Mastering GUI Programming with Python

Single shot timers

QTimer is a simple QObject subclass that can emit a timeout signal after a certain period of time.

The simplest way to defer a single action with QTimer is to use the QTimer.singleShot() static method, as follows:

    def show(self):        super().show()        qtc.QTimer.singleShot(self.timeout * 1000, self.hide)

singleShot() takes two arguments: an interval in milliseconds and a callback function. In this case, we're calling the self.hide() method after a number of self.timeout seconds (we will multiply by 1,000 to convert this into milliseconds).

Running this script again, you should now see your dialog behaving as expected.