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GH1398 Remove cast from Index(..., dtype='categorical').array #1414

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Merged
merged 6 commits into from
Oct 10, 2025
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GH1398 Remove cast from Index(..., dtype='categorical').array #1414

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GH1398 Remove cast from Index(..., dtype='categorical').array
loicdiridollou Oct 9, 2025
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GH1398 Remove cast from Index(..., dtype='categorical').array
loicdiridollou Oct 9, 2025
7d3f78c
GH1398 Remove cast from Index(..., dtype='categorical').array
loicdiridollou Oct 9, 2025
0c40259
GH1398 Remove cast from Index(..., dtype='categorical').array
loicdiridollou Oct 9, 2025
db6f57f
GH1398 Remove cast from Index(..., dtype='categorical').array
loicdiridollou Oct 9, 2025
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GH1398 PR Feedback
loicdiridollou Oct 9, 2025
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3 changes: 3 additions & 0 deletions pandas-stubs/core/indexes/category.pyi
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Original file line number Diff line number Diff line change
Expand Up @@ -6,6 +6,7 @@ from typing import final

import numpy as np
from pandas.core import accessor
from pandas.core.arrays.categorical import Categorical
from pandas.core.indexes.base import Index
from pandas.core.indexes.extension import ExtensionIndex
from typing_extensions import Self
Expand All @@ -18,6 +19,8 @@ from pandas._typing import (
class CategoricalIndex(ExtensionIndex[S1], accessor.PandasDelegate):
codes: np.ndarray = ...
categories: Index = ...
@property
def array(self) -> Categorical: ... # type: ignore[override] # pyrefly: ignore[bad-override]
def __new__(
cls,
data: Iterable[S1] = ...,
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5 changes: 1 addition & 4 deletions tests/indexes/test_indexes.py
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Expand Up @@ -1531,10 +1531,7 @@ def test_array_property() -> None:
"""Test that Index.array and semantic Index.array return ExtensionArray and its subclasses"""
# casting due to pandas-dev/pandas-stubs#1383
check(
assert_type(
cast("Index[pd.CategoricalDtype]", Index([1], dtype="category")).array,
pd.Categorical,
),
assert_type(Index([1], dtype="category").array, pd.Categorical),
pd.Categorical,
int,
)
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