Hi, I have some code where I try to get a named template and render it and if it fails I render a default template instead. But this fails, presumably because the __call__ method of NamedTemplate does not return anything. From zope/formlib/namedtemplate.py (Zope 2.10): class NamedTemplate(object): def __init__(self, name): self.__name__ = name def __get__(self, instance, type=None): if instance is None: return self return component.getAdapter(instance, INamedTemplate, self.__name__) def __call__(self, instance, *args, **kw): self.__get__(instance)(*args, **kw) I seems strange to me that __call__ does not actually return anything. Is it just me? Now, I have some other code where NamedTemplate is working just fine, so there is probably nothing wrong with this __call__ method. So can anybody tell me what is wrong with my following code then? class Renderer(base.Renderer): default_template = ViewPageTemplateFile('vocabularyportlet.pt') def render(self): """Render a named template or the default template. """ template = NamedTemplate("test.vocabulary") try: output = template(self) except ComponentLookupError: output = None # Even if the component lookup works, output can be None. if output is None: output = self.default_template() return output The line "output = template(self)" fails with a ComponentLookupError unless a named template with the name test.vocabulary exists. But when that template is found, output is still None. In case you want to see the entire code, this is in a Plone portlet that I am developing: http://svn.plone.org/svn/collective/collective.portlet.vocabulary/trunk/coll... And actually, the tests that I added pass when I change the NamedTemplate.__call__ method to return the value that it just got. So should that method be changed or is there a different way to do this? Thanks, -- Maurits van Rees | http://maurits.vanrees.org/ Work | http://zestsoftware.nl/ "This is your day, don't let them take it away." [Barlow Girl]