Function func

dask/dataframe/dask_expr/tests/test_groupby.py:798–799

(df)

@pytest.mark.filterwarnings("ignore:DataFrameGroupBy.apply operated ")
def test_groupby_udf_user_warning(df, pdf):
    def func(df):
        return df + 1

    expected = pdf.groupby("x").apply(func)
    with pytest.warns(UserWarning, match="`meta` is not specified"):