new_contents: from optparse import make_option
  import sys
  from django.core.management.base import BaseCommand
  from challenge.models import Challenge, ChallengeSet
  
  class Command(BaseCommand):
      args = ""
      help = "Update concept total_question counts (post db import)"
      
      def handle(self, *args, **options):
          for challengeset in ChallengeSet.objects.filter(challenge=0):
              challenges = Challenge.objects.all()
              
              for concept in challengeset.concepts.all():
                  challenges = challenges.filter(concepts=concept)
                  
              if challenges:
                  challengeset.challenge = challenges[0]
                  challengeset.save()
  
subject: Add management function for challengeset migration