Method agg

pandas/tests/reshape/test_pivot.py:2237–2238

(arr)

    def test_pivot_table_no_column_raises(self):
        # GH 10326
        def agg(arr):
            return np.mean(arr)

        df = DataFrame({"X": [0, 0, 1, 1], "Y": [0, 1, 0, 1], "Z": [10, 20, 30, 40]})
        with pytest.raises(KeyError, match="notpresent"):