code: def test_history_retrieve_single_value(self, history, ref):
      total_loss_0 = history[0, "total_loss"]
      assert total_loss_0 == ref[0]["total_loss"]
  
imports: import pickle
  import time
  import multiprocessing
  from functools import partial
  import numpy
  import pytest
  import torch
  from torch.distributed import TCPStore
  from sklearn.datasets import make_classification
label_desc: Use image node_id 12 for calling the TestHistory obj's underlying member method code with example usage: obj.test_history_retrieve_single_value(history, ref) without return types