def fail(self, check):
        """Send failure if not already notified"""
        incident_key = (check['hostname'], check['check']) % '%s:%s'
        ok = self._send_email(check)
        if ok:
            self.logger.info('Sent email alert for %s' % incident_key)
        else:
            # TODO: do backup notifications
            pass
dataset/ETHPy150Open pandemicsyn/stalker/stalkeragent/stalkeragent/stalker_notifications.py/EmailNotify.fail/swapped operands of `%`