User Login-determines that the entered password is incorrect three times and then the account is frozen. The user login password is incorrect.

User Login-determines that the entered password is incorrect three times and then the account is frozen. The user login password is incorrect.

'''
Create a user and lock file, and store the account and password of the user. This file is used for Logon judgment. The lock file is frozen three times after an account error occurs.
User Content format:
{'Name': 'hangsan ', 'passwd': '000000 '}
{'Name': 'lisi', 'passwd': '000000 '}
{'Name': 'hangw', 'passwd': '000000 '}
'''

Import OS
'''Try/try t''' is not used for this method '''

Def lock (_ name ):
''' Determine whether a user is frozen '''
If OS. path. getsize ("lock "):
With open ("lock", "r") as f:
For line in f:
If line. strip () = "":
Continue
Line = eval (line)
If line ["name"] = _ name and line ["num"] = 3:
Return 0
Else:
Return-1
Else:
Return-1

Def clear_lock ():
'''When the program exits, the non-frozen account information will be deleted '''
List = []
With open ("lock", "r +") as f:
For line in f:
If line. strip () = "":
Continue
Line = eval (line)
If line ["num"] = 3:
List. append (line)
F. truncate (0)
With open ("lock", "w") as f1:
For I in list:
F1.write (str (I) + '\ n ')

Def login (_ name, _ passwd ):
'''User login '''
With open ("user", "r") as f:
Flag = 0
For line in f:
If line. strip () = "":
Continue
Line = eval (line)
If line ["name"] = _ name:
If line ["name"] = _ name and line ["passwd"] = _ passwd:
Return 0
Else:
Return 1
Return-1

Def write_lock (_ name ):
'''Write the wrong account into the lock file '''
# The file is not empty.
If OS. path. getsize ("lock "):
List = []
With open ("lock", "r +") as f:
Flag = 0
For line in f:
If line. strip () = "":
Continue
Line = eval (line)
# Determine whether an account exists
If line ["name"] = _ name:
Line ["num"] + = 1
List. append (line)
Else:
Dict2 = {}
Dict2 ["name"] = _ name
Dict2 ["num"] = 1
List. append (dict2)
With open ("lock", "w") as f1:
For I in list:
F1.write (str (I) + '\ n ')


# Writing Empty files directly
Else:
List1 = []
Dict1 = {}
Dict1 ["name"] = _ name
Dict1 ["num"] = 1
List1.append (str (dict1 ))
With open ("lock", "w") as f2:
For j in list1:
F2.write (str (j) + '\ n ')

Def main ():
Name = input ("User name :")
Res = lock (name)
If res = 0:
Print ("% s has been frozen, please contact the Administrator" % name)
Clear_lock ()
Exit ()
Passwd = input ("Password :")
Res1 = login (name, passwd)
If res1 = 0:
Print ("Welcome % s login 51CTO" % name)
Clear_lock ()
Exit ()
Elif res1 = 1:
Print ("Incorrect password ")
Write_lock (name)
Else:
Print ("account does not exist ")

Res2 = lock (name)
If res2 = 0:
Print ("% s has been frozen, please contact the Administrator" % name)
Clear_lock ()
Exit ()

While True:
Main ()