How to write a login interface using python

This article uses python to write a login interface method

Requirements:

Writing a login interface

Enter the user name and password

After successful authentication Display the welcome message

Lock after three inputs

User information file

Blacklist file

Check in the blacklist and do not allow login

Username and password determination

Flow chart:

Code:

#!/usr/bin/env python
tries = 0
lockfile = 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('此账号已锁定')
            exit()
 
def inaccount(account):
    for line in userfile:
        col1_user,col2_pass = line.strip().split()
        if col1_user == account:
            passtries = 0
            while passtries < 3:
                pass1 = input(&#39;请输入密码：&#39;)
                if col2_pass == pass1:
                   print(&#39;欢迎使用&#39;)
                   exit()
                else:
                   passtries +=1
            else:
                tolockfile.write(&#39;%s\n&#39; %(account))
                print(&#39;账号已锁定！&#39;)
                exit()
 
        else:
            print(&#39;此账号不存在&#39;)
            break
 
while tries<3:
    account = input(&#39;请输入账号:&#39;)
    islock(account)
    inaccount(account)
    tries +=1
else:
    print(&#39;此用户真的不存在 88&#39;)
    exit()
 
lockfile.close()
userfile.close()
tolockfile.close()
 
 
 
# with open(&#39;account_lock.txt&#39;,&#39;a&#39;,encoding=&#39;UTF-8&#39;) as data:  
#     data.write("aaa")  
#此方法可以方式忘记文件close
#tolockfile = open(&#39;account_lock.txt&#39;,&#39;a&#39;,encoding=&#39;UTF-8&#39;)
#open文件后进行追加至最后一行

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