code: def process_500(self, request, exception):
          '''Internal server error.'''
          id_ = str(uuid.uuid4())[:6].upper()
          msg = 'Internal server error: 500. Unique error identifier is {}'
          msg = msg.format(id_)
          log.error('HTTP 500 [Message - {}]: {}'.format(id_, msg))
          log.error('HTTP 500 [Arguments - {}]: {}'.format(id_, request.args))
          log.exception('HTTP 500 [Traceback - {}]:'.format(id_))
          return msf process_500(self, request, exception):
          '''Internal server error.'''
          id_ = str(uuid.uuid4())[:6].upper()
          msg = 'Internal server error: 500. Unique error identifier is {}'
          msg = msg.format(id_)
          log.error('HTTP 500 [Message - {}]: {}'.format(id_, msg))
          log.error('HTTP 500 [Arguments - {}]: {}'.format(id_, request.args))
          log.exception('HTTP 500 [Traceback - {}]:'.format(id_))
          return msg
docs: Internal server error.