tester

#!/usr/bin/python

import pyatspi
from gi.repository import Gtk

def createWindow():
    window = Gtk.Window(type=Gtk.WindowType.TOPLEVEL)
    grid = Gtk.Grid()
    window.add(grid)
    grid.add(Gtk.Button('foo'))
    grid.add(Gtk.Button('bar'))

    return window

def listener(e):
    isNone = e.source is None
    passesIfObjTest = True
    if not e.source:
        passesIfObjTest = False

    print('e.source: %s isNone: %s passesIfObjTest: %s' % (e.source, isNone, passesIfObjTest))

def onDelete(win, event):
    pyatspi.Registry.stop()

if __name__ == "__main__":
    win = createWindow()
    win.connect('delete-event', onDelete)
    win.show_all()
    pyatspi.Registry.registerEventListener(listener, "object:state-changed:focused")
    pyatspi.Registry.start()