If you plan on using this version of the plugin, use bottiger's script (run it on python2) as I don't plan on updating my version of the script since it's a lost cause (it was one of my first times writing something on python, I don't like how it turned out), I'd rather take the time to make an item schema extension. I personally use this version of the plugin
https://github.com/FlaminSarge/tf2idb since the script included is python3 compatible, with the changes I posted on top.