mini购物车程序

product_list=[("Iphohe",5800),("Mac Pro Book",12900),
              ("xiaomi 4c",1200),("Alex python",120),
              ("Bike",800)]
shopping_list=[]
salary=input("input your salary:")
if salary.isdigit():
    salary=int(salary)

else:
    print("您的输入有误，请重新输入")

    while True:
        for index,shangpin in enumerate(product_list):
            print(index,shangpin)

        user_choice=input("选择要买啥？>>>")
        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: #买得起
                    shopping_list.append(p_item)
                    salary-=p_item[1]
                    print("Added %s into shopping cart,your current balance is \033[32;1m%s\033[0m"%(p_item,salary))
                else:
                    print("your current balance is\033[31;1m%s\033[0m,信仰不足，请充值"%(salary))
        elif user_choice=='q':
　　　　　　　print('______shopping list______')
　　　　　　　for a in shopping_list:

　　　　　　　print(a)
            print("your current balance is\033[31;1m%s\033[0m,谢谢使用"%(salary) )
            exit()
        else:
            print("invalid option")