用另一种方式完成购物车的功能实现

#!/usr/bin/python

zijin = input("请输入资金：")

if zijin.isdigit():

zijin = int(zijin)

else:

print("请输入数字！")

exit_flag = False

print("欢迎来到本人的购物小店".center(40,"-"))

shop_list = [

("电脑", 1999),

("鼠标", 800),

("键盘", 299),

("鼠标垫", 100)

]

gouwuche = []

xiaofei = 0

while exit_flag is not True:

print("商品列表如下：".center(44,"-"))

for item in enumerate(shop_list):

index = item[0]

sp_name = item[1][0]

sp_price = item[1][1]

print(index, ".", sp_name, sp_price)

user_choice = input("请输入商品编号进行购买：")

if user_choice.isdigit():

user_choice = int(user_choice)

if user_choice < len(shop_list):

sp_item = shop_list[user_choice]

if sp_item[1] <= zijin:

gouwuche.append(sp_item)

zijin -= sp_item[1]

xiaofei += sp_item[1]

print("您成功购买了：[%s] 花费了：[%s] 余额为：[%s]" %(sp_item[0], sp_item[1], zijin))

else:

print("您的金额不足！还差 [%s] 才能购买此商品！" %(sp_item[1] - zijin))

else:

if user_choice == "q" or user_choice == "quick":

print("您本次购买了如下商品：".center(40, "-"))

for g_list in gouwuche:

print(g_list)

print("结束".center(45, "-"))

print("您总共消费了：[%s] 余额为：[%s]" %(xiaofei, zijin))

exit_flag = True