import socket

sock = socket.socket()
sock.bind(("127.0.0.1",8899))
sock.listen(5)

while True:
    print("server is waiting...")
    client_sock, client_addr = sock.accept()
    print(client_addr, client_sock)
    while True:
        data = client_sock.recv(1024)
        print(‘收到消息:‘ + data.decode())
        if data == b‘q‘:
            break
        res = input(‘输入>>>‘).encode()
        client_sock.send(res)

import socket

sock = socket.socket()
sock.connect(("127.0.0.1",8899))

while True:
    data = input(‘输入>>>‘).encode()
    sock.send(data)
    if data == b‘q‘:
        break
    res = sock.recv(1024).decode()
    print(‘收到消息：‘ + res)

sock.close()