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Object of type is not json serializable

Object of type is not json serializableObject of type is not json serializableObject of type is not json serializableObject of type is not json serializableObject of type is not json serializableObject of type is not json serializableObject of type is not json serializableObject of type is not json serializableObject of type is not json serializableObject of type is not json serializableObject of type is not json serializableObject of type is not json serializableObject of type is not json serializableObject of type is not json serializableObject of type is not json serializableObject of type is not json serializableObject of type is not json serializableObject of type is not json serializableObject of type is not json serializableObject of type is not json serializableObject of type is not json serializableObject of type is not json serializableObject of type is not json serializable