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Add reflected set operators to AbstractSet #16328

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Add reflected set operators to AbstractSet #16328

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fc46afc
Add reflected set operators to AbstractSet
afonsojanu Aug 31, 2026
2dde9dd
Silence downstream override mismatches from AbstractSet.__rsub__
afonsojanu Aug 31, 2026
9c9a376
Give set and frozenset their own reflected set operators
afonsojanu Aug 31, 2026
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8 changes: 8 additions & 0 deletions stdlib/builtins.pyi
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Original file line number Diff line number Diff line change
Expand Up @@ -1455,12 +1455,16 @@ class set(MutableSet[_T]):
def __contains__(self, o: object, /) -> bool: ...
def __iter__(self) -> Iterator[_T]: ...
def __and__(self, value: AbstractSet[object], /) -> set[_T]: ...
def __rand__(self, value: AbstractSet[object], /) -> set[_T]: ...
def __iand__(self, value: AbstractSet[object], /) -> Self: ...
def __or__(self, value: AbstractSet[_S], /) -> set[_T | _S]: ...
def __ror__(self, value: AbstractSet[_S], /) -> set[_T | _S]: ... # type: ignore[misc]
def __ior__(self, value: AbstractSet[_T], /) -> Self: ... # type: ignore[override,misc]
def __sub__(self, value: AbstractSet[object], /) -> set[_T]: ...
def __rsub__(self, value: AbstractSet[_S], /) -> set[_S]: ... # type: ignore[override,misc]
def __isub__(self, value: AbstractSet[object], /) -> Self: ...
def __xor__(self, value: AbstractSet[_S], /) -> set[_T | _S]: ...
def __rxor__(self, value: AbstractSet[_S], /) -> set[_T | _S]: ... # type: ignore[misc]
def __ixor__(self, value: AbstractSet[_T], /) -> Self: ... # type: ignore[override,misc]
def __le__(self, value: AbstractSet[object], /) -> bool: ...
def __lt__(self, value: AbstractSet[object], /) -> bool: ...
Expand Down Expand Up @@ -1489,9 +1493,13 @@ class frozenset(AbstractSet[_T_co]):
def __contains__(self, o: object, /) -> bool: ...
def __iter__(self) -> Iterator[_T_co]: ...
def __and__(self, value: AbstractSet[object], /) -> frozenset[_T_co]: ...
def __rand__(self, value: AbstractSet[object], /) -> frozenset[_T_co]: ...
def __or__(self, value: AbstractSet[_S], /) -> frozenset[_T_co | _S]: ...
def __ror__(self, value: AbstractSet[_S], /) -> frozenset[_T_co | _S]: ... # type: ignore[misc]
def __sub__(self, value: AbstractSet[object], /) -> frozenset[_T_co]: ...
def __rsub__(self, value: AbstractSet[_S], /) -> frozenset[_S]: ... # type: ignore[override,misc]
def __xor__(self, value: AbstractSet[_S], /) -> frozenset[_T_co | _S]: ...
def __rxor__(self, value: AbstractSet[_S], /) -> frozenset[_T_co | _S]: ... # type: ignore[misc]
def __le__(self, value: AbstractSet[object], /) -> bool: ...
def __lt__(self, value: AbstractSet[object], /) -> bool: ...
def __ge__(self, value: AbstractSet[object], /) -> bool: ...
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2 changes: 1 addition & 1 deletion stdlib/multiprocessing/managers.pyi
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Expand Up @@ -194,7 +194,7 @@ if sys.version_info >= (3, 14):
def __eq__(self, value: object, /) -> bool: ...
def __rand__(self, value: AbstractSet[object], /) -> set[_T]: ...
def __ror__(self, value: AbstractSet[_S], /) -> set[_T | _S]: ... # type: ignore[misc]
def __rsub__(self, value: AbstractSet[_T], /) -> set[_T]: ...
def __rsub__(self, value: AbstractSet[_T], /) -> set[_T]: ... # type: ignore[override]
def __rxor__(self, value: AbstractSet[_S], /) -> set[_T | _S]: ... # type: ignore[misc]
def __class_getitem__(cls, item: Any, /) -> GenericAlias: ...

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4 changes: 4 additions & 0 deletions stdlib/typing.pyi
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Expand Up @@ -739,9 +739,13 @@ class AbstractSet(Collection[_T_co]):
def __gt__(self, other: AbstractSet[Any], /) -> bool: ...
def __ge__(self, other: AbstractSet[Any], /) -> bool: ...
def __and__(self, other: AbstractSet[Any], /) -> AbstractSet[_T_co]: ...
def __rand__(self, other: AbstractSet[Any], /) -> AbstractSet[_T_co]: ...
def __or__(self, other: AbstractSet[_T], /) -> AbstractSet[_T_co | _T]: ...
def __ror__(self, other: AbstractSet[_T], /) -> AbstractSet[_T_co | _T]: ...
def __sub__(self, other: AbstractSet[Any], /) -> AbstractSet[_T_co]: ...
def __rsub__(self, other: Iterable[_T], /) -> AbstractSet[_T]: ...
def __xor__(self, other: AbstractSet[_T], /) -> AbstractSet[_T_co | _T]: ...
def __rxor__(self, other: AbstractSet[_T], /) -> AbstractSet[_T_co | _T]: ...
def __eq__(self, other: object, /) -> bool: ...
def isdisjoint(self, other: Iterable[Any], /) -> bool: ...

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2 changes: 1 addition & 1 deletion stubs/boltons/boltons/setutils.pyi
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Expand Up @@ -40,7 +40,7 @@ class IndexedSet(MutableSet[Any]):
# __sub__ = difference
# __xor__ = symmetric_difference
__rxor__ = symmetric_difference
def __rsub__(self, other: _RSub[_T_co]) -> _RSub[_T_co]: ...
def __rsub__(self, other: _RSub[_T_co]) -> _RSub[_T_co]: ... # type: ignore[override]
def update(self, *others: Iterable[Any]) -> None: ...
def intersection_update(self, *others: Iterable[Any]) -> None: ...
def difference_update(self, *others: Container[Any]) -> None: ...
Expand Down