def __get__(self, obj, objtype):
        return functools.partial(self.__call__, obj)
Return list of challenge preferences.
dataset/ETHPy150Open django-leonardo/django-leonardo/leonardo/utils/memoized.py/widget_memoized.__get__--crossover with--dataset/ETHPy150Open letsencrypt/letsencrypt/certbot/interfaces.py/IAuthenticator.get_chall_pref