Which version of python goes well with tkinter?

[Barrowman]

Yes, I have been using pip for 2.7 and pip3 for 3 but it only installs for 3.5.2 and there isn't an option to say which version of 3.x so python -V gives 2.7.12 and python3 -V gives 3.5.2.
I guess it's the symbolic links. I will have a look to see if I can change it. No point in using 3.5 instead of 3.6.
Update.
I did the following:

cd /usr/bin
sudo rm python3
sudo ln -s python3 python3.6
sudo pip3 install wxpython

That has fixed it. Be aware that the install takes a while - about 15 minutes on my 2.8GHz processor with 16 Gig ram