code: def copyProp(self, target):
          
          if target is None: target__o = None
          else: target__o = target._o
          ret = libxml2mod.xmlCopyProp(target__o, self._o)
          if ret is None:raise treeError('xmlCopyProp() failed')
          __tmp = xmlAttr(_obj=ret)
          return __tmp
docs: Do a copy of the attribute.