import json
from dataclasses import dataclass
from typing import List

@dataclass
class SensorImg:
    base64: str

    def to_json(self) -> str:
        """将数据类序列化为 JSON 字符串"""
        return json.dumps(self.__dict__, indent=4, default=lambda x: x.__dict__)

    @classmethod
    def from_json(cls, json_str: str) -> 'SensorImg':
        """从 JSON 字符串反序列化为数据类"""
        data_dict = json.loads(json_str)
        return cls(**data_dict)
@dataclass
class SensorData:
    pos: str
    x: float
    y: float

    def to_json(self) -> str:
        """将数据类序列化为 JSON 字符串"""
        return json.dumps(self.__dict__, indent=4, default=lambda x: x.__dict__)

    @classmethod
    def from_json(cls, json_str: str) -> 'SensorData':
        """从 JSON 字符串反序列化为数据类"""
        data_dict = json.loads(json_str)
        return cls(**data_dict)

@dataclass
class AllSensorData:
    data: List[SensorData]
    time: str


@dataclass
class AllImg:
    image: SensorImg
    time: str