python 练习购物车小程序

# -*- coding:utf-8 -*-
shp = [
    ['iphone',5000],
    ['offee',35],
    ['shoes',800]
]
pric_list = []
e = int(raw_input("请输入账户金额:"))
while True:
    for i,p in enumerate(shp):
        print i,p[0],p[1]
    enther = raw_input("请输入要购买的商品序号:").strip()
    if enther.isdigit():
        enther = int(enther)
        #p_price = products[choice][1]
        pric = shp[enther][1]
        if pric <= e:
            pric_list.append(shp[enther])
            e -= pric
            print "您购买的%s已添加到购物车，剩余金额%s" %(shp[enther][0],e)
        else:
            print "金额不足，请重新选择，剩余金额%s" % e
    elif enther == 'quit':
        print "购买的商品列表"
        for k,v in enumerate(pric_list):
            print k,v
            print "剩余金额为%s" % e
        print "-----欢迎再次光临------"
        break

实现了输入金额后购买商品直到金额不足