(self, node)
return node in self.node_links
Return whether the requested node exists.

        @type  node: node
        @param node: Node identifier

        @rtype:  boolean
        @return: Truth-value for node existence.
Return whether the requested node exists.
Return whether the requested node exists .
def has_node(self, node):
        """
        Return whether the requested node exists.

        @type  node: node
        @param node: Node identifier

        @rtype:  boolean
        @return: Truth-value for node existence.
        """
        return node in self.node_links
def has_node ( self , node ) : return node in self . node_links