I know you're using Python3.x, so there may be new functionality in Tkinter
that i am not aware of yet. I still have oodles of Python2.x dependencies and
really don't see a need to make the jump yet -- so keep that in mind when
taking my advice below.
In the old days of Tkinter, if you wanted to scroll the mainframe (aka:root,
aka:Tkinter.Tk) you had two choices:
OPTION_1. Use tk.Canvas and "create_window" method
http://infohost.nmt.edu/tcc/help/pubs/tkinter/web/create_window.html
OPTION_2. The "TIX" extension widgets for Tkinter has a "scrolledwindow" object
that requires much less work and provides a more intuitive interface than the
canvas.
PS: It's "Terry" not "Teddy".
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