线程 Threading

import time

from threading import Thread

def func():

while True:

time.sleep(0.5)

print(123)

def func2():

print("func2 start ")

time.sleep(3)

print("func2 end")

t1 = Thread(target=func)

t2 = Thread(target=func2)

t1.setDaemon(True) #将t1变成守护线程

t1.start()

t2.start()

print("主线程代码结束")

输出

func2 start

主线程代码结束

123

123

123

123

123

func2 end