FreeOpcUa / python-opcua

    while True:

        properties.extend(curr_node.get_properties())

        if curr_node.nodeid.Identifier == ua.ObjectIds.BaseEventType:

            break

        parents = curr_node.get_referenced_nodes(refs=ua.ObjectIds.HasSubtype, direction=ua.BrowseDirection.Inverse, includesubtypes=False)

        if len(parents) != 1: # Something went wrong

            return None

        curr_node = parents[0]

    return properties

def _find_parent_eventtype(node):

                self.EventType = node.nodeid

                curr_node = node

                while curr_node.nodeid.Identifier != parent_identifier:

                    for prop in curr_node.get_properties():

                        setattr(self, prop.get_browse_name().Name, prop.get_value())

                    parents = curr_node.get_referenced_nodes(refs=ua.ObjectIds.HasSubtype, direction=ua.BrowseDirection.Inverse, includesubtypes=False)

                    if len(parents) != 1: # Something went wrong

                        return None

                    curr_node = parents[0]

                self._freeze = True