1 import time 2 import threading 3 4 def f0(): 5 print(1) 6 def f1(): 7 time.sleep(10) 8 f0() 9 10 t= threading.Thread(target=f1) 11 t.setDaemon(True) # True:主线程不等待子线程执行,主线程结束,程序结束 12 t.start() 13 t= threading.Thread(target=f1) 14 t.setDaemon(True) 15 t.start() 16 t= threading.Thread(target=f1) 17 t.setDaemon(True) 18 t.start()
t.join() 主线程等待子线程执行,t.join(2)最多等待2秒
进程池
p = Pool(5)
p.apply 每个任务是排队进行。进程.join() # 等待
p.apply_async 每一个任务都并发执行可设置回调函数,进程.无join();进程daemon=True # 不等待
1 #!/usr/bin/env python 2 # -*- coding:utf-8 -*- 3 from multiprocessing import Pool 4 import time 5 6 def f1(a): 7 time.sleep(2) 8 print(a) 9 return 100000000 10 11 def f2(arg): 12 print(arg) 13 14 if __name__ =='__main__': 15 p = Pool(5) 16 for i in range(10): 17 p.apply_async(func=f1,args=(i,),callback=f2) 18 print(11111111111111111111) 19 p.close() 20 #p.terminate() 21 p.join()