Is there a way to pythonically detect when the current node selection has been changed without polling the current selection repeatedly?

After a lot of looking it doesn't seem like this is possible. It would be great if we could get this functionality added. Perhaps make it a script that gets called from the script folder, similar to OnCreated.py and such.

Have you seen I think they added it in 17 maybe

https://www.sidefx.com/docs/houdini/hom/hou/ui.html#addSelectionCallback [www.sidefx.com]