1 #+LaTeX_CLASS: beamer

     2 #+LaTeX_CLASS_OPTIONS: [presentation]

     3 #+BEAMER_FRAME_LEVEL: 1

     4 

     5 #+BEAMER_HEADER_EXTRA: \usetheme{Warsaw}\usecolortheme{default}\useoutertheme{infolines}\setbeamercovered{transparent}

     6 #+COLUMNS: %45ITEM %10BEAMER_env(Env) %10BEAMER_envargs(Env Args) %4BEAMER_col(Col) %8BEAMER_extra(Extra)

     7 #+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

     8 

     9 #+LaTeX_CLASS: beamer

    10 #+LaTeX_CLASS_OPTIONS: [presentation]

    11 

    12 #+LaTeX_HEADER: \usepackage[english]{babel} \usepackage{ae,aecompl}

    13 #+LaTeX_HEADER: \usepackage{mathpazo,courier,euler} \usepackage[scaled=.95]{helvet}

    14 

    15 #+LaTeX_HEADER: \usepackage{listings}

    16 

    17 #+LaTeX_HEADER:\lstset{language=Python, basicstyle=\ttfamily\bfseries,

    18 #+LaTeX_HEADER:  commentstyle=\color{red}\itshape, stringstyle=\color{darkgreen},

    19 #+LaTeX_HEADER:  showstringspaces=false, keywordstyle=\color{blue}\bfseries}

    20 

    21 #+TITLE: Using python modules

    22 #+AUTHOR: FOSSEE

    23 #+EMAIL:     

    24 #+DATE:    

    25 

    26 #+DESCRIPTION: 

    27 #+KEYWORDS: 

    28 #+LANGUAGE:  en

    29 #+OPTIONS:   H:3 num:nil toc:nil \n:nil @:t ::t |:t ^:t -:t f:t *:t <:t

    30 #+OPTIONS:   TeX:t LaTeX:nil skip:nil d:nil todo:nil pri:nil tags:not-in-toc

    31 

    32 * Outline

    33   - Running python scripts from command line

    34   - Importing python modules

    35   - Importing scipy \& pylab modules

    36   - About python standard library.

    37 * Running Python script from command line

    38   - Create a script, open text editor and type the following

    39     : print "hello world!"

    40     : print 

    41   - Save the script as ~hello.py~

    42 * Running Python script from command line (cont'd)

    43   - Run the script

    44     : $ python hello.py

    45   /Syntax :/ *python filename*

    46 * Four plot problem

    47   #+begin_latex

    48     \begin{center}

    49       \includegraphics[scale=0.4]{four_plot}    

    50     \end{center}

    51   #+end_latex   

    52 * Fix ~linspace()~ problem

    53   : from scipy import *

    54 * Fix ~plot()~ problem

    55   : from pylab import *

    56 * Better way of fixing

    57   : from scipy import linspace

    58   instead of

    59   : from scipy import *

    60     ~*~ means import all functions from name-space ~scipy~.

    61 * Instead of ~*~

    62   :  from scipy import linspace, pi, sin

    63   :  from pylab import plot, legend, annotate

    64   :  from pylab import xlim, ylim, title, show

    65   Is better than, ~from scipy import *~ \& ~from pylab import *~.

    66 * Another Fix

    67   #+begin_src python

    68     import scipy

    69     import pylab

    70     x = scipy.linspace(-5*scipy.pi, 5*scipy.pi, 500)

    71     pylab.plot(x, x, 'b')

    72     pylab.plot(x, -x, 'b')

    73     pylab.plot(x, scipy.sin(x), 'g', linewidth=2)

    74     pylab.plot(x, x*scipy.sin(x), 'r', linewidth=3)

    75     pylab.legend(['x', '-x', 'sin(x)', 'xsin(x)'])

    76     pylab.annotate('origin', xy = (0, 0))

    77     pylab.xlim(-5*scipy.pi, 5*scipy.pi)

    78     pylab.ylim(-5*scipy.pi, 5*scipy.pi)

    79   #+end_src

    80 * Exercise 1

    81   Write a python script to plot a sine wave from 

    82   #+begin_latex

    83     $-2\Pi$

    84   #+end_latex

    85   to 

    86   #+begin_latex

    87     $2\Pi$

    88   #+end_latex

    89   .

    90 * What is a module?

    91   Module is simply a file containing Python definitions and

    92   statements. Definitions from a module can be imported into other

    93   modules or into the main module.

    94 * Python standard library

    95   Python has a very rich standard library of modules.

    96   - Few libraries

    97     - Math: ~math~, ~random~

    98     - Internet access: ~urllib2~, ~smtplib~

    99     - System, Command line arguments: ~sys~

   100     - Operating system interface: ~os~

   101     - regular expressions: ~re~

   102     - compression: ~gzip~, ~zipfile~, ~tarfile~

   103   - More information

   104     - [[http://docs.python.org/library]]

   105 * Summary

   106   - Running scripts from command line

   107   - Learned about modules

   108     - importing modules

   109   - Python standard library

   110 * Thank you!

   111 #+begin_latex

   112   \begin{block}{}

   113   \begin{center}

   114   This spoken tutorial has been produced by the

   115   \textcolor{blue}{FOSSEE} team, which is funded by the 

   116   \end{center}

   117   \begin{center}

   118     \textcolor{blue}{National Mission on Education through \\

   119       Information \& Communication Technology \\ 

   120       MHRD, Govt. of India}.

   121   \end{center}  

   122   \end{block}

   123 #+end_latex

   124 

   125