78ea013956
For some reason now env.spec.reward_treshold is None - some change in upstream code Also added better pytest skip message
122 lines
4.6 KiB
Python
122 lines
4.6 KiB
Python
import argparse
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import os
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import numpy as np
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import pytest
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import torch
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from torch.utils.tensorboard import SummaryWriter
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from tianshou.data import Collector, VectorReplayBuffer
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from tianshou.policy import PSRLPolicy
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from tianshou.trainer import OnpolicyTrainer
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from tianshou.utils import LazyLogger, TensorboardLogger, WandbLogger
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try:
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import envpool
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except ImportError:
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envpool = None
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def get_args() -> argparse.Namespace:
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parser = argparse.ArgumentParser()
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parser.add_argument("--task", type=str, default="NChain-v0")
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parser.add_argument("--reward-threshold", type=float, default=None)
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parser.add_argument("--seed", type=int, default=1)
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parser.add_argument("--buffer-size", type=int, default=50000)
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parser.add_argument("--epoch", type=int, default=5)
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parser.add_argument("--step-per-epoch", type=int, default=1000)
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parser.add_argument("--episode-per-collect", type=int, default=1)
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parser.add_argument("--training-num", type=int, default=1)
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parser.add_argument("--test-num", type=int, default=10)
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parser.add_argument("--logdir", type=str, default="log")
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parser.add_argument("--render", type=float, default=0.0)
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parser.add_argument("--rew-mean-prior", type=float, default=0.0)
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parser.add_argument("--rew-std-prior", type=float, default=1.0)
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parser.add_argument("--gamma", type=float, default=0.99)
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parser.add_argument("--eps", type=float, default=0.01)
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parser.add_argument("--add-done-loop", action="store_true", default=False)
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parser.add_argument(
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"--logger",
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type=str,
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default="none", # TODO: Change to "wandb" once wandb supports Gym >=0.26.0
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choices=["wandb", "tensorboard", "none"],
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)
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return parser.parse_known_args()[0]
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@pytest.mark.skipif(
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envpool is None,
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reason="EnvPool is not installed. If on linux, please install it (e.g. as poetry extra)",
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)
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def test_psrl(args: argparse.Namespace = get_args()) -> None:
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# if you want to use python vector env, please refer to other test scripts
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train_envs = env = envpool.make_gymnasium(args.task, num_envs=args.training_num, seed=args.seed)
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test_envs = envpool.make_gymnasium(args.task, num_envs=args.test_num, seed=args.seed)
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if args.reward_threshold is None:
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default_reward_threshold = {"NChain-v0": 3400}
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args.reward_threshold = default_reward_threshold.get(args.task, env.spec.reward_threshold)
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print("reward threshold:", args.reward_threshold)
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args.state_shape = env.observation_space.shape or env.observation_space.n
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args.action_shape = env.action_space.shape or env.action_space.n
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# seed
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np.random.seed(args.seed)
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torch.manual_seed(args.seed)
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# model
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n_action = args.action_shape
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n_state = args.state_shape
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trans_count_prior = np.ones((n_state, n_action, n_state))
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rew_mean_prior = np.full((n_state, n_action), args.rew_mean_prior)
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rew_std_prior = np.full((n_state, n_action), args.rew_std_prior)
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policy: PSRLPolicy = PSRLPolicy(
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trans_count_prior=trans_count_prior,
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rew_mean_prior=rew_mean_prior,
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rew_std_prior=rew_std_prior,
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action_space=env.action_space,
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discount_factor=args.gamma,
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epsilon=args.eps,
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add_done_loop=args.add_done_loop,
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)
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# collector
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train_collector = Collector(
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policy,
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train_envs,
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VectorReplayBuffer(args.buffer_size, len(train_envs)),
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exploration_noise=True,
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)
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train_collector.reset()
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test_collector = Collector(policy, test_envs)
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test_collector.reset()
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# Logger
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log_path = os.path.join(args.logdir, args.task, "psrl")
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writer = SummaryWriter(log_path)
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writer.add_text("args", str(args))
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logger: WandbLogger | TensorboardLogger | LazyLogger
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if args.logger == "wandb":
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logger = WandbLogger(save_interval=1, project="psrl", name="wandb_test", config=args)
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logger.load(writer)
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elif args.logger == "tensorboard":
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logger = TensorboardLogger(writer)
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else:
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logger = LazyLogger()
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def stop_fn(mean_rewards: float) -> bool:
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return mean_rewards >= args.reward_threshold
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train_collector.collect(n_step=args.buffer_size, random=True)
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# trainer, test it without logger
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result = OnpolicyTrainer(
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policy=policy,
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train_collector=train_collector,
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test_collector=test_collector,
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max_epoch=args.epoch,
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step_per_epoch=args.step_per_epoch,
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repeat_per_collect=1,
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episode_per_test=args.test_num,
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batch_size=0,
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episode_per_collect=args.episode_per_collect,
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stop_fn=stop_fn,
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logger=logger,
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test_in_train=False,
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).run()
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assert result.best_reward >= args.reward_threshold
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