Bug in Tkinter?

[bowman]

Fredrik Lundh wrote:
> 
> <tre17 at student.canterbury.ac.nz> wrote:
> > permanent reference to StringVar instance, and now it works?
> 
> feature, not bug.  it's related to:
> http://www.python.org/doc/FAQ.html#4.69

I haven't dug into the underlying code, but in those instances where a
variable is not required to make the widgets work like a textvariable in
an Entry, is there any advantage to using a StringVar and calling get()
on it as opposed to just calling directly against the widget?