python之路——小购物车程序

程序说明：
程序运行开始会要求用户输入自己的薪水，然后进去挑选商品界面，挑选完毕后，在该界面可以输入“quit”退出程序并进行结算。

# Author: Nickgoods = [[1, 'Iphone', 5800],         [2, 'mac pro', 120000],         [3, 'start_buck', 31],         [4, 'teals', 500000]]cart = []your_money = int(input('please input your salary:'))while True:    print('------goods-----------')    for item in goods:        print(item)    print('input "quit" exit shopping')    goods_code = input('please input good code: ')    if goods_code == 'quit':        print('you select goods is: ', cart)        sum_price = 0        for item in cart:            sum_price += item[2]        print('goods sum price is:  ',sum_price)        if your_money < sum_price:            print('money is small')        else:            print('your balance is',your_money - sum_price)        exit()    goods_code = int(goods_code)    if 0 <= goods_code-1 < len(goods):        cart.append(goods[goods_code-1])    else:        print('input goods code invalidate')