TYP: update EA.view() type annotation to indicate it returns an EA without dtype parameter #62285
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…thout dtype parameter
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| @overload | ||
| @overload # type: ignore[override] | ||
| def view(self) -> Self: ... |
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It's not really clear to me why I need to add this ignore here (since this is exactly the same as in the base class and the mixin base).
But if not adding it, I get
pandas/core/arrays/datetimelike.py:511: error: Signature of "view" incompatible with supertype "pandas.core.arrays._mixins.NDArrayBackedExtensionArray" [override]
pandas/core/arrays/datetimelike.py:511: note: Superclass:
pandas/core/arrays/datetimelike.py:511: note: @overload
pandas/core/arrays/datetimelike.py:511: note: def view(self) -> DatetimeLikeArrayMixin
pandas/core/arrays/datetimelike.py:511: note: @overload
pandas/core/arrays/datetimelike.py:511: note: def view(self, dtype: ExtensionDtype | str | dtype[Any] | type[str] | type[complex] | type[bool] | type[object] | None = ...) -> ExtensionArray | ndarray[Any, Any]
pandas/core/arrays/datetimelike.py:511: note: Subclass:
pandas/core/arrays/datetimelike.py:511: note: @overload
pandas/core/arrays/datetimelike.py:511: note: def view(self) -> DatetimeLikeArrayMixin
pandas/core/arrays/datetimelike.py:511: note: @overload
pandas/core/arrays/datetimelike.py:511: note: def view(self, dtype: Literal['M8[ns]']) -> DatetimeArray
pandas/core/arrays/datetimelike.py:511: note: @overload
pandas/core/arrays/datetimelike.py:511: note: def view(self, dtype: Literal['m8[ns]']) -> TimedeltaArray
pandas/core/arrays/datetimelike.py:511: note: @overload
pandas/core/arrays/datetimelike.py:511: note: def view(self, dtype: ExtensionDtype | str | dtype[Any] | type[str] | type[complex] | type[bool] | type[object] | None = ...) -> ExtensionArray | ndarray[Any, Any]
pandas/core/arrays/datetimelike.py:511: error: Signature of "view" incompatible with supertype "pandas.core.arrays.base.ExtensionArray" [override]
pandas/core/arrays/datetimelike.py:511: note: Superclass:
pandas/core/arrays/datetimelike.py:511: note: @overload
pandas/core/arrays/datetimelike.py:511: note: def view(self) -> DatetimeLikeArrayMixin
pandas/core/arrays/datetimelike.py:511: note: @overload
pandas/core/arrays/datetimelike.py:511: note: def view(self, dtype: ExtensionDtype | str | dtype[Any] | type[str] | type[complex] | type[bool] | type[object] | None = ...) -> ExtensionArray | ndarray[Any, Any]
pandas/core/arrays/datetimelike.py:511: note: Subclass:
pandas/core/arrays/datetimelike.py:511: note: @overload
pandas/core/arrays/datetimelike.py:511: note: def view(self) -> DatetimeLikeArrayMixin
pandas/core/arrays/datetimelike.py:511: note: @overload
pandas/core/arrays/datetimelike.py:511: note: def view(self, dtype: Literal['M8[ns]']) -> DatetimeArray
pandas/core/arrays/datetimelike.py:511: note: @overload
pandas/core/arrays/datetimelike.py:511: note: def view(self, dtype: Literal['m8[ns]']) -> TimedeltaArray
pandas/core/arrays/datetimelike.py:511: note: @overload
pandas/core/arrays/datetimelike.py:511: note: def view(self, dtype: ExtensionDtype | str | dtype[Any] | type[str] | type[complex] | type[bool] | type[object] | None = ...) -> ExtensionArray | ndarray[Any, Any]
mroeschke
approved these changes
Sep 8, 2025
|
Thanks @jorisvandenbossche |
eicchen
pushed a commit
to eicchen/pandas
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this pull request
Oct 18, 2025
…thout dtype parameter (pandas-dev#62285)
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Running into this in #61925, trying to fix this here separately (as I might have some questions for typing experts on how to get this passing, and don't want to derail the original PR for that)