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Add SupportsRichComparison type to _typeshed (#6583)

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Use it to improve types of `max()` and other functions.

Also make some other tweaks to types related to comparison dunders.

Fixes #6575
This commit is contained in:
Alex Waygood
2021-12-14 14:12:23 +00:00
committed by GitHub
parent 968fd6d01d
commit 5670ca2f75
9 changed files with 73 additions and 69 deletions
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22
stdlib/_typeshed/__init__.pyi
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@@ -35,15 +35,25 @@ class SupportsNext(Protocol[_T_co]):
class SupportsAnext(Protocol[_T_co]):
def __anext__(self) -> Awaitable[_T_co]: ...
class SupportsLessThan(Protocol):
def __lt__(self, __other: Any) -> bool: ...
# Comparison protocols
SupportsLessThanT = TypeVar("SupportsLessThanT", bound=SupportsLessThan) # noqa: Y001
class SupportsDunderLT(Protocol):
def __lt__(self, __other: Any) -> Any: ...
class SupportsGreaterThan(Protocol):
def __gt__(self, __other: Any) -> bool: ...
class SupportsDunderGT(Protocol):
def __gt__(self, __other: Any) -> Any: ...
SupportsGreaterThanT = TypeVar("SupportsGreaterThanT", bound=SupportsGreaterThan) # noqa: Y001
class SupportsDunderLE(Protocol):
def __le__(self, __other: Any) -> Any: ...
class SupportsDunderGE(Protocol):
def __ge__(self, __other: Any) -> Any: ...
class SupportsAllComparisons(SupportsDunderLT, SupportsDunderGT, SupportsDunderLE, SupportsDunderGE, Protocol): ...
SupportsRichComparison = Union[SupportsDunderLT, SupportsDunderGT]
SupportsRichComparisonT = TypeVar("SupportsRichComparisonT", bound=SupportsRichComparison) # noqa: Y001
SupportsAnyComparison = Union[SupportsDunderLE, SupportsDunderGE, SupportsDunderGT, SupportsDunderLT]
class SupportsDivMod(Protocol[_T_contra, _T_co]):
def __divmod__(self, __other: _T_contra) -> _T_co: ...