title: try/except in list comprehension
body: <p>Is it possible to convert the following into a list comprehension?</p>
  
  <pre><code>cleaned_list = []
  for item in dirtry_list:
      try:
          item.video
      except Video.DoesNotExist:
          pass
      else:
          cleaned_list.append(item)
  </code></pre>