I haven't looked at it yet but I've been told to look at this for xml export of weights
http://www.marcuskrautwurst.com/2012/12/skinweights-savingloading-in-pymel.html
I haven't looked at it yet but I've been told to look at this for xml export of weights
http://www.marcuskrautwurst.com/2012/12/skinweights-savingloading-in-pymel.html