(self)
Initialize a digraph.
Initialize a digraph.
Initialize a digraph .
def __init__(self):
        """
        Initialize a digraph.
        """
        common.__init__(self)
        labeling.__init__(self)
        self.node_neighbors = {}     # Pairing: Node -> Neighbors
        self.node_incidence = {}
def __init__ ( self ) : common . __init__ ( self ) labeling . __init__ ( self ) self . node_neighbors = { } # Pairing: Node -> Neighbors self . node_incidence = { }