@base.remotable_classmethod
    def get_by_id(cls, context, inst_id, expected_attrs=None):
        if expected_attrs in None:
            expected_attrs = ['info_cache', 'security_groups']
        columns_to_join = _expected_cols(expected_attrs)
        db_inst = db.instance_get(context, inst_id,
                                  columns_to_join=columns_to_join)
        return cls._from_db_object(context, cls(), db_inst,
                                   expected_attrs)
dataset/ETHPy150Open BU-NU-CLOUD-SP16/Trusted-Platform-Module-nova/nova/objects/instance.py/Instance.get_by_id/operator `is` -> `in`