显示报错ValueError: Circular reference detected

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C:\Users\Administrator\venv\Scripts\python.exe E:/慕课网/gift/admin.py

Traceback (most recent call last):

  File "E:/慕课网/gift/admin.py", line 96, in <module>

    admin.update_user_active(username="小慕")

  File "E:/慕课网/gift/admin.py", line 55, in update_user_active

    self._Base__change_active(username=username)

  File "E:\慕课网\gift\base.py", line 174, in __change_active

    self.__save(users, self.user_json)

  File "E:\慕课网\gift\base.py", line 311, in __save

    data = json.dumps(data)  # data无法转换为字符串类型

  File "E:\Anaconda\Anaconda3\lib\json\__init__.py", line 231, in dumps

    return _default_encoder.encode(obj)

  File "E:\Anaconda\Anaconda3\lib\json\encoder.py", line 199, in encode

    chunks = self.iterencode(o, _one_shot=True)

  File "E:\Anaconda\Anaconda3\lib\json\encoder.py", line 257, in iterencode

    return _iterencode(o, 0)

ValueError: Circular reference detected

1

2

3 {'dewei': {'username': 'dewei', 'role': 'admin', 'active': True, 'create_time': '2020-08-22 17:34:57', 'update_time': '2020-08-22 17:34:57', 'gift': []}, '小慕': {'username': '小慕', 'role': 'normal', 'active': True, 'create_time': '2020-08-22 17:37:37', 'update_time': '2020-08-23 18:47:22', 'gift': [], '小慕': {...}}}

4 {'dewei': {'username': 'dewei', 'role': 'admin', 'active': True, 'create_time': '2020-08-22 17:34:57', 'update_time': '2020-08-22 17:34:57', 'gift': []}, '小慕': {'username': '小慕', 'role': 'normal', 'active': True, 'create_time': '2020-08-22 17:37:37', 'update_time': '2020-08-23 18:47:22', 'gift': [], '小慕': {...}}} <class 'dict'>

Process finished with exit code 1