Votes
=====

The listeners of a radio station vote on the three songs they have
most liked. Votes are stored in a file where each line contains the
name of a maximum of three songs, separated by a comma and a single
whitespace. An example of this kind of file is file 
:download:`votes_radio.txt <examples/votes_radio.txt>` with the
following content:

      .. literalinclude:: examples/votes_radio.txt
         :language: python3
         :lines: 1-

Note that there are listeners who have only voted one or two songs
while others have voted three songs.

We want to know how many votes got each song. Write the function
:py:func:`votes` that takes two file names (strings). The first one
corresponds to a file as described above and the second one is created
by this function. This second file will contain at each line the
following data corresponding to a song, separated by a star (``'*'``):
number of votes got by this song and name.
    
The file that will be created with the example above will have the
following content:

      .. literalinclude:: examples/results.txt
         :language: python3
         :lines: 1-
    
To solve this exercise we suggest to built first a dictionary from the
first file where the key is the title of a song and the value its
number of votes, and then built the second file using this dictionary.

Save this function into file ``votes.py``. The function must pass the
following doctest:
   
      .. literalinclude:: votes.txt
         :language: python3
         :lines: 3-

.. note::
        These tests can be found in file :download:`votes.txt <votes.txt>`

.. rubric:: Solution

A solution of this function is provided in file :download:`votes.py <solutions/votes.py>`