def do_clean_board(cursor=None): thq = Board.all() if cursor: thq.with_cursor(cursor) board = thq.get() if not board: logging.info("stop board clean") return threads = Thread.load_list(board.thread, board.key().name()) board.thread = [th for (th,data) in threads if data] fill_board(board) board.put() Cache.remove("board", board.key().name()) deferred.defer(do_clean_board, thq.cursor())