Sync typeshed #19446
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Sync typeshed #19446
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Source commit: python/typeshed@84e41f2
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)
… checking: python#13987 (comment) A manual cherry-pick of e437cdf.
Closed
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Diff from mypy_primer, showing the effect of this PR on open source code: pandas (https://github.com/pandas-dev/pandas)
- pandas/io/common.py:995: note: def open(cls, name: str | bytes | PathLike[str] | PathLike[bytes] | Buffer | None, mode: Literal['r|*', 'r|', 'r|gz', 'r|bz2', 'r|xz'], fileobj: _Fileobj | None = ..., bufsize: int = ..., *, format: int | None = ..., tarinfo: type[TarInfo] | None = ..., dereference: bool | None = ..., ignore_zeros: bool | None = ..., encoding: str | None = ..., errors: str = ..., pax_headers: Mapping[str, str] | None = ..., debug: int | None = ..., errorlevel: int | None = ...) -> TarFile
+ pandas/io/common.py:995: note: def open(cls, name: str | bytes | PathLike[str] | PathLike[bytes] | Buffer | None, mode: Literal['r|*', 'r|', 'r|gz', 'r|bz2', 'r|xz', 'r|zst'], fileobj: _Fileobj | None = ..., bufsize: int = ..., *, format: int | None = ..., tarinfo: type[TarInfo] | None = ..., dereference: bool | None = ..., ignore_zeros: bool | None = ..., encoding: str | None = ..., errors: str = ..., pax_headers: Mapping[str, str] | None = ..., debug: int | None = ..., errorlevel: int | None = ...) -> TarFile
- pandas/io/common.py:995: note: def open(cls, name: str | bytes | PathLike[str] | PathLike[bytes] | Buffer | None = ..., *, mode: Literal['r|*', 'r|', 'r|gz', 'r|bz2', 'r|xz'], fileobj: _Fileobj | None = ..., bufsize: int = ..., format: int | None = ..., tarinfo: type[TarInfo] | None = ..., dereference: bool | None = ..., ignore_zeros: bool | None = ..., encoding: str | None = ..., errors: str = ..., pax_headers: Mapping[str, str] | None = ..., debug: int | None = ..., errorlevel: int | None = ...) -> TarFile
+ pandas/io/common.py:995: note: def open(cls, name: str | bytes | PathLike[str] | PathLike[bytes] | Buffer | None = ..., *, mode: Literal['r|*', 'r|', 'r|gz', 'r|bz2', 'r|xz', 'r|zst'], fileobj: _Fileobj | None = ..., bufsize: int = ..., format: int | None = ..., tarinfo: type[TarInfo] | None = ..., dereference: bool | None = ..., ignore_zeros: bool | None = ..., encoding: str | None = ..., errors: str = ..., pax_headers: Mapping[str, str] | None = ..., debug: int | None = ..., errorlevel: int | None = ...) -> TarFile
- pandas/io/common.py:995: note: def open(cls, name: str | bytes | PathLike[str] | PathLike[bytes] | Buffer | None, mode: Literal['w|', 'w|xz'], fileobj: _Fileobj | None = ..., bufsize: int = ..., *, format: int | None = ..., tarinfo: type[TarInfo] | None = ..., dereference: bool | None = ..., ignore_zeros: bool | None = ..., encoding: str | None = ..., errors: str = ..., pax_headers: Mapping[str, str] | None = ..., debug: int | None = ..., errorlevel: int | None = ...) -> TarFile
+ pandas/io/common.py:995: note: def open(cls, name: str | bytes | PathLike[str] | PathLike[bytes] | Buffer | None, mode: Literal['w|', 'w|xz', 'w|zst'], fileobj: _Fileobj | None = ..., bufsize: int = ..., *, format: int | None = ..., tarinfo: type[TarInfo] | None = ..., dereference: bool | None = ..., ignore_zeros: bool | None = ..., encoding: str | None = ..., errors: str = ..., pax_headers: Mapping[str, str] | None = ..., debug: int | None = ..., errorlevel: int | None = ...) -> TarFile
- pandas/io/common.py:995: note: def open(cls, name: str | bytes | PathLike[str] | PathLike[bytes] | Buffer | None = ..., *, mode: Literal['w|', 'w|xz'], fileobj: _Fileobj | None = ..., bufsize: int = ..., format: int | None = ..., tarinfo: type[TarInfo] | None = ..., dereference: bool | None = ..., ignore_zeros: bool | None = ..., encoding: str | None = ..., errors: str = ..., pax_headers: Mapping[str, str] | None = ..., debug: int | None = ..., errorlevel: int | None = ...) -> TarFile
+ pandas/io/common.py:995: note: def open(cls, name: str | bytes | PathLike[str] | PathLike[bytes] | Buffer | None = ..., *, mode: Literal['w|', 'w|xz', 'w|zst'], fileobj: _Fileobj | None = ..., bufsize: int = ..., format: int | None = ..., tarinfo: type[TarInfo] | None = ..., dereference: bool | None = ..., ignore_zeros: bool | None = ..., encoding: str | None = ..., errors: str = ..., pax_headers: Mapping[str, str] | None = ..., debug: int | None = ..., errorlevel: int | None = ...) -> TarFile
