######################################################### 
# Server side: open a socket on a port, listen for
# a message from a client, and send an echo reply;  
# this version uses the standard library module  
# SocketServer to do its work; SocketServer allows
# us to make a simple TCPServer, a ThreadingTCPServer, 
# a ForkingTCPServer, and more, and routes each client 
# connect request to a new instance of a passed-in  
# request handler object's handle method; also supports 
# UDP and Unix domain sockets; see the library manual.
######################################################### 


import SocketServer, time               # get socket server, handler objects
myHost = ''                             # server machine, '' means local host 
myPort = 50007                          # listen on a non-reserved port number 
def now():  
  return time.ctime(time.time()) 
  
class MyClientHandler(SocketServer.BaseRequestHandler):
     def handle(self):                           # on each client connect 
         print self.client_address, now()        # show this client's address 
         time.sleep(5)                           # simulate a blocking activity 
         while 1:                                # self.request is client socket
             data = self.request.recv(1024)      # read, write a client socket
             if not data: break 
             self.request.send('Echo=>%s at %s' % (data, now())) 
         self.request.close()  
  
# make a threaded server, listen/handle clients forever 
myaddr = (myHost, myPort) 
server = SocketServer.ThreadingTCPServer(myaddr, MyClientHandler)
server.serve_forever()    
  

tcp server