Pythonshell which Python version?

Hi. I am trying to use the Pythonshell node to start a program on a RPi. My default environment is Python 3.5.3. THe proram has a shebang statement reflecting this environment and works fine from the command line or a desktop icon (#!/usr/bin/env python3). When executing it from the Pythonshell command, it can't find the first import module. It is finding the program. I assume it's launching the program in an emvironment other than where I have the modules installed but this may not really be the problem. I am quite new to this environment.

Also, is it possible to launch a program on a machine other than the one the NR instance is on?