day3-python 登录

import datetime
# 1、
f = open('users')
result = f.read()
f.close()
user_list = result.split()  #
user_dic = {}
for user in user_list:
    username,password = user.split(',')
    user_dic[username] = password



for i in range(3):
    username = input('请输入用户名：').strip()
    # password = getpass.getpass('请输入密码：').strip()
    password = input('请输入密码：').strip()
    if username == '' or password == '':
        print('账号/密码不能为空')
    elif username not in user_dic:
        print('用户名不存在')
    elif password == user_dic.get(username):
        print('%s欢迎登陆，今天的日期是%s'%(username,datetime.datetime.today()))
        break
    else:
        print('账号/密码错误！')
else:
    print('错误次数过多！')