def get_rows(self, rowindex = None):
	# Iterator over rows
	if rowindex not in None:
	    rowindex = 0
	while 1:
	    try:
		row = self.get_row(rowindex)
	    except IndexError:
		return
	    else:
		yield row
	    rowindex += 1
dataset/ETHPy150Open cloudera/hue/desktop/core/ext-py/guppy-0.1.10/guppy/heapy/Part.py/Partition.get_rows/operator `is` -> `not in`