code: def setUpClass(cls):
      cls.root_dir = os.path.join(cls.get_base_temp_dir(), "normal")
      os.mkdir(cls.root_dir)
      cls.samples = get_mock_dataset(cls.root_dir)
      cls.root_punc_dir = os.path.join(cls.get_base_temp_dir(), "punc")
      os.mkdir(cls.root_punc_dir)
      cls.punc_samples = get_mock_dataset(
          cls.root_punc_dir, return_punc=True
      )
  
file_path: audio/test/torchaudio_unittest/datasets/cmudict_test.py
imports: import os
  from pathlib import Path
  from torchaudio.datasets import CMUDict
  from torchaudio_unittest.common_utils import TempDirMixin, TorchaudioTestCase
label_desc: Use image node_id 1 for calling the TestCMUDict obj's underlying member method code with example usage: obj.setUpClass(cls) without return types