title: Running a python script on all the files in a directory
body: <p>I have a Python script that reads through a text csv file and creates a playlist file. However I can only do one at a time, like:</p>
  
  <pre><code>python playlist.py foo.csv foolist.txt
  </code></pre>
  
  <p>However, I have a directory of files that need to be made into a playlist, with different names, and sometimes a different number of files.</p>
  
  <p>So far I have looked at creating a txt file with a list of all the names of the file in the directory, then loop through each line of that, however I know there must be an easier way to do it.</p>