content.py 文件源码

def __init_subclass__(cls, class_id, **kwargs):
        super().__init_subclass__(**kwargs)
        cls.class_id = attr.ib(default=class_id, init=False)
        cls.struct = make_struct(
            cls, exclude_attrs={'class_id'}, struct=PropertiesStruct
        )
        cls.BY_ID[class_id] = cls