Class Links

pattern/graph/__init__.py:202–220

        return not self.__eq__(node)

class Links(list):
    
    def __init__(self): 
        """ A list in which each node has an associated edge.
            The edge() method returns the edge for a given node id.
        """
        self.edges = dict()
    
    def append(self, node, edge=None):
        if node.id not in self.edges:
            list.append(self, node)
        self.edges[node.id] = edge

    def remove(self, node):
        list.remove(self, node)
        self.edges.pop(node.id, None)

    def edge(self, node): 
        return self.edges.get(isinstance(node, Node) and node.id or node)

#--- EDGE ------------------------------------------------------------------------------------------