[Tkinter-discuss] Please help -- Tkinter Scale widget with DoubleVar is acting weird

[Jared Cohen]

Thanks to both of you for your help. I already do have mechanisms in 
place that prevent the callback from actually doing anything if the 
variable has not really been changed. But the problem with that method 
(and with both of your suggestions) is that even if the callback doesn't 
do anything, it is still getting invoked when it shouldn't be. I was 
simply trying to figure out WHY, because I felt that it would be more 
elegant to completely stop the callback from getting invoked 
incorrectly, than to allow it to be invoked and then have it return 
without doing anything. But if that's not feasible, then I'll just have 
to do it the other way :-)
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