| # Copyright (C) 2020 Intel Corporation | |
| # | |
| # SPDX-License-Identifier: MIT | |
| import attr | |
| _NOTSET = object() | |
| def not_empty(inst, attribute, x): | |
| assert len(x) != 0, x | |
| def default_if_none(conv): | |
| def validator(inst, attribute, value): | |
| default = attribute.default | |
| if value is None: | |
| if callable(default): | |
| value = default() | |
| elif isinstance(default, attr.Factory): | |
| value = default.factory() | |
| else: | |
| value = default | |
| elif not isinstance(value, attribute.type or conv): | |
| value = conv(value) | |
| setattr(inst, attribute.name, value) | |
| return validator | |
| def ensure_cls(c): | |
| def converter(arg): | |
| if isinstance(arg, c): | |
| return arg | |
| else: | |
| return c(**arg) | |
| return converter |