def _validate_valign(self, val):
        try:
            assert val in ["t", "m", "b", None]
        except __HOLE__:
            raise Exception("Alignment %s is invalid, use t, m, b or None!" % val)
dataset/ETHPy150Open kxxoling/PTable/prettytable/prettytable.py/PrettyTable._validate_valign