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authorPuneeth Chaganti2010-12-01 16:51:35 +0530
committerPuneeth Chaganti2010-12-01 16:51:35 +0530
commitf3a34dfb4e879f3eb7274704f44546aac4add88f (patch)
tree1cb0a8cc5dbd5ee2b374350915ed2addfa0fb447 /getting-started-strings
parent347866ed0d29db61ee062563b1e1616cfb85588c (diff)
downloadst-scripts-f3a34dfb4e879f3eb7274704f44546aac4add88f.tar.gz
st-scripts-f3a34dfb4e879f3eb7274704f44546aac4add88f.tar.bz2
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Renamed all LOs to match with their names in progress.org.
Diffstat (limited to 'getting-started-strings')
-rw-r--r--getting-started-strings/quickref.tex8
-rw-r--r--getting-started-strings/script.rst191
-rw-r--r--getting-started-strings/slides.org80
-rw-r--r--getting-started-strings/slides.tex129
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diff --git a/getting-started-strings/quickref.tex b/getting-started-strings/quickref.tex
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-Creating a string:\\
-{\ex \lstinline| s = ``Hello World''|} -- Single quotes and triple
-quotes can also be used.
-
-Accessing individual elements:\\
-{\ex \lstinline| s[5]|} -- Elements can be accessed with their index
-
-Strings are immutable.
diff --git a/getting-started-strings/script.rst b/getting-started-strings/script.rst
deleted file mode 100644
index 754fede..0000000
--- a/getting-started-strings/script.rst
+++ /dev/null
@@ -1,191 +0,0 @@
-.. Objectives
-.. ----------
-
-.. At the end of this tutorial, you should know --
-
-.. 1. How to define strings
-.. #. Different ways of defining a string
-.. #. How to concatenate strings
-.. #. How to print a string repeatedly
-.. #. Accessing individual elements of the string
-.. #. Immutability of strings
-
-.. Prerequisites
-.. -------------
-
-.. 1. getting started with ipython
-
-.. Author : Madhu
- Internal Reviewer : Punch
- External Reviewer :
- Language Reviewer : Bhanukiran
- Checklist OK? : <15-11-2010, Anand, OK> [2010-10-05]
-
-Script
-------
-
-{{{ Show the slide containing the title }}}
-
-Hello friends. Welcome to this spoken tutorial on Getting started with
-strings.
-
-{{{ Show the slide containing the outline }}}
-
-In this tutorial, we will look at what we really mean by strings, how
-Python supports the use of strings and some of the operations that can
-be performed on strings.
-
-{{{ Shift to terminal and start ipython }}}
-
-To begin with let us start ipython, by typing::
-
- ipython
-
-on the terminal
-
-So, what are strings? In Python anything within either single quotes
-or double quotes or triple single quotes or triple double quotes are
-strings.
-
-{{{ Type in ipython the following and read them as you type }}}::
-
- 'This is a string'
- "This is a string too'
- '''This is a string as well'''
- """This is also a string"""
- 'p'
- ""
-
-Note that it really doesn't matter how many characters are present in
-the string. The last example is a null string or an empty string.
-
-Having more than one control character to define strings is handy when
-one of the control characters itself is part of the string. For
-example::
-
- "Python's string manipulation functions are very useful"
-
-By having multiple control characters, we avoid the need for
-escaping characters -- in this case the apostrophe.
-
-The triple quoted strings let us define multi-line strings without
-using any escaping. Everything within the triple quotes is a single
-string no matter how many lines it extends::
-
- """Having more than one control character to define
- strings come as very handy when one of the control
- characters itself is part of the string."""
-
-We can assign this string to any variable::
-
- a = 'Hello, World!'
-
-Now 'a' is a string variable. String is a collection of characters. In
-addition string is an immutable collection. So all the operations that
-are applicable to any other immutable collection in Python works on
-string as well. So we can add two strings::
-
- a = 'Hello'
- b = 'World'
- c = a + ', ' + b + '!'
