DynamoDB > Enums > ReturnValuesOnConditionCheckFailure ReturnValuesOnConditionCheckFailure¶ Enum Class¶ ReturnValuesOnConditionCheckFailure ¶ Bases: UnknownEnumMixin, StrEnum Attributes¶ ALL_OLD class-attribute instance-attribute ¶ ALL_OLD = 'ALL_OLD' NONE class-attribute instance-attribute ¶ NONE = 'NONE'