ch_part2_dataclass_token.py

@dataclass(frozen=True)
class ServerToken:
    server_id: ServerId
    token_idx: int
    _seed: int = SEED
        
    @property
    @functools.lru_cache()
    def key(self) -> str:
        return f"{self.node_id}-{self.token_idx}"
        
    @property
    @functools.lru_cache()
    def hash_value(self) -> int:
        return hash_mmh3(key=self.key, seed=self._seed)
        
    def __lt__(self, other: "Node") -> bool:
        return self.hash_value < other.hash_value