socket是一种双向通信的起点和重点，氛围服务器端和客户端
Socket服务器端用到的方法有
| Method | Description |
|---|---|
| s.bind() | This method binds address (hostname, port number pair) to socket. |
| s.listen() | This method sets up and start TCP listener. |
| s.accept() | This passively accept TCP client connection, waiting until connection arrives (blocking). |
Socket客户端用到的方法有
| Method | Description |
|---|---|
| s.connect() | This method actively initiates TCP server connection. |
Socket通用方法有
| Method | Description |
|---|---|
| s.recv() | This method receives TCP message |
| s.send() | This method transmits TCP message |
| s.recvfrom() | This method receives UDP message |
| s.sendto() | This method transmits UDP message |
| s.close() | This method closes socket |
| socket.gethostname() | Returns the hostname. |
下面为一个简单的socket通信的例子，包括了一个socket服务器端监听本地服务器的某一个端口，一个socket的客户端向服务器端发送请求。服务器端接收到请求之后会返回一个消息
socket服务器端
创建了一个简单的socket，绑定在本地服务器的端口上对外提供服务。监听到请求的时候会做出响应
s.listen表示启动监听，监听队列数为5
1 import socket 2 3 #create a socket object,and bind it to the port 4 s=socket.socket() 5 host = socket.gethostname() 6 port = 12345 7 s.bind((host,port)) 8 9 s.listen(5) 10 11 while True: 12 c,addr = s.accept() 13 print ‘Got connectoion from‘,addr 14 c.send(‘thank you from connecting‘) 15 c.close()
socket客户端
import socket s=socket.socket() host = socket.gethostname() port = 12345 s.connect((host,port)) print s.recv(1024) s.close()
原文：http://www.cnblogs.com/alwaysthinking/p/4067976.html