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% Created 2010-10-11 Mon 11:27
\documentclass[presentation]{beamer}
\usepackage[latin1]{inputenc}
\usepackage[T1]{fontenc}
\usepackage{fixltx2e}
\usepackage{graphicx}
\usepackage{longtable}
\usepackage{float}
\usepackage{wrapfig}
\usepackage{soul}
\usepackage{textcomp}
\usepackage{marvosym}
\usepackage{wasysym}
\usepackage{latexsym}
\usepackage{amssymb}
\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}
\date{}
\usetheme{Warsaw}\usecolortheme{default}\useoutertheme{infolines}\setbeamercovered{transparent}
\begin{document}
\maketitle
\begin{frame}
\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}
\end{frame}
\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}
\begin{frame}[fragile]
\frametitle{Solution 1}
\label{sec-3}
\lstset{language=Python}
\begin{lstlisting}
In []: s[1:-1]
\end{lstlisting}
\end{frame}
\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}
\begin{frame}[fragile]
\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.
\end{frame}
\begin{frame}[fragile]
\frametitle{Solution 4}
\label{sec-9}
\lstset{language=Python}
\begin{lstlisting}
email_str = email_str.replace(",", ";")
\end{lstlisting}
\end{frame}
\begin{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}
\begin{block}{}
\begin{center}
This spoken tutorial has been produced by the
\textcolor{blue}{FOSSEE} team, which is funded by the
\end{center}
\begin{center}
\textcolor{blue}{National Mission on Education through \\
Information \& Communication Technology \\
MHRD, Govt. of India}.
\end{center}
\end{block}
\end{frame}
\end{document}
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