REF: Share Index.delete (#43934)

Author: jbrockmendel

pandas/core/indexes/base.py

@@ -2495,6 +2495,7 @@ def is_all_dates(self) -> bool:
         )
         return self._is_all_dates
 
+    @final
     @cache_readonly
     def _is_multi(self) -> bool:
         """
@@ -6299,7 +6300,13 @@ def delete(self: _IndexT, loc) -> _IndexT:
         >>> idx.delete([0, 2])
         Index(['b'], dtype='object')
         """
-        res_values = np.delete(self._data, loc)
+        values = self._values
+        if isinstance(values, np.ndarray):
+            # TODO(__array_function__): special casing will be unnecessary
+            res_values = np.delete(values, loc)
+        else:
+            res_values = values.delete(loc)
+
         # _constructor so RangeIndex->Int64Index
         return self._constructor._simple_new(res_values, name=self.name)
 

pandas/core/indexes/extension.py

@@ -198,17 +198,6 @@ def __getitem__(self, key):
 
     # ---------------------------------------------------------------------
 
-    def delete(self, loc):
-        """
-        Make new Index with passed location(-s) deleted
-
-        Returns
-        -------
-        new_index : Index
-        """
-        arr = self._data.delete(loc)
-        return type(self)._simple_new(arr, name=self.name)
-
     def repeat(self, repeats, axis=None):
         nv.validate_repeat((), {"axis": axis})
         result = self._data.repeat(repeats, axis=axis)