import sys
import gc
import gobject

class Timer(gobject.GObject):
  __gsignals__ = {'time' : 
                  (gobject.SIGNAL_RUN_FIRST,
                   gobject.TYPE_NONE, 
                   ( ))}
  def __init__(self):
    gobject.GObject.__init__(self)
    gobject.timeout_add(1000, self.Emit)
  def Emit(self):
    self.emit('time')
    return True

class Foo:
  def __init__(self):
    self.timer = Timer()
    self.timer.connect('time', self.Handler)
  def Handler(self, timer):
    print 'time'
  def __del__(self):
    print 'called!'


Foo()

mainloop = gobject.MainLoop()
mainloop.run()