code: def get_edge_list(self):
          
          edge_objs = list()
  
          for obj_dict_list in self.obj_dict['edges'].values():
              edge_objs.extend([
                  Edge(obj_dict=obj_d)
                  for obj_d
                  in obj_dict_list])
  
          return edge_objs
docs: Get the list of Edge instances.
  
          This method returns the list of Edge instances
          composing the graph.