title: How to add a sub-app in django to INSTALLED_APPS?
body: <p>I have the structure of my project:</p>
  
  <pre><code>project
  ———— project
  ———— app
  ———————— subapp
      ———— manage.py
  </code></pre>
  
  <p>I added my sub-app to INSTALLED_APPS like that:</p>
  
  <pre class="lang-py prettyprint-override"><code>INSTALLED_APPS = ['app.apps.AppConfig', 'app.subapp.apps.SubapConfig']
  </code></pre>
  
  <p>But it doesn't works. Django gives me an error message:</p>
  
  <blockquote>
    <p>No module named 'news' and Cannot import 'news'. Check that
    'apps.subapp.apps.SubapConfig.name' is correct.</p>
  </blockquote>