How to use the pykka.ActorProxy function in pykka

def test_proxy_constructor_raises_exception_if_actor_is_dead(actor_class):
    actor_ref = actor_class.start()
    actor_ref.stop()

    with pytest.raises(ActorDeadError) as exc_info:
        ActorProxy(actor_ref)

    assert str(exc_info.value) == '{} not found'.format(actor_ref)

def proxy(actor_class):
    proxy = ActorProxy(actor_class.start())
    yield proxy
    proxy.stop()

def replay_events(self, until=None):
        while True:
            try:
                e = self.events.get(timeout=0.1)
                cls, event, kwargs = e
                if event == until:
                    break
                for actor in self.actor_register:
                    if isinstance(actor, pykka.ActorProxy):
                        if isinstance(actor._actor, cls):
                            actor.on_event(event, **kwargs).get()
                    else:
                        if isinstance(actor, cls):
                            actor.on_event(event, **kwargs)
            except Queue.Empty:
                # All events replayed.
                break

def replay_events(self, until=None):
        while True:
            try:
                e = self.events.get(timeout=0.1)
                cls, event, kwargs = e
                for actor in self.actor_register:
                    if isinstance(actor, pykka.ActorProxy):
                        if isinstance(actor._actor, cls):
                            actor.on_event(event, **kwargs).get()
                    else:
                        actor.on_event(event, **kwargs)
                if e[0] == until:
                    break
            except Queue.Empty:
                # All events replayed.
                break

"""
        Wraps the :class:`ActorRef` in an :class:`ActorProxy
        `.

        Using this method like this::

            proxy = AnActor.start().proxy()

        is analogous to::

            proxy = ActorProxy(AnActor.start())

        :raise: :exc:`pykka.ActorDeadError` if actor is not available
        :return: :class:`pykka.ActorProxy`
        """
        return ActorProxy(self)