Thanks for the patch. If you want to improve the examples in tkinter documentation, I'd suggest to update Class.__init__(self, ...) to super().__init__(...). There is no old-style classes in Python 3 anymore so those examples could be updated safely.

Also, please read https://docs.python.org/devguide/patch.html. Sending a patch from a Git checkout will only make the review process harder (and I will personally ignore them in the future).