import sockethost = ''port = 55555myServerSocket = socket.socket(socket.AF_INET, socket.SOCK_STREAM)myServerSocket.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR,1)myServerSocket.bind((host, port))myServerSocket.listen(1)print "Server is running on port %d; press Ctrl-C to terminate." % portwhile 1:  clientsock, clientaddr = myServerSocket.accept()  clientfile = clientsock.makefile('rw', 0)  clientfile.write("Welcome, " + str(clientaddr) + "/n")  clientfile.write("Please enter a string: ")  line = clientfile.readline().strip()  clientfile.write("You entered %d characters./n" % len(line))  clientfile.close()  clientsock.close()