服务端：

#!/usr/bin/env python
# -*- encoding: utf-8 -*-
 
# @File  :   servers.py
# @Author  :   王韧锋
# @Modify Time  :   2019/12/3 16:03
# @Version  :   1.0
# @Desciption  :   服务端程序
import socket
import threading
import time
 
 
def tcplink(sock, addr):
    print("Accept new connection from %s:%s..." % addr)
    sock.send(b'Welcome!')
    while True:
        data = sock.recv(1024)
        time.sleep(1)
        if not data or data.decode('utf-8') == 'exit':
            sock.send("GoodBye".encode('utf-8'))
            break
        sock.send(('Hello, %s!' % data.decode('utf-8')).encode('utf-8'))
    sock.close()
    print('Connection from %s:%s closed.' % addr)
 
 
# 创建一个socket
s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
# 监听端口
s.bind(('127.0.0.1', 9999))
s.listen(5)
print("等待连接。。。。")
# 永久循环来接受来自客户端的连接
while True:
    # 接受一个新连接
    sock, addr = s.accept()
    # 创建新线程来处理
    t = threading.Thread(target=tcplink, args=(sock, addr))
    t.start()

 客户端：

#!/usr/bin/env python
# -*- encoding: utf-8 -*-
 
#@File  :   client.py    
#@Author  :   王韧锋
#@Modify Time  :   2019/12/3 16:16  
#@Version  :   1.0
#@Desciption  :   None
import socket
 
s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
# 建立连接:
s.connect(('127.0.0.1', 9999))
# 接收欢迎消息:
print(s.recv(1024).decode('utf-8'))
for data in [b'Michael', b'Tracy', b'Sarah',b'Sarah',b'Sarah',b'Sarah',b'Sarah',b'Sarah',b'Sarah',b'Sarah',b'Sarah',b'Sarah']:
    # 发送数据:
    s.send(data)
    print(s.recv(1024).decode('utf-8'))
s.send(b'exit')
print(s.recv(1024).decode('utf-8'))
s.close()