title: Multiple inheritance with Django
body: <p>I'm using Django for a project, and I want to use a couple of apps that extend the admin by subclassing the admin class.</p>
  
  <p>How can I have them both sublass the admin class?</p>
  
  <pre><code>from django.contrib import admin
  from testing.models import *
  from reversion.admin import VersionAdmin
  from moderation.admin import ModerationAdmin
  
  class ItemAdmin(VersionAdmin):
      pass
  
  admin.site.register(Item, ItemAdmin)
  </code></pre>