Merged branches from Madhusudan C.S.
authorSantosh G. Vattam <vattam.santosh@gmail.com>
Wed, 07 Oct 2009 00:50:06 +0530
changeset 48 7f4c51382f89
parent 47 21de307e6823 (current diff)
parent 46 63704b5650f1 (diff)
child 49 2adb90f9e287
child 52 fccb3551c7d5
Merged branches from Madhusudan C.S.
day1/Session-1.tex
day1/Session-3.tex
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+PDF statistics:
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+
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/day1/Session-1.nav	Wed Oct 07 00:50:06 2009 +0530
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--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/day1/Session-1.out	Wed Oct 07 00:50:06 2009 +0530
@@ -0,0 +1,7 @@
+\BOOKMARK [2][]{Outline0.1}{Agenda}{}
+\BOOKMARK [2][]{Outline0.2}{Agenda}{}
+\BOOKMARK [2][]{Outline0.3}{Overview}{}
+\BOOKMARK [2][]{Outline0.4}{Python}{}
+\BOOKMARK [3][]{Outline0.4.1.13}{Getting Started}{Outline0.4}
+\BOOKMARK [3][]{Outline0.4.2.22}{Data types}{Outline0.4}
+\BOOKMARK [3][]{Outline0.4.3.35}{Control flow}{Outline0.4}
Binary file day1/Session-1.pdf has changed
--- a/day1/Session-1.tex	Wed Oct 07 00:49:14 2009 +0530
+++ b/day1/Session-1.tex	Wed Oct 07 00:50:06 2009 +0530
@@ -2,7 +2,7 @@
 % Tutorial slides on Python.
 %
 % Author: Prabhu Ramachandran <prabhu at aero.iitb.ac.in>
-% Copyright (c) 2005-2008, Prabhu Ramachandran
+% Copyright (c) 2005-2009, Prabhu Ramachandran
 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 
 \documentclass[14pt,compress]{beamer}
@@ -75,7 +75,7 @@
 % Title page
 \title[Basic Python]{Python:\\A great programming toolkit}
 
-\author[Asokan \& Prabhu] {Asokan Pichai\\Prabhu Ramachandran}
+\author[FOSSEE Team] {Asokan Pichai\\Prabhu Ramachandran}
 
