[Zope] Use of lambda expression in DTML

[Dieter Maurer]

Nick Drew writes:
 > 
 > I'm a newbie zopista, and python for that matter...
 > 
 > In brief: I get a NameError when invoking "filter(...)" from DTML.  I thought this was a built-in python method, so I'm a bit puzzled.

For security reasons, Zope are removed all builtin-functions from
DTML expressions. You can access some of the builtin objects
as attributes/methods the special variable "_".

Look in the DTML reference (e.g. at URL:http://zdp.zope.org)
for a list of available builtins in "_".

Dieter