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CLN: remove CategoricalIndex.unique #40995

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Merged
merged 1 commit into from
Apr 19, 2021
Merged

CLN: remove CategoricalIndex.unique #40995

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9 changes: 0 additions & 9 deletions pandas/core/indexes/category.py
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Original file line number Diff line number Diff line change
Expand Up @@ -386,15 +386,6 @@ def fillna(self, value, downcast=None):

return type(self)._simple_new(cat, name=self.name)

@doc(Index.unique)
def unique(self, level=None):
if level is not None:
self._validate_index_level(level)
result = self._values.unique()
# Use _simple_new instead of _shallow_copy to ensure we keep dtype
# of result, not self.
return type(self)._simple_new(result, name=self.name)

def reindex(
self, target, method=None, level=None, limit=None, tolerance=None
) -> tuple[Index, np.ndarray | None]:
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2 changes: 1 addition & 1 deletion pandas/core/indexes/extension.py
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Original file line number Diff line number Diff line change
Expand Up @@ -331,7 +331,7 @@ def _get_unique_index(self):
return self

result = self._data.unique()
return self._shallow_copy(result)
return type(self)._simple_new(result, name=self.name)

@doc(Index.map)
def map(self, mapper, na_action=None):
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