title: How to import own packages
body: <p>This is the structure of my files:</p>
  
  <pre><code>D:\projects
    -projects\bin
      -bin\__init__.py
      -bin\app.py
  
    -projects\test
      -test\app_test.py
  
    -projects\__init__.py
  </code></pre>
  
  <p>I want to use app.py in my app_test files, and I write:</p>
  
  <pre><code>from bin.app import app
  </code></pre>
  
  <p>But it seems this doesn't work.</p>
  
  <p>How can I organize my files and import my own modules?</p>