def account_acls(self, req):
        """
        Return a dict of ACL data from the account server via get_account_info.

        Auth systems may define their own format, serialization, structure,
        and capabilities implemented in the ACL headers and persisted in the
        sysmeta data.  However, auth systems are strongly encouraged to be
        interoperable with Tempauth.

        Account ACLs are set and retrieved via the header
           X-Account-Access-Control

        For header format and syntax, see:
         * :func:`swift.common.middleware.acl.parse_acl()`
         * :func:`swift.common.middleware.acl.format_acl()`
        """
        info = get_account_info(req.environ, self.app, swift_source='TA')
        try:
            acls = acls_from_account_info(info)
        except ValueError as e1:
            self.logger.warning(e1 % "Invalid ACL stored in metadata: %r")
            return None
        except NotImplementedError as e2:
            self.logger.warning(
                "ACL version exceeds middleware version: %r"
                % e2)
            return None
        return acls
dataset/ETHPy150Open openstack/swift/swift/common/middleware/tempauth.py/TempAuth.account_acls/swapped operands of `%`