Управляйте действием окна закрытия в PYQT5
app = QApplication(sys.argv)
app.aboutToQuit.connect(myExitHandler) # myExitHandler is a callable
Thoughtless Tapir
app = QApplication(sys.argv)
app.aboutToQuit.connect(myExitHandler) # myExitHandler is a callableclass MainWindow(QWidget): # or QMainWindow
...
def closeEvent(self, event):
# do stuff
if can_exit:
event.accept() # let the window close
else:
event.ignore()