steam.py (https://github.com/Gobot1234/steam.py)
+ steam/ext/commands/utils.py:43: note: def get(self, str, /, default: _VT) -> _VT
+ steam/ext/commands/utils.py:43: note: @overload
- steam/ext/commands/utils.py:43: note: def [_T] get(self, str, /, default: _VT | _T) -> _VT | _T
+ steam/ext/commands/utils.py:43: note: def [_T] get(self, str, /, default: _T) -> _VT | _T
django-stubs (https://github.com/typeddjango/django-stubs)
+ django-stubs/utils/datastructures.pyi:65: error: Unused "type: ignore" comment [unused-ignore]
spack (https://github.com/spack/spack)
+ lib/spack/spack/cmd/style.py:666: error: Incompatible types in assignment (expression has type "str | bytes | int | float | complex | EllipsisType | None", variable has type "str") [assignment]
pyodide (https://github.com/pyodide/pyodide)
+ pyodide-build/pyodide_build/xbuildenv_releases.py:220: note: def get(self, str, /, default: str) -> str
- pyodide-build/pyodide_build/xbuildenv_releases.py:220: note: def [_T] get(self, str, /, default: str | _T) -> str | _T
+ pyodide-build/pyodide_build/xbuildenv_releases.py:220: note: def [_T] get(self, str, /, default: _T) -> str | _T
ignite (https://github.com/pytorch/ignite)
+ ignite/handlers/visdom_logger.py:182: error: Redundant cast to "str" [redundant-cast]
operator (https://github.com/canonical/operator)
+ ops/model.py:1025: note: def get(self, str, /, default: Binding) -> Binding
+ ops/model.py:1025: note: @overload
- ops/model.py:1025: note: def [_T] get(self, str, /, default: Binding | _T) -> Binding | _T
+ ops/model.py:1025: note: def [_T] get(self, str, /, default: _T) -> Binding | _T
starlette (https://github.com/encode/starlette)
+ starlette/requests.py:137: error: Returning Any from function declared to return "dict[str, Any]" [no-any-return]
discord.py (https://github.com/Rapptz/discord.py)
- ...venv/lib/python3.13/site-packages/mypy/typeshed/stdlib/typing.pyi:1014: note: "update" of "TypedDict" defined here
+ ...venv/lib/python3.13/site-packages/mypy/typeshed/stdlib/typing.pyi:1015: note: "update" of "TypedDict" defined here
core (https://github.com/home-assistant/core)
+ homeassistant/components/transmission/coordinator.py:63: error: Returning Any from function declared to return "int" [no-any-return]
+ homeassistant/components/transmission/coordinator.py:68: error: Returning Any from function declared to return "str" [no-any-return]
+ homeassistant/components/islamic_prayer_times/coordinator.py:57: error: Returning Any from function declared to return "str" [no-any-return]
+ homeassistant/components/islamic_prayer_times/coordinator.py:71: error: Returning Any from function declared to return "str" [no-any-return]
+ homeassistant/components/islamic_prayer_times/coordinator.py:76: error: Returning Any from function declared to return "str" [no-any-return]
+ homeassistant/components/bthome/coordinator.py:48: error: Returning Any from function declared to return "bool" [no-any-return]
+ homeassistant/components/androidtv_remote/helpers.py:30: error: Returning Any from function declared to return "bool" [no-any-return]
+ homeassistant/components/xiaomi_ble/coordinator.py:70: error: Returning Any from function declared to return "bool" [no-any-return]
+ homeassistant/components/unifiprotect/data.py:96: error: Returning Any from function declared to return "bool" [no-any-return]
+ homeassistant/components/unifiprotect/data.py:101: error: Returning Any from function declared to return "int" [no-any-return]
+ homeassistant/components/shelly/utils.py:454: error: Returning Any from function declared to return "int" [no-any-return]
+ homeassistant/components/mikrotik/coordinator.py:86: error: Returning Any from function declared to return "bool" [no-any-return]
+ homeassistant/components/mikrotik/coordinator.py:91: error: Returning Any from function declared to return "bool" [no-any-return]
+ homeassistant/components/bthome/device_trigger.py:73: error: Returning Any from function declared to return "list[str]" [no-any-return]
+ homeassistant/components/squeezebox/media_player.py:290: error: Returning Any from function declared to return "int" [no-any-return]
+ homeassistant/components/shelly/coordinator.py:166: error: Returning Any from function declared to return "int" [no-any-return]
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Mypy primer hits |
hauntsaninja
approved these changes
Jul 16, 2025
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Thank you! |
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Source commit:
python/typeshed@84e41f2