I'm looking for ways to access Inkscape UI functionality from within an extension:

1. Is there a way to apply the Outset/Inset functionality from within an extension?  I have found some documentation regarding the Inkscape verb SP_VERB_SELECTION_OFFSET, but I'm not seeing a way to access this, or access it from a wrapper, from a Python script.

2. Is there a way to select a node and change it's sodipodi nodetype value to 'symmetrical' or 'smooth'?  Again, I would like to be able to skip using the desktop icon. Perhaps it's possible to add nodetype in the attributes when the node is created, but I've experimented a bit and haven't seen this attribute show up in the XML until I've manually changed the node to 'symmetrical' using the UI.

And thanks very much to ~suv for the assistance in helping me understand the Outset/Inset functions, and the 'change to path' functions for my previous questions.

- Susan