 \institute[IIT Bombay] {Department of Aerospace Engineering\\IIT Bombay}
 \date[] {Day 1, Session-1, 10, October 2009}
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/day1/Session-1.tex~	Wed Oct 07 00:50:06 2009 +0530
@@ -0,0 +1,636 @@
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+% Tutorial slides on Python.
+%
+% Author: Prabhu Ramachandran <prabhu at aero.iitb.ac.in>
+% Copyright (c) 2005-2008, Prabhu Ramachandran
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+
+\documentclass[14pt,compress]{beamer}
+%\documentclass[draft]{beamer}
+%\documentclass[compress,handout]{beamer}
+%\usepackage{pgfpages} 
+%\pgfpagesuselayout{2 on 1}[a4paper,border shrink=5mm]
+
+% Modified from: generic-ornate-15min-45min.de.tex
+\mode<presentation>
+{
+  \usetheme{Warsaw}
+  \useoutertheme{split}
+  \setbeamercovered{transparent}
+}
+
+\usepackage[english]{babel}
+\usepackage[latin1]{inputenc}
+%\usepackage{times}
+\usepackage[T1]{fontenc}
+
+% Taken from Fernando's slides.
+\usepackage{ae,aecompl}
+\usepackage{mathpazo,courier,euler}
+\usepackage[scaled=.95]{helvet}
+
+\definecolor{darkgreen}{rgb}{0,0.5,0}
+
+\usepackage{listings}
+\lstset{language=Python,
+    basicstyle=\ttfamily,
+    commentstyle=\color{red}\itshape,
+  stringstyle=\color{darkgreen},
+  showstringspaces=false,
+  keywordstyle=\color{blue}\bfseries}
+
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+% Macros
+\setbeamercolor{emphbar}{bg=blue!20, fg=black}
+\newcommand{\emphbar}[1]
+{\begin{beamercolorbox}[rounded=true]{emphbar} 
+      {#1}
+ \end{beamercolorbox}
+}
+\newcounter{time}
+\setcounter{time}{0}
+\newcommand{\inctime}[1]{\addtocounter{time}{#1}{\tiny \thetime\ m}}
+
+\newcommand{\typ}[1]{\texttt{#1}}
+
+\newcommand{\kwrd}[1]{ \texttt{\textbf{\color{blue}{#1}}}  }
+
+%%% This is from Fernando's setup.
+% \usepackage{color}
+% \definecolor{orange}{cmyk}{0,0.4,0.8,0.2}
+% % Use and configure listings package for nicely formatted code
+% \usepackage{listings}
+% \lstset{
+%    language=Python,
+%    basicstyle=\small\ttfamily,
+%    commentstyle=\ttfamily\color{blue},
+%    stringstyle=\ttfamily\color{orange},
+%    showstringspaces=false,
+%    breaklines=true,
+%    postbreak = \space\dots
+% }
+
+
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+% Title page
+\title[Basic Python]{Python:\\A great programming toolkit}
+
+\author[FOSSEE Team] {Asokan Pichai\\Prabhu Ramachandran}
+
+\institute[IIT Bombay] {Department of Aerospace Engineering\\IIT Bombay}
+\date[] {10, October 2009}
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+
+%\pgfdeclareimage[height=0.75cm]{iitmlogo}{iitmlogo}
+%\logo{\pgfuseimage{iitmlogo}}
+
+
+%% Delete this, if you do not want the table of contents to pop up at
+%% the beginning of each subsection:
+\AtBeginSubsection[]
+{
+  \begin{frame}<beamer>
+    \frametitle{Outline}
+    \tableofcontents[currentsection,currentsubsection]
+  \end{frame}
+}
+
+
+% If you wish to uncover everything in a step-wise fashion, uncomment
+% the following command: 
+%\beamerdefaultoverlayspecification{<+->}
+
+%\includeonlyframes{current,current1,current2,current3,current4,current5,current6}
+
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+% DOCUMENT STARTS
+\begin{document}
+
+\begin{frame}
+  \titlepage
+\end{frame}
+\begin{frame}
+  {Acknowledgements}
+  \begin{center}
+  This program is conducted by\\
+  IIT, Bombay\\
+  through CDEEP\\as part of  the open source initiatives\\
+  under the aegis of\\
+  \alert{National Mission on Education through ICT,} \\
+  Ministry of HRD.
+  \end{center}
+\end{frame}
+
+\begin{frame}
+  \frametitle{Outline}
+  \tableofcontents
+  % You might wish to add the option [pausesections]
+\end{frame}
+
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+% TODO
+%
+%  * Add slide on Python packages (modules)
+%  * Add slides on reference counting.
+
+\section{Agenda}
+\begin{frame}{About the Workshop}
+  \begin{description}
+	\item[Day 1, Session 1] Sat 09:30--11:00
+	\item[Day 1, Session 2] Sat 11:15--12:45
+	\item[Day 1, Session 3] Sat 13:45--15:15
+	\item[Day 1, Session 4] Sat 15:30--17:00
+        \item[Day 2, Session 1] Sun 09:30--11:00
+	\item[Day 2, Session 2] Sun 11:15--12:45
+	\item[Day 2, Session 3] Sun 13:45--15:15
+	\item[Day 2, Session 4] Sun 15:30--17:00
+  \end{description}
+\end{frame}
+
+\section{Agenda}
+\begin{frame}{About the Workshop}
+  \begin{block}{Goal of the workshop}
+	Successful participants will be able to use python as their scripting and problem solving language. 
+  \end{block}
+  \begin{block}{Workshop Audience}
+        Aimed at Engg., Mathematics and Science teachers  but should serve a similar purpose for others. 
+  \end{block}
+  \begin{block}{Focus of the workshop}
+        Focus on basic numerics and plotting
+  \end{block}
+\end{frame}
+
+\begin{frame}{Checklist}
+	\begin{block}{python}
+          Type python at the command line. Do you see version 2.5 or later?
+        \end{block}
+        \begin{block}{IPython}
+          Is IPython available?
+        \end{block}
+        \begin{block}{Editor}
+          Which editor? scite, vim, emacs, \ldots
+        \end{block}
+\end{frame}
+
+\section{Overview}
+\begin{frame}{Session 1}
+  \begin{itemize}
+	\item Introduction and motivation
+	\item Using the interpreter(s)
+	\item Basic data types: int, float, string
+	\item Basic data structures: list
+	\item Basic console IO: \texttt{raw\_input(), print}
+    \item Basic control flow: \texttt{if, while}
+	\item Problem set 1
+    \item Functions $\rightarrow$ Problem set 2
+    \item lists, \texttt{for}  $\rightarrow$ Problem set 3
+    \item IO, Modules $\rightarrow$ Problem sets 4,5, \ldots
+  \end{itemize}
+\end{frame}
+
+\begin{frame}
+  \frametitle{Introduction}
+  \begin{itemize}
+  \item Creator and BDFL: Guido van Rossum
+  \item December 1989
+  \item ``Python'' as in Monty Python's Flying Circus
+  \item 2.6.x
+  \item PSF license (like BSD: no strings attached)
+  \item Highly cross platform
+  \item Nokia series 60!
+  \item \alert{Philosophy:} Simple and complete by design
+  \end{itemize}
+\end{frame}
+
+\begin{frame}
+  \frametitle{Resources}
+  \begin{itemize}
+  \item Part of many GNU/Linux distributions
+  \item Web: \url{http://www.python.org}
+  \item Doc: \url{http://www.python.org/doc}
+  \item Free Tutorials:
+    \begin{itemize}
+    \item Official Python tutorial: \url{http://docs.python.org/tut/tut.html}
+    \item Byte of Python: \url{http://www.byteofpython.info/}
+    \item Dive into Python: \url{http://diveintopython.org/}
+    \end{itemize}
+  \end{itemize}
+\end{frame}
+
+\begin{frame}
+  \frametitle{Why Python?}
+  \begin{itemize}
+  \item Readable and easy to use
+  \item High level, interpreted, modular, OO
+  \item Much faster development cycle
+  \item Powerful interactive environment
+  \item Rapid application development
+  \item Rich standard library and modules
+  \item Interfaces well with C++, C and FORTRAN
+  \item \alert{More than a math package $\Rightarrow$ some extra work compared to math packages}
+  \end{itemize}
+\end{frame}
+
+\begin{frame}
+  \frametitle{Use cases}
+  \begin{itemize}
+  \item NASA: Space Shuttle Mission Design
+  \item AstraZeneca: Collaborative Drug Discovery
+  \item ForecastWatch.com: Helps Meteorologists
+  \item Industrial Light \& Magic: Runs on Python
+  \item Zope: Commercial grade Toolkit
+  \item Plone: Professional high feature CMS
+  \item RedHat: install scripts, sys-admin tools
+  \item Django: A great web application framework
+  \item Google: A strong python shop
+  \end{itemize}
+\end{frame}
+
+\begin{frame}
+  \frametitle{To sum up, python is\ldots}
+  \begin{itemize}
+  \item dynamically typed, interpreted $\rightarrow$ rapid testing/prototyping
+  \item powerful, very high level
+  \item has full introspection 
+  \item Did we mention powerful?
+  \end{itemize}
+  \begin{block}{But \ldots}
+    may be wanting in performance. specialised resources such as SWIG, \alert{Cython} are available 
+  \end{block}
+  \inctime{15}
+\end{frame}
+
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+% TIME: 10 m, running 10m
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+
+\section{Python}
+
+\subsection{Getting Started}
+
+\begin{frame}[fragile]{At the prompt, type the following}
+   \begin{lstlisting}
+>>> print 'Hello Python' 
+>>> print 3124 * 126789
+>>> 1786 % 12
+>>> 3124 * 126789
+>>> a = 3124 * 126789
+>>> big = 12345678901234567890 ** 3
+>>> verybig = big * big * big * big 
+>>> 12345**6, 12345**67, 12345**678
+  \end{lstlisting}
+\end{frame}
+
+\begin{frame}[fragile]{At the prompt, type the following}
+   \begin{lstlisting}
+>>> s = 'Hello '
+>>> p = 'World'
+>>> s + p 
+>>> s * 12 
+>>> s * s
+>>> s + p * 12, (s + p)* 12
+>>> s * 12 + p * 12
+>>> 12 * s 
+    \end{lstlisting}
+\end{frame}
+
+\begin{frame}[fragile]{At the prompt, type the following}
+  \begin{lstlisting}
+>>> 17/2
+>>> 17/2.0
+>>> 17.0/2
+>>> 17.0/8.5
+>>> int(17/2.0)
+>>> float(17/2)
+>>> str(17/2.0)
+>>> round( 7.5 )
+  \end{lstlisting}
