# View ### *class* joulescope.view.View(stream_buffer, calibration) #### *property* calibration The device calibration. #### close() Close the view and stop the thread. #### *property* limits Get the (x_min, x_max) limits for the view. #### open() Open the view and run the thread. #### ping(\*args, \*\*kwargs) Ping the thread. * **Parameters:** * **args** – The positional arguments. * **kwargs** – The keyword arguments. * **Returns:** (args, kwargs) after passing through the thread. #### samples_get(start=None, stop=None, units=None, fields=None) Get exact samples over a range. * **Parameters:** * **start** – The starting time. * **stop** – The ending time. * **units** – The units for start and stop. ‘seconds’ or None is in floating point seconds relative to the view. ‘samples’ is in stream buffer sample indicies. * **fields** – The fields to get. None (default) gets the fundamental fields available for this view instance, which may vary depending upon the backend. #### *property* sampling_frequency The output sampling frequency. #### start(stream_buffer: StreamBuffer) Start streaming. #### statistics_get(start=None, stop=None, units=None, callback=None) Get statistics over a range. * **Parameters:** * **start** – The starting time. * **stop** – The ending time. * **units** – The units for start and stop. ‘seconds’ or None is in floating point seconds relative to the view. ‘samples’ is in stream buffer sample indices. * **callback** – The optional callable. When provided, this method will not block and the callable will be called with the statistics data structure from the view thread. * **Returns:** The statistics data structure or None if callback is provided. Note: this same format is used by the `Driver.statistics_callback_register()`. See the [statistics documentation](https://docs.joulescope.com/en/software/pyjoulescope/api/statistics.html) for details on the data format. #### stop() Stop streaming.