title: 'ImportError: No module named decorator' in google app engine
body: <p>I have added a validators library to my google app engine by manually adding the code to a folder <code>lib/validators</code>. Then in my code I added this line</p>
  
  <pre><code>from validators.utils import ValidationFailure
  </code></pre>
  
  <p>When I run my app I got an exception from this line:</p>
  
  <pre><code>    from validators.utils import ValidationFailure
    File "lib/validators/__init__.py", line 1, in &lt;module&gt;
      from .between import between
    File "lib/validators/between.py", line 2, in &lt;module&gt;
      from .utils import validator
    File "lib/validators/utils.py", line 5, in &lt;module&gt;
      from decorator import decorator
  ImportError: No module named decorator
  </code></pre>
  
  <p>If I run <code>from decorator import decorator</code> in the python intrepretor, it works as expected.</p>
  
  <p>However when I tried it in the 'interactive console' in the local development server, I got the same error</p>
  
  <p><a href="https://i.stack.imgur.com/ovMKi.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/ovMKi.png" alt="enter image description here"></a></p>
  
  <p>How can I resolve this exception?</p>