docs: def zrange(self, name, offset, limit):
          """
          Return a dict mapping key/score in a range of score from zset ``name``
          between ``offset`` and ``offset+limit`` sorted in ascending order.
  
          Like **Redis.ZRANGE**                
          
          .. warning:: This method is SLOW for large offset!
             
          :param string name: the zset name
          :param int offset: zero or positive,the returned pairs will start at
           this offset
          :param int limit: number of elements will be returned
          :return: a dict mapping key/score in ascending order
          :rtype: OrderedDict
  
          >>> ssdb.zrange('zset_1', 2, 3)
          {'d': 1, 'b': 20, 'a': 30}
          >>> ssdb.zrange('zset_1', 0, 2)
          {'f': -3, 'g': 0}
          >>> ssdb.zrange('zset_1', 10, 10)
          {}
          """
          offset = get_nonnegative_integer('offset', offset)        
          limit = get_positive_integer('limit', limit)        
          return self.execute_command('zrange', name, offset, limit)