668         # try to use our own fast iterator if it exists

   668         # try to use our own fast iterator if it exists

   669         self._trysetasclist()

   669         self._trysetasclist()

   670         if self._ascending:

   670         if self._ascending:

   671             attr = 'fastasc'

   671             attr = 'fastasc'

   672         else:

   672         else:

   674         it = getattr(self, attr)

   674         it = getattr(self, attr)

   675         if it is not None:

   675         if it is not None:

   676             return it()

   676             return it()

   677         # maybe half of the component supports fast

   677         # maybe half of the component supports fast

   678         # get iterator for _r1

   678         # get iterator for _r1