Qt for Python (PySide/Shiboken)

https://github.com/qutebrowser/qutebrowser/blob/master/qutebrowser/browser/webengine/notification.py#L655-L1154 - using PyQt5 rather than PySide, but should look pretty familiar. Also handling lots and lots of corner cases, if you just want to show a plain notification it will be less code than that