python学习笔记(59) *进程之间的数据共享

m = Manager()　　# 很多数据都是进程不安全的(需要加锁)

dic = m.dict({'count':100})

 

from  multiprocessing import Manager,Process,Lock

def main(dic,lock):
    lock.acquire()
    dic['count'] -= 1
    lock.release()



if __name__ == '__main__':
    m = Manager()
    l = Lock()
    dic = m.dict({'count':100})
    p_lst = []
    for i in range(50):
        p = Process(target=main,args=(dic,l))
        p.start()
        p_lst.append(p)

    for i in p_lst:
        i.join()

    print('主进程',dic)