Deprecate mapper argument in rename #44627

Author: Varun270

pandas/core/frame.py

@@ -5192,7 +5192,7 @@ def rename(
         2  2  5
         4  3  6
         """
-        return super().rename(
+        return super()._rename(
             mapper=mapper,
             index=index,
             columns=columns,

pandas/core/generic.py

@@ -989,7 +989,7 @@ def squeeze(self, axis=None):
     # ----------------------------------------------------------------------
     # Rename
 
-    def rename(
+    def _rename(
         self: NDFrameT,
         mapper: Renamer | None = None,
         *,

pandas/core/series.py

@@ -4468,10 +4468,8 @@ def align(
 
     def rename(
         self,
-        mapper=None,
-        *,
         index=None,
-        columns=None,
+        *,
         axis=None,
         copy=True,
         inplace=False,
@@ -4546,7 +4544,7 @@ def rename(
         if mapper is None:
             mapper = index
         if callable(mapper) or is_dict_like(mapper):
-            return super().rename(
+            return super()._rename(
                 mapper, copy=copy, inplace=inplace, level=level, errors=errors
             )
         else: