twisted test | Python Fiddle

from twisted.internet import protocol, reactor

class Echo(protocol.Protocol):
    def dataReceived(self, data):
        self.transport.write(data)
        
        
class EchoFactory(protocol.Factory):
    def buildProtocol(self, addr):
        return Echo()
        
reactor.listenTCP(8000, EchoFactory())
reactor.run()

from twisted.internet import reactor, protocol
class EchoClient(protocol.Protocol):
    def connectionMade(self):
        self.transport.write("Hello, world!")
        
    def dataReceived(self, data):
        print "Server said:", data
        self.transport.loseConnection()
        
        
class EchoFactory(protocol.ClientFactory):
    def buildProtocol(self, addr):
        return EchoClient()
        
    def clientConnectionFailed(self, connector, reason):
        print "Connection failed."
        reactor.stop()
        
    def clientConnectionLost(self, connector, reason):
        print "Connection lost."
        reactor.stop()
        
        
reactor.connectTCP("localhost", 8000, EchoFactory())
reactor.run()

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