Do a recursive copy of the node list. Use
          xmlDocCopyNodeList() if possible to ensure string interning.

def copyNodeList(self):
        """Do a recursive copy of the node list. Use
          xmlDocCopyNodeList() if possible to ensure string interning. """
        ret = libxml2mod.xmlCopyNodeList(self._o)
        if ret is None:raise treeError('xmlCopyNodeList() failed')
        __tmp = xmlNode(_obj=ret)
        return __tmp