I just released: https://pypi.org/project/typing-extensions/4.7.0rc1/ This is the first time we are using a release candidate for typing-extensions. After the last feature release broke some projects, several users suggested using release candidates as a means to detect such breakages before a full release. Please try out the release candidate on your projects and let us know (by opening an issue https://github.com/python/typing_extensions/issues/new) if you encounter any problems. If there are no major issues, I expect to release 4.7.0 final one week from today, on June 28. We also started running the test suites of some prominent third-party projects against the main branch of typing-extensions (thanks to Alex Waygood), which already helped us find several problems. As of this release, typing-extensions will re-export all non-deprecated names in the typing module so that users don't have to remember whether to import some particular name from typing or typing-extensions. In addition, the release adds new introspection helpers get_protocol_members() and is_protocol(), officially declares support for Python 3.12, and makes many tweaks and bug fixes related to Protocol and TypedDict. Full changelog: - Add `typing_extensions.get_protocol_members` and `typing_extensions.is_protocol` (backport of CPython PR #104878). Patch by Jelle Zijlstra. - `typing_extensions` now re-exports all names in the standard library's `typing` module, except the deprecated `ByteString`. Patch by Jelle Zijlstra. - Due to changes in the implementation of `typing_extensions.Protocol`, `typing.runtime_checkable` can now be used on `typing_extensions.Protocol` (previously, users had to use `typing_extensions.runtime_checkable` if they were using `typing_extensions.Protocol`). - Align the implementation of `TypedDict` with the implementation in the standard library on Python 3.9 and higher. `typing_extensions.TypedDict` is now a function instead of a class. The private functions `_check_fails`, `_dict_new`, and `_typeddict_new` have been removed. `is_typeddict` now returns `False` when called with `TypedDict` itself as the argument. Patch by Jelle Zijlstra. - Declare support for Python 3.12. Patch by Jelle Zijlstra. - Fix tests on Python 3.13, which removes support for creating `TypedDict` classes through the keyword-argument syntax. Patch by Jelle Zijlstra. - Fix a regression introduced in v4.6.3 that meant that ``issubclass(object, typing_extensions.Protocol)`` would erroneously raise ``TypeError``. Patch by Alex Waygood (backporting the CPython PR https://github.com/python/cpython/pull/105239). - Allow `Protocol` classes to inherit from `typing_extensions.Buffer` or `collections.abc.Buffer`. Patch by Alex Waygood (backporting https://github.com/python/cpython/pull/104827, by Jelle Zijlstra). - Allow classes to inherit from both `typing.Protocol` and `typing_extensions.Protocol` simultaneously. Since v4.6.0, this caused `TypeError` to be raised due to a metaclass conflict. Patch by Alex Waygood. - Backport several deprecations from CPython relating to unusual ways to create `TypedDict`s and `NamedTuple`s. CPython PRs #105609 and #105780 by Alex Waygood; `typing_extensions` backport by Jelle Zijlstra. - Creating a `NamedTuple` using the functional syntax with keyword arguments (`NT = NamedTuple("NT", a=int)`) is now deprecated. - Creating a `NamedTuple` with zero fields using the syntax `NT = NamedTuple("NT")` or `NT = NamedTuple("NT", None)` is now deprecated. - Creating a `TypedDict` with zero fields using the syntax `TD = TypedDict("TD")` or `TD = TypedDict("TD", None)` is now deprecated. - Fix bug on Python 3.7 where a protocol `X` that had a member `a` would not be considered an implicit subclass of an unrelated protocol `Y` that only has a member `a`. Where the members of `X` are a superset of the members of `Y`, `X` should always be considered a subclass of `Y` iff `Y` is a runtime-checkable protocol that only has callable members. Patch by Alex Waygood (backporting CPython PR https://github.com/python/cpython/pull/105835).