human
Solve the following python programming problem given the following code:
def StartLoop(self, device) : 
    'Start this scenario.  It will run at the configured frequency until StopLoop() is called.' 
    logger = logging.LoggerAdapter (logging.getLogger (), { 
        'scenario' : _OnException.name, 
}) 
    def _OnComplete() : 
        self._timeout = IOLoop.current ().add_timeout ((time.time () + self.frequency), _RunIteration) 
def _OnException(typ, val, tb) : 
        if ((typ, val, tb) != (None, None, None)) : 
            if (typ is web.HTTPError) : 
                message = self._http_error_dict.get (val.status_code, ('HTTP status %d received from viewfinder: %s' % (val.status_code, val.log_message))) 
                logger.error (message) 
else : 
                logger.error ('Unknown exception in scenario %s', self.name, exc_info = (typ, val, tb)) 
_OnComplete () 
def _RunIteration() : 
        with util.Barrier (_OnComplete, _OnException) as b : 
            self.handler (device, logger, b.Callback ()) 
_RunIteration () 

    
    

    Fix the buggy line: 'scenario' : _OnException.name ,
assistant
#Here is Python code to fix the buggy line: 'scenario' : _OnException.

'scenario' : self.name ,