python3 实现用户三次输入错误记录黑名单并对该用户登录锁定-day1

python3 实现用户三次输入错误记录黑名单并对该用户登录锁定.

# Author:student
import getpass  #输入密码时密文，这个输入不能通过pycharm执行
import re
_username = 'justtest'
_password = 'Dell@123'

#print(username,password)
count =0
username = input("username:")
lockfile = []
f = open('lockuser.txt','r',encoding='gbk')
lockfile = f.readline()
f.close()
list = []
for line in open("lockuser.txt"):
    line1 = line.strip('\n')
    list.append(line1)
if username in list:
    print ("is locked")
else:
    while count <=3:
        if count == 3:
            print("you try too many times for the password and your account will locked")
            f = open('lockuser.txt', 'a', encoding='utf-8')
            f.write(username+"\n")
            f.close()
            break
        else:
            #password = getpass.getpass("password")
            password = input("password:")
            if _username == username and _password == password:
                print("Welcome user {name} login....".format(name=username))
                break
            else:
                print("Invalid username or password!")
                count +=1