tagging_distincter.py

from opal.models import Tagging, Episode
from django.db.models import Count

dupes = Tagging.objects.values('value', 'episode', 'user').annotate(Count('id')).order_by().filter(id__count__gt=1)

# handle non mine
for dupe in dupes:
  episode = Episode.objects.get(id=dupe["episode"])
  print "episode {}".format(episode)
  tags = episode.tagging_set.filter(value=dupe["value"], user=dupe["user"])
  tags = tags.exclude(id=tags.last().id)
  tags.delete()