def __init__(self, node_type=str):
        try:
            import xml.etree.ElementTree
        except __HOLE__:
             raise ImportError('GraphML reader requires '
                               'xml.elementtree.ElementTree')
        self.node_type=node_type
        self.multigraph=False # assume multigraph and test for parallel edges
dataset/ETHPy150Open gkno/gkno_launcher/src/networkx/readwrite/graphml.py/GraphMLReader.__init__