def train(env, nb_epochs, nb_epoch_cycles, render_eval, reward_scale, render, param_noise, actor,
critic, normalize_returns, normalize_observations, critic_l2_reg, actor_lr, critic_lr,
action_noise, popart, gamma, clip_norm, nb_train_steps, nb_rollout_steps, nb_eval_steps,
batch_size, memory, tau=0.01, eval_env=None, param_noise_adaption_interval=50,
gamma_reward_shaping=0.1, start_reward_shaping=10000):
logger.info(sys._getframe().f_code.co_name)
rank = MPI.COMM_WORLD.Get_rank()
assert (np.abs(env.action_space.low) == env.action_space.high).all()
max_action = env.action_space.high
logger.info("scale actions by {} before executing in env".format(max_action))
agent = DDPG(actor, critic, memory, env.observation_space.shape, env.action_space.shape,
gamma=gamma, tau=tau, normalize_returns=normalize_returns,
normalize_observations=normalize_observations, batch_size=batch_size, action_noise=action_noise,
param_noise=param_noise, critic_l2_reg=critic_l2_reg, actor_lr=actor_lr, critic_lr=critic_lr,
enable_popart=popart, clip_norm=clip_norm, reward_scale=reward_scale)
logger.info("Using agent with the following configuration:")
logger.info(str(agent.__dict__.items()))
if rank == 0:
saver = tf.train.Saver()
else:
saver = None
step = 0
episode = 0
eval_episode_rewards_history = deque(maxlen=100)
episode_rewards_history = deque(maxlen=100)
with U.single_threaded_session() as sess:
agent.initialize(sess)
sess.graph.finalize()
agent.reset()
obs = env.reset()
if eval_env is not None:
eval_obs = eval_env.reset()
done = False
episode_reward = 0.
episode_step = 0
episodes = 0
t = 0
epoch = 0
start_time = time.time()
epoch_episode_rewards = []
epoch_episode_steps = []
epoch_episode_eval_rewards = []
epoch_episode_eval_steps = []
epoch_start_time = time.time()
epoch_actions = []
epoch_qs = []
epoch_episodes = 0
episode_sample = []
for epoch in range(nb_epochs):
for cycle in range(nb_epoch_cycles):
for t_rollout in range(nb_eval_steps):
action, q = agent.pi(obs, apply_noise=True, compute_Q=True)
assert action.shape == env.action_space.shape
if rank == 0 and render:
env.render()
assert max_action.shape == action.shape
new_obs, r, done, info = env.step(max_action * action)
t += 1
if rank == 0 and render:
env.render()
episode_reward += r
episode_step += 1
epoch_actions.append(action)
epoch_qs.append(q)
episode_sample.append((obs, action, r, new_obs, done))
if t <= start_reward_shaping:
agent.store_transition(obs, action, r, new_obs, done)
if done:
if t > start_reward_shaping:
logger.info("start reward shaping")
reward = r
agent.store_transition(obs, action, reward, new_obs, done)
# episode_sample.append()
for i in range(len(episode_sample) - 1):
obs_tmp, action_tmp, rew_tmp, new_obs_tmp, done_tmp = \
episode_sample[len(episode_sample) - i - 1]
reward = round(reward * gamma_reward_shaping, 5)
reward = reward + rew_tmp
agent.store_transition(obs_tmp, action_tmp, reward, new_obs_tmp, done)
epoch_episode_rewards.append(episode_reward)
episode_rewards_history.append(episode_reward)
epoch_episode_steps.append(episode_step)
episode_reward = 0.
episode_step = 0
epoch_episodes += 1
episodes += 1
agent.reset()
obs = env.reset()
obs = new_obs
epoch_actor_losses = []
epoch_critic_losses = []
epoch_adaptive_distances = []
for t_train in range(nb_train_steps):
if memory.nb_entries >= batch_size and t_train % param_noise_adaption_interval == 0:
distance = agent.adapt_param_noise()
epoch_adaptive_distances.append(distance)
cl, al = agent.train()
epoch_critic_losses.append(cl)
epoch_actor_losses.append(al)
agent.update_target_net()
eval_episode_rewards = []
eval_qs = []
if eval_env is not None:
eval_episode_reward = 0.
