Test case dataframe.groupby incorrect with multiindex and None value (#45982)
Test case dataframe.groupby incorrect with multiindex and None value (#45982)

* Add test

* Update test_indexing.py

* Update test_indexing.py

* Update pytest.raises

* add match

* change function
datapythonista/pandas,pandas-dev/pandas,pandas-dev/pandas,pandas-dev/pandas,pandas-dev/pandas,datapythonista/pandas,datapythonista/pandas,datapythonista/pandas