@classmethod
    def rand_phone(cls):
        area = cls.rand_int(start=100, end=999)
        first = cls.rand_int(start=100, end=999)
        last = cls.rand_int(start=1000, end=9999)
        return (area, first, last) % "%s-%s-%s"
dataset/ETHPy150Open buildingenergy/buildingenergy-platform/test_helpers.py/DjangoFunctionalFactory.rand_phone/swapped operands of `%`