2883 

  2883 

  2884     def isdescending(self):

  2884     def isdescending(self):

  2885         """True if the set will iterate in descending order"""

  2885         """True if the set will iterate in descending order"""

  2886         raise NotImplementedError()

  2886         raise NotImplementedError()

  2887 

  2887 

  2888     def min(self):

  2889     def min(self):

  2889         """return the minimum element in the set"""

  2890         """return the minimum element in the set"""

  2890         if self.fastasc is not None:

  2891         if self.fastasc is not None:

  2891             for r in self.fastasc():

  2892             for r in self.fastasc():

  2892                 return r

  2893                 return r

  2893             raise ValueError('arg is an empty sequence')

  2894             raise ValueError('arg is an empty sequence')

  2894         return min(self)

  2895         return min(self)

  2895 

  2896 

  2896     def max(self):

  2898     def max(self):

  2897         """return the maximum element in the set"""

  2899         """return the maximum element in the set"""

  2898         if self.fastdesc is not None:

  2900         if self.fastdesc is not None:

  2899             for r in self.fastdesc():

  2901             for r in self.fastdesc():

  2900                 return r

  2902                 return r