diff options
| author | Ken Jin <28750310+Fidget-Spinner@users.noreply.github.com> | 2021-04-28 15:38:14 (GMT) |
|---|---|---|
| committer | GitHub <noreply@github.com> | 2021-04-28 15:38:14 (GMT) |
| commit | 859577c24981d6b36960d309f99f7fc810fe75c2 (patch) | |
| tree | 172b56f0aec20bc47c0fe0d39e44e6e040d0e63d /Misc | |
| parent | c1a9535989cc7323099725503519a17f79d083f5 (diff) | |
| download | cpython-859577c24981d6b36960d309f99f7fc810fe75c2.zip cpython-859577c24981d6b36960d309f99f7fc810fe75c2.tar.gz cpython-859577c24981d6b36960d309f99f7fc810fe75c2.tar.bz2 | |
bpo-41559: Change PEP 612 implementation to pure Python (#25449)
Diffstat (limited to 'Misc')
| -rw-r--r-- | Misc/NEWS.d/next/Library/2021-04-17-10-49-57.bpo-41559.caIwt9.rst | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/Misc/NEWS.d/next/Library/2021-04-17-10-49-57.bpo-41559.caIwt9.rst b/Misc/NEWS.d/next/Library/2021-04-17-10-49-57.bpo-41559.caIwt9.rst new file mode 100644 index 0000000..11db423 --- /dev/null +++ b/Misc/NEWS.d/next/Library/2021-04-17-10-49-57.bpo-41559.caIwt9.rst @@ -0,0 +1,6 @@ +:pep:`612` is now implemented purely in Python; builtin ``types.GenericAlias`` +objects no longer include ``typing.ParamSpec`` in ``__parameters__`` +(with the exception of ``collections.abc.Callable``\ 's ``GenericAlias``). +This means previously invalid uses of ``ParamSpec`` (such as +``list[P]``) which worked in earlier versions of Python 3.10 alpha, +will now raise ``TypeError`` during substitution. |