def _contains(self, other):

        if isinstance(other, Set) and other.is_FiniteSet:
            return all(self.__contains__(i) for i in other)

        return self.__contains__(other)
sympy.sets uses the _contains method, so include it for compatibility.
dataset/ETHPy150Open sympy/sympy/sympy/geometry/entity.py/GeometrySet._contains