This release focuses on compatibility with the upcoming release of
Python 3.13. Most changes are related to the implementation of type
parameter defaults (PEP 696).
Thanks to all of the people who contributed patches, especially Alex
Waygood, who did most of the work adapting typing-extensions to the
CPython PEP 696 implementation.
There is a single change since 4.12.0rc1:
Fix incorrect behaviour of typing_extensions.ParamSpec on Python 3.8 and
3.9 that meant that
isinstance(typing_extensions.ParamSpec("P"), typing.TypeVar) would have a
different result in some situations depending on whether or not a profiling
function had been set using sys.setprofile. Patch by Alex Waygood.
Changes included in 4.12.0rc1:
Improve the implementation of type parameter defaults (PEP 696)
Backport the typing.NoDefault sentinel object from Python 3.13.
TypeVars, ParamSpecs and TypeVarTuples without default values now have
their __default__ attribute set to this sentinel value.
TypeVars, ParamSpecs and TypeVarTuples now have a has_default()
method, matching typing.TypeVar, typing.ParamSpec and
typing.TypeVarTuple on Python 3.13+.
TypeVars, ParamSpecs and TypeVarTuples with default=None passed to
their constructors now have their __default__ attribute set to None
at runtime rather than types.NoneType.
Fix most tests for TypeVar, ParamSpec and TypeVarTuple on Python
3.13.0b1 and newer.
Backport CPython PR #118774,
allowing type parameters without default values to follow those with
default values in some type parameter lists. Patch by Alex Waygood,
backporting a CPython PR by Jelle Zijlstra.
It is now disallowed to use a TypeVar with a default value after a
TypeVarTuple in a type parameter list. This matches the CPython
implementation of PEP 696 on Python 3.13+.
Fix bug in PEP-696 implementation where a default value for a ParamSpec
would be cast to a tuple if a list was provided.
Patch by Alex Waygood.
Fix Protocol tests on Python 3.13.0a6 and newer. 3.13.0a6 adds a new
__static_attributes__ attribute to all classes in Python,
which broke some assumptions made by the implementation of
typing_extensions.Protocol. Similarly, 3.13.0b1 adds the new
__firstlineno__ attribute to all classes.
Fix AttributeError when using typing_extensions.runtime_checkable
in combination with typing.Protocol on Python 3.12.2 or newer.
Patch by Alex Waygood.
At runtime, assert_never now includes the repr of the argument
This release is mostly the same as 4.12.0rc1 but fixes one more
longstanding bug.
Fix incorrect behaviour of typing_extensions.ParamSpec on Python 3.8 and
3.9 that meant that
isinstance(typing_extensions.ParamSpec("P"), typing.TypeVar) would have a
different result in some situations depending on whether or not a profiling
function had been set using sys.setprofile. Patch by Alex Waygood.
Release 4.12.0rc1 (May 16, 2024)
This release focuses on compatibility with the upcoming release of
Python 3.13. Most changes are related to the implementation of type
parameter defaults (PEP 696).
Thanks to all of the people who contributed patches, especially Alex
Waygood, who did most of the work adapting typing-extensions to the
CPython PEP 696 implementation.
Full changelog:
Improve the implementation of type parameter defaults (PEP 696)
Backport the typing.NoDefault sentinel object from Python 3.13.
TypeVars, ParamSpecs and TypeVarTuples without default values now have
their __default__ attribute set to this sentinel value.
TypeVars, ParamSpecs and TypeVarTuples now have a has_default()
method, matching typing.TypeVar, typing.ParamSpec and
typing.TypeVarTuple on Python 3.13+.
TypeVars, ParamSpecs and TypeVarTuples with default=None passed to
their constructors now have their __default__ attribute set to None
at runtime rather than types.NoneType.
Fix most tests for TypeVar, ParamSpec and TypeVarTuple on Python
3.13.0b1 and newer.
Backport CPython PR #118774,
allowing type parameters without default values to follow those with
default values in some type parameter lists. Patch by Alex Waygood,
backporting a CPython PR by Jelle Zijlstra.
It is now disallowed to use a TypeVar with a default value after a
TypeVarTuple in a type parameter list. This matches the CPython
implementation of PEP 696 on Python 3.13+.
Fix bug in PEP-696 implementation where a default value for a ParamSpec
would be cast to a tuple if a list was provided.
Patch by Alex Waygood.
Fix Protocol tests on Python 3.13.0a6 and newer. 3.13.0a6 adds a new
__static_attributes__ attribute to all classes in Python,
which broke some assumptions made by the implementation of
typing_extensions.Protocol. Similarly, 3.13.0b1 adds the new
__firstlineno__ attribute to all classes.
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Bumps typing-extensions from 4.9.0 to 4.12.0.
Release notes
Sourced from typing-extensions's releases.
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Changelog
Sourced from typing-extensions's changelog.
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Commits
f90a8dc
Prepare release 4.12.0 (#408)118e1a6
Make sureisinstance(typing_extensions.ParamSpec("P"), typing.TypeVar)
is u...910141a
Add security documentation (#403)0dbc7c9
Prepare release 4.12.0rc1 (#402)1da5d3d
Update actions/setup-python (#401)72298f0
4.12.0a2 (#400)465ba78
Fix publish workflow (#399)21fde1f
Prepare releaes 4.12.0a1 (#398)63d8277
Add workflow for Trusted Publishing (#395)074d053
Backport PEP-696 specialisation on Python >=3.11.1 (#397)Dependabot will resolve any conflicts with this PR as long as you don't alter it yourself. You can also trigger a rebase manually by commenting
@dependabot rebase
.Dependabot commands and options
You can trigger Dependabot actions by commenting on this PR: - `@dependabot rebase` will rebase this PR - `@dependabot recreate` will recreate this PR, overwriting any edits that have been made to it - `@dependabot merge` will merge this PR after your CI passes on it - `@dependabot squash and merge` will squash and merge this PR after your CI passes on it - `@dependabot cancel merge` will cancel a previously requested merge and block automerging - `@dependabot reopen` will reopen this PR if it is closed - `@dependabot close` will close this PR and stop Dependabot recreating it. You can achieve the same result by closing it manually - `@dependabot show