関連ワード:  python name class is not defined    nameerror name class is not defined    python name type is not defined    python name error class is not defined    python nameerror name class is not defined    nameerror name type is not defined    python class name self is not defined    nameerror name 'num_classes' is not defined    nameerror name permission_classes is not defined    nameerror name 'authentication_classes' is not defined