python - time.sleep 阻塞 while 线程中的循环

Question

当我在线程中运行 While True 循环并使用 time.sleep() 函数时，循环将停止循环。

我正在使用此代码:

import threading
from time import sleep

class drive_worker(threading.Thread):

    def __init__(self):
        super(drive_worker, self).__init__()
        self.daemon = True
        self.start()

    def run(self):
        while True:
            print('loop')
            #some code
            time.sleep(0.5)

要启动线程，我使用此代码:

thread = drive_worker()

Answer 1

循环停止，因为您将线程标记为守护进程。当只剩下守护线程运行时，程序终止。

self.daemon = True # remove this statement and the code should work as expected

或者让主线程等待守护线程完成

dthread = drive_worker()
# no call to start method since your constructor does that
dthread.join() #now the main thread waits for the new thread to finish