#!/usr/bin/env python3
# _*_ coding:utf-8 _*_

'面向对象高级编程'
from types import MethodType

__author__ = 'chenguangyue'


# 数据封装、继承、多态是面向对象编程设计中最基础的概念，多重继承、定制类、元类等

class Student(object):
    # __slots__ = ('name', 'age', 'score')  # 用tuple定义允许绑定的属性名称,只对当前类起作用，对子类不起作用

    @property
    def score(self):
        return self._score

    @score.setter
    def score(self, score):
        if not isinstance(score, int):
            raise ValueError('score must be an integer!')
        if score < 0 or score > 100:
            raise ValueError('score must between 0~ 100!')
        self._score = score


s = Student()
s.score = 90

print(s.score)


class Screen(object):

    @property
    def width(self):
        return self._width

    @width.setter
    def width(self, width):
        self._width = width

    @property
    def height(self):
        return self._height

    @height.setter
    def height(self, height):
        self._height = height

    @property
    def resolution(self):
        return self._width * self._height


s = Screen()
s.width = 1024
s.height = 768
print('resolution = ',s.resolution)

# def set_score(self, score):
#     if not isinstance(score, int):
#         raise ValueError('score must be an integer!')
#     if score < 0 or score > 100:
#         raise ValueError('score must between 0 ~ 100!')
#     self.score = score
#
# def get_score(self):
#     return self.score


# def set_age(self, age):
#     self.age = age
#
#
# def set_score(self, score):
#     self.score = score
#
#
# s = Student()
# s.name = 'Michael'
# # s.set_age = MethodType(set_age, s)
# # s.set_age(25)
# print(s.name)
#
# # print(s.age)
#
# Student.set_score = set_score
# s.set_score(88)
# print(s.score)
#
# s2 = Student()
# s2.set_score(99)
# print(s2.score)