1.
You should reset self.in_error=False in __retry_process to get __retry_process
called again , as a good practice , I would get ride of self.in_error
and use
if (process_state == QtCore.QProcess.NotRunning) and self.current_try < 5
instead .
2.
If the above solution didn't work, maybe there is a bug with PySide, please
give a try with PyQt5.
:
At 2019-06-01 15:26:49, "Frank Rueter | OHUfx" <fr...@ohufx.com> wrote:
>Hi all,
>
>I am using QProcess to launch an external application. The main part
>work without trouble, but I need to check for license errors and if one
>occurred, I need would like to restart the existing process with all
>it's environment settings and signal connections a certain number of times.
>
>I connect QProcess.readyReadStandardError to a slot that toggles an
>attribute called self.in_error to True.
>I also connect QProcess.stateChanged to another slot which looks like this:
>
> def __retry_process(self, process_state):
> max_retries = 5
> if (process_state == QtCore.QProcess.NotRunning) and self.in_error:
> # process has finished in an error state, so try to run it
>again
> self.current_try += 1
> print 'retrying {}/{}'.format(self.current_try, max_retries)
> self.process.start(self.process.program(),
>self.process.arguments())
>
>This prints the line "retrying 1/5" but after that nothing happens. I
>can't see any log output from self.process so if seems to simply not be
>running the second time around.
>I thought this would recursively call self.process 5 times after failing
>the first time, since self.process.stateChanged is still connected to
>self__retry_process(), and the current_try attribute is on class level
>where it gets incremented on every unsuccessful try.
>
>I am obviously wrong about that. Could someboy help me out please?
>
>Cheers,
>frank
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