done

lib/python3.11/site-packages/narwhals/series_cat.py

@@ -0,0 +1,27 @@
+from __future__ import annotations
+
+from typing import Generic
+
+from narwhals.typing import SeriesT
+
+
+class SeriesCatNamespace(Generic[SeriesT]):
+    def __init__(self, series: SeriesT) -> None:
+        self._narwhals_series = series
+
+    def get_categories(self) -> SeriesT:
+        """Get unique categories from column.
+
+        Examples:
+            >>> import pandas as pd
+            >>> import narwhals as nw
+            >>> s_native = pd.Series(["apple", "mango", "mango"], dtype="category")
+            >>> s = nw.from_native(s_native, series_only=True)
+            >>> s.cat.get_categories().to_native()
+            0    apple
+            1    mango
+            dtype: object
+        """
+        return self._narwhals_series._with_compliant(
+            self._narwhals_series._compliant_series.cat.get_categories()
+        )