2605             self._ascending = False

  2605             self._ascending = False

  2606         else:

  2606         else:

  2607             if self._ascending:

  2607             if self._ascending:

  2608                 self.reverse()

  2608                 self.reverse()

  2609 

  2609 

  2616     def __sub__(self, other):

  2610     def __sub__(self, other):

  2617         filterfunc = lambda r: r not in other

  2611         filterfunc = lambda r: r not in other

  2618         if self._ascending is not None:

  2612         if self._ascending is not None:

  2619             return orderedlazyset(self, filterfunc, ascending=self._ascending)

  2613             return orderedlazyset(self, filterfunc, ascending=self._ascending)

  2620         return filteredset(self, filterfunc)

  2614         return filteredset(self, filterfunc)