code: def test_history_length(self, history):
      assert len(history) == self.test_epochs
      # we expect to have the extracted batches for each epoch
      assert len(history[:, "batches"]) == self.test_epochs
  
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 5 for calling the TestHistory obj's underlying member method code with example usage: obj.test_history_length(history) without return types