How to use the elasticsearch2.RequestError function in elasticsearch2

def wrapped(*args, **kwargs):
        if client() is not None:
            try:
                return func(*args, **kwargs)
            except ConnectionError as e:
                raise exceptions.SearchUnavailableError(str(e))
            except NotFoundError as e:
                raise exceptions.IndexNotFoundError(e.error)
            except RequestError as e:
                if e.error == 'search_phase_execution_exception':
                    raise exceptions.MalformedQueryError('Failed to parse query')
                if 'ParseException' in e.error:  # ES 1.5
                    raise exceptions.MalformedQueryError(e.error)
                if type(e.error) == dict:  # ES 2.0
                    try:
                        root_cause = e.error['root_cause'][0]
                        if root_cause['type'] == 'query_parsing_exception':
                            raise exceptions.MalformedQueryError(root_cause['reason'])
                    except (AttributeError, KeyError):
                        pass
                raise exceptions.SearchException(e.error)
            except TransportError as e:
                # Catch and wrap generic uncaught ES error codes. TODO: Improve fix for https://openscience.atlassian.net/browse/OSF-4538
                raise exceptions.SearchException(e.error)