@staticmethod
    def _getDagParent(dag):
        if dag.length() is not 1:
            return None
        # Need a copy as we'll be modifying it...
        dag = _api.MDagPath(dag)
        dag.pop()
        return dag
dataset/ETHPy150Open CountZer0/PipelineConstructionSet/python/maya/site-packages/pymel-1.0.3/pymel/core/nodetypes.py/DagNode._getDagParent/operator `<=` -> `is not`