expanding on https://bugs.python.org/issue36983 the docs are also a bit out of date in places I'm not sure how to document something that appeared in two versions, but I'll leave that part to review. Using data generated / collected in https://github.com/asottile/flake8-typing-imports via this script: https://github.com/asottile/flake8-typing-imports/blob/master/bin/build-generated and then analyzed with this script: from flake8_typing_imports import SYMBOLS ALL = set().union(*(v for _, v in SYMBOLS)) for k in sorted(ALL): state = False for i, (v, ks) in enumerate(SYMBOLS): if state is False and k in ks: print(f'{k}: new in {v}') state = True elif state is True and k not in ks: print(f'=> {k}: removed in {v}') state = False I've found the following: $ python3 t.py | grep -v 'new in 3\.5\.0' AsyncContextManager: new in 3.5.4 => AsyncContextManager: removed in 3.6.0 AsyncContextManager: new in 3.6.2 AsyncGenerator: new in 3.6.1 AsyncIterable: new in 3.5.2 AsyncIterator: new in 3.5.2 Awaitable: new in 3.5.2 ChainMap: new in 3.5.4 => ChainMap: removed in 3.6.0 ChainMap: new in 3.6.1 ClassVar: new in 3.5.3 Collection: new in 3.6.0 ContextManager: new in 3.5.4 Coroutine: new in 3.5.3 Counter: new in 3.5.4 => Counter: removed in 3.6.0 Counter: new in 3.6.1 DefaultDict: new in 3.5.2 Deque: new in 3.5.4 => Deque: removed in 3.6.0 Deque: new in 3.6.1 ForwardRef: new in 3.7.0 GenericMeta: new in 3.5.4 => GenericMeta: removed in 3.6.0 GenericMeta: new in 3.6.1 => GenericMeta: removed in 3.7.0 NewType: new in 3.5.2 NoReturn: new in 3.5.4 => NoReturn: removed in 3.6.0 NoReturn: new in 3.6.2 OrderedDict: new in 3.7.2 TYPE_CHECKING: new in 3.5.2 Text: new in 3.5.2 Type: new in 3.5.2