Hi Garito, I saw in another thread you still need this. If I'm not wrong what you are pretending is to somehow render zpt on the fly. So, here is my idea:
I would like to write things like:
object.property = 'here/anotherproperty' object.anotherproperty = 'Barcelona'
and ask it like:
print object.property -> 'Barcelona'
or
<tal:city tal:replace='here/property' /> -> 'Barcelona'
Is this possible? I think you could perhaps create a new class to store the tal expression attributes, let's say you called it ExpressionAttribute. This class must be callable and be able to evaluate tal expressions. This is a small sketch of how I think it should look like:
from Products.PageTemplates.ZopeTemplate import ZopeTemplate class ExpressionAttribute: #Here I also assume that you only enter the expressions #without html and the tal part, like: 'here/property' #Please also noticed that all sintax errors in your zpt #code must be catched somewhere def __init__(self, id, talExpr): self.talExpr = '<span tal:replace="%s"/>' % talExpr #I'm not sure about this, but I think it will create a Template on #the fly. self.zpt = ZopePageTemplate(id, text = self.talExpr) #Note: I really don't know if you have to pass other parameters to #pt_render, ie: the container of your property. You will have to test #this. def __call__(self): return self.zpt.pt_render() Then, in the __init__ of your zope product you will need to do things like this: class YourProd(...): def __init__(self,prop1,prop2,prop3,...): #This is a normal property self.prop1 = prop1 #This two are tal expression properties self.prop2 = ExpressionAttribute(prop1) self.prop3 = ExpressionAttribute(prop1) Then, I guess you can call it as: yourProdObj.prop3 or in tal: here/prop3 I'm not sure about what I wrote and if this is what you are looking for. I just hope it helps. Regards Josef