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| author | Gregory Beauregard <greg@greg.red> | 2022-06-25 06:35:33 (GMT) |
|---|---|---|
| committer | GitHub <noreply@github.com> | 2022-06-25 06:35:33 (GMT) |
| commit | 81e91c95a51daaa77efa3a3758ecba0475cfef38 (patch) | |
| tree | 88fe3a23f998737f846ec9c4d2d9a8701510cfd8 /Misc/NEWS.d/next/Library/2022-02-05-18-46-54.bpo-46642.YI6nHQ.rst | |
| parent | 605e9c66ad367b54a847f9fc65447a071742f554 (diff) | |
| download | cpython-81e91c95a51daaa77efa3a3758ecba0475cfef38.zip cpython-81e91c95a51daaa77efa3a3758ecba0475cfef38.tar.gz cpython-81e91c95a51daaa77efa3a3758ecba0475cfef38.tar.bz2 | |
bpo-46642: Explicitly disallow subclassing of instaces of TypeVar, ParamSpec, etc (GH-31148)
The existing test covering this case passed only incidentally. We
explicitly disallow doing this and add a proper error message.
Co-authored-by: Serhiy Storchaka <storchaka@gmail.com>
Diffstat (limited to 'Misc/NEWS.d/next/Library/2022-02-05-18-46-54.bpo-46642.YI6nHQ.rst')
| -rw-r--r-- | Misc/NEWS.d/next/Library/2022-02-05-18-46-54.bpo-46642.YI6nHQ.rst | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/Misc/NEWS.d/next/Library/2022-02-05-18-46-54.bpo-46642.YI6nHQ.rst b/Misc/NEWS.d/next/Library/2022-02-05-18-46-54.bpo-46642.YI6nHQ.rst new file mode 100644 index 0000000..2d2815c --- /dev/null +++ b/Misc/NEWS.d/next/Library/2022-02-05-18-46-54.bpo-46642.YI6nHQ.rst @@ -0,0 +1 @@ +Improve error message when trying to subclass an instance of :data:`typing.TypeVar`, :data:`typing.ParamSpec`, :data:`typing.TypeVarTuple`, etc. Based on patch by Gregory Beauregard. |