def isEqual(self, other ):
        return self.asSelectionSet() == SelectionSet(other)
do not use __eq__ to test equality of set contents. __eq__ will only tell you if
dataset/ETHPy150Open CountZer0/PipelineConstructionSet/python/maya/site-packages/pymel-1.0.3/pymel/core/nodetypes.py/ObjectSet.isEqual