old_contents: class LazyObject(object):
      def __init__(self, factory):
          self._factory = factory
  
      def __getattribute__(self, name):
          factory = object.__getattribute__(self, '_factory')
          obj = factory()
          self.__class__ = obj.__class__
          self.__dict__ = obj.__dict__
          return object.__getattribute__(obj, name)
  
new_contents: class LazyObject(object):
      def __init__(self, factory):
          self._factory = factory
  
      def __getattribute__(self, name):
          factory = object.__getattribute__(self, '_factory')
  
          obj = factory()
          if not obj:
              raise RuntimeError('Unable to create lazy object from %s' % factory)
          self.__class__ = obj.__class__
          self.__dict__ = obj.__dict__
  
          return object.__getattribute__(obj, name)
  
subject: check for the factory being None