--- a/dictionaries/script.rst	Mon Oct 11 22:44:55 2010 +0530
+++ b/dictionaries/script.rst	Mon Oct 11 23:03:49 2010 +0530
@@ -35,6 +35,8 @@
 
 {{{ start ipython interpreter by issuing command ipython -pylab }}}
 
+{{{ switch to next slide, Creating dictionary }}}
+
 Let us start by creating an empty dictionary, type the following in
 your IPython interpreter.
 ::
@@ -74,6 +76,8 @@
 in dictionaries the order cannot be predicted and you can see that the
 values are not in the order that we entered in.
 
+{{{ switch to next slide, accessing elements }}}
+
 Like in lists, the elements in a dictionary can be accessed using the
 index, here the index is the key. Try,
 ::
@@ -153,14 +157,16 @@
 exercise }}}
 
 Now let us try to print the data in the dictionary. We can use ``for``
-loop to iterate.
+loop to iterate. Pause here and try to do it yourself.
+
+It can be solved as,
 ::
 
     for each in extensions.keys():
         print each, "-->", extensions[each]
 
 
-{{{ switch to next slide, recap }}}
+{{{ switch to next slide, summary }}}
 
 This brings us to the end of this tutorial, we learned dictionaries
 and saw how to create an empty dictionary, build a dictionary with

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/dictionaries/slides.org	Mon Oct 11 23:03:49 2010 +0530
@@ -0,0 +1,117 @@
+#+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: Dictionaries
+#+AUTHOR: FOSSEE
+#+EMAIL: info@fossee.in   
+#+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
+  - Creating dictionaries
+    - empty dictionaries
+    - with data
+  - Keys and values
+  - Checking for elements
+  - Iterating over elements
+
+* Overview of Dictionaries
+  - A dictionary contains meaning of words
+    - /Word/ is the /key/ here.
+    - /Meaning/ is the /value/ here.
+  - A Key-Value pair data structure
+    - Provide key-value mappings
+
+* Creating dictionary
+  - Empty dictionary
+    - ~mt_dict = {}~
+      - ~[]~ - lists
+      - ~{}~ - dictionaries
+  - With data
+    #+begin_src python
+        extensions = {'jpg' : 'JPEG Image', 
+	              'py' : 'Python script',
+                      'html' : 'Html document', 
+                      'pdf' : 'Portable Document Format'}
+    #+end_src
+
+   *Note* - ordering in dictionaries cannot be relied on
+* Accessing Elements
+  - syntax
+    : extensions[key]
+  
+  : In []: print extensions['jpg']
+  : Out []: JPEG Image
+  : In []: print extensions['zip']
+* Adding and Deleting values
+  - Adding a new value
+    : In []: extension['cpp'] = 'C++ code'
+    adds a new key /cpp/ with /C++ code/ as value
+  - Deleting values
+    : In []: del extensions['pdf']
+    deletes the key-value pair identified by /pdf/
+  - Changing value associated with a key
+    : In []: extension['cpp'] = 'C++ source code'
+    changes the value of the existing key
+* Checking for container-ship of keys
+  : In []: 'py' in extensions
+  : Out []: True
+  Returns *True* if the /key/ is found.
+  : In []: 'odt' in extensions
+  : Out []: False
+  Returns *False* if the /key/ is not found.
+
+* Retrieve keys and values
+  - ~.keys()~ method
+    : In []: extensions.keys()
+    Returns a list of keys in the dictionary.
+  - ~.values()~ method
+    : In []: extensions.values()
+    Returns the list of values in the dictionary.
+* Exercise 1
+  Print the keys and values in the dictionary one by one.
+* Summary
+  - Creating dictionaries
+    - empty dictionaries
+    - with data
+  - ~.keys()~ method
+  - ~.values()~ method
+  - Iterating over dictionaries
+* 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
+
+

