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%Tutorial slides on Python.

%

% Author: Prabhu Ramachandran <prabhu at aero.iitb.ac.in>

% Copyright (c) 2005-2009, Prabhu Ramachandran

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% Taken from Fernando's slides.

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\usepackage[scaled=.95]{helvet}

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\usepackage{listings}

\lstset{language=Python,

    basicstyle=\ttfamily\bfseries,

    commentstyle=\color{red}\itshape,

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%%% This is from Fernando's setup.

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% Title page

\title[Basic Python]{Python:\\A formal approach}

\author[FOSSEE Team] {The FOSSEE Group}

\institute[IIT Bombay] {Department of Aerospace Engineering\\IIT Bombay}

\date[] {1, November 2009\\Day 2, Session 1}

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%% Delete this, if you do not want the table of contents to pop up at

%% the beginning of each subsection:

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{

  \begin{frame}<beamer>

    \frametitle{Outline}

    \tableofcontents[currentsection,currentsubsection]

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    \frametitle{Outline}

    \tableofcontents[currentsection,currentsubsection]

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% DOCUMENT STARTS

\begin{document}

\begin{frame}

  \titlepage

\end{frame}

\begin{frame}

  \frametitle{Outline}

  \tableofcontents

  % You might wish to add the option [pausesections]

\end{frame}

\section{Data types}

\begin{frame}

  \frametitle{Primitive Data types}

  \begin{itemize}

    \item Numbers: float, int, complex

    \item Strings

    \item Boolean

  \end{itemize}

\end{frame}

\subsection{Numbers}

\begin{frame}[fragile]

  \frametitle{Numbers}

  \begin{itemize}

    \item \kwrd{int}\\ Any whole number is an \kwrd{int}, no matter what the size!

  \begin{lstlisting}

  \end{lstlisting}

    \item \kwrd{float}

  \begin{lstlisting}

  \end{lstlisting}

  \end{itemize}

\end{frame}

\begin{frame}[fragile]

\frametitle{Complex numbers}

  \begin{lstlisting}

  \end{lstlisting}

\end{frame}

\subsection{Boolean}

\end{frame}

\subsection{Strings}

\begin{frame}[fragile]

Strings were introduced previously, let us now look at them in a little more detail.

  \begin{lstlisting}

  \end{lstlisting}

\end{frame}

\begin{frame}[fragile]

\frametitle{Still with strings}

  \begin{lstlisting}

  \end{lstlisting}

\end{frame}

\begin{frame}[fragile]

\frametitle{String formatting}

  \begin{lstlisting}

  \end{lstlisting}

\inctime{10}

\end{frame}

\begin{frame}[fragile]

  \frametitle{Relational and logical operators}

  \begin{lstlisting}

  \end{lstlisting}

\inctime{5}

\end{frame}

\begin{frame}

  {A classic problem}

  \begin{block}

    {Interchange values}

    How to interchange values of two variables? 

  \end{block}

  \pause

  \begin{block}{Note:}

    This Python idiom works for all types of variables.\\

They need not be of the same type!

  \end{block}

  \inctime{10}

\end{frame}

\section{Control flow}

\begin{frame}

  \frametitle{Control flow constructs}  

  \begin{itemize}

  \item \kwrd{if/elif/else}: branching

  \item \kwrd{while}: looping

  \item \kwrd{for}: iterating 

  \item \kwrd{break, continue}: modify loop 

  \item \kwrd{pass}: syntactic filler

  \end{itemize}

\end{frame}

\subsection{Basic Conditional flow}

\begin{frame}[fragile]

  \frametitle{\typ{If...elif...else} example}

\begin{lstlisting}

x = int(raw_input("Enter an integer:"))

if x < 0:

     print 'Be positive!'

elif x == 0:

     print 'Zero'

elif x == 1:

     print 'Single'

else:

     print 'More'

\end{lstlisting}

\end{frame}

\subsection{Basic Looping}

\begin{frame}[fragile]

Example: Fibonacci series

  \begin{lstlisting}

# the sum of two elements

# defines the next

a, b = 0, 1

while b < 10:

    print b,

    a, b = b, a + b 

\end{lstlisting}

\typ{1 1 2 3 5 8}\\  

\end{frame}

\begin{frame}[fragile]

\kwrd{range([start,] stop[, step])}\\

\begin{itemize}

  \item \alert {range() returns a list of integers}

  \item \alert {The start and the step arguments are optional}  

\end{itemize}

\end{frame}

\begin{frame}[fragile]

Example: print squares of first \typ{n} numbers

  \begin{lstlisting}

In []: for i in range(5):

 ....:     print i, i * i

 ....:     

 ....:     

0 0

1 1

2 4

3 9

4 16

\end{lstlisting}

\inctime{15}

\end{frame}

\section{Lists}

\begin{frame}[fragile]

\frametitle{More List methods}

\begin{lstlisting}

In []: lst = [1,2,3,4,5,6,7,8]

In []: lst.reverse()

In []: lst

Out[]: [8, 7, 6, 5, 4, 3, 2, 1]

In []: lst.extend([0, -1, -2])

In []: lst

Out[]: [8, 7, 6, 5, 4, 3, 2, 1, 0, -1]

In []: lst.remove(0)

In []: lst

Out[]: [8, 7, 6, 5, 4, 3, 2, 1, -1]

\end{lstlisting}

\end{frame}

\begin{frame}[fragile]

\frametitle{List containership}