'\'in\' operator for ProductSets
Examples
>>> from sympy import Interval
>>> (2, 3) in Interval(0, 5) * Interval(0, 5)
True
>>> (10, 10) in Interval(0, 5) * Interval(0, 5)
False
Passes operation on to constituent sets'

def _contains(self, element):

    try:
        if (len(element) != len(self.args)):
            return false
    except TypeError:
        return false
    return And(*[set.contains(item) for (set, item) in zip(self.sets, element)])
