title: ModuleNotFoundError: No module named 'app' How to fix it?
body: <p>The structure of my project is:</p>
  <p><a href="https://i.stack.imgur.com/78cbW.png" rel="nofollow noreferrer">directories</a></p>
  <p>From test.py I am trying to import models using <em>from app.models import User</em>, but I am getting an error indicating the app module wasn't found.
  Also, tried <em>from .models import User</em></p>
  <p>Anyone can help me understand what I am missing?</p>