xinrong-databricks commented on a change in pull request #33471:
URL: https://github.com/apache/spark/pull/33471#discussion_r675688102
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File path: python/pyspark/pandas/categorical.py
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@@ -442,8 +442,110 @@ def remove_categories(
def remove_unused_categories(self) -> "ps.Series":
raise NotImplementedError()
- def rename_categories(self, new_categories: pd.Index, inplace: bool =
False) -> "ps.Series":
- raise NotImplementedError()
+ def rename_categories(
+ self, new_categories: Union[list, dict, Callable], inplace: bool =
False
+ ) -> Optional["ps.Series"]:
+ """
+ Rename categories.
+
+ Parameters
+ ----------
+ new_categories : list-like, dict-like or callable
+
+ New categories which will replace old categories.
+
+ * list-like: all items must be unique and the number of items in
+ the new categories must match the existing number of categories.
+
+ * dict-like: specifies a mapping from
+ old categories to new. Categories not contained in the mapping
+ are passed through and extra categories in the mapping are
+ ignored.
+
+ * callable : a callable that is called on all items in the old
+ categories and whose return values comprise the new categories.
+
+ inplace : bool, default False
+ Whether or not to rename the categories inplace or return a copy of
+ this categorical with renamed categories.
Review comment:
Good idea. `inplace` is deprecated in several methods in pandas 1.3.0.
We may adjust that together when we support pandas 1.3.0.
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