    def get_object_id(split_path: str, hash_data: Hashable):
        """Returns plasma.ObjectID from hashing split_path and object_num."""
        hash = hashlib.blake2b(bytes(split_path, "utf-8"), digest_size=20)
        harg = json.dumps(hash_data).encode("utf-8")
        hash.update(harg)
        return plasma.ObjectID(hash.digest())
Returns plasma.ObjectID from hashing split_path and object_num.
fairseq/data/plasma_utils.py