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GeezerVison is showing github.com — [3.15] gh-159517: Do not use ::tk::unsupported::MacWindowStyle in IDLE on Tk 9.1 (GH-159527) by miss-islington · Pull Request #159624 · python/cpython

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@miss-islington

@miss-islington miss-islington commented Oct 17, 2026 •
edited by bedevere-app Bot
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Tk 9.1 no longer provides this command. Use "wm attributes -stylemask
docmodal" instead, as Tk itself does for its balloon window. The calls
were silently ignored, so the completion list and the call tip could
grab the focus on macOS.
(cherry picked from commit e5ef47e)

Co-authored-by: Serhiy Storchaka [email protected]

  • Issue: On macOS with Python 3.15, test_idle and test_tkinter fail with _tkinter.TclError: invalid command name "::tk::unsupported::MacWindowStyle" on Tk/Tcl 9.1 #159517

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@serhiy-storchaka @miss-islington
pythongh-159517: Do not use ::tk::unsupported::MacWindowStyle in IDLE…
7c8b6bb 
… on Tk 9.1 (pythonGH-159527)

Tk 9.1 no longer provides this command.  Use "wm attributes -stylemask
docmodal" instead, as Tk itself does for its balloon window.  The calls
were silently ignored, so the completion list and the call tip could
grab the focus on macOS.
(cherry picked from commit e5ef47e)

Co-authored-by: Serhiy Storchaka <[email protected]>
@miss-islington
miss-islington requested a review from terryjreedy as a code owner October 17, 2026 13:36
@bedevere-app bedevere-app Bot mentioned this pull request Oct 17, 2026
On macOS with Python 3.15, test_idle and test_tkinter fail with _tkinter.TclError: invalid command name "::tk::unsupported::MacWindowStyle" on Tk/Tcl 9.1 #159517
Closed
@bedevere-app bedevere-app Bot added the awaiting review label Oct 17, 2026
@bedevere-app bedevere-app Bot mentioned this pull request Oct 17, 2026
gh-159517: Do not use ::tk::unsupported::MacWindowStyle in IDLE on Tk 9.1 #159527
Merged
@serhiy-storchaka
serhiy-storchaka enabled auto-merge (squash) October 17, 2026 13:48
@serhiy-storchaka
serhiy-storchaka merged commit b4031e0 into python:3.15 Oct 17, 2026
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@bedevere-app bedevere-app Bot removed the awaiting review label Oct 17, 2026
@miss-islington
miss-islington deleted the backport-e5ef47e-3.15 branch October 17, 2026 14:07
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@terryjreedy terryjreedy Awaiting requested review from terryjreedy terryjreedy is a code owner

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2 participants

@miss-islington @serhiy-storchaka
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