How to use get_device_statistics_delta method in lisa

Best Python code snippet using lisa_python

ethtool.py

Source:ethtool.py

...744            )745        result.assert_exit_code(message=f"Couldn't get device {interface} statistics.")746        device.device_statistics = DeviceStatistics(interface, result.stdout)747        return device.device_statistics748    def get_device_statistics_delta(749        self, interface: str, previous_statistics: Dict[str, int]750    ) -> Dict[str, int]:751        """752        use this method to get the delta of an operation.753        """754        new_statistics = self.get_device_statistics(755            interface=interface, force_run=True756        ).counters757        for key, value in previous_statistics.items():758            new_statistics[key] = new_statistics.get(key, 0) - value759        self._log.debug(f"none-zero delta statistics on {interface}:")760        self._log.debug(761            {key: value for key, value in new_statistics.items() if value != 0}762        )...

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