title: AWS Elastic Beanstalk error - ImportError: No module named flask.ext.sqlalchemy
body: <p>I deployed my flask application into aws beanstalk and ran into an import error:</p>
  
  <pre><code>ImportError: No module named flask.ext.sqlalchemy
  </code></pre>
  
  <p>In my application.py file, I have this statement </p>
  
  <pre><code>from flask.ext.sqlalchemy import SQLAlchemy
  </code></pre>
  
  <p>and it runs fine on my machine but does not work in aws elastic beanstalk. </p>
  
  <p>Anyone ran into a similar issue?</p>