DEP: Remove index.set_value (#49266)

Author: phofl

doc/source/whatsnew/v2.0.0.rst

@@ -191,7 +191,7 @@ Removal of prior version deprecations/changes
 - Removed deprecated :meth:`Categorical.replace`, use :meth:`Series.replace` instead (:issue:`44929`)
 - Removed the ``numeric_only`` keyword from :meth:`Categorical.min` and :meth:`Categorical.max` in favor of ``skipna`` (:issue:`48821`)
 - Removed :func:`is_extension_type` in favor of :func:`is_extension_array_dtype` (:issue:`29457`)
-- Removed :meth:`Index.get_value` (:issue:`33907`)
+- Removed :meth:`Index.get_value` and :meth:`Index.set_value` (:issue:`33907`, :issue:`28621`)
 - Remove :meth:`DataFrameGroupBy.pad` and :meth:`DataFrameGroupBy.backfill` (:issue:`45076`)
 - Remove ``numpy`` argument from :func:`read_json` (:issue:`30636`)
 - Removed the ``center`` keyword in :meth:`DataFrame.expanding` (:issue:`20647`)

pandas/core/indexes/base.py

@@ -5905,30 +5905,6 @@ def _get_values_for_loc(self, series: Series, loc, key):
 
         return series.iloc[loc]
 
-    @final
-    def set_value(self, arr, key, value) -> None:
-        """
-        Fast lookup of value from 1-dimensional ndarray.
-
-        .. deprecated:: 1.0
-
-        Notes
-        -----
-        Only use this if you know what you're doing.
-        """
-        warnings.warn(
-            (
-                "The 'set_value' method is deprecated, and "
-                "will be removed in a future version."
-            ),
-            FutureWarning,
-            stacklevel=find_stack_level(),
-        )
-        loc = self._engine.get_loc(key)
-        if not can_hold_element(arr, value):
-            raise ValueError
-        arr[loc] = value
-
     _index_shared_docs[
         "get_indexer_non_unique"
     ] = """

pandas/tests/indexes/test_base.py

@@ -813,14 +813,6 @@ def test_is_monotonic_incomparable(self, attr):
         index = Index([5, datetime.now(), 7])
         assert not getattr(index, attr)
 
-    def test_set_value_deprecated(self, simple_index):
-        # GH 28621
-        idx = simple_index
-        arr = np.array([1, 2, 3])
-        with tm.assert_produces_warning(FutureWarning):
-            idx.set_value(arr, idx[1], 80)
-        assert arr[1] == 80
-
     @pytest.mark.parametrize("values", [["foo", "bar", "quux"], {"foo", "bar", "quux"}])
     @pytest.mark.parametrize(
         "index,expected",