Maurits van Rees wrote at 2008-1-13 23:32 +0000:
>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/ (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?

It returns only if you use "return" (otherwise, it returns "None").

Thus, try "return self.__get__(....)".

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