for t_rollout in range(nb_eval_steps):
eval_action, eval_q = agent.pi(eval_obs, apply_noise=False, compute_Q=True)
eval_obs, eval_r, eval_done, eval_info = eval_env.step(max_action * eval_action)
if render_eval:
eval_env.render()
eval_episode_reward += eval_r
eval_qs.append(eval_q)
if eval_done:
eval_obs = eval_env.reset()
eval_episode_rewards.append(eval_episode_reward)
eval_episode_rewards_history.append(eval_episode_reward)
eval_episode_reward = 0.
mpi_size = MPI.COMM_WORLD.Get_size()
duration = time.time() - start_time
stats = agent.get_stats()
combined_stats = stats.copy()
combined_stats["rollout/return"] = np.mean(epoch_episode_rewards)
combined_stats["rollout/return_history"] = np.mean(episode_rewards_history)
combined_stats["rollout/episode_steps"] = np.mean(epoch_episode_steps)
combined_stats["rollout/actions_mean"] = np.mean(epoch_actions)
combined_stats["rollout/Q_mean"] = np.mean(epoch_qs)
combined_stats["train/loss_actor"] = np.mean(epoch_actor_losses)
combined_stats["train/loss_critic"] = np.mean(epoch_critic_losses)
combined_stats["train/param_noise_distance"] = np.mean(epoch_adaptive_distances)
combined_stats["total/duration"] = duration
combined_stats["total/steps_per_second"] = float(t) / float(duration)
combined_stats["total/episodes"] = episodes
combined_stats["rollout/episodes"] = epoch_episodes
combined_stats["rollour/actions_std"] = np.std(epoch_actions)
if eval_env is not None:
combined_stats["eval/return"] = eval_episode_rewards
combined_stats["eval/return_history"] = np.mean(eval_episode_rewards_history)
combined_stats["eval/Q"] = eval_qs
combined_stats["eval/episodes"] = len(eval_episode_rewards)
def as_scalar(x):
if isinstance(x, np.ndarray):
assert x.size == 1
return x[0]
elif np.isscalar(x):
return x
else:
raise ValueError("expected scalar, got %s" % x)
combined_stats_sums = MPI.COMM_WORLD.allreduce(np.array([as_scalar(x)
for x in combined_stats.values()]))
combined_stats = {k : v / mpi_size for (k, v) in zip(combined_stats.keys(), combined_stats_sums)}
combined_stats["total/epochs"] = epoch + 1
combined_stats["total/steps"] = t
for key in sorted(combined_stats.keys()):
logger.record_tabular(key, combined_stats[key])
logger.dump_tabular()
logger.info("")
logdir = logger.get_dir()
if rank == 0 and logdir:
if hasattr(env, "get_state"):
with open(os.path.join(logdir, "env_state.pkl"), "wb") as f:
pickle.dump(env.get_state(), f)
if eval_env and hasattr(eval_env, "get_state"):
with open(os.path.join(logdir, "eval_env_state.pkl"), "wb") as f:
pickle.dump(eval_env.get_state(), f)
def Test(env,
nb_epochs,
nb_epoch_cycles,
render_eval,
reward_scale,
render,
param_noise,
actor,
critic,
normalize_returns,
normalize_observations,
critic_l2_reg,
actor_lr,
critic_lr,
action_noise,
popart,
gamma,
clip_norm,
nb_train_steps,
nb_rollout_steps,
nb_eval_steps,
batch_size,
memory,
tau=0.01,
eval_env=None,
param_noise_adaption_interval=50,
restore=False):
rank = MPI.COMM_WORLD.Get_rank()
max_action = np.array([0.2, 0.2, 0.2, 0.2, 0.2, 0.2])
logger.info(
'scaling actions by {} before executing in env'.format(max_action))
model_directory = '/home/rvsa/RL_project/Peg_in_Hole/1-baselines/baselines/ddpg/result/'
agent = DDPG(actor,
critic,
memory,
env.state_dim,
env.action_dim,
gamma=gamma,
tau=tau,
normalize_returns=normalize_returns,
normalize_observations=normalize_observations,
