CLN: fixed typing issue

Author: jacobaustin123

pandas/core/indexes/base.py

@@ -4524,7 +4524,7 @@ def asof_locs(self, where, mask):
 
         return result
 
-    def sort_values(self, return_indexer=False, ascending=True, key : Callable = None):
+    def sort_values(self, return_indexer=False, ascending=True, key : Union[Callable, None] = None):
         """
         Return a sorted copy of the index.
 
@@ -4537,7 +4537,7 @@ def sort_values(self, return_indexer=False, ascending=True, key : Callable = Non
             Should the indices that would sort the index be returned.
         ascending : bool, default True
             Should the index values be sorted in an ascending order.
-        key : Callable, default None
+        key : Union[Callable, None] , default None
             Apply a key function to the indices before sorting, like sorted.
 
         Returns

pandas/core/series.py

@@ -3378,9 +3378,9 @@ def sort_index(
 
             # Check monotonic-ness before sort an index
             # GH11080
-            if ((ascending and index.is_monotonic_increasing) or (
+            if (ascending and index.is_monotonic_increasing) or (
                 not ascending and index.is_monotonic_decreasing
-            )) and key is None:
+            ):
                 if inplace:
                     return
                 else: