类2

ss Student(object):
    def get_score(self):
        return self._score
    def set_score(self, value):
        if not isinstance(value, int):
            raise ValueError('score must be an integer')
        if value < 0 or value > 100:
            raise ValueError('score must between 0 ~ 100')
        self._score = value
s = Student()
s.set_score(50)
print(s.get_score())

class Student(object):
    def __init__(self):
        self._score = 0
    @property
    def score(self):
        return self._score
    @score.setter
    def score(self, value):
        if not isinstance(value, int):
            raise ValueError('score must be an integer')
        if value < 0 or value > 100:
            raise ValueError('score must between 0-100')
        self._score = value
s = Student()
s.score = 60
print(s.score)

class Screen(object):
    pass
class Screen(object):
    @property
    def width(self):
        return self._width
    @property
    def height(self):
        return self._height
    @width.setter
    def width(self, value):
        if not isinstance(value, int):
            raise ValueError('score must be an integer')
        if value < 0 or value > 100:
            raise ValueError('score must between 0-100')
        self._width = value
    @height.setter
    def height(self, value):
        if not isinstance(value, int):
            raise  ValueError('score must be an integer')
        if value < 0 or value > 100:
            raise ValueError('score must between 0-100')
        self._height = value
    @property
    def resolution(self):
        self._resolution = 1000
        return self._resolution
sc = Screen()
print(sc.resolution)

sc.height = 100
sc.width = 50
print(sc.height)
print(sc.width)