Sync typeshed - #21799
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Source commit: python/typeshed@7ee1807
This is allegedly causing large performance problems, see 13821 typeshed/8231 had zero hits on mypy_primer, so it's not the worst thing to undo. Patching this in typeshed also feels weird, since there's a more general soundness issue. If a typevar has a bound or constraint, we might not want to solve it to a Literal. If we can confirm the performance regression or fix the unsoundness within mypy, I might pursue upstreaming this in typeshed. (Reminder: add this to the sync_typeshed script once merged)
The plugin provides superior type checking: python#13987 (comment) A manual cherry-pick of e437cdf.
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Diff from mypy_primer, showing the effect of this PR on open source code: aiohttp (https://github.com/aio-libs/aiohttp)
- aiohttp/worker.py:253:9: error: function asyncio.events.set_event_loop_policy is deprecated: Deprecated since Python 3.14; will be removed in Python 3.16. [deprecated]
+ aiohttp/worker.py:253:9: error: function asyncio.events.set_event_loop_policy is deprecated: Deprecated; will be removed in Python 3.16. [deprecated]
comtypes (https://github.com/enthought/comtypes)
- comtypes/server/register.py:226: error: Incompatible types in assignment (expression has type "Iterator[tuple[int, str]]", variable has type "list[tuple[int, str]]") [assignment]
+ comtypes/server/register.py:226: error: Incompatible types in assignment (expression has type "reversed[tuple[int, str]]", variable has type "list[tuple[int, str]]") [assignment]
discord.py (https://github.com/Rapptz/discord.py)
- discord/abc.py:1815: error: Incompatible types in assignment (expression has type "Iterator[MessagePin]", variable has type "list[MessagePin]") [assignment]
+ discord/abc.py:1815: error: Incompatible types in assignment (expression has type "reversed[MessagePin]", variable has type "list[MessagePin]") [assignment]
pytest (https://github.com/pytest-dev/pytest)
+ src/_pytest/monkeypatch.py:417: error: Unused "type: ignore" comment [unused-ignore]
+ src/_pytest/monkeypatch.py:422: error: Unused "type: ignore" comment [unused-ignore]
jinja (https://github.com/pallets/jinja)
+ src/jinja2/utils.py:570: error: Returning Any from function declared to return "Iterator[Any]" [no-any-return]
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Mypy primer hits
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Source commit:
python/typeshed@7ee1807