19 lines
598 B
Python
19 lines
598 B
Python
|
from __future__ import annotations
|
||
|
|
|
||
|
|
from typing import TYPE_CHECKING
|
||
|
|
|
||
|
|
import pyarrow as pa
|
||
|
|
|
||
|
|
from narwhals._arrow.utils import ArrowSeriesNamespace
|
||
|
|
|
||
|
|
if TYPE_CHECKING:
|
||
|
|
from narwhals._arrow.series import ArrowSeries
|
||
|
|
from narwhals._arrow.typing import Incomplete
|
||
|
|
|
||
|
|
|
||
|
|
class ArrowSeriesCatNamespace(ArrowSeriesNamespace):
|
||
|
|
def get_categories(self) -> ArrowSeries:
|
||
|
|
# NOTE: Should be `list[pa.DictionaryArray]`, but `DictionaryArray` has no attributes
|
||
|
|
chunks: Incomplete = self.native.chunks
|
||
|
|
return self.with_native(pa.concat_arrays(x.dictionary for x in chunks).unique())
|