[lxml-dev] Custom Elements question

[Alex Klizhentas]

Hi All,
Got a question:

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

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!

and overriding
    def makeelement(self, tag, attrib):
        return Node(tag, attrib)

in the NodeBase just does not help,

Any advice will be appreciated,
Alex
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