-
-We can add string variables as well as the strings themselves all in
-the same statement. The addition operation performs the concatenation
-of two strings.
-
-Similarly we can multiply a string with an integer::
-
- a = 'Hello'
- a * 5
-
-gives another string in which the original string 'Hello' is repeated
-5 times.
-
-Following is an exercise that you must do.
-
-%% %% Obtain the string ``%% -------------------- %%`` (20 hyphens)
- without typing out all the twenty hyphens.
-
-Please, pause the video here. Do the exercise and then continue.
-
-::
-
- s = "%% " + "-"*20 + " %%"
-
-Let's now look at accessing individual elements of strings. Since,
-strings are collections we can access individual items in the string
-using the subscripts::
-
- a[0]
-
-gives us the first character in the string. The indexing starts from 0
-for the first character and goes up to n-1 for the last character. We
-can access the strings from the end using negative indices::
-
- a[-1]
-
-gives us the last element of the string and
-::
-
- a[-2]
-
-gives us second element from the end of the string
-
-Following is an exercise that you must do.
-
-%% %% Given a string, ``s = "Hello World"``, what is the output of::
-
- s[-5]
- s[-10]
- s[-15]
-
-Please, pause the video here. Do the exercise and then continue.
-
-::
-
- s[-5]
-
-gives us 'W'
-::
-
- s[-10]
-
-gives us 'e' and
-::
-
- s[-15]
-
-gives us an ``IndexError``, as should be expected, since the string
-given to us is only 11 characters long.
-
-Let us attempt to change one of the characters in a string::
-
- a = 'hello'
- a[0] = 'H'
-
-As said earlier, strings are immutable. We cannot manipulate a
-string. Although there are some methods which let us manipulate
-strings, we will look at them in the advanced session on strings. In
-addition to the methods that let us manipulate the strings we have
-methods like split which lets us break the string on the specified
-separator, the join method which lets us combine the list of strings
-into a single string based on the specified separator.
-
-{{{ Show summary slide }}}
-
-This brings us to the end of another session. In this tutorial session
-we learnt
-
- * How to define strings
- * Different ways of defining a string
- * String concatenation and repetition
- * Accessing individual elements of the string
- * Immutability of strings
-
-{{{ Show the "sponsored by FOSSEE" slide }}}
-
-This tutorial was created as a part of FOSSEE project, NME ICT, MHRD India
-
-Hope you have enjoyed and found it useful.
-Thank you!
-
diff --git a/getting-started-strings/slides.org b/getting-started-strings/slides.org
deleted file mode 100644
index a1df437..0000000
--- a/getting-started-strings/slides.org
+++ /dev/null
@@ -1,80 +0,0 @@
-#+LaTeX_CLASS: beamer
-#+LaTeX_CLASS_OPTIONS: [presentation]
-#+BEAMER_FRAME_LEVEL: 1
-
-#+BEAMER_HEADER_EXTRA: \usetheme{Warsaw}\usecolortheme{default}\useoutertheme{infolines}\setbeamercovered{transparent}
-#+COLUMNS: %45ITEM %10BEAMER_env(Env) %10BEAMER_envargs(Env Args) %4BEAMER_col(Col) %8BEAMER_extra(Extra)
-#+PROPERTY: BEAMER_col_ALL 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0 :ETC
-
-#+LaTeX_CLASS: beamer
-#+LaTeX_CLASS_OPTIONS: [presentation]
-
-#+LaTeX_HEADER: \usepackage[english]{babel} \usepackage{ae,aecompl}
-#+LaTeX_HEADER: \usepackage{mathpazo,courier,euler} \usepackage[scaled=.95]{helvet}
-
-#+LaTeX_HEADER: \usepackage{listings}
-
-#+LaTeX_HEADER:\lstset{language=Python, basicstyle=\ttfamily\bfseries,
-#+LaTeX_HEADER: commentstyle=\color{red}\itshape, stringstyle=\color{darkgreen},
-#+LaTeX_HEADER: showstringspaces=false, keywordstyle=\color{blue}\bfseries}
-
-#+TITLE:
-#+AUTHOR: FOSSEE
-#+EMAIL:
-#+DATE:
-
-#+DESCRIPTION:
-#+KEYWORDS:
-#+LANGUAGE: en
-#+OPTIONS: H:3 num:nil toc:nil \n:nil @:t ::t |:t ^:t -:t f:t *:t <:t
-#+OPTIONS: TeX:t LaTeX:nil skip:nil d:nil todo:nil pri:nil tags:not-in-toc
-
-* Outline
-*** Defining strings
-*** Concatenation
-*** Accessing individual elements
-*** Immutability of strings
-* Question 1
- Obtain the string ~%% -------------------- %%~ (20 hyphens) without
- typing out all the twenty hyphens.
