from twisted.internet import reactor, protocol
import cPickle
class DD(protocol.Protocol):
    def connectionMade(self):
        print '%s connection made' % self.transport.client[0]
    def dataReceived(self, data):
        print '%s data received' % self.transport.client[0]
        hello = cPickle.loads(data)
        self.transport.write(cPickle.dumps(hello+'1'))
        self.transport.write(cPickle.dumps(hello+'2'))
    def connectionLost(self, reason):
        print '%s connection lost' % self.transport.client[0]
if __name__ == '__main__':
    factory = protocol.ServerFactory()
    factory.protocol = DD
    reactor.listenTCP(2222, factory)
    reactor.run()

from twisted.internet import reactor, protocol
import cPickle
class DDClient(protocol.Protocol):
    def connectionMade(self):
        print 'connection made'
        self.transport.write(cPickle.dumps('hello'))
    def dataReceived(self, data):
        print 'data received'
        print cPickle.loads(data)
        print data
    def connectionLost(self, reason):
        print 'connection lost'
if __name__ == '__main__':
    factory = protocol.ClientFactory()
    factory.protocol = DDClient
    reactor.connectTCP('localhost', 2222, factory)
    reactor.run()

    def dataReceived(self, data):
        print 'data received'
        out = StringIO.StringIO(data)
        print cPickle.load(out)
        print cPickle.load(out)
        out.close()
        print data