title: Heroku Error: No module named 'urllib2'
body: <p>I need some help. I'm new to Heroku and I'm getting log errors telling me...</p>
  
  <pre><code>"ModuleNotFoundError: No module named 'urllib2' 
  </code></pre>
  
  <p>I thought <code>urllib2</code> package was part of Python? </p>
  
  <p>Any ideas on how to fix this? My app uses <code>urllib2</code> extensively.</p>