'Returns True if \'self\' is a superset of \'other\'.
Examples
>>> from sympy import Interval
>>> Interval(0, 0.5).is_superset(Interval(0, 1))
False
>>> Interval(0, 1).is_superset(Interval(0, 1, left_open=True))
True'

def is_superset(self, other):

    if isinstance(other, Set):
        return other.is_subset(self)
    else:
        raise ValueError(("Unknown    argument    '%s'" % other))
