code: def _parse_results(self, results, cached_records):
          
          parser = xml.sax.make_parser()
          handler = RecordsHandler(cached_records)
          parser.setContentHandler(handler)
          parser.parse(results)
          return handler.records
docs: Parses the given results (in MARCXML format).
  
          The given "cached_records" list is a pool of
          already existing parsed records (in order to
          avoid keeping several times the same records in memory)