Philipp von Weitershausen wrote at 2006-5-23 17:02 +0200:
> ...
>callable() isn't even deprecated yet, so if it solves our problem, we
>can use it IMO. Note that Zope 3 deliberately doesn't use it because of
>the proxy problem. Zope 2 works around that by stripping
>proxies/wrappers first (ob.aq_base). Perhaps Zope3 should do that as
>well. Would callable(removeAllProxies(obj)) be harmful in any way if you
>end up calling the proxied obj() anyway?

At least earlier, "callable" had a problem: some objects where
apparently "callable" but calling them resulted in "AttributeError: __call__".
That's why "cDocumentTemplate" grew a "safe_callable".

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