title: Error when importing modules from different folders in Python
body: <p>I have the following:</p>
  <pre><code>my_project/
      hybrik/
          __init__.py
          models/
              __init__.py
              builder.py
      scripts/
          demo.py
  </code></pre>
  <p>And in demo.py:</p>
  <pre class="lang-py prettyprint-override"><code>from hybrik.models import builder
  </code></pre>
  <p>When I tried to run demo.py, an error occured:</p>
  <pre><code>ModuleNotFoundError: No module named 'hybrik'
  </code></pre>
  <p>I've already had <code>__init__.py</code>, why can't it find the module?</p>