I would like to save the point clouds to .ply files using the Python wrapper of the SDK, in the same way that I can save .ply files from the SDK's GUI. But I am unable to find documentation explaining how to achieve this. All I found is the following line:

points = pc.calculate(depth_frame)

But what sort of object is 'points'? What methods can one call for it? Where can I read about it?

Thanks in advance!