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TYP: Support iteration of StringDType arrays #29227

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Jun 19, 2025
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TYP: Support iteration of StringDType arrays #29227

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8 changes: 6 additions & 2 deletions numpy/__init__.pyi
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Original file line number Diff line number Diff line change
Expand Up @@ -2577,11 +2577,15 @@ class ndarray(_ArrayOrScalarCommon, Generic[_ShapeT_co, _DTypeT_co]):
# `tuple[int]` to `tuple[Never]` or `tuple[int, int]` to `tuple[Never, Never]`.
# This way the bug only occurs for 9-D arrays, which are probably not very common.
@overload
def __iter__(self: ndarray[tuple[Never, Never, Never, Never, Never, Never, Never, Never, Never]], /) -> Iterator[Any]: ...
def __iter__(
self: ndarray[tuple[Never, Never, Never, Never, Never, Never, Never, Never, Never], Any], /
) -> Iterator[Any]: ...
@overload # == 1-d & dtype[T \ object_]
def __iter__(self: ndarray[tuple[int], dtype[_NonObjectScalarT]], /) -> Iterator[_NonObjectScalarT]: ...
@overload # == 1-d & StringDType
def __iter__(self: ndarray[tuple[int], dtypes.StringDType], /) -> Iterator[str]: ...
@overload # >= 2-d
def __iter__(self: ndarray[tuple[int, int, *tuple[int, ...]], dtype[_ScalarT]], /) -> Iterator[NDArray[_ScalarT]]: ...
def __iter__(self: ndarray[tuple[int, int, *tuple[int, ...]], _DTypeT], /) -> Iterator[ndarray[_AnyShape, _DTypeT]]: ...
@overload # ?-d
def __iter__(self, /) -> Iterator[Any]: ...

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