+  \begin{block}{Mini exercise}
+	Round a float to the nearest integer, using \texttt{int()}?
+  \end{block}
+\end{frame}
+
+\begin{frame}{Midi exercises}
+  \begin{center}
+    \begin{itemize}
+      \item What does this do?
+      \item \texttt{round(amount * 10) /10.0 }
+    \end{itemize}
+  \end{center}
+\end{frame}
+
+\begin{frame}{More exercises?}
+  \begin{center}
+    \begin{block}{Round sums}
+      How to round a number to the nearest  5 paise?\\
+      \begin{description}
+        \item[Remember] 17.23 $\rightarrow$ 17.25,\\ while 17.22 $\rightarrow$ 17.20\\
+      \end{description}
+      How to round a number to the nearest 20 paise?
+    \end{block}
+  \end{center}
+\end{frame}
+
+\begin{frame}[fragile] {A question of good style}
+  \begin{lstlisting}
+    amount = 12.68
+    denom = 0.05
+    nCoins = round(amount/denom)
+    rAmount = nCoins * denom
+  \end{lstlisting}
+  \pause
+  \begin{block}{Style Rule \#1}
+    Naming is 80\% of programming
+  \end{block}
+\end{frame}
+
+
+\begin{frame}[fragile]
+  \frametitle{Odds and ends}
+  \begin{itemize}
+    \item Case sensitive
+    \item Dynamically typed $\Rightarrow$ need not specify a type
+      \begin{lstlisting}
+a = 1
+a = 1.1
+a = "Now I am a string!"
+      \end{lstlisting}
+    \item Comments:
+      \begin{lstlisting}
+a = 1  # In-line comments
+# Comment in a line to itself.
+a = "# This is not a comment!"
+      \end{lstlisting}
+  \end{itemize}
+  \inctime{15}
+\end{frame}
+
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+% TIME: 10 m, running 20m
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+
+\subsection{Data types}
+\begin{frame}
+  \frametitle{Basic types}
+  \begin{itemize}
+    \item Numbers: float, int, long, complex
+    \item Strings
+    \item Boolean
+  \end{itemize}
+  \begin{block}{Also to be discussed later}
+    tuples, lists, dictionaries, functions, objects\ldots
+  \end{block}
+\end{frame}
+
+\begin{frame}[fragile]
+  \frametitle{Numbers}
+  \vspace*{-0.25in}
+  \begin{lstlisting}
+>>> a = 1 # Int.
+>>> l = 1000000L # Long
+>>> e = 1.01325e5 # float
+>>> f = 3.14159 # float
+>>> c = 1+1j # Complex!
+>>> print f*c/a
+(3.14159+3.14159j)
+>>> print c.real, c.imag
+1.0 1.0
+>>> abs(c)
+1.4142135623730951
+>>> abs( 8 - 9.5 )
+1.5
+  \end{lstlisting}
+\end{frame}
+
+\begin{frame}[fragile]
+  \frametitle{Boolean}
+  \begin{lstlisting}
+>>> t = True
+>>> f = not t
+False
+>>> f or t
+True
+>>> f and t
+False
+  \end{lstlisting}
+  \begin{block}{Try:}
+  NOT True\\
+  not TRUE
+  \end{block}
+\end{frame}
+
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+% TIME: 10 m, running 30m
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+
+\begin{frame}[fragile]
+  \frametitle{Relational and logical operators}
+  \begin{lstlisting}
+>>> a, b, c = -1, 0, 1
+>>> a == b
+False
+>>> a <= b 
+True
+>>> a + b != c
+True
+>>> a < b < c
+True
+>>> c >= a + b
+True
+  \end{lstlisting}
+\end{frame}
+
+\begin{frame}[fragile]
+  \frametitle{Strings}
+  \begin{lstlisting}
+s = 'this is a string'
+s = 'This one has "quotes" inside!'
+s = "I have 'single-quotes' inside!"
+l = "A string spanning many lines\
+one more line\
+yet another"
+t = """A triple quoted string does
+not need to be escaped at the end and 
+"can have nested quotes" etc."""
+  \end{lstlisting}
+\end{frame}
+
+\begin{frame}[fragile]
+  \frametitle{More Strings}
+  \vspace*{-0.2in}
+  \begin{lstlisting}
+>>> w = "hello"    
+>>> print w[0] + w[2] + w[-1]
+hlo
+>>> len(w) # guess what
+5
+>>> s = u'Unicode strings!'
+>>> # Raw strings (note the leading 'r')
+... r_s = r'A string $\alpha \nu$'
+  \end{lstlisting}
+\pause
+  \begin{lstlisting}
+>>> w[0] = 'H' # Can't do that!
+Traceback (most recent call last):
+  File "<stdin>", line 1, in ?
+TypeError: object does not support item assignment
+  \end{lstlisting}
+\end{frame}
+
+\begin{frame}
+  \frametitle{Let us switch to IPython}
+  Why?
+  \begin{block}
+    {Better help (and a lot more)}
+    Tab completion\\
+    ?\\
+    .?\\
+    object.function?
+  \end{block}
+\end{frame}
+
+\begin{frame}[fragile]
+  \frametitle{More on strings}
+  \begin{lstlisting}
+In [1]: a = 'hello world'
+In [2]: a.startswith('hell')
+Out[2]: True
+In [3]: a.endswith('ld')
+Out[3]: True
+In [4]: a.upper()
+Out[4]: 'HELLO WORLD'
+In [5]: a.upper().lower()
+Out[5]: 'hello world'
+  \end{lstlisting}
+\end{frame}
+
+\begin{frame}[fragile]{Still with strings}
+  \begin{lstlisting}
+In [6]: a.split()
+Out[6]: ['hello', 'world']
+In [7]: ''.join(['a', 'b', 'c'])
+Out[7]: 'abc'
+In [8] 'd' in ''.join( 'a', 'b', 'c')
+Out[8]: False
+  \end{lstlisting}
+  \begin{block}{Try:}
+    \texttt{a.split( 'o' )}\\
+    \texttt{'x'.join( a.split( 'o' ) )}
+  \end{block}
+\end{frame}
+
+\begin{frame}[fragile]{Surprise! strings!!}
+  \begin{lstlisting}
+In [11]: x, y = 1, 1.2
+In [12]: 'x is %s, y is %s' %(x, y)
+Out[12]: 'x is 1, y is 1.234'
+  \end{lstlisting}
+  \begin{block}{Try:}
+    \texttt{'x is \%d, y is \%f' \%(x, y) }\\
+    \texttt{'x is \%3d, y is \%4.2f' \%(x, y) }
+  \end{block}
+  \small
+\url{docs.python.org/lib/typesseq-strings.html}\\
+\end{frame}
+
+\begin{frame}
+  {Interlude}
+  \begin{block}
+    {A classic problem}
+    How to interchange values of two variables? Please note that the type of either variable is unknown and it is not necessary that both be of the same type even!
+  \end{block}
+  \inctime{30}
+\end{frame}
+
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+% TIME: 25 m+ Interlude break 5 mins, running 60m 
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+
+\subsection{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}
+
+\begin{frame}[fragile]
+  \frametitle{Basic conditional flow}
+  \begin{lstlisting}
+In [21]: a = 7
+In [22]: b = 8
+In [23]: if a > b:
+   ....:    print 'Hello'
+   ....: else:
+   ....:     print 'World'
+   ....:
+   ....:
+World
+  \end{lstlisting}
+  Let us switch to creating a file
+\end{frame}
+
+\begin{frame}
+  {Creating python files}
+  \begin{itemize}
+    \item aka scripts
+    \item use your editor
+    \item Note that white space is the way to specify blocks!
+    \item extension \typ{.py}
+    \item run with \texttt{python hello.py} at the command line
+    \item in IPython\ldots
+  \end{itemize}
+\end{frame}
+
+\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}
+
+\begin{frame}{Simple IO}
+  \begin{block}
+    {Console Input}
+    \texttt{raw\_input()} waits for user input.\\Prompt string is optional.\\
+    All keystrokes are Strings!\\\texttt{int()} converts string to int.
+  \end{block}
+  \begin{block}
+    {Console output}
+    \texttt{print} is straight forward. Major point to remember is the distinction between \texttt{print x} and \texttt{print x,}
+  \end{block}
+\end{frame}
+
+\begin{frame}[fragile]
+  \frametitle{Basic looping}
+  \begin{lstlisting}
+# Fibonacci series:
+# 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}\\  
+\alert{Recall it is easy to write infinite loops with \kwrd{while}}
+  \inctime{20}
+\end{frame}
+
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+% TIME: 20 m, running 80m 
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+\end{document}
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/day1/Session-1.toc	Wed Oct 07 00:50:06 2009 +0530
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+\beamer@sectionintoc {2}{Agenda}{5}{0}{2}
+\beamer@sectionintoc {3}{Overview}{7}{0}{3}
+\beamer@sectionintoc {4}{Python}{13}{0}{4}
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--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/day1/Session-1.vrb	Wed Oct 07 00:50:06 2009 +0530
@@ -0,0 +1,14 @@
+\frametitle {Basic looping}
+  \begin{lstlisting}
+# Fibonacci series:
+# 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}\\
+\alert{Recall it is easy to write infinite loops with \kwrd{while}}
+  \inctime{20}
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+Output written on Session-2.pdf (37 pages, 317195 bytes).
+PDF statistics:
+ 1233 PDF objects out of 1440 (max. 8388607)
+ 79 named destinations out of 1000 (max. 131072)
+ 129 words of extra memory for PDF output out of 10000 (max. 10000000)
+
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/day1/Session-2.nav	Wed Oct 07 00:50:06 2009 +0530
@@ -0,0 +1,80 @@
+\beamer@endinputifotherversion {3.07pt}
+\headcommand {\slideentry {0}{0}{1}{1/1}{}{0}}
+\headcommand {\beamer@framepages {1}{1}}
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+\headcommand {\beamer@documentpages {37}}
+\headcommand {\def \inserttotalframenumber {34}}
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/day1/Session-2.out	Wed Oct 07 00:50:06 2009 +0530
@@ -0,0 +1,4 @@
+\BOOKMARK [2][]{Outline0.1}{Python}{}
+\BOOKMARK [3][]{Outline0.1.1.2}{Exercises on Control flow}{Outline0.1}
+\BOOKMARK [3][]{Outline0.1.2.9}{Functions}{Outline0.1}
+\BOOKMARK [3][]{Outline0.1.3.23}{Lists}{Outline0.1}
Binary file day1/Session-2.pdf has changed
--- a/day1/Session-2.tex	Wed Oct 07 00:49:14 2009 +0530
+++ b/day1/Session-2.tex	Wed Oct 07 00:50:06 2009 +0530
@@ -73,9 +73,9 @@
 
