Python uses pipes to realize data transfer between processes

from multiprocessing import Process, Pipe

def f(conn):
    conn.send('Hello World!')    #向管道中发送数据
    conn.close()

if __name__ == '__main__':
    conn_A, conn_B = Pipe()          #创建管道对象
    p = Process(target=f, args=(conn_A,)) #将管道的一方给子进程
    p.start()
    p.join()
    print("Received message:",conn_B.recv())   #通过管道的另一方获取数据