def neighbors(self, n):
        """Return an iterator over all neighbors of node n in the 
           dense graph.

        """
        try:
            return iter(set(self.adj) - set(self.adj[n]) - set([n]))
        except KeyError:
            raise NetworkXError((n,)%"The node %s is not in the graph.")
dataset/ETHPy150Open networkx/networkx/examples/subclass/antigraph.py/AntiGraph.neighbors/swapped operands of `%`