Adds @data to the sorted set
            @data: #dict or dict-like object

def update(self, data):
        """ Adds @data to the sorted set
            @data: #dict or dict-like object
        """
        if data:
            _dumps = self._dumps
            zargs = [
                _dumps(x) if (i % 2 == 1) else x
                for y in data.items()
                for i, x in enumerate(reversed(y))
            ]
            return self._client.zadd(self.key_prefix, *zargs)