与c/c++ socket编程对照见http://blog.csdn.net/aspnet_lyc/article/details/38946915

server：

import socket

PORT    = 9999

BACKLOG = 5

MAXLINE = 1024

listenfd = socket.socket(socket.AF_INET,socket.SOCK_STREAM)

listenfd.bind(('',PORT))

listenfd.listen(BACKLOG)

while True:

	connfd, connaddr = listenfd.accept()

	print 'a new connection'

	buf = []

	buf = connfd.recv(MAXLINE)

	print buf

	connfd.send('Hello,this is server')

	connfd.close()

client:

import socket

addr = '127.0.0.1'

port = 9999

sockfd = socket.socket(socket.AF_INET, socket.SOCK_STREAM)

sockfd.connect((addr, port))

sockfd.send('Hello,this is client')

buf = []

while True:

	recv_data = sockfd.recv(1024)

	if recv_data:

		buf.append(recv_data)

	else:

		break

data = ''.join(buf)

print data

sockfd.close()