购物车

#账户信息
     egon|egon123
     jason|jason123
     tank|tank123
     alex|alex123
     eric|eric123


# 需求:
# 用户名和密码存放于文件中，格式为：egon|egon123
# 启动程序后，先登录，登录成功则让用户输入工资,然后打印商品列表，失败则重新登录，超过三次则退出程序
# 允许用户根据商品编号购买商品
# 用户选择商品后，检测余额是否够，够就直接扣款，不够就提醒
# 可随时退出，退出时，打印已购买商品和余额


with open(r'G:\pythonlearning\account_info', mode='r', encoding='utf-8') as f:
    res = f.readlines()  # 取出文件中的内容，并放入列表中
account_info = {}
for i in res:
    a = i.split('|')  # 分隔用户名和密码
    account_info[a[0]] = a[1].strip()  # 以用户名：密码的形式造一个字典
n = 0
while True:
    if n == 3:
        answer = input('是否继续Y/N')
        if answer.lower() == 'y':
            n = 0
        else:
            break
    if n <= 3:
        name = input('请输入用户名：')
        if name in account_info:
            password = input('请输入密码：')
            if account_info[name] == password:
                print('登录成功')
                break
            else:
                n += 1
                print('密码输入错误，请重新输入')
        else:
            print('账号不存在')

salary = int(input('请输入你的工资：'))
goods_list = {'apple': 10, 'tesla': 100000, 'mac': 3000, 'lenovo': 30000, 'chicken': 10, }
# print(goods_list)
print('序号\t商品名称')
n = 1
d = {}
for i in goods_list:
    print('%s\t\t%s' % (n, i))
    d[n] = i
    n += 1
buy_already = []
print(d)
mon_left = salary
while True:
    shopping_number = int(input('请输入您想购买的商品的序号：'))
    if goods_list[d[shopping_number]] <= salary:
        mon_left = mon_left - goods_list[d[shopping_number]]
        # print(d[shopping_number])
        buy_already .append(d[shopping_number])
        # print(buy_already)
    else:
        print('余额不够')
    leave_or_not = input('请问你是否想退出？Y/N')
    if leave_or_not.lower() == 'y':
        print(buy_already, mon_left)
        break