设计一个Shop 类，类中的属性包括商品名字的列表，names = [“caffee”, “water”, “apple”, “milk”], 价格列表 price = [5.0, 2.0, 3.5, 11.5] ，类中包含方法一shopInfo，打印每件商品的名字和对应价格，方法二 allProduct，求出所有商品的价格总和，并打印出来。
在主程序中创建Shop类对象，调用方法一、方法二
class Shop(object):
def __init__(self):
self.names = ["caffe", "water", "apple", "milk"]
self.prices = [5.0, 2.0, 3.5, 11.5]
def shopInfo(self):
for name, price in zip(self.names, self.prices):
print(f"{name} {price}")
def allProduct(self):
sum = 0.0
for price in self.prices:
sum += price
print(f"Total price: {sum}")
def main():
shop = Shop()
shop.shopInfo()
shop.allProduct()
if __name__ == "__main__":
main()
就这一题而言，使用类属性和成员属性对结果没有影响
class Shop():
names = ["caffee", "water", "apple", "milk"]
price = [5.0, 2.0, 3.5, 11.5]
def shopInfo(self):
for n, p in zip(Shop.names, Shop.price):
print(f"{n}：{p}")
def allProduct(self):
print(f"所有商品价格总和: {sum(Shop.price)}")
if __name__ == "__main__":
shop = Shop()
shop.shopInfo()
shop.allProduct()