import gobject
import gtk

class Core(gobject.GObject):
    
    __gsignals__ = {
        "query-ready" : (gobject.SIGNAL_RUN_LAST, gobject.TYPE_NONE, [gobject.TYPE_PYOBJECT]),
        "initialized" : (gobject.SIGNAL_RUN_LAST, gobject.TYPE_NONE, []),
    }
    
    def __init__(self):
    	gobject.GObject.__init__(self)
    	
    def doit(self):
    	self.emit("initialized")
    	
def on_init(s):
	print "TATA"
    	
c = Core()
c.connect("initialized", on_init)
c.doit()
gtk.main()