def get_nodeset(self, start, stop, step):
	if step <= 0:
	    raise ValueError, 'Step must be positive.'
	ns = self.mod.mutnodeset()	
	while start < stop:
	    ns |= self.rows[start].set.nodes
	    start += step
	return ns
dataset/ETHPy150Open cloudera/hue/desktop/core/ext-py/guppy-0.1.10/guppy/heapy/Part.py/SetPartition.get_nodeset/original