Convert Non-planer Surfaces (or Ploy-surfaces looks like surface) to Planer ones

Scripting
1

Hi,
Is there a way to convert Non-planner Surfaces (or Ploy-surfaces looks like surface) to Planner ones?
What I do is that I duplicate the edge of the surface and trim it from a planer surface after drawing it from one of it’s corners, or by using set point command. Is there any other faster way? like one click or something?
thanks.

2

The python script in the thread Need to work with hundreds of polysurfaces might help.