subprocess.popen how wait complete open process

[Chris Angelico]

On Mon, 22 Aug 2022 at 13:41, Dan Stromberg <drsalists at gmail.com> wrote:
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> On Sun, Aug 21, 2022 at 2:05 PM Chris Angelico <rosuav at gmail.com> wrote:
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>> On Mon, 22 Aug 2022 at 05:39, simone zambonardi
>> <simone.zambonardi at gmail.com> wrote:
>> >
>> > Hi, I am running a program with the punishment subrocess.Popen(...) what I should do is to stop the script until the launched program is fully open. How can I do this? I used a time.sleep() function but I think there are other ways. Thanks
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>> First you have to define "fully open". How would you know?
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> If you're on X11, you could conceivably use:
>      xwininfo -tree -root
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That's only one possible definition: it has some sort of window. But
to wait until a program is "fully open", you might have to wait past a
splash screen until it has its actual application window. Or maybe
even then, it's not ready for operation. Only the OP can know what
defines "fully open".

ChrisA