Python并发编程-进程间数据共享

• Manager中进程数据不安全
• 通过加锁解决

from multiprocessing import Manager,Process,Lock
def main(dic,lock):
    lock.acquire()
    dic['count'] -=1
    print(dic)
    lock.release()

if __name__ == '__main__':
    m = Manager()
    l = Lock()
    dic = m.dict({'count':100}) #主进程中数据提供到子进程去操作
    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)