code: def untargz_file(
      file: str,
      dest_dir: str = get_data_dir(),
      name: Optional[str] = None,
  ):
      """Untar and unzip a .tar.gz file to disk.
  
      Parameters
      ----------
      file: str
          The filepath to decompress
      dest_dir: str
          The directory to save the file in
      name: str
          The file name to save it as.  If omitted, it will use the file name
      """
      if name is None:
          name = file
      tar = tarfile.open(name)
      tar.extractall(path=dest_dir)
      tar.close()
  
imports: import joblib
  import gzip
  import pickle
  import os
  import tempfile
  import tarfile
  import zipfile
  import logging
  from urllib.request import urlretrieve
  from typing import Any, Iterator, List, Optional, Tuple, Union, cast, IO
  import pandas
  import numpy
  import deepchem
label_desc: Use image node_id 4 for calling a global function with example usage: untargz_file(file, dest_dir, name) without return types