class BaseClass:
     def __init__(self, gui):
         self.gui = gui
         self.drawing = True

    async def draw(self):
        pass
     
     async def dispatch_event(self, event_type, *args, **kwargs):
         try:
            coro =  self.__getattribute__("on_" + event_type)
         except AttributeError:
            pass
         else:
            await coro(*args, **kwargs)


class MainClass(BaseClass):
    async def on_pygame_keydown(self, event):
        print("prout")