In this topic I posted an image of a problem I was having executing Python scripts. On my machine at least the solution given by @ronanpeter, with a working workflow attached, solved it for me. Please see below my post for his solution. I did not need to use a virtualenv for it, I just pointed my script to where Python 3.6 resides, i.e. C:\Python36\ (just the folder name, not the executable).