def train():
parser = argparse.ArgumentParser()
parser.add_argument('--policy', type=str, default='td3')
parser.add_argument('--policy_type', type=str, default='mlp')
parser.add_argument('--env', type=str, default='HalfCheetah-v3')
parser.add_argument('--hidden_sizes', nargs='+', type=int)
# parser.add_argument('--layers_len', type=int, default=2)
# parser.add_argument('--hidden_size', type=int, default=256)
parser.add_argument('--seed', '-s', type=int, default=0)
parser.add_argument('--start_timesteps', type=int, default=int(25e3))
parser.add_argument('--gamma', type=float, default=0.99)
parser.add_argument('--epochs', type=int, default=250)
parser.add_argument('--steps_per_epoch', type=int, default=5000)
parser.add_argument('--max_episode_len', type=int, default=1000)
parser.add_argument('--buffer_size', type=int, default=int(1e6))
parser.add_argument('--save_freq', type=int, default=10)
parser.add_argument('--pi_lr', type=float, default=1e-3)
parser.add_argument('--q_lr', type=float, default=1e-3)
parser.add_argument('--expl_noise', type=float, default=0.1)
parser.add_argument('--batch_size', type=int, default=100)
parser.add_argument('--tau', type=float, default=0.005)
parser.add_argument('--policy_noise', type=float, default=0.2)
parser.add_argument('--policy_freq', type=int, default=2)
parser.add_argument('--noise_clip', type=float, default=0.5)
parser.add_argument('--device', type=str, default='cuda:0')
parser.add_argument('--cpu', type=int, default=1)
parser.add_argument('--datestamp', action='store_true')
parser.add_argument('--obs_norm', action='store_true')
parser.add_argument('--obs_clip', type=float, default=5.0)
args = parser.parse_args()
if args.cpu > 1:
args.policy = 'mp_' + args.policy
file_name = f'{args.policy}_{args.env}_{args.seed}'
print('-----' * 8)
print(f'Policy: {args.policy}, Env: {args.env}, Seed: {args.seed}')
print('-----' * 8)
if not os.path.exists(DEFAULT_MODEL_DIR):
os.makedirs(DEFAULT_MODEL_DIR)
# Setup logger and save config
logger_kwargs = setup_logger_kwargs(f'{args.policy}_{args.env}',
args.seed,
datestamp=args.datestamp)
logger = EpochLogger(**logger_kwargs)
logger.save_config(args)
# Init Envirorment
env = make_envs(args.env, args.cpu, args.seed)
obs_dim = env.observation_space.shape
act_dim = env.action_space.shape
# Set Seeds
np.random.seed(args.seed)
torch.manual_seed(args.seed)
kwargs = {
'env': env,
'actor_critic': MLPDetActorCritic,
# 'ac_kwargs': dict(hidden_sizes=[args.hidden_size]*args.layers_len),
# 'ac_kwargs': dict(hidden_sizes=[400, 300]),
'ac_kwargs': dict(hidden_sizes=args.hidden_sizes,
pso_kwargs=pso_kwargs),
'gamma': args.gamma,
'batch_size': args.batch_size,
'tau': args.tau,
'expl_noise': args.expl_noise,
'policy_noise': args.policy_noise,
'policy_freq': args.policy_freq,
'pi_lr': args.pi_lr,
'q_lr': args.q_lr,
'noise_clip': args.noise_clip,
'device': args.device,
'logger': logger
}
policy = TD3(**kwargs) if args.policy_type == 'mlp' else TD3(**kwargs)
# Count variables
if args.policy_type == 'mlp':
var_counts = tuple(
core.count_vars(module)
for module in [policy.ac.pi, policy.ac.q1, policy.ac.q2])
logger.log(
'\nNumber of parameters: \t pi: %d, \t q1: %d, \t q2: %d\n' %
var_counts)
else:
var_counts = core.count_vars(policy.ac)
logger.log('\nNumber of parameters: \t pi_q1_q2: %d\n' % var_counts)
# Set up model saving
logger.setup_pytorch_saver(policy.ac.state_dict())
buf = core.ReplayBuffer(obs_dim,
act_dim,
size=args.buffer_size,
device=args.device)
# Prepare for interaction with environment
total_steps = args.steps_per_epoch * args.epochs
start_time = time.time()
obs, done = env.reset(), [False for _ in range(args.cpu)]
if args.obs_norm:
ObsNormal = core.ObsNormalize(
obs_dim, args.cpu, args.obs_clip) # Normalize the observation
obs = ObsNormal.normalize_all(obs)
episode_rew = np.zeros(args.cpu, dtype=np.float32)
episode_len = np.zeros(args.cpu)
# Main loop: collect experience in env and update/log each epoch
for t in range(0, total_steps, args.cpu):
# Until start_steps have elapsed, randomly sample actions
# from a uniform distribution for better exploration. Aferwards,
# use the learned policy (with some noise, via act_noise)
if t < args.start_timesteps:
act = env.action_space.sample()[None]
else:
act = policy.select_action(obs)
# Step the env
if args.cpu == 1:
next_obs, ret, done, info = env.step(act.squeeze(axis=0))
else:
next_obs, ret, done, info = env.step(act)
if args.obs_norm:
next_obs = ObsNormal.normalize_all(next_obs)
episode_rew += rew
episode_len += 1
# Ignore the done "done" signal if it comes from hitting the time
# horizon (that is , when it's an artificial terinal signal
# that isn't based on the agent's state
for idx, d in enumerate(done):
done[
idx] = False if episode_len[idx] == args.max_episode_len else d
# Store experience to repaly buffer
buf.add(obs, act, rew, next_obs, done)
