code: def Expand(self):
          
          ret = libxml2mod.xmlTextReaderExpand(self._o)
          if ret is None:raise treeError('xmlTextReaderExpand() failed')
          __tmp = xmlNode(_obj=ret)
          return __tmp
docs: Reads the contents of the current node and the full
            subtree. It then makes the subtree available until the next
             xmlTextReaderRead() call