code: def get_range(self, range_start, range_end, **kwargs):
          
          range_response = self.get_range_response(range_start, range_end,
                                                   **kwargs)
          for kv in range_response.kvs:
              yield (kv.value, KVMetadata(kv, range_response.header))
docs: Get a range of keys.
  
          :param range_start: first key in range
          :param range_end: last key in range
          :returns: sequence of (value, metadata) tuples