t.py

from twisted.internet import reactor, protocol 

class EchoClient(protocol.Protocol): 
    def connectionMade(self): 
        reactor.callLater(0, self.send_data, "1111") 

    def send_data(self, data): 
        self.transport.write(data) 
        reactor.callLater(0, self.send_data, "1111") 

    def dataReceived(self, data): 
        print "Server said:",data 
        # self.transport.loseConnection() 

def connectionLost(self, reason): 
    print "connection lost"