[Zope3-dev] RFC: abolishing python: expressions in ZPT TALES

[Gary Poster]

On Dec 28, 2005, at 5:00 PM, Igor Stroh wrote:

> Rocky Burt wrote:
>> ...
>> Its my personal opinion that anytime a page template requires logic
>> complicated enough to warrant using a 'python:' expression, that  
>> logic
>> should be re-thought and placed into a view class.  ...

First, I have sympathy with those who want this to be a documentation  
change, possibly with a permanent default-but-configurable warning,  
rather than ripping out the feature.  I think "python:" has been  
around too long to change without a full "reinvent TAL for 2.0 or  
switch to an competing templating technology" discussion.  It's too  
much a part of standard in-the-trenches TALES usage.

> +/-0
> I'd give it a +1 if TAL would support boolean operators :)

Second, I agree with Igor than booleans are the time when I still  
pull out the "python:" bit of the TALES toolbox.  If we remove or  
deprecate "python:", I'd like to have a replacement.

The other replacements people have mentioned for the "python:"  
feature are list item access and calling with arguments.  I don't  
care as much about the list item access, but wouldn't object to it.   
I'm opposed to a new TAL syntax that allows calling with arguments:  
that's the core of the "python:" feature, and what many are opposed to.

Gary