class Robot:

    def __init__(self, name, build_year, lk=0.5,
                 lp=0.5):
        self.name = name
        self.build_year = build_year
        self.__potential_physical = lk
        self.__potential_psychic = lp

    @property
    def condition(self):
        s = self.__potential_physical + self.__potential_psychic
        if s <= -1:
            return "I feel miserable!"
        elif s <= 0:
            return "I feel bad!"
        elif s <= 0.5:
            return "Could be worse!"
        elif s <= 1:
            return "Seems to be okay!"
        else:
            return "Great!"

    def printer(self):
        return self.condition

    def __get__(self, instance, owner):
        return 'get'


x = Robot("Marvin", 1979, 0.2, 0.4)
y = Robot("Caliban", 1993, -0.4, 0.3)