class_docstr: Dataset used to parallelize the transformation of the dataset via a DataLoader
code: def init_folders(self):
      for class_name in self.dataset.class_names:
          os.makedirs(
              os.path.join(
                  self.output_path, self.dataset.split, class_name
              ),
              exist_ok=True,
          )
  
imports: import argparse
  import os
  import shutil
  from scipy import io
  from torch.utils.data import DataLoader
  from tqdm import tqdm
  from vissl.utils.download import download_and_extract_archive, download_url
  from vissl.utils.io import cleanup_dir
label_desc: Use image node_id 2 for calling the StandfordCarsMapper obj's underlying member method code with example usage: obj.init_folders() without return types