如何使用 python 或 Shell 代码退出 Qapplication (PyQt)

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.

Answer 1

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

Answer 2

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? ).