python把方法变成属性调用

# encoding: utf-8
# @file: property.py
# @software: PyCharm
# @time: 2022/8/9 23:40
# @desc: 方法变成属性调用
"""
装饰器（decorator）可以给函数动态加上功能,对于类的方法，装饰器一样起作用。
Python内置的@property装饰器就是负责把一个方法变成属性调用的：
@property:把一个getter方法xxx(无入参)变成属性
@xxx.setter:负责把一个setter方法(有入参)变成属性赋值
"""
class Screen(object):

    # 读属性
    @property
    def width(self):
        return self.value_width

    # 写属性
    @width.setter
    def width(self, value):
        self.value_width = value

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

    @height.setter
    def height(self, value):
        self.value_height = value

    @property
    def resolution(self):
        return self.value_height * self.value_width


if __name__ == '__main__':
    s = Screen()
    # 方法s.width()只能以属性来赋值
    s.width = 3
    s.height = 4
    # 方法s.width()只能能属性来调用了
    print(s.width, '---', s.height)
    assert s.resolution == 1, '错误，3 * 4 != 1'


#######################################################
# 3 --- 4
# Traceback (most recent call last):
#   File "D:studypri_testproperty.py", line 45, in 
#     assert s.resolution == 1, '错误，3 * 4 != 1'
# AssertionError: 错误，3 * 4 != 1