Renamed all LOs to match with their names in progress.org.

5 files changed, 479 insertions, 0 deletions

diff --git a/getting_started_with_files/pendulum.txt b/getting_started_with_files/pendulum.txt
new file mode 100644
index 0000000..7e07566
--- /dev/null
+++ b/getting_started_with_files/pendulum.txt
@@ -0,0 +1,90 @@
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diff --git a/getting_started_with_files/quickref.tex b/getting_started_with_files/quickref.tex
new file mode 100644
index 0000000..17b4d33
--- /dev/null
+++ b/getting_started_with_files/quickref.tex
@@ -0,0 +1,12 @@
+\textbf{Getting Started -- files}
+
+\lstinline|f = open('filename')| returns a file object. \lstinline|f|
+can be used to perform further operations on the file. 
+
+\lstinline|f.read()| reads the whole file and returns the contents. 
+
+\lstinline|f.close()| closes the file. 
+
+\lstinline|for line in open('filename'):| -- iterate over the file
+line-by-line. 
+
diff --git a/getting_started_with_files/script.rst b/getting_started_with_files/script.rst
new file mode 100644
index 0000000..bd3dc9b
--- /dev/null
+++ b/getting_started_with_files/script.rst
@@ -0,0 +1,189 @@
+.. Objectives
+.. ----------
+
+.. By the end of this tutorial, you will be able to 
+.. 1. Open and read the contents of a file. 
+.. #. Read files line by line. 
+.. #. Read all the contents of the file at once. 
+.. #. Close open files. 
+
+.. Prerequisites
+.. -------------
+
+.. 1. getting started with ipython
+.. #. getting started with lists
+.. #. getting started with for
+     
+.. Author              : Puneeth
+   Internal Reviewer   : Anoop Jacob Thomas<anoop@fossee.in>
+   External Reviewer   :
+   Language Reviewer    : Bhanukiran
+   Checklist OK?       : <06-11-2010, Anand, OK> [2010-10-05]
+
+Script
+------
+
+{{{ Show the slide containing title }}}
+
+Hello Friends. Welcome to the tutorial on getting started with files. 
+
+{{{ Show the outline for this tutorial }}} 
+
+In this tutorial we shall learn to read files, and do some basic
+actions on the file, like opening and reading a file, closing a
+file, iterating through the file line-by-line, and appending the
+lines of a file to a list. 
+
+{{{ switch back to the terminal }}}
+
+As usual, we start IPython, using 
+::
+
+  ipython -pylab 
+
+Let us first open the file, ``pendulum.txt`` present in
+``/home/fossee/``. 
+::
+
+  f = open('/home/fossee/pendulum.txt')
+
+``f`` is called a file object. Let us type ``f`` on the terminal to
+see what it is. 
+::
+
+  f
+
+The file object shows, the file which is open and the mode (read
+or write) in which it is open. Notice that it is open in read only
+mode, here. 
+
+We shall first learn to read the whole file into a single
+variable. Later, we shall look at reading it line-by-line. We use
+the ``read`` method of ``f`` to read, all the contents of the file
+into the variable ``pend``. 
+::
+
+  pend = f.read()
+
+Now, let us see what is in ``pend``, by typing 
+::
+
+  print pend
+
+We can see that ``pend`` has all the data of the file. Type just ``pend``
+to see more explicitly, what it contains. 
+::
+
+  pend
+
+Following is an exercise that you must do. 
+
+{{ show slide with Question 1 }}
+
+%%1%% Split the variable into a list, ``pend_list``, of the lines in
+the file. Hint, use the tab command to see what methods the string
+variable has.
+
+Please, pause the video here. Do the exercise and then continue. 
+
+{{ show slide with Solution 1 }}
+
+::
+
+  pend_list = pend.splitlines()
+
+  pend_list
+
+Now, let us learn to read the file line-by-line. But, before that we
+will have to close the file, since the file has already been read till
+the end.
+
+Let us close the file opened into f.
+::
+
+  f.close()
+
+Let us again type ``f`` on the prompt to see what it shows. 
+::
+
+  f
+
+Notice, that it now says the file has been closed. It is a good
+programming practice to close any file objects that we have
+opened, after their job is done.
+
+Let us, now move on to reading files line-by-line. 
+
+Following is an exercise that you must do. 
+
+%%2%% Re-open the file ``pendulum.txt`` with ``f`` as the file object.
+
+Please, pause the video here. Do the exercise and then continue. 
+
+We just use the up arrow until we reach the open command and issue
+it again. 
+::
+
+  f = open('/home/fossee/pendulum.txt')
+
+Now, to read the file line-by-line, we iterate over the file
+object line-by-line, using the ``for`` command. Let us iterate over
+the file line-wise and print each of the lines. 
