# Record ### *class* pyjoulescope_driver.Record(driver, device_path, signals=None, auto=None) Record streaming sample data to a JLS v2 file. * **Parameters:** * **driver** – The active driver instance. * **device_path** – The device prefix path or list of device prefix paths. * **signals** – The list of signals to record. None=[‘current’, ‘voltage’] * **auto** – Configure automatic operation. Provide the list of automatic operations to perform, which can be: \* signal_enable \* signal_disable None (default) is equivalent to [‘signal_enable’, ‘signal_disable’] Call `open()` to start recording and `close()` to stop. #### close() Close the recording and release all resources. Safe to call repeatedly and after a failed `open()`. * **Raises:** **RuntimeError** – If a write failed, such as on a full disk. The recording is closed, but the file may be incomplete. #### open(filename, user_data=None) Start the recording. * **Parameters:** * **filename** – The filename for the recording. Use time64.filename to produce a filename from timestamp. * **user_data** – The list of additional user data given as [chunk_meta, data] pairs. Use chunk_meta 0 and a data string for notes that display in the Joulescope UI. * **Returns:** self.