写的不仅仅是“你好”

如果我的理解是正确的，那么文档中的此示例只能写一次“ hello”：

from twisted.internet.protocol import DatagramProtocol
from twisted.internet import reactor

class Helloer(DatagramProtocol):

    def startProtocol(self):
        host = "192.168.1.1"
        port = 1234

        self.transport.connect(host, port)
        print "now we can only send to host %s port %d" % (host, port)
        self.transport.write("hello") # no need for address

    def datagramReceived(self, data, (host, port)):
        print "received %r from %s:%d" % (data, host, port)

    # Possibly invoked if there is no server listening on the
    # address to which we are sending.
    def connectionRefused(self):
        print "No one listening"

# 0 means any port, we don't care in this case
reactor.listenUDP(0, Helloer())
reactor.run()

我有一些疑问：

1. 收到数据报后写“ hello”的好方法是什么？打电话startProtocol()的datagramReceived()？

2. 假设在接收到数据报之后要写入另一个消息，例如“有人在家吗？”。是否应该AnyoneHome(DatagramProtocol)实施课程？但是，如何将它“链接”到Helloer反应堆并连接到反应堆呢？

谢谢