进程线程_daemon

Posted 2020-11-27 hapyygril

1.守护进程：主进程代码结束，守护进程立马结束

#守护进程 daemon:print(‘主‘)执行完成后，p1就结束掉

from multiprocessing import Process
import time
#并发，在同一个终端打印
def work():
    print("123" )
    time.sleep(1)
    print("123done")
def work2():
    print("456" )
    time.sleep(5)
    print("456done")
if __name__=="__main__":
    p1=Process(target=work)
    p2=Process(target=work2)
    p1.daemon=True 
    p1.start()
    p2.start()
    time.sleep(0.1)
    print(‘主‘)
‘‘‘

  123
  456
  主
  456done

‘‘‘

2.守护线程：主线程运行结束【其他非守护线程都运行结束】，守护线程立马结束

#守护线程 daemon:
from threading import Thread
import time
def work():
    print("123" )
    time.sleep(1)
    print("123done")
def work2():
    print("456" )
    time.sleep(5)
    print("456done")
if __name__=="__main__":
    t1=Thread(target=work)
    t2=Thread(target=work2)
    t1.daemon=True 
    t1.start()
    t2.start()
    time.sleep(0.1)
    print(‘主‘)
‘‘‘
123
456
主
123done
456done
‘‘‘