LEARN_FREQ = 4
# quantile and option numbers for QUOTA
N_QUANT = 200
N_OPTIONS = 10
'''Environment Settings'''
# number of environments for C51
N_ENVS = 16
# Total simulation step
STEP_NUM = int(1e+8)
# gamma for MDP
GAMMA = 0.99
# visualize for agent playing
RENDERING = False
# openai gym env name
ENV_NAME = args.games + 'NoFrameskip-v4'
env = SubprocVecEnv([wrap_cover(ENV_NAME) for i in range(N_ENVS)])
N_ACTIONS = env.action_space.n
N_STATES = env.observation_space.shape
'''Training settings'''
# check GPU usage
USE_GPU = torch.cuda.is_available()
print('USE GPU: ' + str(USE_GPU))
# mini-batch size
BATCH_SIZE = 32
# learning rage
LR = 1e-4
# epsilon-greedy
EPSILON = 1.0
EPSILON_O = 1.0
# option paramater
Target_beta = 0.01
def train(args):
print(args)
torch.manual_seed(args.seed)
np.random.seed(args.seed)
if args.return_function == "GAE":
return_function = GAE
elif args.return_function == "Q":
return_function = Q
elif args.return_function == "A":
return_function = A
MONTE_CARLO = True if args.num_steps == 200 else False
envs = SubprocVecEnv(
[make_env(args.env, i + args.num_envs) for i in range(args.num_envs)],
MONTE_CARLO)
test_env = gym.make(args.env)
test_env.seed(args.seed + args.num_envs)
policy = ActorCriticMLP(input_dim=envs.observation_space.shape[0],
n_acts=envs.action_space.n)
optim = torch.optim.Adam(params=policy.parameters(),
lr=args.lr,
weight_decay=args.weight_decay)
test_rewards = []
steps = 1
obs = torch.from_numpy(envs.reset())
while steps < args.max_steps:
logp_actions = []
state_values = []
rewards = []
masks = []
for _ in range(args.num_steps):
probs, state_value = policy.forward(obs)
dist = Categorical(probs)
action = dist.sample()
obs, reward, done, _ = envs.step(action.numpy())
logp_actions.append(dist.log_prob(action).unsqueeze(1))
state_values.append(state_value)
rewards.append(torch.FloatTensor(reward).unsqueeze(1))
masks.append(torch.FloatTensor(1 - done).unsqueeze(1))
obs = torch.from_numpy(obs)
steps += 1
if steps % args.test_every == 0:
test_reward = np.mean(
[test(test_env, policy) for _ in range(10)])
test_rewards.append(test_reward)
print(f"Running reward at timestep {steps}: and {test_reward}")
if (1 - done).sum() == 0:
break
next_value = 0
if not (1 - done).sum() == 0:
_, next_value = policy(obs)
returns = return_function(next_value, rewards, masks, state_values,
args)
loss = policy_gradient(logp_actions, returns)
optim.zero_grad()
loss.backward()
optim.step()
# if monte carlo, we need to reset the environment by hand
if MONTE_CARLO:
obs = torch.from_numpy(envs.reset())
return test_rewards
if __name__ == '__main__':
args = parser.parse_args()
print(args)
tf.set_random_seed(args.seed)
np.random.seed(args.seed)
if not os.path.exists(args.log_dir):
os.makedirs(args.log_dir)
def make_env(rank):
def env_fn():
env = gym.make('{}NoFrameskip-v4'.format(args.env_name))
env.seed(args.seed + rank)
env = Monitor(
env, osp.join(args.log_dir, "{}.monitor.json".format(rank)))
gym.logger.setLevel(logging.WARN)
return wrap_deepmind(env, num_skips=args.num_skips)
return env_fn
env = SubprocVecEnv([make_env(i) for i in range(args.nenvs)])
policy = CnnPolicy
learn(policy,
env,
args.seed,
args.num_skips,
args.model_path,
gamma=args.gamma)
return rewards
if __name__ == '__main__':
logger.configure(f'{C.env_id}/logs_{time_stamp}')
for k, v in C._asdict().items():
logger.record_tabular(k, v)
logger.dump_tabular()
max_reward = tf.placeholder(tf.float32, name='max_reward')
mean_reward = tf.placeholder(tf.float32, name='mean_reward')
max_summary = tf.summary.scalar('max_rew', max_reward)
mean_summary = tf.summary.scalar('mean_rew', mean_reward)
with create_session(0) as sess:
eval_env = make_atari(C.env_id, 113, 'eval')()
envs = SubprocVecEnv(
[make_atari(C.env_id, r + 1, 'train') for r in range(4)])
model = Model(eval_env.observation_space.shape,
eval_env.action_space.n)
runner = Runner(envs, model.policy, nb_rollout=C.nb_rollout)
sess.run(tf.global_variables_initializer())
writer = tf.summary.FileWriter(
'./{}/summary/{}'.format(C.env_id, time_stamp), sess.graph)
for i in range(C.iterations):
if i % C.eval_freq == 0:
rewards = evaluate(eval_env, model.policy, C.eval_episodes)
logger.log(
f'Step: {i} | Max reward: {np.max(rewards)} | Mean reward: {np.mean(rewards):.2f} | Std: {np.std(rewards):.2f}'
)
me, ma = sess.run([mean_summary, max_summary],
feed_dict={