def count(self, minval, maxval, include_min=True, include_max=True):
        '''Returns the number of elements in the skiplist with a score
        between min and max.
        '''
        rank1 = self.rank(minval)
        if rank1 < 0:
            rank1 = -rank1 - 1
        elif not include_min:
            rank1 += 1
        rank2 = self.rank(maxval)
        if rank2 < 0:
            rank2 = -rank2 - 1
        elif include_max:
            rank2 += 1
        return max(rank2 - rank1, 0)
def count ( self , minval , maxval , include_min = True , include_max = True ) : rank1 = self . rank ( minval ) if rank1 < 0 : rank1 = - rank1 - 1 elif not include_min : rank1 += 1 rank2 = self . rank ( maxval ) if rank2 < 0 : rank2 = - rank2 - 1 elif include_max : rank2 += 1 return max ( rank2 - rank1 , 0 )
Returns the number of elements in the skiplist with a score
        between min and max.