 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 % Title page
-\title[Basic Python]{Python:\\A great programming toolkit}
+\title[Basic Python]{Python:\\Functions and basic data structures}
 
-\author[Asokan \& Prabhu] {Asokan Pichai\\Prabhu Ramachandran}
+\author[FOSSEE Team] {Asokan Pichai\\Prabhu Ramachandran}
 
 \institute[IIT Bombay] {Department of Aerospace Engineering\\IIT Bombay}
 \date[] {10, October 2009}
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/day1/Session-2.tex~	Wed Oct 07 00:50:06 2009 +0530
@@ -0,0 +1,511 @@
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+% Tutorial slides on Python.
+%
+% Author: Prabhu Ramachandran <prabhu at aero.iitb.ac.in>
+% Copyright (c) 2005-2009, Prabhu Ramachandran
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+
+\documentclass[14pt,compress]{beamer}
+%\documentclass[draft]{beamer}
+%\documentclass[compress,handout]{beamer}
+%\usepackage{pgfpages} 
+%\pgfpagesuselayout{2 on 1}[a4paper,border shrink=5mm]
+
+% Modified from: generic-ornate-15min-45min.de.tex
+\mode<presentation>
+{
+  \usetheme{Warsaw}
+  \useoutertheme{split}
+  \setbeamercovered{transparent}
+}
+
+\usepackage[english]{babel}
+\usepackage[latin1]{inputenc}
+%\usepackage{times}
+\usepackage[T1]{fontenc}
+
+% Taken from Fernando's slides.
+\usepackage{ae,aecompl}
+\usepackage{mathpazo,courier,euler}
+\usepackage[scaled=.95]{helvet}
+
+\definecolor{darkgreen}{rgb}{0,0.5,0}
+
+\usepackage{listings}
+\lstset{language=Python,
+    basicstyle=\ttfamily\bfseries,
+    commentstyle=\color{red}\itshape,
+  stringstyle=\color{darkgreen},
+  showstringspaces=false,
+  keywordstyle=\color{blue}\bfseries}
+
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+% Macros
+\setbeamercolor{emphbar}{bg=blue!20, fg=black}
+\newcommand{\emphbar}[1]
+{\begin{beamercolorbox}[rounded=true]{emphbar} 
+      {#1}
+ \end{beamercolorbox}
+}
+\newcounter{time}
+\setcounter{time}{0}
+\newcommand{\inctime}[1]{\addtocounter{time}{#1}{\tiny \thetime\ m}}
+
+\newcommand{\typ}[1]{\texttt{#1}}
+
+\newcommand{\kwrd}[1]{ \texttt{\textbf{\color{blue}{#1}}}  }
+
+%%% This is from Fernando's setup.
+% \usepackage{color}
+% \definecolor{orange}{cmyk}{0,0.4,0.8,0.2}
+% % Use and configure listings package for nicely formatted code
+% \usepackage{listings}
+% \lstset{
+%    language=Python,
+%    basicstyle=\small\ttfamily,
+%    commentstyle=\ttfamily\color{blue},
+%    stringstyle=\ttfamily\color{orange},
+%    showstringspaces=false,
+%    breaklines=true,
+%    postbreak = \space\dots
+% }
+
+
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+% Title page
+\title[Basic Python]{Python:\\Functions and basic data structures}
+
+\author[FOSSEE Team] {Asokan Pichai\\Prabhu Ramachandran}
+
+\institute[FOSSEE] {FOSSEE Team}
+\date[] {10, October 2009}
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+
+%\pgfdeclareimage[height=0.75cm]{iitmlogo}{iitmlogo}
+%\logo{\pgfuseimage{iitmlogo}}
+
+
+%% Delete this, if you do not want the table of contents to pop up at
+%% the beginning of each subsection:
+\AtBeginSubsection[]
+{
+  \begin{frame}<beamer>
+    \frametitle{Outline}
+    \tableofcontents[currentsection,currentsubsection]
+  \end{frame}
+}
+
+
+% If you wish to uncover everything in a step-wise fashion, uncomment
+% the following command: 
+%\beamerdefaultoverlayspecification{<+->}
+
+%\includeonlyframes{current,current1,current2,current3,current4,current5,current6}
+
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+% DOCUMENT STARTS
+\begin{document}
+
+\begin{frame}
+  \titlepage
+\end{frame}
+
+\section{Python}
+
+\subsection{Exercises on Control flow}
+\begin{frame}
+  \frametitle{Problem set 1}
+  \begin{itemize}
+    \item All the problems can be\\
+      solved using \kwrd{if} and \kwrd{while} 
+  \end{itemize}
+\end{frame}
+
+\begin{frame}{Problem 1.1}
+  Write a program that displays all three digit numbers that are equal to the sum of the cubes of their digits. That is, print numbers $abc$ that have the property $abc = a^3 + b^3 + c^3$\\
+These are called $Armstrong$ numbers.
+\end{frame}
+  
+\begin{frame}{Problem 1.2 - Collatz sequence}
+\begin{enumerate}
+  \item Start with an arbitrary (positive) integer. 
+  \item If the number is even, divide by 2; if the number is odd, multiply by 3 and add 1.
+  \item Repeat the procedure with the new number.
+  \item It appears that for all starting values there is a cycle of 4, 2, 1 at which the procedure loops.
+\end{enumerate}
+    Write a program that accepts the starting value and prints out the Collatz sequence.
+
+\end{frame}
+
+\begin{frame}{Problem 1.3 - Kaprekar's constant}
+  \begin{enumerate}
+    \item Take a four digit number--with at least two digits different.
+    \item Arrange the digits in ascending and descending order, giving A and D respectively.
+    \item Leave leading zeros in A!
+    \item Subtract A from D.
+    \item With the result, repeat from step 2.
+  \end{enumerate}
+  Write a program to accept a 4-digit number and display the progression to Kaprekar's constant.
+\end{frame}
+
+\begin{frame}[fragile]{Problem 1.4}
+  Write a program that prints the following pyramid on the screen. 
+  \begin{lstlisting}
+1
+2  2
+3  3  3
+4  4  4  4
+  \end{lstlisting}
+The number of lines must be obtained from the user as input.\\
+\pause
+When can your code fail?
+\only<2->{\inctime{20}}
+\end{frame}
+
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+% TIME: 20 m, running 20m 
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+
+\subsection{Functions}
+\begin{frame}[fragile]
+\frametitle{Functions: examples}
+  \begin{lstlisting}
+def signum( r ):
+    """returns 0 if r is zero
+    -1 if r is negative
+    +1 if r is positive"""
+    if r < 0:
+        return -1
+    elif r > 0:
+        return 1
+    else:
+        return 0
+  \end{lstlisting}
+\end{frame}
+
+\begin{frame}[fragile]
+  \frametitle{Functions: examples}
+  \begin{lstlisting}
+def pad( n, size ): 
+    """pads integer n with spaces
+    into a string of length size
+    """
+    SPACE = ' '
+    s = str( n )
+    padSize = size - len( s )
+    return padSize * SPACE + s
+  \end{lstlisting}
+\pause
+What about \%3d?
+\end{frame}
+
+\begin{frame}[fragile]
+  {What does this function do?}
+  \begin{lstlisting}
+def what( n ):
+    if n < 0: n = -n
+    while n > 0:
+        if n % 2 == 1:
+            return False
+        n /= 10
+    return True
+  \end{lstlisting}
+\end{frame}
+
+\begin{frame}[fragile]
+  {What does this function do?}
+\begin{lstlisting}
+def what( n ):
+    i = 1    
+    while i * i < n:
+        i += 1
+    return i * i == n, i
+  \end{lstlisting}
+\end{frame}
+
+\begin{frame}[fragile]
+  {What does this function do?}
+  \begin{lstlisting}
+def what( n, x ):
+    z = 1.0
+    if n < 0:
+        x = 1.0 / x
+        n = -n
+    while n > 0:
+        if n % 2 == 1:
+            z *= x
+        n /= 2
+        x *= x
+    return z
+  \end{lstlisting}
+\end{frame}
+
+\begin{frame}
+  {Before writing a function}
+  \begin{itemize}
+      \item Builtin functions for various and sundry
+      \item \typ{abs, any, all, len, max, min}
+      \item \typ{pow, range, sum, type}
+      \item Refer here:
+          \url{http://docs.python.org/library/functions.html}
+  \end{itemize}
+  \inctime{10} 
+\end{frame}
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+% TIME: 10 m, running 30m 
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+
+\begin{frame}{Problem set 2}
+  The focus is on writing functions and calling them.
+\end{frame}
+
+\begin{frame}{Problem 2.1}
+  Write a function to return the gcd of two numbers.
+\end{frame}
+
+\begin{frame}{Problem 2.2}
