code: def diff_record(self, record):
          
          rec = self.get_record(record._record_type, record.host)
          if rec is not None and record is not None:
              return {'removed': tuple(set(rec.results) - set(record.results)),
                      'added': tuple(set(record.results) - set(rec.recults))}
          else:
              return False
docs: Return the removed and added diffs