python
#server
import  socket

host=''
port=21567
addr=(host,port)

sercli=socket.socket(socket.AF_INET,socket.SOCK_STREAM) #TCP连接
sercli.bind(addr)
sercli.listen(5)

while True:
    print('等待连接...')
    clicli,addr=sercli.accept()
    print('{}连接'.format(addr))

    while True:
        info=clicli.recv(1024)
        if not info:
            break
        print('来自于客户说：{}'.format(info))
        re=input('你说：') #python2.7用raw_input
        clicli.send(re.encode('utf-8'))
    clicli.close()
sercli.close()

#client
import socket

host='192.168.132.1' #服务端IP
port=21567
addr=(host,port)

clicli=socket.socket(socket.AF_INET,socket.SOCK_STREAM)
clicli.connect(addr)
while True:
    info=input('你说：')
    clicli.send(info.encode('utf-8'))
    re=clicli.recv(1024)
    if not re:
        break
    print('主机说：{}'.format(re))
clicli.close()