title: Django: How to 'scrub' list of users
body: <p>This is my code that fails:</p>
  
  <pre><code>dashboard = Dashboard.objects.get(slug=slug)
  users = User.objects.all() # list of users
  
  for editor in dashboard.dashboardeditor_set.iterator:
      users.remove(editor.user)
  </code></pre>
  
  <p>The error:
  'instancemethod' object is not iterable</p>
  
  <p>From models.py:</p>
  
  <pre><code>class DashboardEditor(models.Model):
      dashboard = models.ForeignKey(Dashboard)
      user = models.ForeignKey(User)
  </code></pre>
  
  <p>Can anybody help me figure out how to scrub editors from the list of all users?</p>
  
  <p>Thanks! :)</p>