from typing import Callable

subscribers = dict()


def subscribe(event_type: str, fn: Callable):
    if not event_type in subscribers:
        subscribers[event_type] = []

    subscribers[event_type].append(fn)


def post_event(event_type: str, **kwargs):
    if not event_type in subscribers:
        return

    for fn in subscribers[event_type]:
        fn(**kwargs)