进程通讯 

 1 import multiprocessing
 2 import queue
 3 def foo(num,num2,q):
 4     num2 +=444
 5     num+=1
 6     num+=1
 7     q.put((num,num2))  #  可以传数据
 8 
 9 
10 if __name__ == '__main__':
11     # q = queue.Queue()  # 创建的是线程队列
12     q = multiprocessing.Queue()  # 进程队列
13     num = 1
14     num2 = 3
15     p = multiprocessing.Process(target=foo,args=(num,num2,q))
16     p.start()
17     print(q.get()[1])
18     # print(id(q))
19     # print(q.get())
20     # print(q.get())
21 输出：
22 447

管道：

import time
from multiprocessing import Pipe,Process



def f(conn):
    conn.send('hello')
    time.sleep(2)
    response = conn.recv()
    print('response',response)
    conn.close()
    print('q_id',id(conn))

if __name__ == '__main__':
    parent_conn,child_conn = Pipe()
    p = Process(target=f,args=(child_conn,))
    p.start()
    print(parent_conn.recv())
    parent_conn.send('who n你是 you')
输出：
hello
response who n你是 you
q_id 62791536

进程信息共享》

 1 from multiprocessing import Manager,Process
 2 
 3 
 4 def add(a,b,c):
 5     a['1'] = 'hello'
 6     a[c] = 1
 7     b.append(1000)
 8     print(c)
 9 
10 if __name__ == '__main__':
11     with Manager() as f:
12         dict_f = f.dict()
13         l = f.list(range(5))
14         l_lsit = []
15         for i in range(10):
16             p = Process(target=add,args=(dict_f,l,i))
17             p.start()
18             l_lsit.append(p)
19         for i in l_lsit:
20             i.join()
21         print(dict_f)
22         print(l)
23 输出：
24 1
25 0
26 2
27 3
28 5
29 4
30 6
31 7
32 8
33 9
34 {'1': 'hello', 1: 1, 0: 1, 2: 1, 3: 1, 5: 1, 4: 1, 6: 1, 7: 1, 8: 1, 9: 1}
35 [0, 1, 2, 3, 4, 1000, 1000, 1000, 1000, 1000, 1000, 1000, 1000, 1000, 1000]

 

posted @ 2020-04-23 00:51  竹石2020  阅读(132)  评论(0)  编辑  收藏  举报