编写登录接口

# -*- coding:utf-8 -*-

# Author:WuGui Xiao

import getpass,sys,re

_username = "xiaowugui"
_password = "Test123"

def user_login(_username,_password):

    for i in range(3):
        '''
            getpass.getpass() -- 显示提示字符串，关闭键盘屏幕回显，然后读取密码  --- 加密（在交互式命令行中使用）
        '''
        username = input("please enter username:")
        password = getpass.getpass("Please enter password:")

        # 写入
        with open(r"../student.txt",'a+',encoding="utf-8") as addUser:
            addUser.write(username+"\n")

        if username == _username and password == _password:
            print(f"Welcome user {username} login success!!")
            sys.exit()
        else:
            # 读取用户名后，再统计username出现的次数
            with open(r"../student.txt", 'r', encoding="utf-8") as readUser:
                words = readUser.read()
                total = len(re.findall(username, words))
                if total >= 3:
                    print("User has been locked for 30 seconds..!")
                else:
                    print("wrong user name or password.")

user_login(_username,_password)