call finalize in DataFrame.stack

Author: arw2019

pandas/core/frame.py

@@ -7097,9 +7097,11 @@ def stack(self, level=-1, dropna=True):
         from pandas.core.reshape.reshape import stack, stack_multiple
 
         if isinstance(level, (tuple, list)):
-            return stack_multiple(self, level, dropna=dropna)
+            result = stack_multiple(self, level, dropna=dropna)
         else:
-            return stack(self, level, dropna=dropna)
+            result = stack(self, level, dropna=dropna)
+
+        return result.__finalize__(self, method="stack")
 
     def explode(
         self, column: Union[str, Tuple], ignore_index: bool = False

pandas/tests/generic/test_finalize.py

@@ -166,10 +166,7 @@
         ),
         marks=not_implemented_mark,
     ),
-    pytest.param(
-        (pd.DataFrame, frame_data, operator.methodcaller("stack")),
-        marks=not_implemented_mark,
-    ),
+    (pd.DataFrame, frame_data, operator.methodcaller("stack")),
     pytest.param(
         (pd.DataFrame, frame_data, operator.methodcaller("explode", "A")),
         marks=not_implemented_mark,