# Super critical, easy to overlook step: make sure to update
# most recent observation!
obs = next_obs
for idx in range(args.cpu):
if done[idx] or (episode_len[idx] == args.max_episode_len):
logger.store(EpRet=episode_rew[idx], EpLen=episode_len[idx])
obs, episode_rew[idx], episode_len[idx] = env.reset(idx), 0, 0
# Update handling
# Update every timesteps or Update 50 times each 50 timesteps
if t > args.start_timesteps:
batch = buf.sample(args.batch_size)
policy.update(batch)
# End of epoch handling
if t >= args.start_timesteps and (t + 1) % args.steps_per_epoch == 0:
epoch = (t + 1) // args.steps_per_epoch
# Test the performance of the deterministic version of the agent
policy.eval_policy(args.env, args.seed)
# Log info about epoch
logger.log_tabular('Exp', file_name)
logger.log_tabular('Epoch', epoch)
logger.log_tabular('EpRet', with_min_and_max=True)
logger.log_tabular('TestEpRet', with_min_and_max=True)
logger.log_tabular('EpLen', average_only=True)
logger.log_tabular('TestEplen', average_only=True)
logger.log_tabular('TotalEnvInteracts', t + 1)
logger.log_tabular('Q1Vals', with_min_and_max=True)
logger.log_tabular('Q2Vals', with_min_and_max=True)
logger.log_tabular('LossPi', average_only=True)
logger.log_tabular('LossQ', average_only=True)
logger.log_tabular('Time', (time.time() - start_time) / 60)
if args.obs_norm:
logger.log_tabular('obs_mean', ObsNormal.mean.mean())
logger.log_tabular('obs_std', np.sqrt(ObsNormal.var).mean())
logger.dump_tabular()
# Save model
if (epoch % args.save_freq == 0) or (epoch == args.epochs):
logger.save_state(
dict(obs_normal=ObsNormal if args.obs_norm else None),
None)
def ppo():
parser = argparse.ArgumentParser()
parser.add_argument('--policy', type=str, default='ppo')
parser.add_argument('--env', type=str, default='HalfCheetah-v3')
parser.add_argument('--hidden', type=int, default=64)
parser.add_argument('--layers_len', type=int, default=2)
parser.add_argument('--gamma', type=float, default=0.99)
parser.add_argument('--clip_ratio', type=float, default=0.2)
parser.add_argument('--pi_lr', type=float, default=3e-4)
parser.add_argument('--vf_lr', type=float, default=1e-3)
parser.add_argument('--train_pi_iters', type=int, default=80)
parser.add_argument('--train_v_iters', type=int, default=80)
parser.add_argument('--lam', type=float, default=0.97)
parser.add_argument('--target_kl', type=float, default=0.01)
parser.add_argument('--device', type=str, default='cuda:3')
parser.add_argument('--datestamp', action='store_true')
parser.add_argument('--seed', '-s', type=int, default=0)
parser.add_argument('--cpu', type=int, default=1)
parser.add_argument('--step_per_epoch', type=int, default=4000)
parser.add_argument('--max_episode_len', type=int, default=1000)
parser.add_argument('--epochs', type=int, default=250)
parser.add_argument('--max_timesteps', type=int, default=1e6)
parser.add_argument('--save_freq', type=int, default=10)
parser.add_argument('--obs_norm', action='store_true')
parser.add_argument('--obs_clip', type=float, default=5.0)
parser.add_argument('--use_clipped_value_loss', action='store_true')
parser.add_argument('--clip_val_param', type=float, default=80.0)
args = parser.parse_args()
file_name = f'{args.policy}_{args.env}_{args.seed}'
print('-----' * 8)
print(f'Policy: {args.policy}, Env: {args.env}, Seed: {args.seed}')
print('-----' * 8)
if not os.path.exists(DEFAULT_MODEL_DIR):
os.makedirs(DEFAULT_MODEL_DIR)
# Set up logger and save configuration
logger_kwargs = setup_logger_kwargs(f'{args.policy}_{args.env}',
args.seed,
datestamp=args.datestamp)
logger = EpochLogger(**logger_kwargs)
logger.save_config(args)
# Init Envirorment
env = gym.make(args.env)
obs_dim = env.observation_space.shape
act_dim = env.action_space.shape
# Set seeds
env.seed(args.seed)
torch.manual_seed(args.seed)
