% Created 2010-10-11 Mon 11:27

\documentclass[presentation]{beamer}

\usepackage{fixltx2e}

\usepackage{graphicx}

\usepackage{longtable}

\usepackage{float}

\usepackage{wrapfig}

\usepackage{soul}

\usepackage{textcomp}

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\usepackage{wasysym}

\usepackage{latexsym}

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\usepackage{hyperref}

\tolerance=1000

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

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

\usepackage{listings}

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

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

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

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

\title{Manipulating strings}

\author{FOSSEE}

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

\maketitle

\frametitle{Outline}

\label{sec-1}

\begin{itemize}

\item Slicing strings to get sub-strings

\item Reversing strings

\item Replacing characters in strings.

\item Converting strings to upper or lower case

\item Joining a list of strings

\end{itemize}

\begin{frame}

\frametitle{Question 1}

\label{sec-2}

  Obtain the sub-string excluding the first and last characters from

  the string \texttt{s}.

\end{frame}

\frametitle{Solution 1}

\label{sec-3}

\lstset{language=Python}

\begin{lstlisting}

In []:  s[1:-1]

\end{lstlisting}

\begin{frame}

\frametitle{Question 2}

\label{sec-4}

  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

  week. Change the solution to this problem, to include forms like,

  SAT, SATURDAY, Saturday and Sat.

\end{frame}

\begin{frame}[fragile]

\frametitle{Solution 2}

\label{sec-5}

\lstset{language=Python}

\begin{lstlisting}

In []:  s in week

In []:  s.lower()[:3] in week

\end{lstlisting}

\end{frame}

\begin{frame}

\frametitle{Question 3}

\label{sec-6}

  Given \texttt{email} -- \texttt{info@fossee[dot]in}

  Replace the \texttt{[dot]} with \texttt{.} in \texttt{email}

\end{frame}

\frametitle{Solution 3}

\label{sec-7}

\lstset{language=Python}

\begin{lstlisting}

email.replace('[dot], '.')

print email

\end{lstlisting}

\end{frame}

\begin{frame}

\frametitle{Question 4}

\label{sec-8}

  From the \texttt{email\_str} that we generated, change the separator to be a

  semicolon instead of a comma.

\begin{frame}[fragile]

\frametitle{Solution 4}

\label{sec-9}

\lstset{language=Python}

\begin{lstlisting}

email_str = email_str.replace(",", ";")

\end{lstlisting}

\end{frame}

\frametitle{Summary}

\label{sec-10}

  You should now be able to --

\begin{itemize}

\item Slice strings and get sub-strings out of them

\item Reverse strings

\item Replace characters in strings.

\item Convert strings to upper or lower case

\item Join a list of strings

\end{itemize}

\end{frame}

\begin{frame}

\frametitle{Thank you!}

\label{sec-11}