PYTHON 购物车程序

product_list = [

    ('iphone',50000),

    ('Mac Pro',9900),

    ('Bike',8000),

    ('Watch',160000),

    ('Coffee',600),

    ('lqgyc',1200)

]

shopping_list = []

salary = input("请输入工资:")

if salary.isdigit():  # isdigit() 方法检测字符串是否只由数字组成

    salary = int(salary)

    while True:

        for index,item in enumerate(product_list):

            print(index,item)

        user_choice = input("请选择商品>>>")

        if user_choice.isdigit():

            user_choice = int(user_choice)

            if user_choice < len(product_list) and user_choice >= 0:

                p_item = product_list[user_choice]

                if p_item[1] <= salary:

                    shopping_list.append(p_item)

                    salary -= p_item[1]

                    print("Added %s into shopping cart,your current balar:",salary)

                else:

                    print("你的余额只剩[%s]啦,无法购买"% salary)

            else:

                print("product code [%s] is not exist !" % user_choice)

        elif user_choice == 'q':

            print('---商品列表！---')

            for p in shopping_list:

                print(p)

            print("your current balance:", salary)

            exit()

        else:

            print("请输入商品序列号！")