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Why can't I log in to the imap server twice in Python

As indicated in the error message below, I cannot log in because I am in the LOGOUT state and not in the NONAUTH state. How can I get from LOGOUT to NONAUTH?

Example below (obviously, login credentials are fake below)

Python 2.7.3 (default, Aug  1 2012, 05:14:39)
[GCC 4.6.3] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> import imaplib
>>> imap_server = imaplib.IMAP4_SSL("imap.gmail.com",993)
>>> imap_server.login('something@myserver.com', 'mypassword')
('OK', ['something@myserver.com Joe Smith authenticated (Success)'])
>>> imap_server.logout()
('BYE', ['LOGOUT Requested'])
>>> imap_server.login('something@myserver.com', 'mypassword')
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/usr/lib/python2.7/imaplib.py", line 505, in login
    typ, dat = self._simple_command('LOGIN', user, self._quote(password))
  File "/usr/lib/python2.7/imaplib.py", line 1070, in _simple_command
    return self._command_complete(name, self._command(name, *args))
  File "/usr/lib/python2.7/imaplib.py", line 825, in _command
    ', '.join(Commands[name])))
imaplib.error: command LOGIN illegal in state LOGOUT, only allowed in states NONAUTH
>>> quit()
+5
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1 answer

What you are trying to do is illegal in IMAP. If you read RFC 3501 , it explicitly defines the Output State as a state from which there is no return. Whether you get the error imaplibyourself or from the server, or you are really out of luck, and it works, and you fall into the territory of undefined -behavior ... the answer is the same: do not do this.

, :

>>> imap_server.logout()
('BYE', ['LOGOUT Requested'])
>>> imap_server = imaplib.IMAP4_SSL("imap.gmail.com",993)
>>> imap_server.login('something@myserver.com', 'mypassword')
('OK', ['something@myserver.com Joe Smith authenticated (Success)'])

(, imap_server .)

+6

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