I'm new to writing Inkscape extensions and writing Python code in general.

My first project is an extension to reformat SVGs exported from FreeCAD.

I already managed ungrouping all objects (with modified code from "deep ungroup" extension) and assigning a desired stroke-with to stroked pathes and a desired color to filled paths.

Now I want to combine (Ctrl K) all stroked paths and unite (Ctrl +) all filled paths.

How can I do that?

Here is the last part of my code:

            for node in self.ungroupedNodes:
                if('stroke' in node.style and node.style['stroke'] != 'none'):
                    node.style['stroke-width'] = 1.2
                    # code for combine here?

                if('fill' in node.style and node.style['fill'] != 'none'):
                    node.style['fill'] = 'red'
                    # code for union here?