# -*- coding: utf-8-*-
from twisted.internet.protocol import Factory, Protocol
class Ret(Protocol):
    def connectionMade(self):
        print "соединение установлено"
        
    def connectionLost(self, reason):
        print "Соединение разорвано "
    
    def dataReceived(self, data):
        print "Полученные данные", data
        self.writeData(str(data))
            
    def writeData(self, data):
        self.transport.write(data)
    
class MyFactory(Factory):
    protocol = Ret
        
if __name__ == '__main__':
    from twisted.internet import reactor
    reactor.listenTCP(843, MyFactory())
    reactor.run()

# -*- coding: utf-8-*-
from twisted.internet.protocol import Factory, Protocol
class Ret(Protocol):
    def __init__(self, factory):
        self.factory = factory
        
    def connectionMade(self):
        self.factory.numConnections += 1
        
    def connectionLost(self, reason):
        self.factory.numConnections -= 1
    
    def dataReceived(self, data):
        pass
class MyFactory(Factory):
    numConnections = 0
    
    def buildProtocol(self, addr):
        return Ret(self)
if __name__ == '__main__':
    from twisted.internet import reactor
    reactor.listenTCP(8000, MyFactory())
    reactor.run()