Chapter 12 The second question

#_author:来童星
#date:2019/12/13
from datetime import datetime
class medicine:
    name=''
    price=0
    PD=''
    Exp=''
    def __init__(self,name,price,PD,Exp):
        self.name=name
        self.price=price
        self.PD=PD
        self.Exp=Exp
    @property
    def get_name(self):

        return self.name
    @property
    def get_GP(self):
        start=datetime.strptime(self.PD,'%Y-%m-%d')
        end=datetime.strptime(self.Exp,'%Y-%m-%d')
        return (end-start).days
m=medicine('格列宁',8000,'2019-5-31','2020-6-30')

print(format(m.get_name),format(m.get_GP))


The result: 
Ge Liening 396