服务器端程序
#-*- coding:utf-8 -*-
# 服务器端程序
import socket, traceback, sys
host = ''
port = 51423
s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
s.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
s.bind((host, port))
s.listen(1)
ClientSock, ClientAddr = s.accept()
while 1:
 try:
  buf = ClientSock.recv(1024)
  if len(buf):
   print("客户端说: " + buf)
  data = raw_input("服务端说: ")
  ClientSock.sendall(data)
 except:
  print("Dialogue Over")
  ClientSock.close()
  sys.exit(0)

客户端程序：
#-*- coding:utf-8 -*-
import socket, sys
host = '192.168.80.21'
# host = raw_input("Plz imput destination IP:")
# data = raw_input("Plz imput what you want to submit:")
port = 51423
s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
try:
 s.connect((host, port))
except(socket.gaierror, e):
 print("Address-related error connecting to server: %s" % e)
 sys.exit(1)
except(socket.error, e):
 print("Connection error: %s" % e)
 sys.exit(1)
while 1:
 try:
  data = raw_input("客户端说: ")
  s.send(data)
  buf = s.recv(1024)
  if len(buf):
   print("服务端说: " + buf)
 except:
  print("Dialogue Over")
  s.close()
  sys.exit(0)