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     1 % Created 2010-10-11 Mon 00:34

     2 %Tutorial slides on Python.

     2 \documentclass[presentation]{beamer}

     3 %

     3 \usepackage[latin1]{inputenc}

     4 % Author: FOSSEE 

     4 \usepackage[T1]{fontenc}

     5 % Copyright (c) 2009, FOSSEE, IIT Bombay

     5 \usepackage{fixltx2e}

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     6 \usepackage{graphicx}

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    18 \usepackage[english]{babel} \usepackage{ae,aecompl}

    19 \usepackage{mathpazo,courier,euler} \usepackage[scaled=.95]{helvet}

    20 \usepackage{listings}

    21 \lstset{language=Python, basicstyle=\ttfamily\bfseries,

    22 commentstyle=\color{red}\itshape, stringstyle=\color{darkgreen},

    23 showstringspaces=false, keywordstyle=\color{blue}\bfseries}

    24 \providecommand{\alert}[1]{\textbf{#1}}

     8 \documentclass[14pt,compress]{beamer}

    26 \title{Advanced features of functions}

     9 %\documentclass[draft]{beamer}

    27 \author{FOSSEE}

    10 %\documentclass[compress,handout]{beamer}

    11 %\usepackage{pgfpages} 

    12 %\pgfpagesuselayout{2 on 1}[a4paper,border shrink=5mm]

    13 

    14 % Modified from: generic-ornate-15min-45min.de.tex

    15 \mode<presentation>

    16 {

    17   \usetheme{Warsaw}

    18   \useoutertheme{infolines}

    19   \setbeamercovered{transparent}

    20 }

    21 

    22 \usepackage[english]{babel}

    23 \usepackage[latin1]{inputenc}

    24 %\usepackage{times}

    25 \usepackage[T1]{fontenc}

    26 

    27 \usepackage{ae,aecompl}

    28 \usepackage{mathpazo,courier,euler}

    29 \usepackage[scaled=.95]{helvet}

    30 

    31 \definecolor{darkgreen}{rgb}{0,0.5,0}

    32 

    33 \usepackage{listings}

    34 \lstset{language=Python,

    35     basicstyle=\ttfamily\bfseries,

    36     commentstyle=\color{red}\itshape,

    37   stringstyle=\color{darkgreen},

    38   showstringspaces=false,

    39   keywordstyle=\color{blue}\bfseries}

    40 

    41 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

    42 % Macros

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    52 

    53 \newcommand{\typ}[1]{\lstinline{#1}}

    54 

    55 \newcommand{\kwrd}[1]{ \texttt{\textbf{\color{blue}{#1}}}  }

    56 

    57 % Title page

    58 \title{Your Title Here}

    59 

    60 \author[FOSSEE] {FOSSEE}

    61 

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

    65 % DOCUMENT STARTS

    30 \usetheme{Warsaw}\usecolortheme{default}\useoutertheme{infolines}\setbeamercovered{transparent}

    68 \begin{frame}

    33 \maketitle

    69   \maketitle

    70 \end{frame}

    84 \begin{frame}[fragile]

    37 

    85   \frametitle{Summary}

    38 

    86   \begin{itemize}

    39 

    87     \item 

    40 

    88   \end{itemize}

    41 

    89 \end{frame}

    92   \frametitle{Thank you!}  

    44 \frametitle{Outline}

    45 \label{sec-1}

    46 

    47 \begin{itemize}

    48 \item Assigning default values to arguments

    49 \item Calling functions using Keyword arguments

    50 \item functions in standard library

    51 \end{itemize}

    52 \end{frame}

    53 \begin{frame}

    54 \frametitle{Question 1}

    55 \label{sec-2}

    56 

    57   Redefine the function \texttt{welcome}, by interchanging it's

    58   arguments. Place the \texttt{name} argument with it's default value of

    59   ``World'' before the \texttt{greet} argument.

    60 \end{frame}

    61 \begin{frame}[fragile]

    62 \frametitle{Solution 1}

    63 \label{sec-3}

    64 

    65 \lstset{language=Python}

    66 \begin{lstlisting}

    67 def welcome(name="World", greet):

    68     print greet, name

    69 \end{lstlisting}

    70   We get an error that reads \texttt{SyntaxError: non-default argument   follows default argument}. When defining a function all the

    71   argument with default values should come at the end.

    72 \end{frame}

    73 \begin{frame}

    74 \frametitle{Question 2}

    75 \label{sec-4}

    76 

    77   See the definition of linspace using \texttt{?} and observe how all the

    78   arguments with default values are towards the end.

    79 \end{frame}

    80 \begin{frame}[fragile]

    81 \frametitle{Solution 2}

    82 \label{sec-5}

    83 

    84 \lstset{language=Python}

    85 \begin{lstlisting}

    86 linspace?

    87 \end{lstlisting}

    88 \end{frame}

    89 \begin{frame}

    90 \frametitle{Question 3}

    91 \label{sec-6}

    92 

    93   Redefine the function \texttt{welcome} with a default value of

    94   ``Hello'' to the \texttt{greet} argument. Then, call the function without any

    95   arguments. 

    96 \end{frame}

    97 \begin{frame}[fragile]

    98 \frametitle{Solution 3}

    99 \label{sec-7}

   100 

   101 \lstset{language=Python}

   102 \begin{lstlisting}

   103 def welcome(greet="Hello", name="World"):

   104     print greet, name

   105 

   106 welcome()

   107 \end{lstlisting}

   108 \end{frame}

   109 \begin{frame}

   110 \frametitle{Summary}

   111 \label{sec-8}

   112 

   113   You should now be able to --

   114 \begin{itemize}

   115 \item define functions with default arguments

   116 \item call functions using keyword arguments

   117 \end{itemize}

   118 \end{frame}

   119 \begin{frame}

   120 \frametitle{Thank you!}

   121 \label{sec-9}

   122