如何用加代码可以使TCP客户端的消息发送到TCP服务器上并print出来？

#!/usr/bin/env python

from socket import *

HOST=''
PORT=21567
ADDR=(HOST,PORT)

tcpSerSock=socket(AF_INET,SOCK_STREAM)
tcpSerSock.bind(ADDR)
tcpSerSock.listen(5)

while True:
    print 'waiting for connection...'
    tcpCliSock,addr=tcpSerSock.accept()
    print '...connected from:',addr
    
while True:
    data=tcpCliSock.recv(1024)
    if not data:
        break
    tcpCliSock.send(data)

tcpCliSock.close()
tcpSerSock.close()

#!/usr/bin/env python

from socket import *

HOST='localhost'
PORT=21567
ADDR=(HOST,PORT)

tcpCliSock=socket(AF_INET,SOCK_STREAM)
tcpCliSock.connect(ADDR)

while True:
    data=raw_input('>')
    if not data:
        break
    tcpCliSock.send(data)
    data=tcpCliSock.recv(1024)
    if not data:
        break
    print data

tcpCliSock.close()

这是我的客户端和服务器代码，我不知道如何下手去改，现在就反馈主机序列号