def __init__(self, tag, attrib=_Attrib(), **extra):
super(Element, self).__init__(tag)
self.attrib = _Attrib()
if attrib:
self.attrib.update(attrib)
if extra:
self.attrib.update(extra)
def SubElement(parent, tag, attrib=_Attrib(), **extra):
"""Must override SubElement as well otherwise _elementtree.SubElement
fails if 'parent' is a subclass of Element object.
"""
element = parent.__class__(tag, attrib, **extra)
parent.append(element)
return element