在if语句检查中休眠线程，Python池

Question

我有一个读取大型文本文件并处理Pools中每一行的代码。对于elif，我需要将整个过程休眠120秒，换句话说，我希望所有创建的其他Pool都暂停。但是在120秒后，所有的Pool应该恢复工作。该代码的功能与此类似：from multiprocessing import Poolimport syssys.tracebacklimit = 0def req(line):    if "@" not in line:        # (some function for processing here)        return line    elif "somestring" in line:        #HERE I NEED TO SLEEP ALL POOLS    else:        # (some function for processing)        return lineif __name__ == "__main__":    pool = Pool(20)    with open("list.txt") as source_file:        # chunk the work into batches of 20 lines at a time        pool.map(req, source_file, 35)