new_contents: #!/usr/bin/env python
  # -*- coding: utf-8 -*-
  from django.db import models
  
  
  def model_choices():
      try:
          return tuple(sorted([
              (u"{0}.{1}".format(app._meta.app_label, app._meta.object_name),
               u"{0} - {1}".format(app._meta.app_label, app._meta.object_name))
              for app in models.get_models() if 'opps.' in app.__module__]))
      except ImportError:
          return tuple([])
  
subject: Create core forms, add model_choices