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