構建一個商品類，__init__函數類似於構造方法，self類似於this

import random
class Goods:
    def __init__(self, name, price):
        self.name = name
        self.price = price

    def changeprice(self, m, n):
        self.price = random.randint(m, n)
        return self.price

再寫一個商店類，用於存放商品

class Gshop:
    goodslist = []
    def __init__(self, g):
        self.goodslist.append(g)

    def add(self, g):
        self.goodslist.append(g)

    def changegoodslistprice(self):
        for w in self.goodslist:
            w.changeprice(20, 50)
            print(w.name, w.price)
 

實例化對象，執行對象的方法

import goods,gshop
toy = goods.Goods(‘洋娃娃‘, 30)
gshopdemo = gshop.Gshop(toy)
#print(toy.name, toy.price)

car_wlhg = goods.Goods(‘五菱宏光‘, 30000)
gshopdemo.add(car_wlhg)
gshopdemo.changegoodslistprice()

運行結果：

python之類和__init__