title: django modeladmin list_display
body: <p>I'm trying to play with the Django's official tutorial. Specifically the modeladmin list_display:</p>
  
  <p><a href="http://docs.djangoproject.com/en/1.2/intro/tutorial02/#customize-the-admin-change-list" rel="nofollow noreferrer">http://docs.djangoproject.com/en/1.2/intro/tutorial02/#customize-the-admin-change-list</a></p>
  
  <p>How can I add a column that displays the number of choices for each poll in the list?</p>
  
  <p>Thanks!</p>