code: def mock_django_setup(settings_module, disabled_features=None):
      
      if apps.ready:
          # We're running in a real Django unit test, don't do anything.
          return
  
      if 'DJANGO_SETTINGS_MODULE' not in os.environ:
          os.environ['DJANGO_SETTINGS_MODULE'] = settings_module
      django.setup()
      mock_django_connection(disabled_features)
docs: Must be called *AT IMPORT TIME* to pretend that Django is set up.
  
      This is useful for running tests without using the Django test runner.
      This must be called before any Django models are imported, or they will
      complain. Call this from a module in the calling project at import time,
      then be sure to import that module at the start of all mock test modules.
      Another option is to call it from the test package's init file, so it runs
      before all the test modules are imported.
      :param settings_module: the module name of the Django settings file,
          like 'myapp.settings'
      :param disabled_features: a list of strings that should be marked as
          *False* on the connection features list. All others will default
          to True.