gistfile1.py

import SocketServer
SocketServer.TCPServer.allow_reuse_address = True


class PingHandler(SocketServer.StreamRequestHandler):
    """
    Simple ping service.

    Dziedziczysz po StreamRequestHandler i potem mozesz robic
    self.rfile.readline().
    """

    def handle(self):
        while 1:
            data = self.rfile.readline().strip()
            if data == "ping":
                self.wfile.write("pong\n")
            else:
                break


if __name__ == "__main__":
    HOST, PORT = "localhost", 9999

    server = SocketServer.TCPServer((HOST, PORT), PingHandler)

    server.serve_forever()

Nice. Thx.