np.random.seed(args.seed)
env.action_space.seed(args.seed)
kwargs = {
"env": env,
"actor_critic": core.MLPActorCritic,
"ac_kwargs": dict(hidden_sizes=[args.hidden] * args.layers_len),
"gamma": args.gamma,
"clip_ratio": args.clip_ratio,
"pi_lr": args.pi_lr,
"vf_lr": args.vf_lr,
"train_pi_iters": args.train_pi_iters,
"train_v_iters": args.train_v_iters,
"lam": args.lam,
"target_kl": args.target_kl,
"use_clipped_value_loss": args.use_clipped_value_loss,
"clip_val_param": args.clip_val_param,
"device": args.device,
"logger": logger
}
policy = PPO(**kwargs)
# Count variables
var_counts = tuple(
core.count_vars(module) for module in [policy.ac.pi, policy.ac.v])
logger.log('\nNumber of parameters: \t pi: %d, \t v: %d\n' % var_counts)
# Set up model saving
logger.setup_pytorch_saver(policy.ac.state_dict())
local_steps_per_epoch = int(args.step_per_epoch)
buf = core.PPOBuffer( #Param
obs_dim, act_dim, local_steps_per_epoch, args.gamma, args.lam)
# Prepare for interaction with environment
start_time = time.time()
obs, done = env.reset(), False
if args.obs_norm:
ObsNormal = core.ObsNormalize(
obs.shape, args.obs_clip) # Normalize the observation
obs = ObsNormal.normalize(obs)
episode_ret = 0.
episode_len = 0.
# Main loop: collect experience in env and update/log each epoch
for epoch in range(args.epochs):
for t in range(local_steps_per_epoch):
act, val, logp = policy.step(obs)
next_obs, ret, done, _ = env.step(act)
if args.obs_norm:
next_obs = ObsNormal.normalize(next_obs)
episode_ret += ret
episode_len += 1
# save and log
buf.add(obs, act, ret, val, logp)
logger.store(VVals=val)
# Update obs (critical!)
obs = next_obs
timeout = episode_len == args.max_episode_len
terminal = done or timeout
epoch_ended = t == local_steps_per_epoch - 1
if epoch_ended or terminal:
if epoch_ended and not terminal:
print(
f'Warning: Trajectory cut off by epoch at {episode_len} steps',
flush=True)
# if trajectory didn't reach terminal state, bootstrap value target
if timeout or epoch_ended:
_, val, _ = policy.step(obs)
else:
val = 0
buf.finish_path(val)
if terminal:
# only save EpRet / EpLen if trajectory finished
logger.store(EpRet=episode_ret, EpLen=episode_len)
obs, episode_ret, episode_len = env.reset(), 0, 0
# if args.obs_norm: obs = ObsNormal.normalize(obs)
policy.update(buf)
# Log info about epoch
logger.log_tabular('Exp', file_name)
logger.log_tabular('Epoch', epoch)
logger.log_tabular('EpRet', with_min_and_max=True)
logger.log_tabular('EpLen', average_only=True)
logger.log_tabular('VVals', with_min_and_max=True)
logger.log_tabular('TotalEnvInteracts',
(epoch + 1) * args.step_per_epoch)
logger.log_tabular('LossPi', average_only=True)
logger.log_tabular('LossV', average_only=True)
logger.log_tabular('DeltaLossPi', average_only=True)
logger.log_tabular('DeltaLossV', average_only=True)
logger.log_tabular('Entropy', average_only=True)
logger.log_tabular('KL', average_only=True)
logger.log_tabular('ClipFrac', average_only=True)
logger.log_tabular('StopIter', average_only=True)
logger.log_tabular('Time', int((time.time() - start_time) / 60))
if args.obs_norm:
logger.log_tabular('obs_mean', ObsNormal.mean.mean())
logger.log_tabular('obs_std', np.sqrt(ObsNormal.var).mean())
logger.dump_tabular()
# Save model
if (epoch % args.save_freq == 0) or (epoch == args.epochs - 1):
torch.save(policy.ac.state_dict(),
f'{DEFAULT_MODEL_DIR}/{file_name}.pth')
logger.save_state({'env': env}, None)
def train():
parser = argparse.ArgumentParser()
parser.add_argument('--policy', type=str, default='ppo')
parser.add_argument('--policy_type', type=str, default='mlp')
parser.add_argument('--env', type=str, default='HalfCheetah-v3')
parser.add_argument('--hidden', type=int, default=64)
parser.add_argument('--layers_len', type=int, default=2)
parser.add_argument('--gamma', type=float, default=0.99)
