from dataclasses import dataclass


@dataclass
class Usage:
    """
    Represents the memory usage of a flickerstrip.
    """

    used: int
    free: int
    total: int

    def to_json(self):
        """
        Converts the usage to a JSON object.
        """
        return {"used": self.used, "free": self.free, "total": self.total}

    @classmethod
    def from_json(cls, json):
        """
        Creates a usage from a JSON object.
        """
        return cls(used=json["used"], free=json["free"], total=json["total"])