QApplication is derived from QCoreApplication and thereby inherits quit() which is a public slot of QCoreApplication, so there is no difference between QApplication::quit() and QCoreApplication::quit(). As we can read in the documentation of QCoreApplication::quit() it “tells the application to exit with return code 0 (success).”. If you want to exit because you discovered file corruption … Read more
This worked for me: import sys, select, os i = 0 while True: os.system(‘cls’ if os.name == ‘nt’ else ‘clear’) print “I’m doing stuff. Press Enter to stop me!” print i if sys.stdin in select.select([sys.stdin], [], [], 0)[0]: line = raw_input() break i += 1 You only need to check for the stdin being input … Read more
This answer is thanks to Matthias BUSSONNIER from the ipython-users mailing list. When I close the window of the running demo application, I see this error: An exception has occurred, use %tb to see the full traceback. SystemExit: 0 Just don’t use sys.exit(0) as you are not exiting python, but still running IPython. Add it … Read more
If you call exit, the destructor will not be called. From the C++ standard (ยง3.6.1/4): Calling the function void exit(int); declared in <cstdlib> (18.3) terminates the program without leaving the current block and hence without destroying any objects with automatic storage duration (12.4). If exit is called to end a program during the destruction of … Read more
What you could do, is register the top level shell for the TERM signal to exit, and then send a TERM to the top level shell: #!/bin/bash trap “exit 1” TERM export TOP_PID=$$ function func() { echo “Goodbye” kill -s TERM $TOP_PID } echo “Function call will abort” echo $(func) echo “This will never be … Read more
abort() exits your program without calling functions registered using atexit() first, and without calling objects’ destructors first. exit() does both before exiting your program. It does not call destructors for automatic objects though. So A a; void test() { static A b; A c; exit(0); } Will destruct a and b properly, but will not … Read more
Try: my_command || { echo ‘my_command failed’ ; exit 1; } Four changes: Change && to || Use { } in place of ( ) Introduce ; after exit and spaces after { and before } Since you want to print the message and exit only when the command fails ( exits with non-zero value) … Read more
Yes, you can register a shutdown hook with Runtime.addShutdownHook().
You can always call an exit by doing this at your landing page use this code on click of your application back button: if (NavigationService.CanGoBack) { while (NavigationService.RemoveBackEntry() != null) { NavigationService.RemoveBackEntry(); } } This will remove back entries from the stack, and you will press a back button it will close the application without … Read more
You’re right – there is no nice API for this. You’re also right on your second point – it’s trivially easy to design a function that does this for you using threading. import threading import subprocess def popen_and_call(on_exit, popen_args): “”” Runs the given args in a subprocess.Popen, and then calls the function on_exit when the … Read more