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/dictionaries/slides.tex	Mon Oct 11 23:03:49 2010 +0530
@@ -0,0 +1,229 @@
+% Created 2010-10-11 Mon 23:02
+\documentclass[presentation]{beamer}
+\usepackage[latin1]{inputenc}
+\usepackage[T1]{fontenc}
+\usepackage{fixltx2e}
+\usepackage{graphicx}
+\usepackage{longtable}
+\usepackage{float}
+\usepackage{wrapfig}
+\usepackage{soul}
+\usepackage{t1enc}
+\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{Dictionaries}
+\author{FOSSEE}
+\date{}
+
+\usetheme{Warsaw}\usecolortheme{default}\useoutertheme{infolines}\setbeamercovered{transparent}
+\begin{document}
+
+\maketitle
+
+
+
+
+
+
+
+
+
+\begin{frame}
+\frametitle{Outline}
+\label{sec-1}
+
+\begin{itemize}
+\item Creating dictionaries
+
+\begin{itemize}
+\item empty dictionaries
+\item with data
+\end{itemize}
+
+\item Keys and values
+\item Checking for elements
+\item Iterating over elements
+\end{itemize}
+\end{frame}
+\begin{frame}
+\frametitle{Overview of Dictionaries}
+\label{sec-2}
+
+\begin{itemize}
+\item A dictionary contains meaning of words
+
+\begin{itemize}
+\item \emph{Word} is the \emph{key} here.
+\item \emph{Meaning} is the \emph{value} here.
+\end{itemize}
+
+\item A Key-Value pair data structure
+
+\begin{itemize}
+\item Provide key-value mappings
+\end{itemize}
+
+\end{itemize}
+\end{frame}
+\begin{frame}[fragile]
+\frametitle{Creating dictionary}
+\label{sec-3}
+
+\begin{itemize}
+\item Empty dictionary
+
+\begin{itemize}
+\item \texttt{mt\_dict = \{\}}
+
+\begin{itemize}
+\item \texttt{[]} - lists
+\item \texttt{\{\}} - dictionaries
+\end{itemize}
+
+\end{itemize}
+
+\item With data
+\begin{verbatim}
+extensions = {'jpg' : 'JPEG Image', 
+              'py' : 'Python script',
+              'html' : 'Html document', 
+              'pdf' : 'Portable Document Format'}
+\end{verbatim}
+
+   \textbf{Note} - ordering in dictionaries cannot be relied on
+\end{itemize}
+\end{frame}
+\begin{frame}[fragile]
+\frametitle{Accessing Elements}
+\label{sec-4}
+
+\begin{itemize}
+\item syntax
+\begin{verbatim}
+     extensions[key]
+\end{verbatim}
+
+\end{itemize}
+
+  
+\begin{verbatim}
+   In []: print extensions['jpg']
+   Out []: JPEG Image
+   In []: print extensions['zip']
+\end{verbatim}
+\end{frame}
+\begin{frame}[fragile]
+\frametitle{Adding and Deleting values}
+\label{sec-5}
+
+\begin{itemize}
+\item Adding a new value
+\begin{verbatim}
+     In []: extension['cpp'] = 'C++ code'
+\end{verbatim}
+
+    adds a new key \emph{cpp} with \emph{C++ code} as value
+\item Deleting values
+\begin{verbatim}
+     In []: del extensions['pdf']
+\end{verbatim}
+
+    deletes the key-value pair identified by \emph{pdf}
+\item Changing value associated with a key
+\begin{verbatim}
+     In []: extension['cpp'] = 'C++ source code'
+\end{verbatim}
+
+    changes the value of the existing key
+\end{itemize}
+\end{frame}
+\begin{frame}[fragile]
+\frametitle{Checking for container-ship of keys}
+\label{sec-6}
+
+\begin{verbatim}
+   In []: 'py' in extensions
+   Out []: True
+\end{verbatim}
+
+  Returns \textbf{True} if the \emph{key} is found.
+\begin{verbatim}
+   In []: 'odt' in extensions
+   Out []: False
+\end{verbatim}
+
+  Returns \textbf{False} if the \emph{key} is not found.
+\end{frame}
+\begin{frame}[fragile]
+\frametitle{Retrieve keys and values}
+\label{sec-7}
+
+\begin{itemize}
+\item \texttt{.keys()} method
+\begin{verbatim}
+     In []: extensions.keys()
+\end{verbatim}
+
+    Returns a list of keys in the dictionary.
+\item \texttt{.values()} method
+\begin{verbatim}
+     In []: extensions.values()
+\end{verbatim}
+
+    Returns the list of values in the dictionary.
+\end{itemize}
+\end{frame}
+\begin{frame}
+\frametitle{Exercise 1}
+\label{sec-8}
+
+  Print the keys and values in the dictionary one by one.
+\end{frame}
+\begin{frame}
+\frametitle{Summary}
+\label{sec-9}
+
+\begin{itemize}
+\item Creating dictionaries
+
+\begin{itemize}
+\item empty dictionaries
+\item with data
+\end{itemize}
+
+\item \texttt{.keys()} method
+\item \texttt{.values()} method
+\item Iterating over dictionaries
+\end{itemize}
+\end{frame}
+\begin{frame}
+\frametitle{Thank you!}
+\label{sec-10}
+
+  \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}