.. link: http://dgplug.org/summertraining/2013/posts/rahulc93-sharevalue-20130712-104156.html
.. description: 
.. tags: 
.. date: 2013/07/12 10:41:57
.. title: rahulc93 sharevalue 20130712-104156
.. slug: rahulc93-sharevalue-20130712-104156

sharevalue
==========

In this problem we will take a NASDAQ code as input from the user and return the current share value for that company

Source Code
-----------

The code to the problem can be found `here <https://github.com/rahulc93/homeTasks2013/blob/master/sharevalue/sharevalue.py>`_

Solution
-----------

Here is the solution to the the problem.

.. code:: python

    #!/usr/bin/env python

    import urllib2
    import sys

    def get_value(nasdaq):
        """
        This function fetches the current share value according to the NASDAQ code given by the user and displays it.
    
        :arg nasdaq: NASDAQ code given by the user
        """

        link = 'http://download.finance.yahoo.com/d/quotes.csv?s=%s&f=l1' % (nasdaq)  # store the recquired URL acording to the NASDAQ value in the 'link' variable
        link_open = urllib2.urlopen(link)  # opening the URL
        price =  float(link_open.read())  # store the value retrieved from the URL in the 'price' variable
        if price == 0.00:  # incorrect NASDAQ value given by user
            print 'The NADAQ code entered is wrong. '  # display an error message
        else:
            print 'The latest share value is %s' % (price)  # display the value obtained from the URL

    def main(nasdaq):
        """
        This function recieves the NASDAQ code and calls the desired function to fetch the current share value.

        :arg nasdaq: NASDAQ code given by the user
        """

        get_value(sys.argv[1])  # calls the 'get_value' method, passing to it the first command line parameter as argument


    if __name__ == '__main__':
        if len(sys.argv) != 2:  # incorrect syntax for executing the program from command line
            print 'Wrong syntax. '  # display error message
            sys.exit(-1)  # abnormal termination
        else:  #syntax is ok
            main(sys.argv[1])  # pass the NASDAQ code to main given by user
        sys.exit(0)  # successful termination

Run the program
---------------

To run this script, follow the steps.

1. Change the file's permissions and make it executable::

        $ chmod +x sharevalue.py

2. Execute the file::

        $ ./sharevalue.py


*Alternatively*, you can also do::

        $ python mount.py