:15:11 2010 +0530
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+% Created 2010-10-12 Tue 17:12
+\documentclass[presentation]{beamer}
+\usepackage[latin1]{inputenc}
+\usepackage[T1]{fontenc}
+\usepackage{fixltx2e}
+\usepackage{graphicx}
+\usepackage{longtable}
+\usepackage{float}
+\usepackage{wrapfig}
+\usepackage{soul}
+\usepackage{t1enc}
+\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{Using python modules}
+\author{FOSSEE}
+\date{}
+
+\usetheme{Warsaw}\usecolortheme{default}\useoutertheme{infolines}\setbeamercovered{transparent}
+\begin{document}
+
+\maketitle
+
+
+
+
+
+
+
+
+
+\begin{frame}
+\frametitle{Outline}
+\label{sec-1}
+
+\begin{itemize}
+\item Running python scripts from command line
+\item Importing python modules
+\item Importing scipy \& pylab modules
+\item About python standard library.
+\end{itemize}
+\end{frame}
+\begin{frame}[fragile]
+\frametitle{Running Python script from command line}
+\label{sec-2}
+
+\begin{itemize}
+\item Create a script, open text editor and type the following
+\begin{verbatim}
+     print "hello world!"
+     print
+\end{verbatim}
+
+\item Save the script as \texttt{hello.py}
+\end{itemize}
+\end{frame}
+\begin{frame}[fragile]
+\frametitle{Running Python script from command line (cont'd)}
+\label{sec-3}
+
+\begin{itemize}
+\item Run the script
+\begin{verbatim}
+     $ python hello.py
+\end{verbatim}
+
+\end{itemize}
+
+  \emph{Syntax :} \textbf{python filename}
+\end{frame}
+\begin{frame}
+\frametitle{Four plot problem}
+\label{sec-4}
+
+    \begin{center}
+      \includegraphics[scale=0.4]{four_plot}    
+    \end{center}
+\end{frame}
+\begin{frame}[fragile]
+\frametitle{Fix \texttt{linspace()} problem}
+\label{sec-5}
+
+\begin{verbatim}
+   from scipy import *
+\end{verbatim}
+\end{frame}
+\begin{frame}[fragile]
+\frametitle{Fix \texttt{plot()} problem}
+\label{sec-6}
+
+\begin{verbatim}
+   from pylab import *
+\end{verbatim}
+\end{frame}
+\begin{frame}[fragile]
+\frametitle{Better way of fixing}
+\label{sec-7}
+
+\begin{verbatim}
+   from scipy import linspace
+\end{verbatim}
+
+  instead of
+\begin{verbatim}
+   from scipy import *
+\end{verbatim}
+
+    \texttt{*} means import all functions from name-space \texttt{scipy}.
+\end{frame}
+\begin{frame}[fragile]
+\frametitle{Instead of \texttt{*}}
+\label{sec-8}
+
+\begin{verbatim}
+    from scipy import linspace, pi, sin
+    from pylab import plot, legend, annotate
+    from pylab import xlim, ylim, title, show
+\end{verbatim}
+
+  Is better than, \texttt{from scipy import *} \& \texttt{from pylab import *}.
+\end{frame}
+\begin{frame}[fragile]
+\frametitle{Another Fix}
+\label{sec-9}
+
+\begin{verbatim}
+import scipy
+import pylab
+x = scipy.linspace(-5*scipy.pi, 5*scipy.pi, 500)
+pylab.plot(x, x, 'b')
+pylab.plot(x, -x, 'b')
+pylab.plot(x, scipy.sin(x), 'g', linewidth=2)
+pylab.plot(x, x*scipy.sin(x), 'r', linewidth=3)
+pylab.legend(['x', '-x', 'sin(x)', 'xsin(x)'])
+pylab.annotate('origin', xy = (0, 0))
+pylab.xlim(-5*scipy.pi, 5*scipy.pi)
+pylab.ylim(-5*scipy.pi, 5*scipy.pi)
+\end{verbatim}
+\end{frame}
+\begin{frame}
+\frametitle{Exercise 1}
+\label{sec-10}
+
+  Write a python script to plot a sine wave from 
+    $-2\Pi$
+  to 
+    $2\Pi$
+  .
+\end{frame}
+\begin{frame}
+\frametitle{What is a module?}
+\label{sec-11}
+
+  Module is simply a file containing Python definitions and
+  statements. Definitions from a module can be imported into other
+  modules or into the main module.
+\end{frame}
+\begin{frame}
+\frametitle{Python standard library}
+\label{sec-12}
+
+  Python has a very rich standard library of modules.
+\begin{itemize}
+\item Few libraries
+
+\begin{itemize}
+\item Math: \texttt{math}, \texttt{random}
+\item Internet access: \texttt{urllib2}, \texttt{smtplib}
+\item System, Command line arguments: \texttt{sys}
+\item Operating system interface: \texttt{os}
+\item regular expressions: \texttt{re}
+\item compression: \texttt{gzip}, \texttt{zipfile}, \texttt{tarfile}
+\end{itemize}
+
+\item More information
+
+\begin{itemize}
+\item \href{http://docs.python.org/library}{http://docs.python.org/library}
+\end{itemize}
+
+\end{itemize}
+\end{frame}
+\begin{frame}
+\frametitle{Summary}
+\label{sec-13}
+
+\begin{itemize}
+\item Running scripts from command line
+\item Learned about modules
+
+\begin{itemize}
+\item importing modules
+\end{itemize}
+
+\item Python standard library
+\end{itemize}
+\end{frame}
+\begin{frame}
+\frametitle{Thank you!}
+\label{sec-14}
+
+  \begin{block}{}
+  \begin{center}
+  This spoken tutorial has been produced by the
+  \textcolor{blue}{FOSSEE} team, which is funded by the 
+  \end{center}
+  \begin{center}
+    \textcolor{blue}{National Mission on Education through \\
+      Information \& Communication Technology \\ 
+      MHRD, Govt. of India}.
+  \end{center}  
+  \end{block}
+\end{frame}
+
+\end{document}