code: def gzip_file(self, target_path, html):
          
          logger.debug("Gzipping to {}{}".format(self.fs_name, target_path))
  
          # Write GZIP data to an in-memory buffer
          data_buffer = six.BytesIO()
          kwargs = dict(
              filename=path.basename(target_path),
              mode='wb',
              fileobj=data_buffer
          )
          if float(sys.version[:3]) >= 2.7:
              kwargs['mtime'] = 0
          with gzip.GzipFile(**kwargs) as f:
              f.write(six.binary_type(html))
  
          # Write that buffer out to the filesystem
          with self.fs.open(smart_text(target_path), 'wb') as outfile:
              outfile.write(data_buffer.getvalue())
              outfile.close()
docs: Zips up the provided HTML as a companion for the provided path.
  
          Intended to take advantage of the peculiarities of
          Amazon S3's GZIP service.
  
          mtime, an option that writes a timestamp to the output file
          is set to 0, to avoid having s3cmd do unnecessary uploads because
          of differences in the timestamp