管道

from multiprocessing import Pipe,Process      #不如队列安全

def func(conn1,conn2):
    conn2.close()              #在子进程关闭conn2
    while True:
        try:
            msg=s=conn1.recv()
            print(msg)
        except EOFError:            #捕获异常，结束程序，不然会一直阻塞
            conn1.close()   
            break


if __name__=='__main__':
    conn1, conn2 = Pipe()
    Process(target =func,args=(conn1,conn2)).start()
    conn1.close()
    for i in range(20):
        conn2.send('你好')
    conn2.close()               #在主进程关闭conn2，关闭后在读数据会抛出异常