Writing a login interface using Python

Demand:

Writing the Login interface

Enter User name password

Show welcome message after successful authentication

Lock after entering three times

User Information file

Blacklist of files

Blacklist check, do not let login

User name Password determination

Flow chart:

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Code:

#!/usr/bin/env pythontries = 0lockfile = open (' Account_lock.txt ', ' r+ ', encoding= ' UTF-8 ') Tolockfile = open (' Account_lock.txt ', ' a ', encoding= ' UTF-8 ') userfile = open (' Account.txt ', ' R ', encoding= ' Utf-8 ') Def islock (account):     for line in lockfile:         line = line.strip (' \ n ')          if line == account:             print (' This account is locked ')              exit () Def inaccount (account):    for line in userfile:         col1_user,col2_pass = line.strip (). Split ()          if col1_user == account:             p asstries = 0            while  passtries < 3:                 pass1 = input (' Please enter your password: ')                  if col2_pass == pass1:                    print (' Welcome ')                     exit ()                 else:                     passtries +=1            else:                  tolockfile.write ('%s\n '  % (account))                  print (' account is locked! ')                 exit ()          else:             print (' This account does not exist ')             breakwhile  tries<3:    account = input (' Please enter account: ')     islock ( account)     inaccount (account)     tries +=1else:     print (' This user does not really exist  88 ')     exit () Lockfile.close () Userfile.close () Tolockfile.close () # with open (' Account_lock.txt ', ' a ', encoding= ' UTF-8 ')  as data:   #     data.write ("AAA")    #此方法可以方式忘记文件close #tolockfile = open (' account_lock.txt ', ' a ', encoding= ' UTF-8 ') #open文件后进行追加至最后一行 

This article is from the "Open World" blog, so be sure to keep this source http://voidyao000.blog.51cto.com/12458042/1903626

Writing a login interface using Python