parser.add_argument('--clip_ratio', type=float, default=0.2)
parser.add_argument('--pi_lr', type=float, default=3e-4)
parser.add_argument('--vf_lr', type=float, default=1e-3)
parser.add_argument('--train_pi_iters', type=int, default=80)
parser.add_argument('--train_v_iters', type=int, default=80)
parser.add_argument('--lam', type=float, default=0.97)
parser.add_argument('--target_kl', type=float, default=0.01)
parser.add_argument('--device', type=str, default='cuda:3')
parser.add_argument('--seed', '-s', type=int, default=0)
parser.add_argument('--cpu', type=int, default=4)
parser.add_argument('--datestamp', action='store_true')
parser.add_argument('--steps_per_epoch', type=int, default=4000)
parser.add_argument('--max_episode_len', type=int, default=1000)
parser.add_argument('--epochs', type=int, default=250)
parser.add_argument('--max_timesteps', type=int, default=1e6)
parser.add_argument('--save_freq', type=int, default=10)
parser.add_argument('--obs_norm', action='store_true')
parser.add_argument('--obs_clip', type=float, default=5.0)
parser.add_argument('--use_clipped_value_loss', action='store_true')
parser.add_argument('--clip_val_param', type=float, default=80.0)
args = parser.parse_args()
if args.cpu > 1: args.policy = 'mp_' + args.policy
file_name = f'{args.policy}_{args.env}_{args.seed}'
print('-----' * 8)
print(f'Policy: {args.policy}, Env: {args.env}, Seed: {args.seed}')
print('-----' * 8)
if not os.path.exists(DEFAULT_MODEL_DIR):
os.makedirs(DEFAULT_MODEL_DIR)
# Set up logger and save configuration
logger_kwargs = setup_logger_kwargs(f'{args.policy}_{args.env}',
args.seed,
datestamp=args.datestamp)
logger = EpochLogger(**logger_kwargs)
logger.save_config(args)
# Init Envirorment
env = make_envs(
args.env, args.cpu,
args.seed) # SingleEnv Wrapper and env.seed env.action_space seed
obs_dim = env.observation_space.shape
act_dim = env.action_space.shape if isinstance(env.action_space,
gym.spaces.Box) else (1, )
# Set seeds
torch.manual_seed(args.seed)
np.random.seed(args.seed)
kwargs = {
"env":
env,
"actor_critic":
core.CNNActorCritic
if args.policy_type == 'cnn' else core.MLPActorCritic,
"ac_kwargs":
dict(hidden_sizes=[args.hidden] * args.layers_len),
"gamma":
args.gamma,
"clip_ratio":
args.clip_ratio,
"pi_lr":
args.pi_lr,
"vf_lr":
args.vf_lr,
"train_pi_iters":
args.train_pi_iters,
"train_v_iters":
args.train_v_iters,
"lam":
args.lam,
"target_kl":
args.target_kl,
"use_clipped_value_loss":
args.use_clipped_value_loss,
"clip_val_param":
args.clip_val_param,
"device":
args.device,
"logger":
logger
}
policy = PPO(**kwargs)
# policy.ac.share_memory()
# Count variables
var_counts = tuple(
core.count_vars(module) for module in [policy.ac.pi, policy.ac.v])
logger.log('\nNumber of parameters: \t pi: %d, \t v: %d\n' % var_counts)
# Set up model saving
logger.setup_pytorch_saver(policy.ac.state_dict())
local_steps_per_epoch = int(args.steps_per_epoch / args.cpu)
buf = core.PPO_mp_Buffer(obs_dim, act_dim, local_steps_per_epoch,
args.gamma, args.lam, args.cpu, args.device)
# Prepare for interaction with environment
start_time = time.time()
obs, done = env.reset(), [False for _ in range(args.cpu)]
if args.obs_norm:
ObsNormal = core.ObsNormalize(
obs_dim, args.cpu, args.obs_clip) # Normalize the observation
obs = ObsNormal.normalize_all(obs)
episode_ret = np.zeros(args.cpu, dtype=np.float32)
episode_len = np.zeros(args.cpu)
# Main loop: collect experience in env and update/log each epoch
for epoch in range(args.epochs):
for t in range(local_steps_per_epoch):
act, val, logp = policy.step(obs)
next_obs, ret, done, info = env.step(act)
if args.obs_norm:
next_obs = ObsNormal.normalize_all(next_obs)
episode_ret += ret
episode_len += 1
# save and log
buf.add(obs, act, ret, val, logp)
logger.store(VVals=val)
