daemonic processes are not allowed to have children
import multiprocessing import time def func(msg): time.sleep(1) print multiprocessing.current_process().name + '-' + msg def spider(): time.sleep(2) print multiprocessing.current_process().name + '-' + msg try: pool1 = multiprocessing.Pool(processes=10) for i in [page for page in range(100)]: msg = "word %d" % (i) print "msg",msg pool1.apply_async(spider, (msg,)) pool1.close() pool1.join() except Exception as e : print e if __name__ == "__main__": start_time = time.time() pool = multiprocessing.Pool(processes=10) results = [] for i in [page for page in range(10)]: msg = "hello %d" % (i) results.append(pool.apply_async(func, (msg,))) pool.close() pool.join() print time.time()-start_time
子进程不能在通过multiprocessing创建后代进程,否则当父进程退出后,它终结其daemon子进程,那孙子进程就成了孤儿进程了。当尝试这么做时,会报错:AssertionError: daemonic processes are not allowed to have children
如果觉得对您有帮助,麻烦您点一下推荐,谢谢!
好记忆不如烂笔头
好记忆不如烂笔头
【推荐】编程新体验,更懂你的AI,立即体验豆包MarsCode编程助手
【推荐】凌霞软件回馈社区,博客园 & 1Panel & Halo 联合会员上线
【推荐】抖音旗下AI助手豆包,你的智能百科全书,全免费不限次数
【推荐】博客园社区专享云产品让利特惠,阿里云新客6.5折上折
【推荐】轻量又高性能的 SSH 工具 IShell:AI 加持,快人一步