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Sync typeshed

Source commit:
python/typeshed@b0ed50e

Note that you will need to close and re-open the PR in order to trigger CI.

mypybot and others added 5 commits April 15, 2023 00:04
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)
Since the plugin provides superior type checking:
#13987 (comment)
@AlexWaygood AlexWaygood reopened this Apr 15, 2023
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Diff from mypy_primer, showing the effect of this PR on open source code:

werkzeug (https://github.com/pallets/werkzeug)
+ src/werkzeug/routing/map.py:790: error: Unused "type: ignore[type-var]" comment
+ src/werkzeug/routing/map.py:791: error: Argument 1 to "urlunsplit" has incompatible type "Tuple[str, str, str, Union[Mapping[str, Any], str, None], None]"; expected "Iterable[None]"  [arg-type]

bandersnatch (https://github.com/pypa/bandersnatch)
+ src/bandersnatch_storage_plugins/swift.py: note: In member "symlink_to" of class "SwiftPath":
+ src/bandersnatch_storage_plugins/swift.py:415: error: Signature of "symlink_to" incompatible with supertype "Path"  [override]
+ src/bandersnatch_storage_plugins/swift.py:415: note:      Superclass:
+ src/bandersnatch_storage_plugins/swift.py:415: note:          def symlink_to(self, target: Union[str, bytes, PathLike[str], PathLike[bytes]], target_is_directory: bool = ...) -> None
+ src/bandersnatch_storage_plugins/swift.py:415: note:      Subclass:
+ src/bandersnatch_storage_plugins/swift.py:415: note:          def symlink_to(self, src: Union[Path, str], target_is_directory: bool = ..., src_container: Optional[str] = ..., src_account: Optional[str] = ...) -> None

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Looks like python/typeshed#9991 and python/typeshed#10019

@hauntsaninja hauntsaninja merged commit 69c774e into master Apr 15, 2023
@hauntsaninja hauntsaninja deleted the mypybot/sync-typeshed branch April 15, 2023 20:37
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3 participants