[Zope] Testing multiple values for existance

[marc lindahl]

Try testing for existence first -- hasattr()

> From: Oliver Sturm <sturm@oliver-sturm.de>
> Date: Thu, 20 Sep 2001 19:45:41 +0200
> To: "zope@zope.org" <zope@zope.org>
> Subject: [Zope] Testing multiple values for existance
> 
> Hi!
> 
> I can do <dtml-if foo> to test if foo is known at all. Why can't I do
> <dtml-if "foo or bar"> to test if either foo or bar are known? I get a
> "Name Error" saying something like "global name 'foo' is not defined" if I
> do this (and foo is actually undefined). Is there a different syntax for
> this?
> 
> 
> Oliver Sturm / <sturm@oliver-sturm.de>
> 
> -- 
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> 
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