run_evogym_ppo.py

import json
import os
import sys

CURR_DIR = os.path.dirname(os.path.abspath(__file__))

LIB_DIR = os.path.join(CURR_DIR, "libs")
sys.path.append(LIB_DIR)
from experiment_utils import initialize_experiment, load_experiment

import custom_envs.parkour
from arguments.evogym_ppo import get_args
from gym_utils import load_robot
from run_ppo import run_ppo


class ppoConfig:
    def __init__(self, args):
        self.num_processes = args.num_processes
        self.eval_processes = 1
        self.seed = 1

        self.steps = args.steps
        self.num_mini_batch = args.num_mini_batch
        self.epochs = args.epochs
        self.learning_rate = args.learning_rate
        self.gamma = args.gamma
        self.clip_range = args.clip_range
        self.ent_coef = 0.01
        self.vf_coef = 0.5
        self.max_grad_norm = 0.5
        self.lr_decay = True
        self.gae_lambda = 0.95
        self.init_log_std = args.init_log_std


def main():

    args = get_args()

    expt_path = os.path.join(CURR_DIR, "out", "evogym_poet", args.name)
    expt_args = load_experiment(expt_path)

    niche_path = os.path.join(expt_path, "niche", str(args.key))
    assert os.path.exists(niche_path), f"no niche key {args.key}"

    result_path = os.path.join(niche_path, "ppo_result")
    initialize_experiment(args.name, result_path, args)

    robot = load_robot(CURR_DIR, expt_args["robot"])
    terrain_file = os.path.join(niche_path, "terrain.json")
    terrain = json.load(open(terrain_file, "r"))

    env_kwargs = dict(**robot, terrain=terrain)

    ppo_config = ppoConfig(args)

    for i in range(args.num):
        print(f"----------start ppo learning {i+1: 2}----------")
        save_path = os.path.join(result_path, str(i + 1))
        controller_path = os.path.join(save_path, "controller")
        os.makedirs(controller_path, exist_ok=True)

        history_file = os.path.join(save_path, "history.csv")
        run_ppo(
            env_id=expt_args["task"],
            robot=env_kwargs,
            train_iters=args.train_iters,
            eval_interval=args.evaluation_interval,
            save_file=controller_path,
            config=ppo_config,
            deterministic=True,
            save_iter=True,
            history_file=history_file,
        )
        print()


if __name__ == "__main__":
    main()