python 笔记 之 子进程-共享内存

'''
共享内存
multiprocess组件Lock
'''
import multiprocessing
import time
from multiprocessing import Value,Array,Manager
'''
Array数组
Manager
'''

def add1(value,number):
    print("start add1 number={0}".format(number.value))
    for i in range(1,5):
        number.value += value
        print("number add1 = {0}".format(number.value))

def add3(value,number):
    print("start add3 number={0}".format(number.value))
    try:
        for i in range(1,5):
            number.value += value
            print("number add3 = {0}".format(number.value))
    except Exception as e :
        raise e

if __name__ == '__main__':
    print("start main")
    number = Value('d',0) #共用的内存地址
    p1 = multiprocessing.Process(target=add1 ,args=(1,number))
    p3 = multiprocessing.Process(target=add3 ,args=(3,number))
    p1.start()
    p3.start()
    print("end main")