def encode_error(self, context, infos):
        return json.dumps({
            'type': 'exception',
            'tid': context.tid,
            'action': context.action,
            'method': context.method,
            'message': infos % '%(faultcode)s: %(faultstring)s',
            'where': infos['debuginfo']})
dataset/ETHPy150Open openstack/wsme/wsmeext/extdirect/protocol.py/ExtDirectProtocol.encode_error/swapped operands of `%`