[FIXED] PyQt6.QWidgets has no attribute qApp

Issue

I am migrating (someone else his) code from pyqt5 to pyqt6 and the following code is giving me an error:

def quitApp(self):
        """ Exit application callback """
        QtWidgets.qApp.quit

It seems that this no longer works in pyqt6 (I get the error in the title). I tried to find how I am supposed to do this in pyqt6 but I could not find it, unfortunately.

Anyone any ideas?

Solution

QtWidgets.qApp is appication instance, to obtain application instance in pyqt6 you can call QtWidgets.QApplication.instance() method, but it's not necessary since all instance methods exposed in QtWidgets.QApplication as static methods (QtWidgets.QApplication implements singleton pattern), so to quit you can call QtWidgets.QApplication.quit() which does the same as QtWidgets.QApplication.instance().quit() does.

This works in pyqt6 and in pyqt5.

Answered By - mugiseyebrows