[Inkscape-user] Effect xml: xml in string

I have a standalone python program that generates svg layouts for 'n-up' printing, like four postcards arranged on a page. Or 30 address labels, or whatever.

Trying to package it as an Inkscape effect, I run into something like this:

svg_xml_string = foo() reader = Sax2.Reader() content = reader.fromString(svg_xml_string) self.document.documentElement.appendChild(content.documentElement)

dies with:

xml.dom.WrongDocumentErr: Node is from a different document

Well duh. :-)

So how can I move svg_xml_string into the Inkscape document tree? I've RTFM'ed on PyXML, but didn't find it.

Thanks, Terry