1.商品报价报价练习

products = ['Iphone8',6888],['Macpro',14800],['小米6',2499],['Coffee',31],['Book',80],['Nike',799]
shopping_car = []
while True:
    print('----------商品列表----------')
    for index, p  in enumerate(products):
        print("%s %s   %s"%(index,p[0],p[1]))
    choice = input('输入想要买的商品编号:')
    if choice .isdigit():
        choice = int(choice)
        if choice >=0 and choice < len(products):
            shopping_car.append(products[choice])
            print('added product %s into shopping car'%(products[choice]))
        else:
            print("商品不存在")
    elif choice == 'q': 
        if len(shopping_car) > 0:
            print('-----您已购买以下商品-----')
            for index,p in enumerate(shopping_car):
                print("%s %s  %s"%(index,p[0],p[1]))
        break