title: PyCharm - project structure - sources vs resources
body: <p>In PyCharm directories could be marked as:</p>
  
  <ul>
  <li><strong>Sources</strong></li>
  <li><strong>Resources</strong></li>
  <li>Templates</li>
  <li>Excluded</li>
  </ul>
  
  <p>I wonder what is the difference for sources and resources.</p>
  
  <p>I can't find any informations about my question in documentation. Is there any definition?</p>