Method add_node

pattern/graph/__init__.py:348–360

Appends a new Node to the graph. An optional base parameter can be used to pass a subclass of Node.

(self, id, *args, **kwargs)

            return self.add_edge(*args, **kwargs)
    
    def add_node(self, id, *args, **kwargs):
        """ Appends a new Node to the graph.
            An optional base parameter can be used to pass a subclass of Node.
        """
        n = kwargs.pop("base", Node)
        n = isinstance(id, Node) and id or self.get(id) or n(id, *args, **kwargs)
        if n.id not in self:
            self.nodes.append(n)
            self[n.id] = n; n.graph = self
            self.root = kwargs.get("root", False) and n or self.root
            # Clear adjacency cache.
            self._adjacency = None
        return n
    
    def add_edge(self, id1, id2, *args, **kwargs):
        """ Appends a new Edge to the graph.