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−% Created 2010-10-11 Mon 11:27
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−\documentclass[presentation]{beamer}
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−\usepackage[latin1]{inputenc}
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−\usepackage[T1]{fontenc}
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−\usepackage{fixltx2e}
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−\usepackage{graphicx}
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−\usepackage{longtable}
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−\usepackage{float}
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−\usepackage{wrapfig}
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−\usepackage{soul}
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−\usepackage{textcomp}
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−\usepackage{marvosym}
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−\usepackage{wasysym}
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−\usepackage{latexsym}
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−\usepackage{amssymb}
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−\usepackage{hyperref}
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−\tolerance=1000
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−\usepackage[english]{babel} \usepackage{ae,aecompl}
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−\usepackage{mathpazo,courier,euler} \usepackage[scaled=.95]{helvet}
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−\usepackage{listings}
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−\lstset{language=Python, basicstyle=\ttfamily\bfseries,
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−commentstyle=\color{red}\itshape, stringstyle=\color{darkgreen},
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−showstringspaces=false, keywordstyle=\color{blue}\bfseries}
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−\providecommand{\alert}[1]{\textbf{#1}}
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−
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−\title{Manipulating strings}
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−\author{FOSSEE}
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−\date{}
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−
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−\usetheme{Warsaw}\usecolortheme{default}\useoutertheme{infolines}\setbeamercovered{transparent}
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−\begin{document}
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−
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−\maketitle
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−
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−
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−
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−
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−
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−
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−
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−
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−
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−\begin{frame}
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−\frametitle{Outline}
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−\label{sec-1}
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−
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−\begin{itemize}
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−\item Slicing strings to get sub-strings
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−\item Reversing strings
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−\item Replacing characters in strings.
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−\item Converting strings to upper or lower case
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−\item Joining a list of strings
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−\end{itemize}
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−\end{frame}
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−\begin{frame}
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−\frametitle{Question 1}
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−\label{sec-2}
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−
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−  Obtain the sub-string excluding the first and last characters from
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−  the string \texttt{s}.
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−\end{frame}
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−\begin{frame}[fragile]
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−\frametitle{Solution 1}
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−\label{sec-3}
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−
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−\lstset{language=Python}
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−\begin{lstlisting}
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−In []:  s[1:-1]
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−\end{lstlisting}
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−\end{frame}
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−\begin{frame}
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−\frametitle{Question 2}
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−\label{sec-4}
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−
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−  Given a list week, week = \texttt{week = ["sun", "mon", "tue", "wed",   "thu", "fri", "sat"]}. Check if \texttt{s} is a valid name of a day of the
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−  week. Change the solution to this problem, to include forms like,
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−  SAT, SATURDAY, Saturday and Sat.
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−\end{frame}
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−\begin{frame}[fragile]
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−\frametitle{Solution 2}
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−\label{sec-5}
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−
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−\lstset{language=Python}
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−\begin{lstlisting}
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−In []:  s in week
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−In []:  s.lower()[:3] in week
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−\end{lstlisting}
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−\end{frame}
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−\begin{frame}
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−\frametitle{Question 3}
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−\label{sec-6}
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−
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−  Given \texttt{email} -- \texttt{info@fossee[dot]in}
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−
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−  Replace the \texttt{[dot]} with \texttt{.} in \texttt{email}
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−\end{frame}
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−\begin{frame}[fragile]
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−\frametitle{Solution 3}
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−\label{sec-7}
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−
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−\lstset{language=Python}
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−\begin{lstlisting}
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−email.replace('[dot], '.')
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−print email
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−\end{lstlisting}
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−\end{frame}
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−\begin{frame}
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−\frametitle{Question 4}
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−\label{sec-8}
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−
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−  From the \texttt{email\_str} that we generated, change the separator to be a
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−  semicolon instead of a comma.
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−\end{frame}
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−\begin{frame}[fragile]
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−\frametitle{Solution 4}
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−\label{sec-9}
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−
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−\lstset{language=Python}
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−\begin{lstlisting}
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−email_str = email_str.replace(",", ";")
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−\end{lstlisting}
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−\end{frame}
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−\begin{frame}
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−\frametitle{Summary}
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−\label{sec-10}
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−
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−  You should now be able to --
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−\begin{itemize}
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−\item Slice strings and get sub-strings out of them
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−\item Reverse strings
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−\item Replace characters in strings.
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−\item Convert strings to upper or lower case
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−\item Join a list of strings
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−\end{itemize}
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−\end{frame}
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−\begin{frame}
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−\frametitle{Thank you!}
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−\label{sec-11}
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−
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−  \begin{block}{}
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−  \begin{center}
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−  This spoken tutorial has been produced by the
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−  \textcolor{blue}{FOSSEE} team, which is funded by the 
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−  \end{center}
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−  \begin{center}
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−    \textcolor{blue}{National Mission on Education through \\
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−      Information \& Communication Technology \\ 
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−      MHRD, Govt. of India}.
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−  \end{center}  
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−  \end{block}
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−\end{frame}
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−
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−\end{document}