def __init__(self):
    super(ExplodedGraph, self).__init__()
    self.nodes = collections.defaultdict(ExplodedNode)
    self.root_id = None
    self.incomplete_line = ''
def __init__(self):
    super(ExplodedGraph, self).__init__()
    self.nodes = collections.defaultdict(ExplodedNode)
    self.root_id = None
    self.incomplete_line = 