How to Quit Qapplication (PyQt) with python or Shell code

Question

Hi Everybody i'm newbie in almost every technology that i'm about to talk you about below , i'm launching an QApplication with sys.exit(qapp.exec_()) (required because i'm using a QWebView in my python class) and everything's fine with that except that the application does not quit by its own after execution and this is causing a problem when i call this Qapplication through a REST Django webservice (the server won't quit loading) , so i was wondering if there's any solution for that , thank you , I was thinking of performing a SIGTSTP (ctrl + z) with python after launching the app , is this a practical solution?

Here is a portion of the code

def main():
    import sys
    qApp = QtGui.QApplication(sys.argv)

    myappWebView = myappWebView()
    myappWebView.load('http://website.com')
    myappWebView.show()
    sys.exit(qApp.exec_())

if __name__ == "__main__":
    main()

A window is being launched whenever i execute this and the linux console won't prompt me for a new command and is stuck until i close the window manually .

In the load method i fill in some files with some retrieved code , so right after the execution i want the application to stop and quit — , Apr 07 '12 at 16:48
Can you add `QCoreApplication.exit()` to the end of the load method? — reclosedev, Apr 07 '12 at 17:02
I cannot because the QApplication (or the QCoreApplication) is being instanciated in the main() function — , Apr 07 '12 at 17:12
It's static method, you don't need to write `qApp.exit()`, just write `QApplication.exit()` — reclosedev, Apr 07 '12 at 18:07

score 2 · Answer 1 · answered Apr 07 '12 at 15:37

2

It's hard to answer without seeing code, but I think you can call QCoreApplication.exit() when job is done.

answered Apr 07 '12 at 15:37

reclosedev

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score 0 · Answer 2 · edited May 23 '17 at 11:50

You can quit the application when the page has finished loading:

myappWebView.loadFinished.connect(qApp.quit)

Or if the page has some javascript that needs time to execute, you can use a timer to delay the application closing:

timer = QTimer()
timer.setInterval(2000) # 2 seconds
myappWebView.loadFinished.connect(timer.start)
timer.timeout.connect(qApp.quit)

(Or you can choose a more complicated and maybe more accurate method: How to know when a web page is loaded when using QtWebKit? ).

How to Quit Qapplication (PyQt) with python or Shell code

2 Answers2