AttributeError:module'collections'hasnoattribute'MutableMapping'这是什么原因？DeprecationWarning:UsingorimportingtheABCsfrom'collectionsinsteadoffrom'collections.abc'isdeprecatedsincePython3.3,andin3.10itwillstopworking也就是说，fromcollectionsimportMapping,MutableMapping这种用法是在python3.10它已被删除。从python3.3开始，应该使用fromcollections.abcimportMutableMapping而不是fromcollectionsimportMapping,MutableMapping在python3.10上，fromcollectionsimportMapping,MutableMapping的用法被完全移除
