Python program 1 "Login Interface"

Writing the Login interface

--Enter user name and password

--Show welcome message after successful authentication

--locked three times after the wrong time

Version-1

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Account_file = ' Account.txt '

Lock_file = ' Lock.txt '

For I in range (3):

Username = raw_input ("Username:"). Strip ()

Password = raw_input ("Password:"). Strip ()

If Len (username)!=0 and len (password)!=0:

f = File (' Account_file ')

Loginsuccess = False

For line in F.readlines ():

If username = = Line.split () [0] and Password = = Line.split () [1]: #user and passwd are correct

Print "Welcome%s login my system"% username

Break

If Loginsuccess is True: #login success

Break

Else

Continue

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Version-2

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Import OS

Account_file = ' Account.txt '

Lock_file = ' Loack.txt '

# put account in a list

F =file (Account_file)

Account_list = F.readlines ()

F.close ()

While True:

# put locked user into a lock list

f = File (Lock_file)

Lock_list = []

For I in F.readlines ():

Line=i.strip (' \ n ')

Lock_list.append (line)

F.close ()

Loginsuccess = False

Userame =raw_input (' username: '). Strip ()

If username in lock_list:

Print "Sorry,you is already in the block list,getthe fuking out!"

Break

For line in Account_list:

line = Line.split ()

If line[0] = = Username: #username correct

For I in range (3):

Password = raw_input (' passwd: '). Strip ()

if password = = line[1]: #paswd correct

Print "Welcome%s login my system!"% username

Loginsuccess = True

Break

Else

f = File (Lock_file, ' a ')

F.write ('%s\n '%username)

Print "entered 3 times of wrong passwd,going to lock%s"% username

if loginsuccess = = True:break #jump out of a for Top loop

if loginsuccess = = True:break #jump out of the while loop

Python program 1 "Login Interface"