Python 3.0 simulates user logon and implements three error locks.

Python 3.0 simulates user logon and implements three error locks.

Python is an interpreted, object-oriented, and dynamic data type high-level programming language.

Python was invented by Guido van rosum at the end of 1989. The first public release was released in 1991.

Like Perl, Python source code also complies with the GPL (GNU General Public License) protocol.

Python 3.0 is often called Python 3000 or Py3k. Compared with earlier versions of Python, this is a major upgrade. In order not to bring too much effort into it, Python 3.0 was not designed with backward compatibility considerations.

The following is an example of code. We will introduce python 3.0 to simulate user logon and implement three error locks. The Code is as follows:

#-*-Coding: UTF-8-*-# simulate user logon as required, logon count = 0 # realname passwdReal_Username = "test" Real_Password = "test" # Read blacklisted content f = open ('black _ user ', 'R') lock_file = f. read () f. close () Username = input ('enter User name: ') # judge whether the input user is in the blacklist. If so, the password for I in range (1) is not allowed ): if lock_file = Username: print ('Sorry, your user is locked and is not allowed for use now! ') Exit () else: continue # try to enter the Password and count the number of inputs for I in range (3): Password = input ("enter the Password :") if Username = Real_Username and Password = Real_Password: print ("Logon successful") break else: print ("Logon Failed") count + = 1 # if three wrong passwords are entered, the user name is locked, and the user name is blacklisted. if count = 3: print ("sorry, the number of wrong password attempts you have entered has reached 3, and your user name will be locked ") f = open ("black_user", "w") f. write ("% s" % Username) f. close ()

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