+A pythagorean triad $(a,b,c)$ has the property $a^2 + b^2 = c^2$.\\By primitive we mean triads that do not `depend' on others. For example, (4,3,5) is a variant of (3,4,5) and hence is not primitive. And (10,24,26) is easily derived from (5,12,13) and should not be displayed by our program. \\
+Write a program to print primitive pythagorean triads. The program should generate all triads with a, b values in the range 0---100
+\end{frame}
+
+\begin{frame}{Problem 2.3}
+  Write a program that generates a list of all four digit numbers that have all their digits even and are perfect squares.\\For example, the output should include 6400 but not 8100 (one digit is odd) or 4248 (not a perfect square).
+\end{frame}
+
+\begin{frame}{Problem 2.4}
+  The aliquot of a number is defined as: the sum of the \emph{proper} divisors of the number. For example, the aliquot(12) = 1 + 2 + 3 + 4 + 6 = 16.\\
+  Write a function that returns the aliquot number of a given number. 
+\end{frame}
+
+\begin{frame}{Problem 2.5}
+  A pair of numbers (a, b) is said to be \alert{amicable} if the aliquot number of a is b and the aliquot number of b is a.\\
+  Example: \texttt{220, 284}\\
+  Write a program that prints all five digit amicable pairs.
+  \inctime{25}
+\end{frame}
+
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+% TIME: 25 m, running 55m 
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+
+\subsection{Lists}
+
+\begin{frame}[fragile]
+  \frametitle{List creation and indexing}
+\begin{lstlisting}
+>>> a = [] # An empty list.
+>>> a = [1, 2, 3, 4] # More useful.
+>>> len(a) 
+4
+>>> a[0] + a[1] + a[2] + a[-1]
+10
+\end{lstlisting}
+  \begin{itemize}
+  \item Indices start with ?
+  \item Negative indices indicate ?
+  \end{itemize}
+\end{frame}
+
+\begin{frame}[fragile]
+  \frametitle{List: slices}
+  \begin{itemize}
+  \item Slicing is a basic operation
+  \item \typ{list[initial:final:step]}
+  \item  The step is optional
+  \end{itemize}
+\begin{lstlisting}
+>>> a[1:3] # A slice.
+[2, 3]
+>>> a[1:-1]
+[2, 3]
+>>> a[1:] == a[1:-1]
+False  
+\end{lstlisting}
+Explain last result
+\end{frame}
+
+\begin{frame}[fragile]
+  \frametitle{List: more slices}
+\begin{lstlisting}
+>>> a[0:-1:2] # Notice the step!
+[1, 3]
+>>> a[::2]
+[1, 3]
+>>> a[-1::-1]
+\end{lstlisting}
+What do you think the last one will do?
+  \emphbar{Note: Strings also use same indexing and slicing.}
+\end{frame}
+
+\begin{frame}[fragile]
+  \frametitle{List: examples}
+\begin{lstlisting}
+>>> a = [1, 2, 3, 4]
+>>> a[:2]
+[1, 2]
+>>> a[0:-1:2]
+[1, 3]
+\end{lstlisting}
+\pause
+\alert{Lists are mutable (unlike strings)}
+\begin{lstlisting}
+>>> a[1] = 20
+>>> a
+[1, 20, 3, 4]
+\end{lstlisting}
+\end{frame}
+
+\begin{frame}[fragile]
+  \frametitle{Lists are mutable and heterogenous}
+\begin{lstlisting}
+>>> a = ['spam', 'eggs', 100, 1234]
+>>> a[2] = a[2] + 23
+>>> a
+['spam', 'eggs', 123, 1234]
+>>> a[0:2] = [1, 12] # Replace items
+>>> a
+[1, 12, 123, 1234]
+>>> a[0:2] = [] # Remove items
+>>> a.append( 12345 )
+>>> a
+[123, 1234, 12345]
+\end{lstlisting}
+\inctime{10}
+\end{frame}
+
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+% TIME: 10 m, running 65m 
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+
+\begin{frame}[fragile]
+  \frametitle{List methods}
+\begin{lstlisting}
+>>> a = ['spam', 'eggs', 1, 12]
+>>> a.reverse() # in situ
+>>> a
+[12, 1, 'eggs', 'spam']
+>>> a.append(['x', 1])
+>>> a
+[12, 1, 'eggs', 'spam', ['x', 1]]
+>>> a.extend([1,2]) # Extend the list.
+>>> a.remove( 'spam' )
+>>> a
+[12, 1, 'eggs', ['x', 1], 1, 2]
+\end{lstlisting}
+\end{frame}
+
+\begin{frame}[fragile]
+  \frametitle{List containership}
+  \begin{lstlisting}
+>>> a = ['cat', 'dog', 'rat', 'croc']
+>>> 'dog' in a
+True
+>>> 'snake' in a
+False
+>>> 'snake' not in a
+True
+>>> 'ell' in 'hello world'
+True
+  \end{lstlisting}
+  \inctime{5}
+\end{frame}
+
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+% TIME: 5 m, running 70m 
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+
+\begin{frame}[fragile]
+  \frametitle{Tuples: immutable}
+\begin{lstlisting}
+>>> t = (0, 1, 2)
+>>> print t[0], t[1], t[2], t[-1] 
+0 1 2 2
+>>> t[0] = 1
+Traceback (most recent call last):
+  File "<stdin>", line 1, in ?
+TypeError: object does not support item assignment
+\end{lstlisting}  
+\begin{itemize}
+    \item Multiple return values are actually a tuple.
+    \item Exchange is tuple (un)packing
+\end{itemize}
+\inctime{5}
+\end{frame}
+
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+% TIME: 5 m, running 75m 
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+
+\begin{frame}[fragile]
+  \frametitle{\typ{range()} function}
+  \begin{lstlisting}
+>>> range(7)
+[0, 1, 2, 3, 4, 5, 6]
+>>> range( 3, 9)
+[3, 4, 5, 6, 7, 8]
+>>> range( 4, 17, 3)
+[4, 7, 10, 13, 16]
+>>> range( 5, 1, -1)
+[5, 4, 3, 2]
+>>> range( 8, 12, -1)
+[]
+  \end{lstlisting}
+\end{frame}
+
+\begin{frame}[fragile]
+  \frametitle{\typ{for\ldots range(\ldots)} idiom}
+  \begin{lstlisting}
+In [83]: for i in range(5):
+   ....:     print i, i * i
+   ....:     
+   ....:     
+0 0
+1 1
+2 4
+3 9
+4 16
+\end{lstlisting}
+\end{frame}
+
+\begin{frame}[fragile]
+  \frametitle{\typ{for}: the list companion}
+  
+  \begin{lstlisting}
+In [84]: a = ['a', 'b', 'c']
+In [85]: for x in a:
+   ....:    print x, chr( ord(x) + 10 )
+   ....:
+a  k
+b  l
+c  m
+  \end{lstlisting}
+  Iterating over the list and not the index + reference\\
+  what if you want the index?
+\end{frame}
+
+\begin{frame}[fragile]
+  \frametitle{\typ{for}: the list companion}
+  \begin{lstlisting}
+In [89]: for p, ch in enumerate( a ):
+   ....:     print p, ch
+   ....:     
+   ....:     
+0 a
+1 b
+2 c
+  \end{lstlisting}
+Try: \typ{print enumerate(a)}
+\inctime{10}
+\end{frame}
+
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+% TIME: 10 m, running 85m 
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+
+\begin{frame}
+  \frametitle{Did we meet the goal?}
+  \tableofcontents
+  % You might wish to add the option [pausesections]
+\end{frame}
+
+\end{document}
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/day1/Session-2.toc	Wed Oct 07 00:50:06 2009 +0530
@@ -0,0 +1,6 @@
+\beamer@endinputifotherversion {3.07pt}
+\select@language {english}
+\beamer@sectionintoc {1}{Python}{2}{0}{1}
+\beamer@subsectionintoc {1}{1}{Exercises on Control flow}{2}{0}{1}
+\beamer@subsectionintoc {1}{2}{Functions}{9}{0}{1}
+\beamer@subsectionintoc {1}{3}{Lists}{23}{0}{1}
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/day1/Session-2.vrb	Wed Oct 07 00:50:06 2009 +0530
@@ -0,0 +1,12 @@
+\frametitle {\typ{for}: the list companion}
+  \begin{lstlisting}
+In [89]: for p, ch in enumerate( a ):
+   ....:     print p, ch
+   ....:
+   ....:
+0 a
+1 b
+2 c
+  \end{lstlisting}
+Try: \typ{print enumerate(a)}
+\inctime{10}
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/day1/Session-3.aux	Wed Oct 07 00:50:06 2009 +0530
@@ -0,0 +1,100 @@
+\relax 
+\ifx\hyper@anchor\@undefined
+\global \let \oldcontentsline\contentsline
+\gdef \contentsline#1#2#3#4{\oldcontentsline{#1}{#2}{#3}}
+\global \let \oldnewlabel\newlabel
+\gdef \newlabel#1#2{\newlabelxx{#1}#2}
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--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
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--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
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Binary file day1/Session-3.pdf has changed
--- a/day1/Session-3.tex	Wed Oct 07 00:49:14 2009 +0530
+++ b/day1/Session-3.tex	Wed Oct 07 00:50:06 2009 +0530
@@ -2,7 +2,7 @@
 % Tutorial slides on Python.
 %
 % Author: Prabhu Ramachandran <prabhu at aero.iitb.ac.in>
-% Copyright (c) 2005-2008, Prabhu Ramachandran
+% Copyright (c) 2005-2009, Prabhu Ramachandran
 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 
 \documentclass[14pt,compress]{beamer}
@@ -73,9 +73,9 @@
 
