Trying to make a decorator to make triggers lazily

trigger_decorator.py

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


class trigger(object):
    """Make a trigger from a method outside of your class's __init__."""
    def __init__(self, func):
        self.func = func

    def __get__(self, instance, owner=None):
        if instance is None:
            # EventDispatcher iterates over its attributes before it instantiates.
            # Don't try making any trigger in that case.
            return
        if not hasattr(self, '_trig'):
            self._trig = Clock.create_trigger(
                partial(self.func, instance), 0
            )
        return self._trig


class Salad(EventDispatcher):
    def toss(self, *args):
        pass
    _trigger_toss = trigger(toss)
    
    @trigger
    def _trigger_serve(self, *args):
        # for when a method should only be usable via trigger
        pass