batch_size=batch_size,
action_noise=None,
param_noise=None,
critic_l2_reg=critic_l2_reg,
actor_lr=actor_lr,
critic_lr=critic_lr,
enable_popart=popart,
clip_norm=clip_norm,
reward_scale=reward_scale)
logger.info('Using agent with the following configuration:')
logger.info(str(agent.__dict__.items()))
"""Set up logging stuff only for a single worker"""
saver = tf.train.Saver()
# if rank == 0:
# saver = tf.train.Saver()
# else:
# saver = None
# eval_episode_rewards_history = deque(maxlen=100)
episode_rewards_history = deque(maxlen=100)
with U.single_threaded_session() as sess:
"""Prepare everything"""
if restore:
saver = tf.train.import_meta_graph(model_directory +
'model_fuzzy_new_3.meta')
agent.restore_model(model_directory, saver, sess)
else:
agent.initialize(sess)
sess.graph.finalize()
"""Agent Reset"""
agent.reset()
"""Force calibration"""
# env.robot_control.CalibFCforce()
learning_epochs = 15
delay_rate = np.power(10, 1 / learning_epochs)
"""Revise the last epochs"""
# last_epochs = 0
# actor_lr = actor_lr/np.power(delay_rate, last_epochs)
# critic_lr = critic_lr/np.power(delay_rate, last_epochs)
start_time = time.time()
epoch_episode_rewards = []
epoch_episode_steps = []
mean_rollout_time = []
mean_epoch_rewards = []
mean_epoch_steps = []
mean_epoch_time = []
epoch_adaptive_distances = []
epoch_actions = []
epoch_qs = []
epoch_episodes = 0
total_episodes = 0
successful_rate = []
Force_moments = np.zeros((1, 6))
for epoch in range(nb_epochs):
"""Show the result for cycle 20 times and Save the model"""
# epoch_actor_losses = []
# epoch_critic_losses = []
"""Delay the learning rate"""
# epoch_actor_lr = actor_lr/delay_rate
# epoch_critic_lr = critic_lr/delay_rate
epoch_start_time = time.time()
force_array = np.zeros((150, 6))
for cycle in range(nb_epoch_cycles):
"""environment reset """
agent.reset()
obs = env.reset()
episode_reward = 0.
done = False
rollout_start_time = time.time()
forcemoments = []
for t_rollout in range(nb_rollout_steps):
"""Predict next action"""
action, q = agent.pi(obs,
apply_noise=False,
compute_Q=True)
assert action.shape[0] == env.action_dim
"""scale for execution in env"""
new_obs, r, done, info = env.step(action, t_rollout)
logger.info("The maximum force:" +
str(max(abs(new_obs[0:3]))) +
" The maximum moments:" +
str(max(abs(new_obs[3:6]))))
episode_reward += r
force_array[t_rollout, :] = new_obs[0:6]
"""Plot the force and moments"""
if render:
forcemoments.append(new_obs[0:6])
Force_moments.append(new_obs[0:6])
env.plot_force(forcemoments, t_rollout + 1)
epoch_actions.append(action)
epoch_qs.append(q)
agent.store_transition(obs, action, r, new_obs, done)
obs = new_obs
"""Episode done and start pull the pegs step by step"""
if done:
logger.info('Peg-in-hole assembly done!!!')
epoch_episode_rewards.append(episode_reward)
episode_rewards_history.append(episode_reward)
epoch_episode_steps.append(t_rollout)
epoch_episodes += 1
pull_done = False
pull_safe = True
while pull_done is False and pull_safe:
pull_done, pull_safe = env.pull_up() # True env
# if pull_safe is False:
# logger.info('###############################################')
# logger.info('Pull up the pegs failed for the exceed force!!!')
# exit()
break
"""Episode failed and start pull the pegs step by step"""
if info is False:
logger.info(
'Peg-in-hole assembly failed for the exceed force!!!'