 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 % Title page
-\title[Basic Python]{Python:\\A great programming toolkit}
+\title[Basic Python]{Python:\\Modular Code, Handling Files and Objects}
 
-\author[Asokan \& Prabhu] {Asokan Pichai\\Prabhu Ramachandran}
+\author[FOSSEE Team] {Asokan Pichai\\Prabhu Ramachandran}
 
 \institute[IIT Bombay] {Department of Aerospace Engineering\\IIT Bombay}
 \date[] {Day 1, Session-3, 10, October 2009}
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/day1/Session-3.tex~	Wed Oct 07 00:50:06 2009 +0530
@@ -0,0 +1,423 @@
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+% Tutorial slides on Python.
+%
+% Author: Prabhu Ramachandran <prabhu at aero.iitb.ac.in>
+% Copyright (c) 2005-2008, Prabhu Ramachandran
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+
+\documentclass[14pt,compress]{beamer}
+%\documentclass[draft]{beamer}
+%\documentclass[compress,handout]{beamer}
+%\usepackage{pgfpages} 
+%\pgfpagesuselayout{2 on 1}[a4paper,border shrink=5mm]
+
+% Modified from: generic-ornate-15min-45min.de.tex
+\mode<presentation>
+{
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+}
+
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+\definecolor{darkgreen}{rgb}{0,0.5,0}
+
+\usepackage{listings}
+\lstset{language=Python,
+    basicstyle=\ttfamily,
+    commentstyle=\color{red}\itshape,
+  stringstyle=\color{darkgreen},
+  showstringspaces=false,
+  keywordstyle=\color{blue}\bfseries}
+
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+% Macros
+\setbeamercolor{emphbar}{bg=blue!20, fg=black}
+\newcommand{\emphbar}[1]
+{\begin{beamercolorbox}[rounded=true]{emphbar} 
+      {#1}
+ \end{beamercolorbox}
+}
+\newcounter{time}
+\setcounter{time}{0}
+\newcommand{\inctime}[1]{\addtocounter{time}{#1}{\tiny \thetime\ m}}
+
+\newcommand{\typ}[1]{\texttt{#1}}
+
+\newcommand{\kwrd}[1]{ \texttt{\textbf{\color{blue}{#1}}}  }
+
+%%% This is from Fernando's setup.
+% \usepackage{color}
+% \definecolor{orange}{cmyk}{0,0.4,0.8,0.2}
+% % Use and configure listings package for nicely formatted code
+% \usepackage{listings}
+% \lstset{
+%    language=Python,
+%    basicstyle=\small\ttfamily,
+%    commentstyle=\ttfamily\color{blue},
+%    stringstyle=\ttfamily\color{orange},
+%    showstringspaces=false,
+%    breaklines=true,
+%    postbreak = \space\dots
+% }
+
+
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+% Title page
+\title[Basic Python]{Python:\\Modular Code, Handling Files and Objects}
+
+\author[FOSSEE Team] {Asokan Pichai\\Prabhu Ramachandran}
+
+\institute[IIT Bombay] {Department of Aerospace Engineering\\IIT Bombay}
+\date[] {10, October 2009}
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+
+%\pgfdeclareimage[height=0.75cm]{iitmlogo}{iitmlogo}
+%\logo{\pgfuseimage{iitmlogo}}
+
+
+%% Delete this, if you do not want the table of contents to pop up at
+%% the beginning of each subsection:
+\AtBeginSubsection[]
+{
+  \begin{frame}<beamer>
+    \frametitle{Outline}
+    \tableofcontents[currentsection,currentsubsection]
+  \end{frame}
+}
+
+
+% If you wish to uncover everything in a step-wise fashion, uncomment
+% the following command: 
+%\beamerdefaultoverlayspecification{<+->}
+
+%\includeonlyframes{current,current1,current2,current3,current4,current5,current6}
+
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+% DOCUMENT STARTS
+\begin{document}
+
+\begin{frame}
+  \titlepage
+\end{frame}
+
+\section{Python}
+
+\begin{frame}
+  {Problem set 3}
+  As you can guess, idea is to use \kwrd{for}!
+\end{frame}
+
+\begin{frame}{Problem 3.1}
+  Which of the earlier problems is simpler when we use \kwrd{for} instead of \kwrd{while}? 
+\end{frame}
+
+\begin{frame}{Problem 3.2}
+  Given an empty chessboard and one Bishop placed in any square, say (r, c), generate the list of all squares the Bishop could move to.
+\end{frame}
+
+\begin{frame}[fragile]
+  \frametitle{Problem 3.3}
+
+  Given two real numbers \typ{a, b}, and an integer \typ{N}, write a
+  function named \typ{linspace( a, b, N)} that returns an ordered list
+  of \typ{N} points starting with \typ{a} and ending in \typ{b} and
+  equally spaced.\\
+
+  For example, \typ{linspace(0, 5, 11)}, should return, \\
+\begin{lstlisting}
+[ 0.0 ,  0.5,  1.0 ,  1.5,  2.0 ,  2.5,  
+  3.0 ,  3.5,  4.0 ,  4.5,  5.0 ]
+\end{lstlisting}
+\end{frame}
+
+\begin{frame}[fragile]
+  \frametitle{Problem 3.4a (optional)}
+
+Use the \typ{linspace} function and generate a list of N tuples of the form\\
+\typ{[($x_1$,f($x_1$)),($x_2$,f($x_2$)),\ldots,($x_N$,f($x_N$))]}\\for the following functions,\begin{itemize}
+  \item \typ{f(x) = sin(x)}
+  \item \typ{f(x) = sin(x) + sin(10*x)}.
+\end{itemize}
+\end{frame}
+
+\begin{frame}[fragile]
+  \frametitle{Problem 3.4b (optional)}
+
+  Using the tuples generated earlier, determine the intervals where the roots of the functions lie.
+
+  \inctime{15}
+\end{frame}
+
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+% TIME: 15 m, running 185m 
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+
+\subsection{IO}
+
+\begin{frame}[fragile]
+  \frametitle{Simple tokenizing and parsing}
+  \begin{lstlisting}
+s = """The quick brown fox jumped
+       over the lazy dog"""
+for word in s.split():
+    print word.capitalize()
+  \end{lstlisting}
+\end{frame}
+
+\begin{frame}[fragile]
+  \frametitle{Problem 4.1}
+  Given a string like, ``1, 3-7, 12, 15, 18-21'', produce the list \\
+  \begin{lstlisting}
+    [1,3,4,5,6,7,12,15,18,19,20,21]
+  \end{lstlisting}
+\end{frame}
+
+\begin{frame}[fragile]
+  \frametitle{File handling}
+\begin{lstlisting}
+>>> f = open('/path/to/file_name')
+>>> data = f.read() # Read entire file.
+>>> line = f.readline() # Read one line.
+>>> f.close() # close the file.
+\end{lstlisting}
+Writing files
+\begin{lstlisting}
+>>> f = open('/path/to/file_name', 'w')
+>>> f.write('hello world\n')
+>>> f.close()
+\end{lstlisting}
+\begin{itemize}
+    \item Everything read or written is a string
+\end{itemize}
+\emphbar{Try \typ{file?} for more help}
+\end{frame}
+
+\begin{frame}[fragile]
+    \frametitle{File and \kwrd{for}}
+\begin{lstlisting}
+>>> f = open('/path/to/file_name')
+>>> for line in f:
+...     print line
+...
+\end{lstlisting}
+\end{frame}
+
+\begin{frame}{Problem 4.2}
+    The given file has lakhs of records in the form:\\
+    \typ{RGN;ID;NAME;MARK1;\ldots;MARK5;TOTAL;PFW}\\
+    Some entries may be empty.  Read the data from this file and print the
+    name of the student with the maximum total marks.
+\end{frame}
+
+\begin{frame}{Problem 4.3}
+    For the same data file compute the average marks in different
+    subjects, the student with the maximum mark in each subject and also
+    the standard deviation of the marks.  Do this efficiently.
+
+    \inctime{20}
+\end{frame}
+
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+% TIME: 20 m, running 205m 
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+
+\subsection{Modules}
+
+\begin{frame}[fragile]
+    {Modules}
+\begin{lstlisting}
+>>> sqrt(2)
+Traceback (most recent call last):
+  File "<stdin>", line 1, in <module>
+NameError: name 'sqrt' is not defined
+>>> import math        
+>>> math.sqrt(2)
+1.4142135623730951
+\end{lstlisting}
+\end{frame}
+
+\begin{frame}[fragile]
+    {Modules}
+  \begin{itemize}
+    \item The \kwrd{import} keyword ``loads'' a module
+    \item One can also use:
+      \begin{lstlisting}
+>>> from math import sqrt
+>>> from math import *
+      \end{lstlisting}    
+    \item What is the difference?
+    \item \alert{Use the later only in interactive mode}
+    \end{itemize}
+  \emphbar{Package hierarchies}
+      \begin{lstlisting}
+>>> from os.path import exists
+      \end{lstlisting}
+\end{frame}
+
+\begin{frame}
+  \frametitle{Modules: Standard library}
+  \begin{itemize}
+  \item Very powerful, ``Batteries included''
+  \item Some standard modules:
+    \begin{itemize}
+    \item Math: \typ{math}, \typ{random}
+    \item Internet access: \typ{urllib2}, \typ{smtplib}
+    \item System, Command line arguments: \typ{sys}
+    \item Operating system interface: \typ{os}
+    \item Regular expressions: \typ{re}
+    \item Compression: \typ{gzip}, \typ{zipfile}, and \typ{tarfile}
+    \item And a whole lot more!
+    \end{itemize}
+  \item Check out the Python Library reference:
+    \url{http://docs.python.org/library/}
+  \end{itemize}
+\end{frame}
+
+\begin{frame}[fragile]
+    {Modules of special interest}
+    \begin{description}[matplotlibfor2d]
+
+        \item[\typ{numpy}] Efficient, powerful numeric arrays
+
+        \item[\typ{matplotlib}] Easy, interactive, 2D plotting
+
+        \item[\typ{scipy}] statistics, optimization, integration, linear
+            algebra, Fourier transforms, signal and image processing,
+            genetic algorithms, ODE solvers, special functions, and more
+
+        \item[Mayavi] Easy, interactive, 3D plotting
+
+    \end{description}
+\end{frame}
+
+\begin{frame}[fragile]
+    {Creating your own modules}
+  \begin{itemize}
+  \item Define variables, functions and classes in a file with a
+    \typ{.py} extension
+  \item This file becomes a module!
+  \item Accessible when in the current directory
+  \item Use \typ{cd} in IPython to change directory
+
+  \item Naming your module
+      \end{itemize}
+\end{frame}
+
+\begin{frame}[fragile]
+  \frametitle{Modules: example}
+  \begin{lstlisting}
+# --- arith.py ---
+def gcd(a, b):
+    if a%b == 0: return b
+    return gcd(b, a%b)
+def lcm(a, b):
+    return a*b/gcd(a, b)
+# ------------------
+>>> import arith
+>>> arith.gcd(26, 65)
+13
+>>> arith.lcm(26, 65)
+130
+  \end{lstlisting}
+\end{frame}
+
+\begin{frame}[fragile]
+  \frametitle{Problem 5.1}
+
+  Put all the functions you have written so far as part of the problems
+  into one module called \typ{iitb.py} and use this module from IPython.
+
+\inctime{20}
+\end{frame}
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+% TIME: 20 m, running 225m 
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+
+\subsection{Objects}
+\begin{frame}{Objects in Python}
+    \begin{itemize}
+        \item What is an Object? (Types and classes)
+        \item identity
+        \item type
+        \item method
+      \end{itemize}
+\end{frame}
+
+\begin{frame}[fragile]
+  \frametitle{Why are they useful?}
+  \small
+  \begin{lstlisting}
+for element in (1, 2, 3):
+    print element
+for key in {'one':1, 'two':2}:
+    print key
+for char in "123":
+    print char
+for line in open("myfile.txt"):
+    print line
+for line in urllib2.urlopen('http://site.com'):
+    print line
+  \end{lstlisting}
+\end{frame}
+
+\begin{frame}{And the winner is \ldots OBJECTS!}
+  All objects providing a similar inteface can be used the same way.\\
+  Functions (and others) are first-class objects. Can be passed to and returned from functions.
+  \inctime{10}
+\end{frame}
+
+\subsection{Coding Style in Python}
+\begin{frame}{Readability and Consistency}
+    \begin{itemize}
+        \item Readability Counts!-Code is read more often than its written.
+        \item Consistency!
+        \item Know when to be inconsistent.
+      \end{itemize}
+\end{frame}
+
+\begin{frame}[fragile]
+  \frametitle{Code Layout}
+  \begin{itemize}
+        \item Indentation
+        \item Tabs or Spaces??
+        \item Maximum Line Length
+        \item Blank Lines
+        \item Encodings
+   \end{itemize}
+\end{frame}
+
+\begin{frame}{Whitespaces in Expressions}
+  \begin{itemize}
+        \item When to use extraneous whitespaces??
+        \item When to avoid extra whitespaces??
+        \item Use one statement per line
+   \end{itemize}
+\end{frame}
+
+\begin{frame}{Comments}
+  \begin{itemize}
+        \item No comments better than contradicting comments
+        \item Block comments
+        \item Inline comments
+   \end{itemize}
+\end{frame}
+
+\begin{frame}{Docstrings}
+  \begin{itemize}
+        \item When to write docstrings?
+        \item Ending the docstrings
+        \item One liner docstrings
+   \end{itemize}
+\end{frame}
+\inctime{10}
+\end{document}
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
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+        \item Indentation
+        \item Tabs or Spaces??
+        \item Maximum Line Length
+        \item Blank Lines
+        \item Encodings
+   \end{itemize}
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--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/day1/Session-4.nav	Wed Oct 07 00:50:06 2009 +0530
@@ -0,0 +1,62 @@
+\beamer@endinputifotherversion {3.07pt}
+\headcommand {\slideentry {0}{0}{1}{1/1}{}{0}}
+\headcommand {\beamer@framepages {1}{1}}
+\headcommand {\sectionentry {1}{Python}{2}{Python}{0}}
+\headcommand {\beamer@sectionpages {1}{1}}
+\headcommand {\beamer@subsectionpages {1}{1}}
+\headcommand {\beamer@subsectionentry {0}{1}{1}{2}{Dictionary}}\headcommand {\beamer@subsectionpages {2}{1}}
+\headcommand {\slideentry {1}{1}{1}{2/2}{Dictionary}{0}}
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+\headcommand {\beamer@subsectionentry {0}{1}{3}{10}{Functions Reloaded!}}\headcommand {\beamer@subsectionpages {6}{9}}
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+\headcommand {\beamer@framepages {16}{16}}
+\headcommand {\slideentry {1}{4}{2}{17/17}{Functional programming}{0}}
+\headcommand {\beamer@framepages {17}{17}}
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+\headcommand {\beamer@subsectionpages {18}{24}}
+\headcommand {\beamer@sectionpages {2}{24}}
+\headcommand {\beamer@documentpages {24}}
+\headcommand {\def \inserttotalframenumber {24}}
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/day1/Session-4.out	Wed Oct 07 00:50:06 2009 +0530
@@ -0,0 +1,6 @@
+\BOOKMARK [2][]{Outline0.1}{Python}{}
+\BOOKMARK [3][]{Outline0.1.1.2}{Dictionary}{Outline0.1}
+\BOOKMARK [3][]{Outline0.1.2.6}{Set}{Outline0.1}
+\BOOKMARK [3][]{Outline0.1.3.10}{Functions Reloaded!}{Outline0.1}
+\BOOKMARK [3][]{Outline0.1.4.16}{Functional programming}{Outline0.1}
+\BOOKMARK [3][]{Outline0.1.5.18}{Debugging}{Outline0.1}
Binary file day1/Session-4.pdf has changed
--- a/day1/Session-4.tex	Wed Oct 07 00:49:14 2009 +0530
+++ b/day1/Session-4.tex	Wed Oct 07 00:50:06 2009 +0530
@@ -2,7 +2,7 @@
 % Tutorial slides on Python.
 %
 % Author: Prabhu Ramachandran <prabhu at aero.iitb.ac.in>
-% Copyright (c) 2005-2008, Prabhu Ramachandran
+% Copyright (c) 2005-2009, Prabhu Ramachandran
 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 
 \documentclass[14pt,compress]{beamer}
@@ -73,9 +73,9 @@
 
