new_contents: from optparse import make_option
  from datetime import datetime, timedelta
  
  from django.core.management.base import BaseCommand, CommandError
  from django.db.models import Count
  
  from pybb.models import Topic
  
  class Command(BaseCommand):
      help = 'Resave all posts.'
  
      def handle(self, *args, **kwargs):
          check_time = datetime.now() - timedelta(seconds=10)
          topics = Topic.objects.filter(created__lt=check_time)\
                        .annotate(counter=Count('posts'))\
                        .filter(counter=0)
  
          count = topics.count()
          print 'Found %d invalid topics' % count
          if count:
              answer = raw_input('Are you sure you want delete them? [y/n]:')
              if answer.lower() == 'y':
                  print 'Deleting topics'
                  topics.delete()
                  print 'Deletion completed'
              else:
                  print 'Aborting'
  
subject: Add management command to delete invalid topics