Re: Custom Elements question

Hi,

Alex Klizhentas wrote:
> I've extended the ElementBase object using the approach described in the
> tutorial, but SubElement does not work as desired:
> 
> class NodeBase(etree.ElementBase):
>      def append(self,child):
>  print "aaa"
>  return etree.ElementBase.append(self,child)
> 
> etree.SubElement(root,"child") #no "aaa" printed

That's because SubElement() does not call .append().

> OK, but when taking your code to the module:
> 
> def SubElement(parent, tag, attrib={}, **extra):
>     attrib = attrib.copy()
>     attrib.update(extra)
>     element = parent.makeelement(tag, attrib)
>     parent.append(element)
>     return element
> 
> SubElement(root,"child") # "aaa" is here!

As expected, as you call .append() explicitly here.

> and overriding
>     def makeelement(self, tag, attrib):
>         return Node(tag, attrib)
> 
> in the NodeBase just does not help,

SubElement() does not call .makeelement() either. It's implemented in plain C.
Could you explain a bit why you want to do this and how your .append() differs
from the normal append code?

Stefan