class Validator:
    @staticmethod
    def get_name(value, message):
        if value.strip() == "":
            raise ValueError(message)

    @staticmethod
    def get_price(value, message):
        if value <= 0:
            raise ValueError(message)

    @staticmethod
    def get_table_num(value, min_seats, max_seats, message):
        if value not in [min_seats, max_seats]:
            raise ValueError(message)