 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 % Title page
-\title[Basic Python]{Python:\\A great programming toolkit}
+\title[Basic Python]{Python:\\Advanced Python data structures, Functions and Debugging}
 
-\author[Asokan \& Prabhu] {Asokan Pichai\\Prabhu Ramachandran}
+\author[FOSSEE Team] {Asokan Pichai\\Prabhu Ramachandran}
 
 \institute[IIT Bombay] {Department of Aerospace Engineering\\IIT Bombay}
 \date[] {10, October 2009}
@@ -134,6 +134,7 @@
     \item \typ{d.keys()} returns a list
     \item can we have duplicate keys?
   \end{itemize}
+  \inctime{5}
 \end{frame}
 
 \begin{frame} {Problem Set 2.1}
@@ -143,7 +144,7 @@
     \item[2.1.3] Find the most used Python keywords in your Python code (import keyword).
 \end{description}
 
-\inctime{20}
+\inctime{10}
 \end{frame}
 
 \subsection{Set}
@@ -183,6 +184,7 @@
 >>> len(f10)
 5
 \end{lstlisting}
+\inctime{5}
 \end{frame}
 
 
@@ -192,7 +194,7 @@
     \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?
     \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.
 \end{description}
-\inctime{15}
+\inctime{10}
 \end{frame}
 
 \subsection{Functions Reloaded!}
@@ -284,7 +286,7 @@
 \typ{map, reduce, filter}\\
 list comprehension\\
 generators
-    \inctime{10} 
+    \inctime{15} 
 \end{frame}
 
 \subsection{Debugging}
@@ -323,7 +325,7 @@
         \item Process: Hypothesis, test, refine, rinse-repeat
         \item Using \typ{\%debug} and \typ{\%pdb} in IPython
     \end{itemize}
-    \inctime{10} 
+    \inctime{15} 
 \end{frame}
 
