manager 实现进程之间的数据共享 list dict

 1 from multiprocessing import Process,Manager,Lock
 2 def work(dic,lock):
 3     # with 语法 可以自动的上锁和解锁
 4     with lock:
 5         dic["count"] -= 1
 6     """
 7     lock.acquire()
 8     dic["count"] -= 1
 9     lock.release()
10     """
11 
12 if __name__ == ‘__main__‘:
13     lst = []
14     # 创建一把锁
15     lock = Lock()
16     m = Manager()
17     dic = m.dict({"count" : 1000})
18 
19     for i in range(100):
20         p = Process(target=work,args=(dic,lock))
21         p.start()
22         lst.append(p)
23 
24     for i in lst:
25         i.join()
26 
27     print(dic,type(dic))