Method test_timedelta_correct_mean

numpy/_core/tests/test_datetime.py:2476–2480

(self)

                     np.timedelta64(7, 's'))

    def test_timedelta_correct_mean(self):
        # test mainly because it worked only via a bug in that allowed:
        # `timedelta.sum(dtype="f8")` to ignore the dtype request.
        a = np.arange(1000, dtype="m8[s]")
        assert_array_equal(a.mean(), a.sum() / len(a))

    def test_datetime_no_subtract_reducelike(self):
        # subtracting two datetime64 works, but we cannot reduce it, since