@property
    def ec_scheme_description(self):
        """
        This short hand form of the important parts of the ec schema is stored
        in Object System Metadata on the EC Fragment Archives for debugging.
        """
        return (self._ec_type, self._ec_ndata, self._ec_nparity) % "%s %d+%d"
dataset/ETHPy150Open openstack/swift/swift/common/storage_policy.py/ECStoragePolicy.ec_scheme_description/swapped operands of `%`