Houdini supports Python only in version 2.7, but tensorflow library requires at least Python 3. What would be your best advise to integrate it until sesi starts official support for Python 3.

How this interprocess communication work - is there some listener in houdini that could facilitate data exchange?

Is there a reason you cannot pre-generate your datasets before training and use them in a python 3 environment?
I have tensorflow installed on windows under python 2.7 in a sperate python environment outside of Houdini. The issue in Houdini on Windows is much more about the binary compatibility of the libraries you install.

It's mostly about lowering the ‘entry-point’. Being able to use and LEARN without constantly jumping between houdini and other environments curtails the learning curve.