code: def docCopyNodeList(self, doc):
          
          if doc is None: doc__o = None
          else: doc__o = doc._o
          ret = libxml2mod.xmlDocCopyNodeList(doc__o, self._o)
          if ret is None:raise treeError('xmlDocCopyNodeList() failed')
          __tmp = xmlNode(_obj=ret)
          return __tmp
docs: Do a recursive copy of the node list.