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()