wrong opeartor

topper-123 · topper-123 · commit 53d0ce260135 · 2020-10-28T10:01:51.000Z
diff --git a/pandas/core/generic.py b/pandas/core/generic.py
@@ -5441,7 +5441,7 @@ def _dir_additions(self) -> Set[str]:
         """
         additions = super()._dir_additions()
         if self._info_axis._can_hold_strings:
-            additions &= self._info_axis._dir_additions_for_owner
+            additions.update(self._info_axis._dir_additions_for_owner)
         return additions
 
     # ----------------------------------------------------------------------
