render cycles

I am trying to render via python.
But i have got small problems.
I am using

bpy.ops.render.render(animation=False, write_still=False, layer="", scene="")['Render Result'].save_render(filepath=path_i)

//path_i my own path

My question is it is possible to see what progress in rendering is?
If I use that i do not see how picture looks like or what progress in rendering is?
How colud I change window?
Thanks a lot for reply