Trying to make a decorator to make triggers lazily

trigger_decorator.py

from kivy.event import EventDispatcher
from kivy.clock import Clock


# this works fine
class Burger(EventDispatcher):
    def flip(self, *args):
        pass

    @property
    def _trigger_flip(self):
        if not hasattr(self, '_real_trigger_flip'):
            self._real_trigger_flip = Clock.create_trigger(self.flip)
        return self._real_trigger_flip


# this keeps triggering the method on unexpected objects,
# including many that shouldn't have the method at all, eg. floats
def get_trigger(obj, fun):
    n = '_real_trigger_' + fun.__name__
    if not hasattr(obj, n):
        setattr(obj, n, Clock.create_trigger(fun))
    return getattr(obj, n)

trigger = lambda fun: property(fget=lambda self: get_trigger(self, fun))

class Fries(EventDispatcher):
    def fry(self, *args):
        pass
        
    _trigger_fry = trigger(fry)