          self.objects.append(self.get_dump_object(obj))
          self._current = None
  
      def get_dump_object(self, obj):
          model = obj._meta.proxy_for_model if obj._deferred else obj.__class__
          data = OrderedDict([('model', force_text(model._meta))])
          if not self.use_natural_primary_keys or not hasattr(obj, 'natural_key'):
              data["pk"] = force_text(obj._get_pk_val(), strings_only=True)
          data['fields'] = self._current
          return data
  
 
</s> remove         model = obj._meta.proxy_for_model if obj._deferred else obj.__class__
        attrs = OrderedDict([("model", smart_text(model._meta))])
 </s> add         attrs = OrderedDict([("model", smart_text(obj._meta))]) </s> remove         if not self._deferred:
            class_id = self._meta.app_label, self._meta.object_name
            return model_unpickle, (class_id, [], simple_class_factory), data
        defers = []
        for field in self._meta.fields:
            if isinstance(self.__class__.__dict__.get(field.attname),
                          DeferredAttribute):
                defers.append(field.attname)
        model = self._meta.proxy_for_model
        class_id = model._meta.app_label, model._meta.object_name
        return (model_unpickle, (class_id, defers, deferred_class_factory), data)
 </s> add         class_id = self._meta.app_label, self._meta.object_name
        return model_unpickle, (class_id,), data </s> remove             if obj._deferred:
                obj = obj._meta.proxy_for_model
 </s> add  </s> remove         non_deferred_model = instance._meta.proxy_for_model
        opts = non_deferred_model._meta

        assert instance is not None
 </s> add         if instance is None:
            return self
        opts = instance._meta </s> remove         if self._deferred:
            non_deferred_model = self._meta.proxy_for_model
        else:
            non_deferred_model = self.__class__
        db_instance_qs = non_deferred_model._default_manager.using(db).filter(pk=self.pk)
 </s> add         db_instance_qs = self.__class__._default_manager.using(db).filter(pk=self.pk)
        data = OrderedDict([('model', force_text(obj._meta))])
          self.objects.append(self.get_dump_object(obj))
          self._current = None
  
      def get_dump_object(self, obj):
        data = OrderedDict([('model', force_text(obj._meta))])
        data = OrderedDict([('model', force_text(obj._meta))])
          if not self.use_natural_primary_keys or not hasattr(obj, 'natural_key'):
              data["pk"] = force_text(obj._get_pk_val(), strings_only=True)
          data['fields'] = self._current
          return data
  
keep keep keep keep replace replace keep keep keep keep keep
 Fixed #26207 -- Replaced dynamic classes with non-data descriptors for deferred instance loading. 
django/core/serializers/python.py