NameError: name 'unix_seconds_to_datetime' is not defined
inp = [1, 1.5]
expected = [datetime.datetime(1970, 1, 1, 0, 0, 1, tzinfo=datetime.timezone.utc), datetime.datetime(1970, 1, 1, 0, 0, 1, 500000, tzinfo=datetime.timezone.utc)]

    @pytest.mark.parametrize("inp, expected", [
        ([1, 1.5], [
            datetime.datetime(1970, 1, 1, 0, 0, 1, tzinfo=UTC),
            datetime.datetime(1970, 1, 1, 0, 0, 1, 500000, tzinfo=UTC),
(9 more lines...)