BUG: Fix .to_excel() for MultiIndex containing a NaN value #13511

mpuels · mpuels · commit 335cf863b681 · 2016-07-24T22:58:40.000+02:00
diff --git a/pandas/formats/format.py b/pandas/formats/format.py
@@ -1840,7 +1840,8 @@ def _format_hierarchical_rows(self):
                                                  self.df.index.levels,
                                                  self.df.index.labels):
 
-                    values = levels.take(labels, allow_fill=levels._can_hold_na,
+                    values = levels.take(labels,
+                                         allow_fill=levels._can_hold_na,
                                          fill_value=True)
 
                     for i in spans:
