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+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+% 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}