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How to use _encode_event_payload method in localstack

Best Python code snippet using localstack_python

serializer.py

Source:serializer.py

...222        event_stream_shape = operation_model.get_event_stream_output()223        event_stream_member_name = operation_model.output_shape.event_stream_name224        # wrap the generator in operation specific serialization225        def event_stream_serializer() -> Iterable[bytes]:226            yield self._encode_event_payload("initial-response")227            # yield convert_to_binary_event_payload("", event_type="initial-response")228            # create a default response229            serialized_event_response = self._create_default_response(operation_model)230            # get the members of the event stream shape231            event_stream_shape_members = (232                event_stream_shape.members if event_stream_shape is not None else None233            )234            # extract the generator from the given response data235            event_generator = response.get(event_stream_member_name)236            if not isinstance(event_generator, Iterator):237                raise ProtocolSerializerError(238                    "Expected iterator for streaming event serialization."239                )240            # yield one event per generated event241            for event in event_generator:242                # find the actual event payload (the member with event=true)243                event_member = None244                for member in event_stream_shape_members.values():245                    if member.serialization.get("event"):246                        event_member = member247                        break248                if event_member is None:249                    raise UnknownSerializerError("Couldn't find event shape for serialization.")250                # serialize the part of the response for the event251                self._serialize_response(252                    event.get(event_member.name),253                    serialized_event_response,254                    event_member,255                    event_member.members if event_member is not None else None,256                    operation_model,257                )258                # execute additional response traits (might be modifying the response)259                serialized_event_response = self._prepare_additional_traits_in_response(260                    serialized_event_response, operation_model261                )262                # encode the event and yield it263                yield self._encode_event_payload(264                    event_type=event_member.name, content=serialized_event_response.data265                )266        return HttpResponse(267            response=event_stream_serializer(),268            status=operation_model.http.get("responseCode", 200),269        )270    def _encode_event_payload(271        self,272        event_type: str,273        content: Union[str, bytes] = "",274        error_code: Optional[str] = None,275        error_message: Optional[str] = None,276    ) -> bytes:277        """278        Encodes the given event payload according to AWS specific binary event encoding.279        A specification of the format can be found in the AWS docs:280        https://docs.aws.amazon.com/AmazonS3/latest/API/RESTSelectObjectAppendix.html281        :param content: string or bytes of the event payload282        :param event_type: type of the event. Usually the name of the event shape or specific event types like283                            "initial-response".284        :param error_code: Optional. Error code if the payload represents an error....

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