code: def extractor_cls(self):
          
          file_cls = None
  
          # only catches ".gz", even from ".tar.gz"
          if self.is_tar:
              file_cls = TarFile
          elif self.is_zip:
              file_cls = ZipFile
          else:
              logger.info("Couldn't recognize archive suffix: {0}.".format(
                  self.suffix))
  
          return file_cls
docs: Returns the class that can read this archive based on archive suffix.
          Returns:
              Class that can read this archive or None if no such exists.