property相关补充

# Author : Kelvin
# Date : 2019/1/25 15:20
class Foo:
    def __init__(self):
        self.original_price = 100
        self.discount = 0.8

    @property
    def price(self):
        new_price = self.original_price * self.discount
        return new_price

    @price.setter
    def price(self, val):
        self.original_price = val

    @price.deleter
    def price(self):
        del self.original_price


f = Foo()
print(f.price)
f.price = 200
print(f.price)
del f.price
print(f.__dict__)

"""输出结果：
80.0
160.0
{'discount': 0.8}
"""