# Update obs (critical!)
obs = next_obs
# In multiprocess env when a episode is terminal it will automatic reset(This has been removed because hard to reset())
# the next_obs is the obs after reset,the real obs that cause terminal is stored in info['terminal_observation'] | updata: automatic reset has been removed
timeout = episode_len == args.max_episode_len
terminal = done + timeout
epoch_ended = t == local_steps_per_epoch - 1
# 感觉写的太臃肿了，暂时没想到好的写法
for idx in range(args.cpu):
if epoch_ended or terminal[idx]:
if epoch_ended and not terminal[idx]:
print(
f'Warning: Trajectory {idx} cut off by epoch at {episode_len[idx]} steps',
flush=True)
# if trajectory didn't reach terminal state, bootstrap value target
if timeout[idx] or epoch_ended:
_, val, _ = policy.step(obs[idx][None])
else:
val = 0
buf.finish_path(val, idx)
if terminal[idx]:
# only save EpRet / EpLen if trajectory finished
logger.store(EpRet=episode_ret[idx],
EpLen=episode_len[idx])
obs[idx], episode_ret[idx], episode_len[idx] = env.reset(
idx), 0, 0
# if args.obs_norm: obs = ObsNormal.normalize(obs)
# During Experiment, I find that reset state without Normalize will perform better
policy.update(buf)
# Log info about epoch
logger.log_tabular('Exp', file_name)
logger.log_tabular('Epoch', epoch)
logger.log_tabular('EpRet', with_min_and_max=True)
logger.log_tabular('EpLen', average_only=True)
logger.log_tabular('VVals', with_min_and_max=True)
logger.log_tabular('TotalEnvInteracts',
(epoch + 1) * args.steps_per_epoch)
logger.log_tabular('LossPi', average_only=True)
logger.log_tabular('LossV', average_only=True)
logger.log_tabular('DeltaLossPi', average_only=True)
logger.log_tabular('DeltaLossV', average_only=True)
logger.log_tabular('Entropy', average_only=True)
logger.log_tabular('KL', average_only=True)
logger.log_tabular('ClipFrac', average_only=True)
logger.log_tabular('StopIter', average_only=True)
logger.log_tabular('Time', int((time.time() - start_time) // 60))
if args.obs_norm:
logger.log_tabular('obs_mean', ObsNormal.mean.mean())
logger.log_tabular('obs_std', np.sqrt(ObsNormal.var).mean())
logger.dump_tabular()
# Save model
if (epoch % args.save_freq == 0) or (epoch == args.epochs - 1):
torch.save(policy.ac.state_dict(),
f'{DEFAULT_MODEL_DIR}/{file_name}.pth')
logger.save_state(
dict(obs_normal=ObsNormal if args.obs_norm else None), None)
parser.add_argument('--obs_clip', type=float, default=5.0)
parser.add_argument('--use_clipped_value_loss', action='store_true')
parser.add_argument('--clip_val_param', type=float, default=80.0)
args = parser.parse_args()
file_name = f'{args.policy}_{args.env}_{args.seed}'
print('-----' * 8)
print(f'Policy: {args.policy}, Env: {args.env}, Seed: {args.seed}')
print('-----' * 8)
if not os.path.exists(DEFAULT_MODEL_DIR):
os.makedirs(DEFAULT_MODEL_DIR)
# Set up logger and save configuration
logger_kwargs = setup_logger_kwargs(f'{args.policy}_{args.env}',
args.seed,
datestamp=args.datestamp)
logger = EpochLogger(**logger_kwargs)
logger.save_config(args)
# Init Envirorment
env = make_mp_envs(args.env, args.cpu, args.seed)
obs_dim = env.observation_space.shape
act_dim = env.action_space.shape
# Set seeds
torch.manual_seed(args.seed)
np.random.seed(args.seed)
kwargs = {
"env": env,