FreeOpcUa / python-opcua

        result = self.history_read(details)

        return result.HistoryData.DataValues

    def history_read(self, details):

        """

        Read raw history of a node, low-level function

        result code from server is checked and an exception is raised in case of error

        """

        valueid = ua.HistoryReadValueId()

        valueid.NodeId = self.nodeid

        valueid.IndexRange = ''

        params = ua.HistoryReadParameters()

        params.HistoryReadDetails = details

        params.TimestampsToReturn = ua.TimestampsToReturn.Both

        params.ReleaseContinuationPoints = False

        params.NodesToRead.append(valueid)

        result = self.server.history_read(params)[0]

        return result

    def read_event_history(self, starttime=None, endtime=None, numvalues=0, evtypes=ua.ObjectIds.BaseEventType):

        """

            event_res.append(events.Event.from_event_fields(evfilter.SelectClauses, res.EventFields))

        return event_res

    def history_read_events(self, details):

        """

        Read event history of a node, low-level function

        result code from server is checked and an exception is raised in case of error

        """

        valueid = ua.HistoryReadValueId()

        valueid.NodeId = self.nodeid

        valueid.IndexRange = ''

        params = ua.HistoryReadParameters()

        params.HistoryReadDetails = details

        params.TimestampsToReturn = ua.TimestampsToReturn.Both

        params.ReleaseContinuationPoints = False

        params.NodesToRead.append(valueid)

        result = self.server.history_read(params)[0]

        return result

    # Hack for convenience methods

    # local import is ugly but necessary for python2 support