code: def add_edges(self, edges, *args, **kwargs):
          
          for edge in edges:
              self.add_edge(edge, *args, **kwargs)
docs: Adds edges to the graph. Takes optional arguments for 
          ``DictGraph.add_edge``.
          
          Arguments:
          
            - edges(iterable) Sequence of edges to be added to the 
              ``DictGraph``.