  
      setattr(api_settings, setting, original_value)
  
      if module is not None:
          reload(module)
 
</s> remove         reload(module)
 </s> add         six.moves.reload_module(module)
        six.moves.reload_module(module)
  
      setattr(api_settings, setting, original_value)
  
      if module is not None:
        six.moves.reload_module(module)
keep keep keep keep replace
 Use six to reload module 
rest_framework/tests/utils.py