code: def test_history_jagged_batches(self, history_cls):
      h = history_cls()
      for num_batch in (1, 2):
          h.new_epoch()
          for _ in range(num_batch):
              h.new_batch()
      # Make sure we can access this batch
      assert h[-1, "batches", 1] == {}
  
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 29 for calling the TestHistory obj's underlying member method code with example usage: obj.test_history_jagged_batches(history_cls) without return types