python的购物车实例

#Author:donghuiya

product_list=[
    ('iphone',5800),
    ('Mac Pro',9800),
    ('Bike',800),
    ('Watch',10600),
    ("Coffee",31),
    ('Alex Python',120),
]
shopping_list=[]
salary=input("Input your salary:")
if salary.isdigit():
    salary=int(salary)
    while True:
        for index,item in product_list:
            print(index,item)
        user_choice=input("您要买什么：")
        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 in your shopping cart,your current balance is \033[31;1m%s\033[0m"%(p_item,salary))
                else:
                    print("\033[41;1m您的余额只剩[%s]了，余额不够哦\033[0m")
            else:
                print("product code %s is not exist!"%user_choice)
        elif user_choice=='q':
            print("--------------shopping list------")
            for i in shopping_list:
                print(i)
            print("Your current balance:",salary)
            exit()
        else:
            print("invalid option")