測試代碼

import threading

import time

def do_thread_test():

print 'start thread time:', time.strftime('%H:%M:%S')

time.sleep(5)

print 'stop thread time:', time.strftime('%H:%M:%S')

threads = []

for i in range(2):

thread1 = threading.Thread(target=do_thread_test)

thread1.setDaemon(True)

threads.append(thread1)

for t in threads:

t.start()

for t in threads:

t.join()

print 'stop main thread', time.strftime('%H:%M:%S')

注釋掉join，注釋掉setDaemon(或設置為False)，執行結果

start thread time: 21:57:40

start thread time: 21:57:40

stop main thread 21:57:40 主

stop thread time: 21:57:45

stop thread time: 21:57:45

注釋掉join，設置setDaemon=True,執行結果

start thread time: 21:59:47

start thread time: 21:59:47

stop main thread 21:59:47

join方法的作用是阻塞，等待子線程結束

join無參數,注釋掉setDaemon(或設置為True/False),執行結果

start thread time: 22:02:00

start thread time: 22:02:00

stop thread time: 22:02:05

stop thread time: 22:02:05

stop main thread 22:02:05 主

阻塞時間為time*thread_num

join參數為1，注釋掉setDaemon(或設置為False)，執行結果

start thread time: 22:11:22

start thread time: 22:11:22

stop main thread 22:11:24

stop thread time: 22:11:27

stop thread time: 22:11:27

join參數為1，設置setDaemon=True，執行結果(阻塞time*thread_num)

start thread time: 22:12:38

start thread time: 22:12:38

stop main thread 22:12:40

原文鏈接:https://blog.csdn.net/weixin_44961798/article/details/108269495

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