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[3.14] gh-123193: Document tkinter Variable lifetime (GH-152625) - #153099
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A Tk variable wrapper unsets its Tcl variable when garbage collected, so a reference must be kept while a widget uses it. Otherwise Tk recreates the Tcl variable but never unsets it again, leaking it. (cherry picked from commit 820b6ca) Co-authored-by: Serhiy Storchaka <storchaka@gmail.com> Co-authored-by: Claude Opus 4.8 <noreply@anthropic.com>
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A Tk variable wrapper unsets its Tcl variable when garbage collected, so a
reference must be kept while a widget uses it. Otherwise Tk recreates the Tcl
variable but never unsets it again, leaking it.
(cherry picked from commit 820b6ca)
Co-authored-by: Serhiy Storchaka storchaka@gmail.com
Co-authored-by: Claude Opus 4.8 noreply@anthropic.com