from dataclasses import dataclass from marshmallow import EXCLUDE, Schema, fields @dataclass class AtlasImageModel: uri: str = None height: int = None width: int = None class AtlasImageSchema(Schema): class Meta: unknown = EXCLUDE uri = fields.Url(required=False, missing=None) height = fields.Integer(required=False, missing=None) width = fields.Integer(required=False, missing=None)