Wed, 12 Feb 2003 13:26:58 -0600
Jim Fulton wrote:
> I'm surprised you can have a tales expression after the "|".
The ability to have a TALES expression as the final alternate was added
in Dec. 2001 as a result of a discussion I can't find anywhere. Hmm. I
also have an apparently bogus memory of documenting the new grammar.
> I think that this is a bad idea, especially since you didn't
> even say what "defer" does, which, I guess, is in keeping with
> it's undocumentedness. :)
It's an experimental expression type usable to defer evaluation of other
expressions. "defer:<foo>" evaluates to a callable object. This object
returns the value of the deferred expression in the current context, so
<div tal:define="xis defer:string:x is $x">
<p tal:repeat="x python:range(3)"
<p>x is 0</p>
<p>x is 1</p>
<p>x is 2</p>
> I also didn't think that "|" caught *all* exceptions. Does it?
No, just (Undefined, AttributeError, KeyError, TypeError, IndexError,
Unauthorized) at the moment.
> I think the right answer to this question is to write a Python script
Evan @ 4-am