Python之Process(二)

Python之Process(二)

实例：

#!/usr/bin/env python# -*- coding:utf8 -*-# @Time     : 2017/12/11 17:12# @Author   : hantong# @File     : process_3.pyimport multiprocessing# lock = multiprocessing.Lock()# lock.acquire()  获取锁# lock.release()  释放锁#with lock:#不加锁程序#number +1#number +3import timedef add(number,value,lock):    with lock:        print("init add{0} number = {1}".format(value,number))        for i in xrange(1,5):            number += value            time.sleep(value)            print("add{0} number = {1}".format(value,number))if __name__ == "__main__":    lock = multiprocessing.Lock()    number = 0    p1 = multiprocessing.Process(target=add,args=(number,1,lock))    p2 = multiprocessing.Process(target=add,args=(number,3,lock))    p1.start()    p2.start()    print("main end")

执行结果：

main end
init add1 number = 0
add1 number = 1
add1 number = 2
add1 number = 3
add1 number = 4
init add3 number = 0
add3 number = 3
add3 number = 6
add3 number = 9
add3 number = 12