 \begin{frame}[fragile]
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/day1/Session-4.tex~	Wed Oct 07 00:50:06 2009 +0530
@@ -0,0 +1,378 @@
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+% Tutorial slides on Python.
+%
+% Author: Prabhu Ramachandran <prabhu at aero.iitb.ac.in>
+% Copyright (c) 2005-2008, Prabhu Ramachandran
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+
+\documentclass[14pt,compress]{beamer}
+%\documentclass[draft]{beamer}
+%\documentclass[compress,handout]{beamer}
+%\usepackage{pgfpages} 
+%\pgfpagesuselayout{2 on 1}[a4paper,border shrink=5mm]
+
+% Modified from: generic-ornate-15min-45min.de.tex
+\mode<presentation>
+{
+  \usetheme{Warsaw}
+  \useoutertheme{split}
+  \setbeamercovered{transparent}
+}
+
+\usepackage[english]{babel}
+\usepackage[latin1]{inputenc}
+%\usepackage{times}
+\usepackage[T1]{fontenc}
+
+% Taken from Fernando's slides.
+\usepackage{ae,aecompl}
+\usepackage{mathpazo,courier,euler}
+\usepackage[scaled=.95]{helvet}
+
+\definecolor{darkgreen}{rgb}{0,0.5,0}
+
+\usepackage{listings}
+\lstset{language=Python,
+    basicstyle=\ttfamily\bfseries,
+    commentstyle=\color{red}\itshape,
+  stringstyle=\color{darkgreen},
+  showstringspaces=false,
+  keywordstyle=\color{blue}\bfseries}
+
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+% Macros
+\setbeamercolor{emphbar}{bg=blue!20, fg=black}
+\newcommand{\emphbar}[1]
+{\begin{beamercolorbox}[rounded=true]{emphbar} 
+      {#1}
+ \end{beamercolorbox}
+}
+\newcounter{time}
+\setcounter{time}{0}
+\newcommand{\inctime}[1]{\addtocounter{time}{#1}{\tiny \thetime\ m}}
+
+\newcommand{\typ}[1]{\texttt{#1}}
+
+\newcommand{\kwrd}[1]{ \texttt{\textbf{\color{blue}{#1}}}  }
+
+%%% This is from Fernando's setup.
+% \usepackage{color}
+% \definecolor{orange}{cmyk}{0,0.4,0.8,0.2}
+% % Use and configure listings package for nicely formatted code
+% \usepackage{listings}
+% \lstset{
+%    language=Python,
+%    basicstyle=\small\ttfamily,
+%    commentstyle=\ttfamily\color{blue},
+%    stringstyle=\ttfamily\color{orange},
+%    showstringspaces=false,
+%    breaklines=true,
+%    postbreak = \space\dots
+% }
+
+
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+% Title page
+\title[Basic Python]{Python:\\Advanced Python data structures, Functions and Debugging}
+
+\author[FOSSEE Team] {Asokan Pichai\\Prabhu Ramachandran}
+
+\institute[IIT Bombay] {Department of Aerospace Engineering\\IIT Bombay}
+\date[] {10, October 2009}
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+
+%\pgfdeclareimage[height=0.75cm]{iitmlogo}{iitmlogo}
+%\logo{\pgfuseimage{iitmlogo}}
+
+
+%% Delete this, if you do not want the table of contents to pop up at
+%% the beginning of each subsection:
+\AtBeginSubsection[]
+{
+  \begin{frame}<beamer>
+    \frametitle{Outline}
+    \tableofcontents[currentsection,currentsubsection]
+  \end{frame}
+}
+
+
+% If you wish to uncover everything in a step-wise fashion, uncomment
+% the following command: 
+%\beamerdefaultoverlayspecification{<+->}
+
+%\includeonlyframes{current,current1,current2,current3,current4,current5,current6}
+
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+% DOCUMENT STARTS
+\begin{document}
+
+\begin{frame}
+  \titlepage
+\end{frame}
+
+\section{Python}
+
+\subsection{Dictionary}
+\begin{frame}{Dictionary}
+  \begin{itemize}
+    \item aka associative arrays, key-value pairs, hashmaps, hashtables \ldots    
+    \item \typ{ d = \{ ``Hitchhiker's guide'' : 42, ``Terminator'' : ``I'll be back''\}}
+    \item lists and tuples index: 0 \ldots n
+    \item dictionaries index using strings
+    \item aka key-value pairs
+    \item what can be keys?
+  \end{itemize}
+\end{frame}
+
+\begin{frame}{Dictionary \ldots }
+  \begin{itemize}
+    \item \alert{Unordered}
+      \begin{block}{Standard usage}
+        for key in dict:\\
+            <use> dict[key] \# => value
+      \end{block}
+    \item \typ{d.keys()} returns a list
+    \item can we have duplicate keys?
+  \end{itemize}
+  \inctime{5}
+\end{frame}
+
+\begin{frame} {Problem Set 2.1}
+  \begin{description}
+\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.
+    \item[2.1.2] Count word frequencies in a file.
+    \item[2.1.3] Find the most used Python keywords in your Python code (import keyword).
+\end{description}
+
+\inctime{10}
+\end{frame}
+
+\subsection{Set}
+\begin{frame}[fragile]
+  \frametitle{Set}
+    \begin{itemize}
+      \item Simplest container, mutable
+      \item No ordering, no duplicates
+      \item usual suspects: union, intersection, subset \ldots
+      \item >, >=, <, <=, in, \ldots
+    \end{itemize}
+    \begin{lstlisting}
+>>> f10 = set([1,2,3,5,8])
+>>> p10 = set([2,3,5,7])
+>>> f10|p10
+set([1, 2, 3, 5, 7, 8])
+>>> f10&p10
+set([2, 3, 5])
+>>> f10-p10
+set([8, 1])
+\end{lstlisting}
+\end{frame}
+
+\begin{frame}[fragile]
+  \frametitle{Set}
+    \begin{lstlisting}
+>>> p10-f10, f10^p10
+set([7]), set([1, 7, 8])
+>>> set([2,3]) < p10
+True
+>>> set([2,3]) <= p10
+True
+>>> 2 in p10
+True
+>>> 4 in p10
+False
+>>> len(f10)
+5
+\end{lstlisting}
+\inctime{5}
+\end{frame}
+
+
+\begin{frame}
+  \frametitle{Problem set 2.2}
+  \begin{description}
+    \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?
+    \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.
+\end{description}
+\inctime{10}
+\end{frame}
+
+\subsection{Functions Reloaded!}
+\begin{frame}[fragile]
+    \frametitle{Advanced functions}
+    \begin{itemize}
+        \item default args
+        \item var args
+        \item keyword args
+        \item scope
+        \item \typ{global}
+      \end{itemize}
+\end{frame}
+
+\begin{frame}[fragile]
+  \frametitle{Functions: default arguments}
+  \small
+  \begin{lstlisting}
+def ask_ok(prompt, retries=4,
+           complaint='Yes or no!'):
+    while True:
+        ok = raw_input(prompt)
+        if ok in ('y', 'ye', 'yes'): 
+            return True
+        if ok in ('n', 'no', 'nop',
+                  'nope'): 
+            return False
+        retries = retries - 1
+        if retries < 0: 
+            raise IOError, 'bad user'
+        print complaint
+  \end{lstlisting}
+\end{frame}
+
+\begin{frame}[fragile]
+  \frametitle{Functions: keyword arguments}
+  \small
+  \begin{lstlisting}
+def parrot(voltage, state='a stiff', 
+           action='voom', type='Royal Blue'):
+    print "-- This parrot wouldn't", action,
+    print "if you supply", voltage, "Volts."
+    print "-- Lovely plumage, the", type
+    print "-- It's", state, "!"
+
+parrot(1000)
+parrot(action = 'VOOOOOM', voltage = 1000000)
+parrot('a thousand',
+       state = 'pushing up the daisies')
+parrot('a million', 'bereft of life', 'jump')
+\end{lstlisting}
+\end{frame}
+
+\begin{frame}[fragile]
+  \frametitle{Functions: arbitrary argument lists}
+  \begin{itemize}
+  \item Arbitrary number of arguments using \verb+*args+ or
+    \verb+*whatever+
+  \item Keyword arguments using \verb+**kw+
+  \item Given a tuple/dict how do you call a function?
+    \begin{itemize}
+    \item Using argument unpacking
+    \item For positional arguments: \verb+foo(*[5, 10])+
+    \item For keyword args: \verb+foo(**{'a':5, 'b':10})+
+    \end{itemize}
+  \end{itemize}
+\end{frame}
+
+  \begin{frame}[fragile]
+\begin{lstlisting}
+def foo(a=10, b=100):
+    print a, b
+def func(*args, **keyword):
+    print args, keyword
+# Unpacking:
+args = [5, 10]
+foo(*args)
+kw = {'a':5, 'b':10}
+foo(**kw)
+\end{lstlisting}
+    \inctime{15} 
+\end{frame}
+
+\subsection{Functional programming}
+\begin{frame}[fragile]
+    \frametitle{Functional programming}
+What is the basic idea?\\
+Why is it interesting?\\
+\typ{map, reduce, filter}\\
+list comprehension\\
+generators
+    \inctime{15} 
+\end{frame}
+
+\subsection{Debugging}
+\begin{frame}[fragile]
+ \frametitle{Errors}
+ \begin{lstlisting}
+>>> while True print 'Hello world'
+  File "<stdin>", line 1, in ?
+    while True print 'Hello world'
+                   ^
+SyntaxError: invalid syntax
+\end{lstlisting}
+\end{frame}
+
+\begin{frame}[fragile]
+ \frametitle{Exceptions}
+ \begin{lstlisting}
+>>> print spam
+Traceback (most recent call last):
+  File "<stdin>", line 1, in <module>
+NameError: name 'spam' is not defined
+
+>>> 1 / 0
+Traceback (most recent call last):
+  File "<stdin>", line 1, in <module>
+ZeroDivisionError: integer division 
+or modulo by zero
+\end{lstlisting}
+\end{frame}
+
+\begin{frame}[fragile]
+    \frametitle{Debugging effectively}
+
+    \begin{itemize}
+        \item  \kwrd{print} based strategy
+        \item Process: Hypothesis, test, refine, rinse-repeat
+        \item Using \typ{\%debug} and \typ{\%pdb} in IPython
+    \end{itemize}
+    \inctime{15} 
+\end{frame}
+
+\begin{frame}[fragile]
+\frametitle{Debugging: example}
+\small
+\begin{lstlisting}
+>>> import pdb
+>>> import mymodule
+>>> pdb.run('mymodule.test()')
+> <string>(1)<module>()
+(Pdb) continue
+Traceback (most recent call last):
+  File "<stdin>", line 1, in <module>
+  File "/usr/lib/python2.6/pdb.py", line 1207, in run
+    Pdb().run(statement, globals, locals)
+  File "/usr/lib/python2.6/bdb.py", line 368, in run
+    exec cmd in globals, locals
+  File "<string>", line 1, in <module>
+  File "mymodule.py", line 2, in test
+    print spam
+NameError: global name 'spam' is not defined
+\end{lstlisting}
+\end{frame}
+
+\begin{frame}[fragile]
+\frametitle{Debugging in IPython}
+\small
+\begin{lstlisting}
+In [1]: %pdb
+Automatic pdb calling has been turned ON
+In [2]: import mymodule
+In [3]: mymodule.test()
+----------------------------------------------
+NameError    Traceback (most recent call last)
+/media/python/iitb/workshops/day1/<ipython console> in <module>()
+/media/python/iitb/workshops/day1/mymodule.pyc in test()
+      1 def test():
+----> 2     print spam
+NameError: global name 'spam' is not defined
+> /media/python/iitb/workshops/day1/mymodule.py(2)test()
+      0     print spam
+ipdb>
+\end{lstlisting}
+\end{frame}
+
+\begin{frame}[fragile]
+\frametitle{Debugging: Exercise}
+\end{frame}
+
+\end{document}
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/day1/Session-4.toc	Wed Oct 07 00:50:06 2009 +0530
@@ -0,0 +1,8 @@
+\beamer@endinputifotherversion {3.07pt}
+\select@language {english}
+\beamer@sectionintoc {1}{Python}{2}{0}{1}
+\beamer@subsectionintoc {1}{1}{Dictionary}{2}{0}{1}
+\beamer@subsectionintoc {1}{2}{Set}{6}{0}{1}
+\beamer@subsectionintoc {1}{3}{Functions Reloaded!}{10}{0}{1}
+\beamer@subsectionintoc {1}{4}{Functional programming}{16}{0}{1}
+\beamer@subsectionintoc {1}{5}{Debugging}{18}{0}{1}
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/day1/Session-4.vrb	Wed Oct 07 00:50:06 2009 +0530
@@ -0,0 +1,1 @@
+\frametitle {Debugging: Exercise}
--- a/day2/session1.tex	Wed Oct 07 00:49:14 2009 +0530
+++ b/day2/session1.tex	Wed Oct 07 00:50:06 2009 +0530
@@ -2,7 +2,7 @@
 % Tutorial slides on Python.
 %
 % Author: Prabhu Ramachandran <prabhu at aero.iitb.ac.in>
-% Copyright (c) 2005-2008, Prabhu Ramachandran
+% Copyright (c) 2005-2009, Prabhu Ramachandran
 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 
 \documentclass[14pt,compress]{beamer}
@@ -76,7 +76,7 @@
 
 \author[FOSSEE Team] {Asokan Pichai\\Prabhu Ramachandran}
 
-\institute[FOSSEE] {FOSSEE Team}
+\institute[IIT Bombay] {Department of Aerospace Engineering\\IIT Bombay}
 \date[] {11, October 2009}
 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 
@@ -221,7 +221,6 @@
   \end{itemize}
 \end{frame}
 
-\end{frame}
 \begin{frame}[fragile]
   \frametitle{Array math cont.}
   \begin{itemize}
--- a/day2/session2.tex	Wed Oct 07 00:49:14 2009 +0530
+++ b/day2/session2.tex	Wed Oct 07 00:50:06 2009 +0530
@@ -2,7 +2,7 @@
 % Tutorial slides on Python.
 %
 % Author: Prabhu Ramachandran <prabhu at aero.iitb.ac.in>
-% Copyright (c) 2005-2008, Prabhu Ramachandran
+% Copyright (c) 2005-2009, Prabhu Ramachandran
 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 
 \documentclass[14pt,compress]{beamer}
@@ -77,7 +77,7 @@
 
 \author[FOSSEE Team] {Asokan Pichai\\Prabhu Ramachandran}
 
-\institute[FOSSEE] {FOSSEE Team}
+\institute[IIT Bombay] {Department of Aerospace Engineering\\IIT Bombay}
 \date[] {11, October 2009}
 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 
--- a/day2/session3.tex	Wed Oct 07 00:49:14 2009 +0530
+++ b/day2/session3.tex	Wed Oct 07 00:50:06 2009 +0530
@@ -1,8 +1,9 @@
-%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
-%% Talk given somewhere on dd/mm/yyyy
-%% 
-%% Author: Prabhu Ramachandran <prabhu@aero.iitb.ac.in>
-%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+% Tutorial slides on Python.
+%
+% Author: Prabhu Ramachandran <prabhu at aero.iitb.ac.in>
+% Copyright (c) 2005-2009, Prabhu Ramachandran
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 
 \documentclass[compress,14pt]{beamer}
 % \documentclass[handout]{beamer}
@@ -98,7 +99,7 @@
 
 \author[FOSSEE Team] {Asokan Pichai\\Prabhu Ramachandran}
 
-\institute[FOSSEE] {FOSSEE Team}
+\institute[IIT Bombay] {Department of Aerospace Engineering\\IIT Bombay}
 \date[] {11, October 2009}
 \date[] % (optional)
 }