tk is not defined

[tralfazy]

Don't name your file tkinter.py It shadows the tkinter module you want to use.

This helped me. Thanks! I didn't name my file tkinter.py but I had made one previously.
Then my other programs that used tkinter stopped working because of that tkinter.py that was located in the common python folder I was using.
duh!! I can't believe that I made such a dumb mistake. Here I was uninstalling and reinstalling tkinter over and over trying to fix the problem but the only problem was that I had made a local tkinter.py that was being imported instead of python importing the real tkinter.
aye aye aye!