[issue31422] tkinter.messagebox and tkinter.filedialog don't show default button's keyboard shortcuts

[jcrmatos]

New submission from jcrmatos:

tkinter.messagebox windows (eg. askokcancel, showerror, showinfo, ...) in Tkinter 8.6 running on Python 3.5.3, don't don't show the keyboard shortcuts/accelerators in the default buttons.

And the askopenfilename from tkinter.filedialog only shows the Open one. The Cancel does not appear and does not work.

I'm using it under Windows 7 Pro.

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components: Tkinter
messages: 301893
nosy: jcrmatos
priority: normal
severity: normal
status: open
title: tkinter.messagebox and tkinter.filedialog don't show default button's keyboard shortcuts
type: behavior
versions: Python 3.5

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue31422>
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