Someone

import pyatspi

savedObjs = []

def printFrame(obj):
    while obj:
        obj.ref() # just force it
        if obj.getRoleName() == "frame":
            print "frm 0x%x: %s\n" % (id(obj), obj)
        obj = obj.parent

def handleKeystroke(event):
    if event.event_string == "F12":
        event.consume = True
        if event.type == pyatspi.KEY_RELEASED_EVENT:
            reg.stop()

reg = pyatspi.Registry
reg.registerKeystrokeListener(handleKeystroke,
                              synchronous=True,
                              preemptive=True,
                              mask=pyatspi.allModifiers())

def onFocus(event):
    print dir(event.source)
    print "obj 0x%x: %s" % (id(event.source), event.source)
    printFrame(event.source)

reg.registerEventListener(onFocus, 'focus')

reg.start()

print "Goodbye"