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From: Terry Reedy <tjreedy@udel.edu>
Newsgroups: comp.lang.python
Subject: Re: non-blocking getkey?
Date: Wed, 18 Nov 2015 12:55:33 -0500
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On 11/18/2015 11:50 AM, Ulli Horlacher wrote:
> Ulli Horlacher <framstag@rus.uni-stuttgart.de> wrote:
>
>>          from Tkinter import Tk
>>          from tkFileDialog import askopenfilename
>>
>>          Tk().withdraw()
>>          file = askopenfilename()
>
> I found another glitch:
>
> After termination of askopenfilename() the window focus is not returned to
> the calling window (xterm on Linux, cmd on Windows). I have to click it
> again, to regain the focus and continue typing. Is there a workaround?

What happens with

root = Tk()
root.withdraw()
fiel = ...
root.destroy()

Focus cannot stay with destroyed window.

-- 
Terry Jan Reedy