title: How to add a Python import path using a .pth file
body: <p>If I put a *.pth file in site-packages it's giving an <code>ImportError</code>.
  I'm not getting how to import by creating a *.pth file.</p>
  
  <p><em>(Refers to <a href="https://stackoverflow.com/questions/697281/importing-in-python">importing in python</a>)</em></p>