code: def load_model_by_id(self, model_id):
          
  
          with open(os.path.join(self.path, str(model_id) + ".json")) as fin:
              json_str = fin.read().replace("\n", "")
  
          load_model = json_to_graph(json_str)
          return load_model
docs: Get the model by model_id
  
          Parameters
          ----------
          model_id : int
              model index
          
          Returns
          -------
          load_model : Graph
              the model graph representation