[Inkscape-devel] Python extension extend to all Inkscape function and width height of any element.

Is there away to access Inkscape other function through Python to run Inkscape basic operation of really any operation you can run by hand through the gui. And do anyone know how to get the bounding box width and height of a g svg element or any element that don't have that information set as a attribute. The only solution I can fantom is iterating through the group to find the biggest element of them all but even that can be tricky.