How to use the routingpy.exceptions.OverQueryLimit function in routingpy

def test_raise_over_query_limit(self):
        query = self.params
        responses.add(
            responses.POST,
            'https://httpbin.org/post',
            json=query,
            status=429,
            content_type='application/json'
        )

        with self.assertRaises(routingpy.exceptions.OverQueryLimit):
            client = RouterMock(base_url="https://httpbin.org", retry_over_query_limit=False)
            client.directions(url='/post', post_params=query)

def _get_body(response):
        status_code = response.status_code

        try:
            body = response.json()
        except json.decoder.JSONDecodeError:
            raise exceptions.JSONParseError("Can't decode JSON response:{}".format(response.text))

        if status_code == 429:
            raise exceptions.OverQueryLimit(status_code, body)

        if 400 <= status_code < 500:
            raise exceptions.RouterApiError(status_code, body)

        if 500 <= status_code:
            raise exceptions.RouterServerError(status_code, body)

        if status_code != 200:
            raise exceptions.RouterError(status_code, body)

        return body

result = self._get_body(response)

            return result

        except exceptions.RouterApiError:
            if self.skip_api_error:
                warnings.warn(
                    "Router {} returned an API error with "
                    "the following message:\n{}".format(self.__class__.__name__, response.text)
                )
                return

            raise

        except exceptions.RetriableRequest as e:
            if isinstance(e, exceptions.OverQueryLimit) and not self.retry_over_query_limit:
                raise

            warnings.warn(
                'Rate limit exceeded.\nRetrying for the {}{} time.'.format(tried, get_ordinal(tried)),
                UserWarning
            )
            # Retry request.
            return self._request(
                url, get_params, post_params, first_request_time, retry_counter + 1, requests_kwargs
            )