title: Where do I import the `DoesNotExist` exception in Django 1.10 from?
body: <p>I'm having trouble figuring this out. I'm trying to catch an exception in the case of a specific object not existing, but the line</p>
  
  <pre><code>from django.core.exceptions import DoesNotExist
  </code></pre>
  
  <p>gives me the <code>cannot find reference in exeptions.py</code> warning. If the exception is not specified in that file, where do I find it?</p>