Failed to get separate instances of a class under mod_python

class Foo(object):
   pass

kidprocs = []

for kid in ('kid1', 'kid2'):

  pid = os.fork()
  if pid:
    # parent
    kidprocs.append(pid)
    time.sleep(5)
  else:
    # child

    fooobj = Foo()
    print "Starting %s in sub-process %s" % (kid, os.getpid())
    print "Kid fooobj: %s" % repr(fooobj)
    os._exit(0)

for kidproc in kidprocs:
  os.waitpid(kidproc, 0)

Starting kid1 in sub-process 20906
    foo obj: <__main__.Foo instance at 0xb7da5fec>

Starting kid2 in sub-process 20909
    foo obj: <__main__.Foo instance at 0xb7da5fec>