docs: def _augment_network(self, edge_dict):
          """Given a dictionary of edges (edge id -> feature list), add all of
          these to the CoNetwork object
          """
          for (vertex0, vertex1), feature_list in edge_dict.items():
              edge_obj = Edge(vertex0, vertex1, feature_list)
              self.edges[(vertex0, vertex1)] = edge_obj
              self._add_edge_to_vertex(vertex0, edge_obj)
              self._add_edge_to_vertex(vertex1, edge_obj)