+::
+
+  for line in f:
+      print line
+
+As we already know, ``line`` is variable, sometimes called the loop
+variable, and it is not a keyword. We could have used any other
+variable name, but ``line`` seems meaningful enough.
+
+Instead of just printing the lines, let us append them to a list,
+``line_list``. We first initialize an empty list, ``line_list``. 
+::
+
+  line_list = [ ]
+
+Let us then read the file line-by-line and then append each of the
+lines, to the list. We could, as usual close the file using
+``f.close`` and re-open it. But, this time, let's leave alone the
+file object ``f`` and directly open the file within the for
+statement. This will save us the trouble of closing the file, each
+time we open it. 
+
+::
+
+  for line in open('/home/fossee/pendulum.txt'):
+      line_list.append(line)
+
+Let us see what ``line_list`` contains. 
+::
+
+  line_list
+
+Notice that ``line_list`` is a list of the lines in the file, along
+with the newline characters. If you noticed, ``pend_list`` did not
+contain the newline characters, because the string ``pend`` was
+split on the newline characters. 
+
+Using some string methods, that we shall look at in the tutorial on
+strings, we can strip out the newline characters from the lines. 
+
+.. #[[Anoop: I think the code that are required to be typed can be
+   added to the slide.]]
+
+{{{ show the summary slide }}}
+
+That brings us to the end of this tutorial. In this tutorial we
+have learnt to open and close files, read the data in the files as
+a whole, using the read command or reading it line by line by
+iterating over the file object. 
+
+{{{ 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_with_files/slides.org b/getting_started_with_files/slides.org
new file mode 100644
index 0000000..d9e6428
--- /dev/null
+++ b/getting_started_with_files/slides.org
@@ -0,0 +1,73 @@
+#+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:    Getting started with files
+#+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
+  - Opening and reading contents of a file
+  - Closing open files
+  - Reading all the contents of the file at once
+  - Reading files line by line
+* Question 1
+  Split the variable into a list, =pend_list=, of the lines in the
+  file. Hint, use the tab command to see what methods the string
+  variable has.
+* Solution 1
+  #+begin_src python
+    In []: pend_list = pend.splitlines()
+    
+    In []: pend_list
+  #+end_src
+* Question 2
+  Re-open the file =pendulum.txt= with =f= as the file object.
+* Solution 2
+  #+begin_src python
+    In []:   f = open('/home/fossee/pendulum.txt')
+  #+end_src
+* Summary
+  - Opening a file using =open= function
+  - Reading all the contents of the file at once using =read()= method
+  - Closing open files using the =close= method
+  - Reading files line by line by iterating using a =for= loop
+* 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_with_files/slides.tex b/getting_started_with_files/slides.tex
new file mode 100644
index 0000000..f3e1765
--- /dev/null
+++ b/getting_started_with_files/slides.tex
@@ -0,0 +1,115 @@
+% Created 2010-10-21 Thu 14:35
+\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{Getting started with files}
+\author{FOSSEE}
+\date{}
+
+\usetheme{Warsaw}\usecolortheme{default}\useoutertheme{infolines}\setbeamercovered{transparent}
+\begin{document}
+
+\maketitle
+
+
+
+
+
+
+
+
+
+\begin{frame}
+\frametitle{Outline}
+\label{sec-1}
+
+\begin{itemize}
+\item Opening and reading contents of a file
+\item Closing open files
+\item Reading all the contents of the file at once
+\item Reading files line by line
+\end{itemize}
+\end{frame}
+\begin{frame}
+\frametitle{Question 1}
+\label{sec-2}
+
+  Split the variable into a list, \texttt{pend\_list}, of the lines in the
+  file. Hint, use the tab command to see what methods the string
+  variable has.
+\end{frame}
+\begin{frame}[fragile]
+\frametitle{Solution 1}
+\label{sec-3}
+
+\begin{verbatim}
+In []: pend_list = pend.splitlines()
+
+In []: pend_list
+\end{verbatim}
+\end{frame}
+\begin{frame}
+\frametitle{Question 2}
+\label{sec-4}
+
+  Re-open the file \texttt{pendulum.txt} with \texttt{f} as the file object.
+\end{frame}
+\begin{frame}[fragile]
+\frametitle{Solution 2}
+\label{sec-5}
+
+\begin{verbatim}
+In []:   f = open('/home/fossee/pendulum.txt')
+\end{verbatim}
+\end{frame}
+\begin{frame}
+\frametitle{Summary}
+\label{sec-6}
+
+\begin{itemize}
+\item Opening a file using \texttt{open} function
+\item Reading all the contents of the file at once using \texttt{read()} method
+\item Closing open files using the \texttt{close} method
+\item Reading files line by line by iterating using a \texttt{for} loop
+\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}