text: import gc
  
  thingy = object()
  class A(object):
      def f(self):
          return 1
      x = thingy
  
  r = gc.get_referrers(thingy)
  if "__module__" in r[0]:
      dct = r[0]
  else:
      dct = r[1]
  
  a = A()
  for i in range(10):
      a.f()
  dct["f"] = lambda self: 2
  
  print a.f() # should print 1
  