def isSubSet(self, other):
        if isinstance(other, ObjectSet):
            other = other.asSelectionSet()
        return set(self).issubset(other)
:rtype: `bool`
dataset/ETHPy150Open CountZer0/PipelineConstructionSet/python/maya/site-packages/pymel-1.0.3/pymel/core/nodetypes.py/SelectionSet.isSubSet