code: def _untar_dataset_files(dpath):
      for dtype in ("train", "valid"):
          unzip_files_path = os.path.join(dpath, dtype)
          logging.info(f"Unzipping {dtype} files at {unzip_files_path}")
          _untar_dir_files(unzip_files_path)
  
file_path: ParlAI/parlai/tasks/natural_questions/build.py
imports: import os
  from tqdm import tqdm
  import parlai.core.build_data
  import parlai.utils.logging
label_desc: Use image node_id 4 for calling a global function with example usage: _untar_dataset_files(dpath) without return types