I know this is an old thread, but is there any news on python3 support in Houdini 17? Since Python2 is being end-of-lifed very soon (https://pythonclock.org/) I'm hoping not to build my new tooling around it.
There are no plans to bring Python 3 support to Houdini 17.0 or 17.5.
Our goal is to follow the VFX Reference Platform (http://vfxplatform.com/) and ideally have a tech preview (i.e. not production ready) Python 3 build later this year for the next major Houdini release and an official build next year.