01_python basic exercise _ 01 login, 01_python_01login

01_python basic exercise _ 01 login, 01_python_01login

README:

How to use it:
    There is a file with username and password named 'username.txt' in directory 'login'.
    When user inputs username and password, the program will verify it. If they are wrong, user can try again. 
    Remember user only have three chances, then the wrong username will be writen in the file named 'name_locked.txt'.
    If the username user inputs is in 'name_locked.txt', user has no chance to try again!

1 # Author: Zhang Yide 2 # coding: UTF-8 3 4 count = 0 5 done = False 6 lock = False 7 _ name = None 8 9 while count <3:10 _ name = input ('Please input username :') 11 _ password = input ('Please input password: ') 12 _ namepw = _ name + ': '+ _ password +' \ n' 13 14 character _ namepw in name_locked.txt 15 f_lock = open('name_locked.txt ') 16 for line in f_lock.readlines (): 17 if line = _ name +' \ N ': 18 print ('{name} has Been locked! '. Format (name = _ name) 19 f_lock.close () 20 lock = True21 f_lock.close () 22 break23 else: 24 continue25 26 # pai_namepw.txt 27 f_username = open('username.txt ') 28 for line in f_username.readlines (): 29 if line = _ namepw: 30 print ('Welcome {name }! '. Format (name = _ name) 31 done = True32 f_username.close () 33 break34 else: 35 continue36 37 rows if the username.txt file is being uploaded, an error is prompted. 38 if done = False and lock = False: 39 print ('username or password is wrong! Try again! ') 40 count + = 141 f_username.close () 42 else: 43 break44 cursor is locked and is written to lock.txt. 45 if done = False and lock = False: 46 print ('the username {name} has been locked '. format (name = _ name) 47 with open('name_locked.txt ', 'A') as f_lock: 48 f_lock.write (' {name} \ n '. format (name = _ name) 49 else: 50 pass