nc.py

import argparse

from twisted.internet import reactor, stdio, protocol
from twisted.protocols import basic


class Client(basic.LineReceiver):
    delimeter = '\r\n'.encode('ascii')

    def connectionMade(self):
        print('Connection made.')

    def dataReceived(self, data):
        print(data.strip())


class Factory(protocol.ClientFactory):
    protocol = Client

    def clientConnectionFailed(self, connector, reason):
        print 'Connection failed:', reason.getErrorMessage()
        reactor.stop()

    def clientConnectionLost(self, connector, reason):
        print 'Connection lost:', reason.getErrorMessage()
        reactor.stop()


class IO(basic.LineReceiver):
    delimiter = '\n'

    def __init__(self, host, port):
        self.c = reactor.connectTCP(host, port, Factory())

    def lineReceived(self, line):
        self.c.transport.write(line)


def main():
    parser = argparse.ArgumentParser()
    parser.add_argument('host')
    parser.add_argument('port', type=int)

    arguments = parser.parse_args()

    stdio.StandardIO(IO(arguments.host, arguments.port))

    reactor.run()


if __name__ == '__main__':
    main()