title: Opening existing PowerPoint from a directory with Python 3.5
body: <p>Open an existing PowerPoint Presentation from a directory
  Example from here: <a href="https://stackoverflow.com/questions/32639900/charts-from-excel-to-powerpoint-with-python">Charts from Excel to PowerPoint with Python</a></p>
  
  <p>My situation is different - the link showed how to to open a new presentation not a saved existing one.</p>
  
  <p>error message:</p>
  
  <blockquote>
    <p>module None. </p>
  </blockquote>