docs: def download_extract_tar(tar_url, folder, tar_filename=''):
      """
      Download and extract the tar at the url to the given folder
  
      Args:
          tar_url (str): URL of tar file to download
          folder (str): Location of parent directory to extract to. Doesn't have to exist
          tar_filename (str): Location to download tar. Default is to a temp file
      """
      try:
          makedirs(folder)
      except OSError:
          if not isdir(folder):
              raise
      data_file = tar_filename
      if not data_file:
          fd, data_file = mkstemp('.tar.gz')
          download(tar_url, os.fdopen(fd, 'wb'))
      else:
          download(tar_url, data_file)
  
      with tarfile.open(data_file) as tar:
          tar.extractall(path=folder)