Thanks. I ended up executing inkscape several times from my python script (which is fine). However, because of because of https://bugs.launchpad.net/inkscape/+bug/843260 each invocation takes a while and opens transient windows.

It's still better than doing things by hand!

First post! I need to write an extension that will perform the following operations on the selected objects: (1) take a length as a parameter (2) for each selected object (3) Object to Path (4) Set fill color to none (transparent) and stroke color to black (5) Set stroke width to the passed paramete...