[Tkinter-discuss] radiobutton initial selection

[Howard Lightstone]

I am trying to get a radiobutton without an indicator to show selection 
state.  Calling .invoke() in the widget causes all the callback things to 
happen but ...

The button does NOT show the 'selected' state like it does if I click on 
the button with the mouse.

.select() and .invoke() do not seem to change this display issue.

Is there another way to get the select highlighting (sunken button) to 
happen?

I am using 2.2.3 (with Tk 8.3) but it works the same way with 2.5 (and tk 
8.4.14).

Is this a tk bug?   It looks like _tkinter just passes on arguments to tk 
with minimal processing.