refactor

Author: topper-123

pandas/core/generic.py

@@ -5439,8 +5439,10 @@ def _dir_additions(self) -> Set[str]:
         add the string-like attributes from the info_axis.
         If info_axis is a MultiIndex, it's first level values are used.
         """
-        additions = self._info_axis._dir_additions_for_owner
-        return super()._dir_additions().union(additions)
+        additions = super()._dir_additions()
+        if self._info_axis._can_hold_strings:
+            additions &= self._info_axis._dir_additions_for_owner
+        return additions
 
     # ----------------------------------------------------------------------
     # Consolidation of internals

pandas/core/indexes/base.py

@@ -577,14 +577,11 @@ def _dir_additions_for_owner(self) -> Set[str_t]:
 
         If this is a MultiIndex, it's first level values are used.
         """
-        if self._can_hold_strings:
-            return {
-                c
-                for c in self.unique(level=0)[:100]
-                if isinstance(c, str) and c.isidentifier()
-            }
-        else:
-            return set()
+        return {
+            c
+            for c in self.unique(level=0)[:100]
+            if isinstance(c, str) and c.isidentifier()
+        }
 
     # --------------------------------------------------------------------
     # Array-Like Methods