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Solve the following python programming problem given the following code:
def _update_session_token_cb(self, creds, provider = 'aws', callback = None, error = None, attempts = 0) : 
    "Callback to use with `async_aws_sts`. The 'provider' arg is a
    bit misleading, it is a relic from boto and should probably be
    left to its default. This will take the new Credentials obj from
    `async_aws_sts.get_session_token()` and use it to update
    self.provider, and then will clear the deque of pending requests.

    A callback is optional. If provided, it must be callable without
    any arguments.
    " 
    def raise_error() : 
        self.provider.security_token = None 
        if callable (callback) : 
            return callback (error = error) 
else : 
            logging.error (error) 
            raise error 
if error : 
        if isinstance (attempts, InvalidClientTokenIdError) : 
            raise_error () 
else : 
            if (attempts > self.max_sts_attempts) : 
                raise_error () 
else : 
                seconds_to_wait = (0.1 * (2 ** attempts)) 
                logging.warning (('Got error[%s] getting session token, retrying in %.02f seconds' % (error, seconds_to_wait))) 
                ioloop.IOLoop.current ().add_timeout ((time.time () + seconds_to_wait), functools.partial (self._update_session_token, attempts = (attempts + 1), callback = callback, bypass_lock = True)) 
                return 
else : 
        self.provider = Provider (provider, creds.access_key, creds.secret_key, creds.session_token) 
        self._auth_handler = HmacAuthV3HTTPHandler (self.host, None, self.provider) 
        while self.pending_requests : 
            request = self.pending_requests.pop () 
            request () 
if callable (callback) : 
            return callback () 

    
    

    Fix the buggy line: if isinstance (attempts, InvalidClientTokenIdError) :
assistant
#Here is Python program to fix the buggy line: if isinstance (attempts, InvalidClientTokenIdError) :
.

if isinstance (error, InvalidClientTokenIdError) :