code: def iter_archive(self, resource):
      
      if isinstance(resource, six.string_types):
        resource = resource_lib.Resource(path=resource)
      return extractor.iter_archive(resource.path, resource.extract_method)
docs: Returns iterator over files within archive.
  
      **Important Note**: caller should read files as they are yielded.
      Reading out of order is slow.
  
      Args:
        resource: path to archive or `tfds.download.Resource`.
  
      Returns:
        Generator yielding tuple (path_within_archive, file_obj).