Object of type is not json serializable. Ошибка в python typeerror: object of type 'int' has no len(). typeerror: 'int' object is not iterable. typeerror: 'nonetype' object is not subscriptable.

Object of type is not json serializable. Ошибка в python typeerror: object of type 'int' has no len(). typeerror: 'int' object is not iterable. typeerror: 'nonetype' object is not subscriptable.
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