code: def handle_logout_response(self, response, sign_alg=None, digest_alg=None):
          
  
          logger.info("state: %s", self.state)
          status = self.state[response.in_response_to]
          logger.info("status: %s", status)
          issuer = response.issuer()
          logger.info("issuer: %s", issuer)
          del self.state[response.in_response_to]
          if status["entity_ids"] == [issuer]:  # done
              self.local_logout(decode(status["name_id"]))
              return 0, "200 Ok", [("Content-type", "text/html")], []
          else:
              status["entity_ids"].remove(issuer)
              if "sign_alg" in status:
                  sign_alg = status["sign_alg"]
              return self.do_logout(decode(status["name_id"]),
                                    status["entity_ids"],
                                    status["reason"], status["not_on_or_after"],
                                    status["sign"], sign_alg=sign_alg,
                                    digest_alg=digest_alg)
docs: handles a Logout response
  
          :param response: A response.Response instance
          :return: 4-tuple of (session_id of the last sent logout request,
              response message, response headers and message)