whatsnew

Author: rhshadrach

doc/source/whatsnew/v1.1.0.rst

@@ -932,6 +932,8 @@ Groupby/resample/rolling
   to the input DataFrame is inconsistent. An internal heuristic to detect index mutation would behave differently for equal but not identical
   indices. In particular, the result index shape might change if a copy of the input would be returned.
   The behaviour now is consistent, independent of internal heuristics. (:issue:`31612`, :issue:`14927`, :issue:`13056`)
+- Bug in :meth:`core.groupby.DataFrameGroupBy.quantile` raises ``TypeError`` for non-numeric types rather than dropping columns (:issue:`27892`)
+
 
 Reshaping
 ^^^^^^^^^

pandas/core/groupby/groupby.py

@@ -2509,7 +2509,7 @@ def _get_cythonized_result(
             key = base.OutputKey(label=name, position=idx)
             output[key] = result
 
-        # Note: we don't raise on an frame/series with no rows
+        # Check error_msg so we don't raise on an frame/series with no rows
         if len(output) == 0 and error_msg != "":
             raise TypeError(error_msg)