from dataclasses import dataclass from datetime import date @dataclass class QualityInfo: # last_replacement: date upcoming_replacement: date installed: bool def __post_init__(self) -> None: # self.last_replacement = date.fromtimestamp(self.last_replacement / 1000) self.upcoming_replacement = date.fromtimestamp(self.upcoming_replacement / 1000) @dataclass class UV(QualityInfo): pass @dataclass class Filter(QualityInfo): milli_litters_passed: int @dataclass class WaterQuality(object): uv: UV filter: Filter