shangp = [["铅笔", 2],

["本子", 5],

["圆珠笔", 4],

["签字笔", 6],

["草稿", 3],

["橡皮擦", 2]]

xuanzhe = {}

huafei = 0

while True:

choice = input("输入你所选择的商品编号>>:").strip()

if choice.isdigit():

choice = int(choice)

if choice < len(shangp) and choice >= 0:

product = shangp[choice]

if product[0] in xuanzhe:

xuanzhe[product[0]][1] += 1

else:

xuanzhe[product[0]] = [product[1], 1]

print("购物车", xuanzhe)

elif choice == "buy":

print("---------你购买的商品如下---------")

print("id", "\t", "商品", "\t", "数量", "\t", "单价", "\t", "总价")

id_counter = 1

for key in xuanzhe:

print(id_counter, "\t",

key, "\t",

xuanzhe[key][1], "\t\t",

xuanzhe[key][0], "\t",

xuanzhe[key][1] * xuanzhe[key][0])

id_counter += 1

huafei+= xuanzhe[key][1] * xuanzhe[key][0]

print("总计价格为", huafei)

print("------------end------------")

break

else:

print("请输入正确的编号！")