FIX: add missing import

ivanovmg · ivanovmg · commit 836329399c9c · 2021-02-11T18:42:49.000+07:00
diff --git a/pandas/core/series.py b/pandas/core/series.py
@@ -3234,7 +3234,6 @@ def sort_values(
 
         # GH 35922. Make sorting stable by leveraging nargsort
         values_to_sort = ensure_key_mapped(self, key)._values if key else self._values
-
         sorted_index = nargsort(values_to_sort, kind, bool(ascending), na_position)
 
         result = self._constructor(
diff --git a/pandas/core/sorting.py b/pandas/core/sorting.py
@@ -10,6 +10,7 @@
     Iterable,
     List,
     Optional,
+    Sequence,
     Tuple,
     Union,
 )
