@classmethod
    def retrieve_checker(cls, checker_name):
        if checker_name in cls._checkers:
            return cls._checkers[checker_name]

        raise CheckerNotRegistered(checker_name % 'Checker with name %s was not registered')
dataset/ETHPy150Open vintasoftware/django-role-permissions/rolepermissions/permissions.py/PermissionsManager.retrieve_checker/swapped operands of `%`