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| author | Ken Jin <28750310+Fidget-Spinner@users.noreply.github.com> | 2021-05-13 05:24:35 (GMT) |
|---|---|---|
| committer | GitHub <noreply@github.com> | 2021-05-13 05:24:35 (GMT) |
| commit | b2f3f8e3d81b0bb0ba18f563d82c28ba133c0790 (patch) | |
| tree | 53a693312609230211261241053263ac3e5fefcc /Misc | |
| parent | 7565586724692e2ad164d770af9675f7a261fe3a (diff) | |
| download | cpython-b2f3f8e3d81b0bb0ba18f563d82c28ba133c0790.zip cpython-b2f3f8e3d81b0bb0ba18f563d82c28ba133c0790.tar.gz cpython-b2f3f8e3d81b0bb0ba18f563d82c28ba133c0790.tar.bz2 | |
bpo-44098: Drop ParamSpec from most ``__parameters__`` in typing generics (GH-26013)
Added two new attributes to ``_GenericAlias``:
* ``_typevar_types``, a single type or tuple of types indicating what types are treated as a ``TypeVar``. Used for ``isinstance`` checks.
* ``_paramspec_tvars ``, a boolean flag which guards special behavior for dealing with ``ParamSpec``. Setting it to ``True`` means this class deals with ``ParamSpec``.
Automerge-Triggered-By: GH:gvanrossum
Diffstat (limited to 'Misc')
| -rw-r--r-- | Misc/NEWS.d/next/Library/2021-05-10-17-45-00.bpo-44098._MoxuZ.rst | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/Misc/NEWS.d/next/Library/2021-05-10-17-45-00.bpo-44098._MoxuZ.rst b/Misc/NEWS.d/next/Library/2021-05-10-17-45-00.bpo-44098._MoxuZ.rst new file mode 100644 index 0000000..2aaa8b6 --- /dev/null +++ b/Misc/NEWS.d/next/Library/2021-05-10-17-45-00.bpo-44098._MoxuZ.rst @@ -0,0 +1,5 @@ +``typing.ParamSpec`` will no longer be found in the ``__parameters__`` of +most :mod:`typing` generics except in valid use locations specified by +:pep:`612`. This prevents incorrect usage like ``typing.List[P][int]``. This +change means incorrect usage which may have passed silently in 3.10 beta 1 +and earlier will now error. |