# -*- coding: utf-8 -*-
# @Time    : 2020/7/26 14:13
# @Author  : Breeze
# @FileName: 購物車程序.py


product_list = [
    ("Mac",9000),
    ("kindle",800),
    ("tesla",900000),
    ("python book",105),
    ("bike",2000),
]

saving = input("please input your money:")
shopping_car = []
if saving.isdigit():
    saving = int(saving)
    while True:
        #打印商品內(nèi)容
        for i,v in enumerate(product_list,1):
            print(i,">>>>",v)
            # print(product_list.index(i)+1,i)
            #引導(dǎo)用戶選擇商品
        choice = input("選擇購買商品編號[退出：q]：")
        #驗證是否合法
        if choice.isdigit():
            choice = int(choice)
            if choice >0 and choice <= len(product_list):
                #將用戶選擇商品通過choice取出來
                p_item = product_list[choice-1]
                #如果錢夠，用本金saving-該商品價格，并將該商品加入購物車
                if p_item[1]<saving:
                    saving -= p_item[1]
                    shopping_car.append(p_item)
                else:
                    print("余額不足，還剩%s"%saving)
                print(p_item)

            else:
                print("編碼不存在")
        elif choice == 'q':
            print("--------您已購買以下商品--------")
            #循環(huán)遍歷購物車?yán)锏纳唐?，購物車存放的是已買商品
            for i in shopping_car:
                print(i)
            print("您還剩%s元"%saving)
            break
        else:
            print("Invalid input")
else:
    print("must be digit!")