[Zope] Testing multiple values for existance - still

[Dieter Maurer]

Oliver Sturm writes:
 > >    The section following the one quoted above explained
 > >    how "foo" is interpreted in a boolean context
 > >    (such as the "dtml-if").
 > 
 > The section you are referring to details how "foo" is interpreted in a
 > boolean context in the Python language. I was asking how the expression
 > "foo" is interpreted in <dtml-if foo> (not <dtml-if "foo">),
I had also this answered already!

      <dtml-if XXX>

is equivalent to

      <dtml-if expr="_.has_key('XXX') and XXX">


You find this (and lots of other facts) in 

  <http://www.dieter.handshake.de/pyprojects/zope/book/chap3.html>




Dieter