-* Solution 1
- #+begin_src python
- s = "%% " + "-"*20 + " %%"
- #+end_src
-* Question 2
- Given a string, ~s~ which is ~Hello World~ , what is the output of::
- #+begin_src python
- s[-5]
- s[-10]
- s[-15]
- #+end_src
-* Solution 2
- #+begin_src python
- 'W'
- 'e'
- IndexError
- #+end_src
-* Summary
- In this tutorial we have learnt
- + How to define strings
- + Different ways of defining a string
- + String concatenation and repetition
- + Accessing individual elements of the string
- + Immutability of strings
-
-* Thank you!
-#+begin_latex
- \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_latex
-
-
diff --git a/getting-started-strings/slides.tex b/getting-started-strings/slides.tex
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-% Created 2010-11-10 Wed 10:46
-\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{}
-\author{FOSSEE}
-\date{}
-
-\usetheme{Warsaw}\usecolortheme{default}\useoutertheme{infolines}\setbeamercovered{transparent}
-\begin{document}
-
-
-
-
-
-
-
-
-
-
-
-\begin{frame}
-\frametitle{Outline}
-\label{sec-1}
-\begin{itemize}
-
-\item Defining strings\\
-\label{sec-1_1}%
-\item Concatenation\\
-\label{sec-1_2}%
-\item Accessing individual elements\\
-\label{sec-1_3}%
-\item Immutability of strings\\
-\label{sec-1_4}%
-\end{itemize} % ends low level
-\end{frame}
-\begin{frame}
-\frametitle{Question 1}
-\label{sec-2}
-
- Obtain the string \texttt{\%\% -------------------- \%\%} (20 hyphens) without
- typing out all the twenty hyphens.
-\end{frame}
-\begin{frame}[fragile]
-\frametitle{Solution 1}
-\label{sec-3}
-
-\lstset{language=Python}
-\begin{lstlisting}
-s = "%% " + "-"*20 + " %%"
-\end{lstlisting}
-\end{frame}
-\begin{frame}[fragile]
-\frametitle{Question 2}
-\label{sec-4}
-
- Given a string, \texttt{s} which is \texttt{Hello World} , what is the output of::
-\lstset{language=Python}
-\begin{lstlisting}
-s[-5]
-s[-10]
-s[-15]
-\end{lstlisting}
-\end{frame}
-\begin{frame}[fragile]
-\frametitle{Solution 2}
-\label{sec-5}
-
-\lstset{language=Python}
-\begin{lstlisting}
-'W'
-'e'
-IndexError
-\end{lstlisting}
-\end{frame}
-\begin{frame}
-\frametitle{Summary}
-\label{sec-6}
-
- In this tutorial we have learnt
-\begin{itemize}
-\item How to define strings
-\item Different ways of defining a string
-\item String concatenation and repetition
-\item Accessing individual elements of the string
-\item Immutability of strings
-\end{itemize}
-
-
-\end{frame}
-\begin{frame}
-\frametitle{Thank you!}
-\label{sec-7}
-
- \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}