请各位大神帮忙看下,我想要在while true里面运行多线程,第一次运行正常,第二次就报...

fu7100

if __name__=='__main__':
    while True:
        for t in threads:
            t.setDaemon(True)
            t.start()
            t.join()
        print u'循环执行完毕,等待10s'
        time.sleep(10)

执行结果:
循环执行完毕,等待10s
Traceback (most recent call last):
  File "C:/Users/Administrator/PycharmProjects/Python2/guangdong/script/2.upload_bimg.py", line 74, in <module>
    t.setDaemon(True)
  File "C:\Python27\lib\threading.py", line 1027, in setDaemon
    self.daemon = daemonic
  File "C:\Python27\lib\threading.py", line 1020, in daemon
    raise RuntimeError("cannot set daemon status of active thread");
RuntimeError: cannot set daemon status of active thread进程已结束,退出代码1

dahe_1984

感觉是python2的bug：

t is dead
Func1 Task --- No.0 start at        Thu Aug 16 17:16:37 2018
Func1 Task --- No.1 start at        Thu Aug 16 17:16:38 2018
t is dead
Func2 Task --- No.0 start at        Thu Aug 16 17:16:39 2018
Func2 Task --- No.1 start at        Thu Aug 16 17:16:41 2018
Main Function End         Thu Aug 16 17:16:43 2018
wait 10s
t is dead
Traceback (most recent call last):
  File "test.py", line 26, in <module>
    t.setDaemon(True)
  File "/usr/local/Cellar/python@2/2.7.15/Frameworks/Python.framework/Versions/2.7/lib/python2.7/threading.py", line 1027, in setDaemon
    self.daemon = daemonic
  File "/usr/local/Cellar/python@2/2.7.15/Frameworks/Python.framework/Versions/2.7/lib/python2.7/threading.py", line 1020, in daemon
    raise RuntimeError("cannot set daemon status of active thread");
RuntimeError: cannot set daemon status of active thread

dahe_1984

Func1 Task --- No.0 start at        Thu Aug 16 17:39:53 2018
Func1 Task --- No.1 start at        Thu Aug 16 17:39:54 2018
Func2 Task --- No.0 start at        Thu Aug 16 17:39:55 2018
Func2 Task --- No.1 start at        Thu Aug 16 17:39:57 2018
Main Function End         Thu Aug 16 17:39:59 2018
wait 10s
Func1 Task --- No.0 start at        Thu Aug 16 17:40:09 2018
Func1 Task --- No.1 start at        Thu Aug 16 17:40:10 2018
Func2 Task --- No.0 start at        Thu Aug 16 17:40:11 2018
Func2 Task --- No.1 start at        Thu Aug 16 17:40:13 2018
Main Function End         Thu Aug 16 17:40:15 2018
wait 10s
Func1 Task --- No.0 start at        Thu Aug 16 17:40:25 2018
Func1 Task --- No.1 start at        Thu Aug 16 17:40:26 2018
Func2 Task --- No.0 start at        Thu Aug 16 17:40:27 2018
Func2 Task --- No.1 start at        Thu Aug 16 17:40:29 2018
Main Function End         Thu Aug 16 17:40:31 2018

dahe_1984

你是不是把threads:变成全局变量了？#coding = utf-8
import threading
from time import ctime,time,sleep

def task1(num):
        for i in range(num):
                print 'Func1 Task --- No.%d start at\t%s' %(i,ctime(time()))
                sleep(1)

def task2(num):
        for i in range(num):
                print 'Func2 Task --- No.%d start at\t%s' % (i, ctime(time()))
                sleep(2)

if __name__ == '__main__':
    while True:
        threads = []
        t1 = threading.Thread(target = task1, args = (2,))
        t2 = threading.Thread(target = task2, args = (2,))
        threads.append(t1)
        threads.append(t2)

        for t in threads:
                t.setDaemon(True)
                t.start()
                t.join()

        print 'Main Function End\t %s' % ctime()
        print u'wait 10s'
        sleep(10)

fu7100

回复 4# dahe_1984
搞定了 , while true循环放在函数里面才行

dahe_1984

放在哪个函数里？

fu7100

回复 6# dahe_1984
你调用的函数或方法里面呀