How to not enable a user to close the root tkinter window
rosuav at gmail.com
Mon Sep 22 13:56:37 CEST 2014
On Mon, Sep 22, 2014 at 9:43 PM, Nicholas Cannon
<nicholascannon1 at gmail.com> wrote:
> Or can I safely stop the running threads and make them drop everything error free?
This would be what I'd recommend. If someone wants to close your
program, s/he should be allowed to - imagine if internet traffic is
costly  and the query was done accidentally. So what you need is to
have the shutdown divided into three steps:
1) Close the window, or at least show visually that it's shutting down.
2) Send a signal to the worker threads
3) When the worker threads all shut down, terminate the program.
You can handle step 3 simply by ensuring that the threads aren't
marked as daemons. Python won't shut down until they're all gone. Step
1 is, I suspect, already happening. So all you need to do is message
the worker thread - and that can be done simply by setting a global
variable or something.
However, I'm not seeing any use of threads in your code. What thread
is being cut off? What's the error you're seeing?
 "costly" might not mean money, although it can. But imagine you're
on a slow connection and you can't afford to have other programs
lagging out something that's important.
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