Method save

openevolve/database.py:590–637

Save the database to disk Args: path: Path to save to (uses config.db_path if None) iteration: Current iteration number

(self, path: Optional[str] = None, iteration: int = 0)

        return sorted_programs[:n]

    def save(self, path: Optional[str] = None, iteration: int = 0) -> None:
        """
        Save the database to disk

        Args:
            path: Path to save to (uses config.db_path if None)
            iteration: Current iteration number
        """
        save_path = path or self.config.db_path
        if not save_path:
            logger.warning("No database path specified, skipping save")
            return

        # Perform artifact cleanup before saving
        self._cleanup_old_artifacts(save_path)

        # create directory if it doesn't exist
        os.makedirs(save_path, exist_ok=True)

        # Save each program
        for program in self.programs.values():
            prompts = None
            if (
                self.config.log_prompts
                and self.prompts_by_program
                and program.id in self.prompts_by_program
            ):
                prompts = self.prompts_by_program[program.id]
            self._save_program(program, save_path, prompts=prompts)

        # Save metadata
        metadata = {
            "island_feature_maps": self.island_feature_maps,
            "islands": [list(island) for island in self.islands],
            "archive": list(self.archive),
            "best_program_id": self.best_program_id,
            "island_best_programs": self.island_best_programs,
            "last_iteration": iteration or self.last_iteration,
            "current_island": self.current_island,
            "island_generations": self.island_generations,
            "last_migration_generation": self.last_migration_generation,
            "feature_stats": self._serialize_feature_stats(),
        }

        with open(os.path.join(save_path, "metadata.json"), "w") as f:
            json.dump(metadata, f)

        logger.info(f"Saved database with {len(self.programs)} programs to {save_path}")

    def load(self, path: str) -> None:
        """