How can i get the segments of a Polycurve? and how to get the Nurbssurface from a Brepface?

I am writing a 3dm importer with Rhino3dm in Python and want to acess the underlying Points and Knots and some other info, in order to recreate the Geometry in my Targetapplication. Also I get many crashes when i try to acess brepfaces from a brepfacelist. I can see that one of the functions i need is commented out in the source code bindings: //public NurbsSurface ToNurbsSurface() (file: bnd_surface.h). So the solution is a matter of time?
With best regards

Hi @ralph_schoeneberg - I’ve moved your post to a more appropriate category.