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1 % Created 2010-10-28 Thu 11:37 |
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2 \documentclass[presentation]{beamer} |
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3 \usepackage[latin1]{inputenc} |
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4 \usepackage[T1]{fontenc} |
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5 \usepackage{fixltx2e} |
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6 \usepackage{graphicx} |
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7 \usepackage{longtable} |
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8 \usepackage{float} |
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9 \usepackage{wrapfig} |
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10 \usepackage{soul} |
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11 \usepackage{t1enc} |
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12 \usepackage{textcomp} |
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13 \usepackage{marvosym} |
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14 \usepackage{wasysym} |
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15 \usepackage{latexsym} |
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16 \usepackage{amssymb} |
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17 \usepackage{hyperref} |
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18 \tolerance=1000 |
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19 \usepackage[english]{babel} \usepackage{ae,aecompl} |
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20 \usepackage{mathpazo,courier,euler} \usepackage[scaled=.95]{helvet} |
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21 \usepackage{listings} |
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22 \lstset{language=Python, basicstyle=\ttfamily\bfseries, |
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23 commentstyle=\color{red}\itshape, stringstyle=\color{darkgreen}, |
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24 showstringspaces=false, keywordstyle=\color{blue}\bfseries} |
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25 \providecommand{\alert}[1]{\textbf{#1}} |
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26 |
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27 \title{Advanced features of functions} |
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28 \author{FOSSEE} |
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29 \date{} |
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30 |
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31 \usetheme{Warsaw}\usecolortheme{default}\useoutertheme{infolines}\setbeamercovered{transparent} |
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32 \begin{document} |
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33 |
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34 \maketitle |
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35 |
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36 |
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37 |
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38 |
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39 |
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40 |
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41 |
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42 |
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43 |
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44 \begin{frame} |
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45 \frametitle{Outline} |
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46 \label{sec-1} |
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47 |
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48 \begin{itemize} |
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49 \item Assigning default values to arguments |
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50 \item Calling functions using Keyword arguments |
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51 \item functions in standard library |
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52 \end{itemize} |
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53 \end{frame} |
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54 \begin{frame} |
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55 \frametitle{Question 1} |
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56 \label{sec-2} |
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57 |
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58 Redefine the function \texttt{welcome}, by interchanging it's |
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59 arguments. Place the \texttt{name} argument with it's default value of |
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60 ``World'' before the \texttt{greet} argument. |
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61 \end{frame} |
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62 \begin{frame}[fragile] |
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63 \frametitle{Solution 1} |
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64 \label{sec-3} |
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65 |
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66 \begin{verbatim} |
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67 def welcome(name="World", greet): |
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68 print greet, name |
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69 \end{verbatim} |
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70 We get an error that reads \texttt{SyntaxError: non-default argument follows default argument}. When defining a function all the |
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71 argument with default values should come at the end. |
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72 \end{frame} |
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73 \begin{frame} |
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74 \frametitle{Question 2} |
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75 \label{sec-4} |
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76 |
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77 See the definition of linspace using \texttt{?} and observe how all the |
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78 arguments with default values are towards the end. |
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79 \end{frame} |
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80 \begin{frame}[fragile] |
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81 \frametitle{Solution 2} |
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82 \label{sec-5} |
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83 |
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84 \begin{verbatim} |
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85 linspace? |
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86 \end{verbatim} |
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87 \end{frame} |
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88 \begin{frame} |
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89 \frametitle{Question 3} |
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90 \label{sec-6} |
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91 |
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92 Redefine the function \texttt{welcome} with a default value of |
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93 ``Hello'' to the \texttt{greet} argument. Then, call the function without any |
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94 arguments. |
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95 \end{frame} |
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96 \begin{frame}[fragile] |
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97 \frametitle{Solution 3} |
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98 \label{sec-7} |
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99 |
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100 \begin{verbatim} |
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101 def welcome(greet="Hello", name="World"): |
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102 print greet, name |
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103 |
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104 welcome() |
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105 \end{verbatim} |
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106 \end{frame} |
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107 \begin{frame} |
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108 \frametitle{Summary} |
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109 \label{sec-8} |
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110 |
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111 You should now be able to -- |
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112 \begin{itemize} |
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113 \item define functions with default arguments |
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114 \item call functions using keyword arguments |
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115 \end{itemize} |
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116 \end{frame} |
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117 \begin{frame} |
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118 \frametitle{Thank you!} |
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119 \label{sec-9} |
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120 |
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121 \begin{block}{} |
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122 \begin{center} |
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123 This spoken tutorial has been produced by the |
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124 \textcolor{blue}{FOSSEE} team, which is funded by the |
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125 \end{center} |
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126 \begin{center} |
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127 \textcolor{blue}{National Mission on Education through \\ |
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128 Information \& Communication Technology \\ |
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129 MHRD, Govt. of India}. |
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130 \end{center} |
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131 \end{block} |
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132 \end{frame} |
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133 |
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134 \end{document} |