def notify(self, resource):
        observers = self._observeLayer.notify(resource)
        logger.debug("Notify")
        for transaction in observers:
            with transaction:
                transaction.response = None
                transaction = self._requestLayer.receive_request(transaction)
                transaction = self._observeLayer.send_response(transaction)
                transaction = self._blockLayer.send_response(transaction)
                transaction = self._messageLayer.send_response(transaction)
                if transaction.response is not None:
                    if transaction.response.type == defines.Types["CON"]:
                        self._start_retransmission(transaction, transaction.response)

                    self.send_datagram(transaction.response)
Notifies the observers of a certain resource.
dataset/ETHPy150Open Tanganelli/CoAPthon/coapthon/server/coap.py/CoAP.notify