code: def untargz(input_targz_file, untar_to_dir):
      
      assert tarfile.is_tarfile(input_targz_file), 'Not a tar file.'
      tarball = tarfile.open(input_targz_file)
      return_value = os.path.join(untar_to_dir, tarball.getmembers()[0].name)
      tarball.extractall(path=untar_to_dir)
      tarball.close()
      return return_value
docs: This module accepts a tar.gz archive and untars it.
  
      RETURN VALUE: path to the untar-ed directory/file
  
      NOTE: this module expects the multiple files to be in a directory before
            being tar-ed.