How to avoid nested Futures?

[manmime]

Hello,
I have recently found Pykka and really enjoy playing with it. During my Pykka sessions the following issue emerged:

My application has a RootActor, ManagerActor and EventActor. I need to get a list of information about events, therefore i need to ask each event for its info. The request for the list of information comes from a web api, therefore the result must be returned immediately (or a future). My current solution is as follows:

from pykka import ThreadingActor

GetInfo = object()
ApiRequestListEvents = object()


class EventActor(ThreadingActor):
    def __init__(self, event_id):
        ThreadingActor.__init__(self)
        self.event_id = event_id

    def on_receive(self, message):
        if message is GetInfo:
            return f"My event id is {self.event_id}"


class ManagerActor(ThreadingActor):
    def __init__(self):
        ThreadingActor.__init__(self)
        self.events = [
            EventActor.start(event_id=i)
            for i in range(3)
        ]

    def on_receive(self, message):
        if message is ApiRequestListEvents:
            return self.events[0].ask(GetInfo, block=False).join(
                *[self.events[i].ask(GetInfo, block=False) for i in [1, 2]]
            )


class RootActor(ThreadingActor):
    def __init__(self):
        ThreadingActor.__init__(self)
        self.manager_actor = ManagerActor.start()

    def on_receive(self, message):
        if message is ApiRequestListEvents:
            return self.manager_actor.ask(ApiRequestListEvents, block=False)


root = RootActor.start()
f = root.ask(ApiRequestListEvents)

But because of the nested asks the type of f is Future[Future[Future[List]]]. I somehow need to get rid of the nested Future.

I could maybe not ask the EventActors, but tell them to send their result back to ManagerActor and he would somehow collect the results, send them back to RootActor, but how would he fill them in the future he has no clue about (hidden somewhere in ask() implementation)?

How would you recommend to solve this?
Thanks for help!