)
pull_done = False
pull_safe = True
while pull_done is False and pull_safe:
pull_done, pull_safe = env.pull_up() # True env
# if pull_safe is False:
# logger.info('###############################################')
# logger.info('Peg-in-hole assembly failed for the exceed force!!!')
# exit()
break
total_episodes += 1
roluout_time = time.time() - rollout_start_time
mean_rollout_time.append(roluout_time)
Force_moments = np.concatenate((Force_moments, force_array),
axis=0)
if t_rollout == nb_rollout_steps - 1:
logger.info(
'Peg-in-hole assembly failed for exceed steps!!!')
logger.info('The deepest position'.format(obs[8]))
"""train model for nb_train_steps times"""
# for t_train in range(nb_train_steps):
# cl, al = agent.train(epoch_actor_lr, epoch_critic_lr)
# epoch_critic_losses.append(cl)
# epoch_actor_losses.append(al)
# agent.update_target_net()
"""Save the force figure"""
env.save_figure(model_directory + str(cycle) +
'Force_figure.eps')
"""Save the memory data"""
# agent.save_data()
"""Adapt param noise, if necessary"""
# if memory.nb_entries >= batch_size and param_noise is not None:
# distance = agent.adapt_param_noise()
# epoch_adaptive_distances.append(distance)
"""write the result into the summary"""
# agent.log_scalar("actor_loss", mpi_mean(epoch_actor_losses), epoch_episodes)
# agent.log_scalar("critic_loss", mpi_mean(epoch_critic_losses), epoch_episodes)
# agent.log_scalar("episode_score", mpi_mean(epoch_episode_rewards), epoch_episodes)
# agent.log_scalar("episode_steps", mpi_mean(epoch_episode_steps), epoch_episodes)
"""Log stats."""
epoch_train_duration = time.time() - epoch_start_time
mean_epoch_time.append(epoch_train_duration)
"""Successful rate"""
successful_rate.append(epoch_episodes / total_episodes)
stats = agent.get_stats()
combined_stats = {}
for key in sorted(stats.keys()):
combined_stats[key] = mpi_mean(stats[key])
"""Rollout statistics. compute the mean of the total nb_epoch_cycles"""
combined_stats['rollout/rewards'] = mpi_mean(epoch_episode_rewards)
mean_epoch_rewards.append(mpi_mean(epoch_episode_rewards))
combined_stats['rollout/episode_steps'] = mpi_mean(
epoch_episode_steps)
mean_epoch_steps.append(mpi_mean(epoch_episode_steps))
# combined_stats['rollout/episodes'] = mpi_sum(epoch_episodes)
combined_stats['rollout/actions_mean'] = mpi_mean(epoch_actions)
combined_stats['rollout/actions_std'] = mpi_std(epoch_actions)
combined_stats['rollout/Q_mean'] = mpi_mean(epoch_qs)
"""Train statistics"""
# combined_stats['train/loss_actor'] = mpi_mean(epoch_actor_losses)
# combined_stats['train/loss_critic'] = mpi_mean(epoch_critic_losses)
# combined_stats['train/param_noise_distance'] = mpi_mean(epoch_adaptive_distances)
"""Total statistics"""
combined_stats['total/episodes'] = mpi_sum(epoch_episodes)
combined_stats['total/epochs'] = epoch + 1
"""Plot reward and steps"""
# env.plot_rewards(epoch_episode_rewards, epoch_episodes)
# env.plot_steps(epoch_episode_steps, epoch_episodes)
"""save the model and the result"""
# saver.save(sess, model_directory + 'model_truth_general')
"""Save data"""
pd_epoch_train_duration = pd.DataFrame(mean_epoch_time)
pd_epoch_train_duration.to_csv(
'data/large_duration_evaluation_before',
sep=',',
header=False,
index=False)
pd_rollout_time = pd.DataFrame(mean_rollout_time)
