python最简单的账号密码验证_Python之简单的用户名密码验证

#Author jack

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

#date 2019-08-14

'''

作业一：编写登录接口

输入用户名密码

认证成功后显示欢迎信息

输错三次后锁定

'''

#判断用户账号密码

def check_pass(username, password):

with open('userfile.txt', 'r+') as f:

content = f.readlines()

for i in content:

if i.split(',')[0] == username and i.split(',')[1].strip('\n') == password:

return True

break

else:

return False

#判断用户名是否锁定:

def isLock(username):

with open('locklist.txt', 'r') as f:

cont = f.read()

if username in cont:

return False

else:

return True

#写锁定用户名到locklist，如果用户输错三次，就调用此函数，讲锁定的用户名写入此文件

def writeErrlist(username):

with open('locklist.txt', 'a+') as f:

f.write(username)

f.write('\n')

def main():

count = 0 #存储输密码次数

while count < 3:

username = input('Please input your username: ')

is_lock = isLock(username)

if is_lock:

passwd = input('Please input your password: ')

result = check_pass(username, passwd)

if result:

print('welcome back! "{}"'.format(username))

break

else:

count += 1

if count < 3:

print('Invalid username or password, Please try again!')

else:

print('Too many attempts, Your account has benn locked.')

writeErrlist(username)

else:

print('Your account has been locked!!!')

if __name__ == "__main__":

main()