Python 学习 --简单购物车程序

#_author:"Jack Ma"
#date: 2017/11/12

Goods_list = [
    ("xiaomi note 3",2500),
    ("xiaomi pro",7000),
    ("xiaomi hands",150),
    ("xiaomi eraphone",120),
    ("xiaomi notebooks",50)
]
shopping_list = []
salary = input("请输入您的工资：")
if salary.isdigit():
    salary = int(salary)
    while True:
        for index,item in enumerate(Goods_list,1):
            print(index,item)
        choicegoods = input("请输入您选择的商品编号：")
        if choicegoods.isdigit():
            choicegoods = int(choicegoods)
            if choicegoods < len(Goods_list) and choicegoods >= 0 :
                p_item = Goods_list[choicegoods - 1]
                if p_item[1] < salary:
                    salary -= p_item[1]
                    shopping_list.append(p_item)
                    print("已将%s放入您的购物车，余额为:%s"%(p_item,salary))
                else:
                    print("您的余额不足，还剩%s"%salary)
            else:
                print("您输入的编号不存在！")
        elif choicegoods == 'quit':
            print("--------您购买的商品如下-------")
            print("商品名           单价")
            for item in shopping_list:
                 print(item)
            print("您还剩%s元钱！"%salary)
            print("欢迎您下次光临！")
            break
else:
    print("请输入您的工资：")