PYTHON 3.7 _tkinter.TclError: invalid command name "tixBalloon"
When you use tix widgets, you also need to use the tix version of Tk().
So replace root = Tk() with:
root = tix.Tk()
When you use tix widgets, you also need to use the tix version of Tk().
So replace root = Tk() with:
root = tix.Tk()