Python列表和字典的简单实操例子

 # coding=utf-8
 name_l = []
 passwd_l = []
 money_l = []
 goods = {}
 index = 0
 def input_user():
     print("输入个人信息：")
     while True:
         name = input("name: ")
         if  name == "结束！":
             break
         passwd = input("passwd: ")
         money = float(input("money: "))
         name_l.append(name)
         passwd_l.append(passwd)
         money_l.append(money)

 def login():
     print("登录：")
     suc = False
     while not suc:
         name = input("name: ")
         if name not in name_l:
             print("用户名不存在")
             continue
         passwd = input("passwd: ")

         global index
         index = name_l.index(name)
         if passwd == passwd_l[index]:
             print("登录成功")
             suc = True
         else:
             print("密码错误")

 def input_goods():
     print("商品：")
     while True:
         name_goods = input("goods_name: ")
         if name_goods == "结束！":
             break
         price = input("price: ")
         goods[name_goods] = int(price)

 def input_buy():
     print("购买：")
     while True:
         name_goods = input("buy_goods_name: ")
         if name_goods not in goods:
             print("商品不存在！")
             continue
         amount = int(input("amount: "))
         if money_l[index] < goods[name_goods] * amount:
             print("余额不足")
             break
         else:
             money_l[index] -= goods[name_goods] * amount
             print("购买成功", "余额%f" % money_l[index])

 input_user()
 input_goods()
 login()
 input_buy()