进程间通讯-2(pipe)

Posted 2020-10-02 momo8238

通过pipe 管道的方式也可以实现进程间通信。

父进程和子进程之间可以实现相互通信。

from multiprocessing import Process, Pipe

def f(conn):
    conn.send([42, None, ‘hello from child‘])
    conn.send([42, None, ‘hello from child2‘])
    print(‘from parent:‘,conn.recv())
    conn.close()

if __name__ == ‘__main__‘:
    parent_conn, child_conn = Pipe()
    p = Process(target=f, args=(child_conn,))
    p.start()
    print(parent_conn.recv())  # prints "[42, None, ‘hello‘]"
    print(parent_conn.recv())
    parent_conn.send(‘你还好么？‘)
    p.join()

 运行结果：

[42, None, ‘hello from child‘]
[42, None, ‘hello from child2‘]
from parent 你还好么？