Self Referencing Class Definition in python

Question

is there any way to reference a class name from within the class declaration? an example follows:

class Plan(SiloBase):
    cost = DataField(int)
    start =         


        

Answer 1

One can do this with the following code in python3. We use cached_property to only evaluate the Player.enemyPlayer once and then return the cached result. Because our value comes from a function, it is not evaluated when the class is first loaded.

class cached_property(object):
    # this caches the result of the function call for fn with no inputs
    # use this as a decorator on function methods that you want converted
    # into cached properties
    def __init__(self, fn):
        self._fn = fn

    def __set_name__(self, owner, name):
        # only works in python >= 3.6
        self.name = name
        self._cache_key = "_" + self.name

    def __get__(self, instance, cls=None):
        if self._cache_key in vars(self):
            return vars(self)[self._cache_key]
        else:
            result = self._fn()
            setattr(self, self._cache_key, result)
            return result


class Player:
    @cached_property
    def enemyPlayer():
        return Player