code: def MultiWritePathInfos(self, path_infos):
      
      try:
        self._MultiWritePathInfos(path_infos)
      except MySQLdb.IntegrityError as error:
        client_ids = list(iterkeys(path_infos))
        raise db.AtLeastOneUnknownClientError(client_ids=client_ids, cause=error)
docs: Writes a collection of path info records for specified clients.