Python Basic Login Interface

One:
Writing the Login interface
Basic requirements:

    Let the user enter the user name password
    Show welcome message after successful authentication
    Exit the program after a three-time error

1.dic method

name_info={'Zhang':'123'}count=0 whileCount<3: Name=input ('Please enter user name:')    ifNameinchName_info:password=input ('Please enter your password:')        ifPassword = =Name_info[name]:Print('Welcome Log in')             Break        Else:            Print('password entered incorrectly, please re-enter the password:') Count+=1Else:        Print('input information is incorrect, please re-enter') Count+=1

2.list method

name_info=['Zhang','123']count=0 whileCount < 3: Name=input ('Please enter user name:')    ifName = =name_info[0]: password=input ('Please enter your password:')        ifPassword = = Name_info[1]:            Print('Welcome Log in')             Break        Else:            Print('Password input error, please re-enter') Count+=1Else:        Print('User name input error, please re-enter') Count+=1

Second: The requirements of the upgraded version:

    Can support multiple users login (prompt, through the list to save multiple account information)
    After the user 3 authentication failed, quit the program, start the program again when attempting to log on, or lock the status (hint: the user locked state must be stored in the file)

name_info={'Zhang':{'passwd':'123','Count': 0},'Xin':{'passwd':'123','Count': 0},'Xiao':{'passwd':'123','Count': 0}} Count=0 whileTrue:name=input ('Please enter your user name:')    ifName not inchName_info:Print('This user name does not exist, please re-enter! ')        ContinueWith Open ('Db.txt','R') as F:lock_users=f.read (). Split ('|')        ifNameinchlock_users:Print('user%s has been locked'%name) Break    ifname_info[name]['Count'] > 2:        Print('too many attempts, locked') with open ('Db.txt','a') as F:f.write ('%s|'%name) Break    #if name in Name_info:Password=input ('Please enter your password:')    ifPassword = = name_info[name]['passwd']:        Print('Log In Success')         Break    Else:        Print('Password input error, please re-enter:') name_info[name]['Count']+=1

Python Basic Login Interface