Remove boxplot from _dataframe_apply_whitelist (#17381)

Author: jbrockmendel

pandas/core/groupby.py

@@ -63,6 +63,8 @@
 import pandas.core.common as com
 from pandas.core.config import option_context
 
+from pandas.plotting._core import boxplot_frame_groupby
+
 from pandas._libs import lib, groupby as libgroupby, Timestamp, NaT, iNaT
 from pandas._libs.lib import count_level_2d
 
@@ -168,8 +170,9 @@
                             {'nlargest', 'nsmallest'}) -
                            {'boxplot'}) | frozenset(['dtype', 'unique'])
 
-_dataframe_apply_whitelist = (_common_apply_whitelist |
-                              frozenset(['dtypes', 'corrwith']))
+_dataframe_apply_whitelist = ((_common_apply_whitelist |
+                              frozenset(['dtypes', 'corrwith'])) -
+                              {'boxplot'})
 
 _cython_transforms = frozenset(['cumprod', 'cumsum', 'shift',
                                 'cummin', 'cummax'])
@@ -4280,9 +4283,7 @@ def groupby_series(obj, col=None):
             results.index = _default_index(len(results))
         return results
 
-
-from pandas.plotting._core import boxplot_frame_groupby  # noqa
-DataFrameGroupBy.boxplot = boxplot_frame_groupby
+    boxplot = boxplot_frame_groupby
 
 
 class PanelGroupBy(NDFrameGroupBy):

pandas/tests/groupby/test_whitelist.py

@@ -42,7 +42,6 @@
     'pct_change',
     'skew',
     'plot',
-    'boxplot',
     'hist',
     'median',
     'dtypes',