client:

#!/usr/bin/env python#coding:utf-8#author:Bingimport socketclient = socket.socket()ip_port = ("127.0.0.1",9999)client.connect(ip_port)while True:    data = client.recv(1024)    print data        inp = raw_input("data:")    client.send(inp)    if inp == "exit":        break

simple progress:

#!/usr/bin/env python#coding:utf-8#author:Bingimport socketserver = socket.socket()ip_port = ("127.0.0.1",9999)server.bind(ip_port)server.listen(5)while True:     conn,address = server.accept()    conn.send("hello..!")    flag = True    while flag:        data = conn.recv(1024)        print data        if data == "1" :            conn.send("this is test")        elif data == "exit":            flag = False        else:            conn.send("Guess")    conn.close()

multipprogress:

#!/usr/bin/env python#coding:utf-8#author:Bingimport SocketServerclass Myserver(SocketServer.BaseRequestHandler):    def setup(self):        pass        def handle(self):        while True:             conn = self.request            conn.send("hello..!")            flag = True            while flag:                data = conn.recv(1024)                print data                if data == "1" :                    conn.send("this is test")                elif data == "exit":                    flag = False                else:                    conn.send("Guess")            conn.close()        def finish(self):        pass        if __name__ == "__main__":    server = SocketServer.ThreadingTCPServer(("127.0.0.1",9999),Myserver)    server.serve_forever()

simple ftp server: