def gauge_delta(self, name, delta, rate=1):
        # type: (str, float, float) -> None
        """Send a GaugeDelta metric to change a Gauge by the specified value"""

        if self._should_send_metric(name, rate):
            if not is_numeric(delta):
                delta = float(delta)
            self._request(
                GaugeDelta(
                    self._create_metric_name_for_request(name),
                    delta,
                    rate
                ).to_request()
            )
Send a GaugeDelta metric to change a Gauge by the specified value