socket_client.py
#!usr/bin/env python
# -*- coding:utf-8 -*-
__author__ = "Samson"
#客户端
import socket
client = socket.socket()#声明socket类型，同时生成socket链接对象，默认ipv4，tcp协议
client.connect(("localhost",6969))#建立连接
client.send(b"Hello world!")#python3只能发byte类型，python2可以为字符串
data = client.recv(1024)#收取1024个字节，即1K
print("recv:",data)
client.close()#关闭连接
socket_server.py
#!usr/bin/env python
# -*- coding:utf-8 -*-
__author__ = "Samson"
#服务器端
import socket
server = socket.socket()
server.bind(("localhost",6969))#绑定监听端口
server.listen()#开始监听
print("开始等待!")
conn,addr = server.accept()#等待,其中conn就是客户端连过来而在服务器为其生成一个连接实例
data = conn.recv(1024)
print("recv:",data)
conn.send(data.upper())
server.close()