\documentclass[12pt]{article}
%\title{Plotting Data}
%\author{FOSSEE}
\begin{document}
\date{}
\vspace{-1in}
\begin{center}
\LARGE{Plotting Data}\\
\large{FOSSEE}
\end{center}
\section{Scripts}
IPython History
\begin{verbatim}
In [1]: %hist
In [2]: %hist -n
\end{verbatim}

Running a Script
\begin{verbatim}
In [3]:  %run script_name.py
\end{verbatim}

\section{Plotting from Data files}
\begin{verbatim}
In [1]: L = [] #Empty List
In [2]: T = []
In [3]: for line in open('pendulum.txt'): # Opening & Reading files
  ....:     points = line.split() # Splitting a string
  ....:     L.append(float(points[0])) # Appending to a list
  ....:     T.append(float(points[1]))
In [4]: TSq = []
In [5]: for t in T:  #Iterating through lists
 ....:     TSq.append(t*t)
In [6]: plot(L, TSq, '.') # Plotting points
\end{verbatim}
\end{document}