Moving ensure and take

Author: brandonmburroughs

doc/source/whatsnew/v0.19.1.txt

@@ -30,10 +30,10 @@ Performance Improvements
 
 Bug Fixes
 ~~~~~~~~~
+- Bug in ``Series.sort_index`` where parameters ``kind`` and ``na_position`` did not exist (:issue:`13589`, :issue:`14444`)
 
 
 
-- Bug in ``Series.sort_index`` where parameters ``kind`` and ``na_position`` did not exist (:issue:`13589`, :issue:`14444`)
 
 - Bug in localizing an ambiguous timezone when a boolean is passed (:issue:`14402`)
 

pandas/core/series.py

@@ -1783,14 +1783,14 @@ def sort_index(self, axis=0, level=None, ascending=True, inplace=False,
         elif isinstance(index, MultiIndex):
             from pandas.core.groupby import _lexsort_indexer
             indexer = _lexsort_indexer(index.labels, orders=ascending)
-            indexer = _ensure_platform_int(indexer)
-            new_index = index.take(indexer)
+
         else:
             from pandas.core.groupby import _nargsort
-
             indexer = _nargsort(index, kind=kind, ascending=ascending,
                                 na_position=na_position)
-            new_index = index.take(indexer)
+
+        indexer = _ensure_platform_int(indexer)
+        new_index = index.take(indexer)
 
         new_values = self._values.take(indexer)
         result = self._constructor(new_values, index=new_index)