notify <peer> <method> <params>
        send a msgpack-rpc notification.
        <params> is a python code snippet, it should be eval'ed to a list.

def do_notify(self, line):
        """notify <peer> <method> <params>
        send a msgpack-rpc notification.
        <params> is a python code snippet, it should be eval'ed to a list.
        """

        def f(p, method, params):
            p.send_notification(method, params)

        self._request(line, f)