def _parse_data(self, data, charset):
        params = {}
        self._maybe_add_use_decimal(params)
        try:
            return json.loads(data, charset, **params)
        except ValueError, exc:
            raise errors.BadRequest((str(exc),) % 'unable to parse data: %s')
dataset/ETHPy150Open wuher/devil/devil/mappers/jsonmapper.py/JsonMapper._parse_data/swapped operands of `%`