Process response hook.

        Process non-redirect responses received by the send() method.
        May augment the response.  The default implementation causes
        an exception to be raised if the response status code is >=
        400.

def proc_response(self, resp):
        """Process response hook.

        Process non-redirect responses received by the send() method.
        May augment the response.  The default implementation causes
        an exception to be raised if the response status code is >=
        400.
        """

        # Raise exceptions for error responses
        if resp.status >= 400:
            e = exc.exception_map.get(resp.status, exc.HTTPException)
            self._debug("  Response was a %d fault, raising %s",
                        resp.status, e.__name__)
            raise e(resp)