pd_rollout_time.to_csv('data/large_rollout_time_evaluation_before',
sep=',',
header=False,
index=False)
# pd_successful_rate = pd.DataFrame(successful_rate)
# pd_successful_rate.to_csv('data/successful_rate_evaluation_fail_1', sep=',', header=False, index=False)
pd_Force_and_moments = pd.DataFrame(Force_moments)
pd_Force_and_moments.to_csv(
"data/large_force_moments_evaluation_before",
sep=',',
header=False,
index=False)
re_rewards = pd.DataFrame(epoch_episode_rewards)
re_rewards.to_csv("data/large_re_true_rewards_evaluation_before",
sep=',',
header=False,
index=False)
re_steps = pd.DataFrame(epoch_episode_steps)
re_steps.to_csv("data/large_re_true_steps_evaluation_before",
sep=',',
header=False,
index=False)
for key in sorted(combined_stats.keys()):
logger.record_tabular(key, combined_stats[key])
logger.dump_tabular()
logger.info('')
logdir = logger.get_dir()
if rank == 0 and logdir:
if hasattr(env, 'get_state'):
with open(os.path.join(logdir, 'env_state.pkl'),
'wb') as f:
pickle.dump(env.get_state(), f)
if eval_env and hasattr(eval_env, 'get_state'):
with open(os.path.join(logdir, 'eval_env_state.pkl'),
'wb') as f:
pickle.dump(eval_env.get_state(), f)
def train(env,
nb_epochs,
nb_epoch_cycles,
reward_scale,
param_noise,
actor,
critic,
normalize_returns,
normalize_observations,
critic_l2_reg,
actor_lr,
critic_lr,
action_noise,
popart,
gamma,
clip_norm,
nb_train_steps,
nb_rollout_steps,
nb_eval_steps,
batch_size,
memory,
tau=0.01,
eval_env=None,
param_noise_adaption_interval=50,
render=False,
render_eval=False):
rank = MPI.COMM_WORLD.Get_rank()
assert (np.abs(env.action_space.low) == env.action_space.high
).all() # we assume symmetric actions.
max_action = env.action_space.high
logger.info(
'scaling actions by {} before executing in env'.format(max_action))
agent = DDPG(actor,
critic,
memory,
env.observation_space.shape,
env.action_space.shape,
gamma=gamma,
tau=tau,
normalize_returns=normalize_returns,
normalize_observations=normalize_observations,
batch_size=batch_size,
action_noise=action_noise,
param_noise=param_noise,
critic_l2_reg=critic_l2_reg,
actor_lr=actor_lr,
critic_lr=critic_lr,
enable_popart=popart,
clip_norm=clip_norm,
reward_scale=reward_scale)
logger.info('Using agent with the following configuration:')
logger.info(str(agent.__dict__.items()))
# Set up logging stuff only for a single worker.
if rank == 0:
saver = tf.train.Saver()
else:
saver = None
step = 0
episode = 0
eval_episode_rewards_history = deque(maxlen=100)
episode_rewards_history = deque(maxlen=100)
with U.single_threaded_session() as sess:
#saver.restore(sess, "C:/Users/AN95540/Desktop/ICRA2019/Codes/RobotPath-ddpg/model/epoch_33.ckpt")
# Prepare everything.
agent.initialize(sess)
#agent.continue_sess(sess)
sess.graph.finalize()
agent.reset()
obs = env.reset()
info = {'near_collision': False, 'near_limits': False}
if eval_env is not None:
eval_obs = eval_env.reset()
done = False
episode_reward = 0.
episode_step = 0
episodes = 0
t = 0
epoch = 0
start_time = time.time()
epoch_episode_rewards = []
epoch_episode_steps = []
epoch_episode_eval_rewards = []
epoch_episode_eval_steps = []
epoch_start_time = time.time()
epoch_actions = []
epoch_qs = []
epoch_episodes = 0
for epoch in range(nb_epochs):
for cycle in range(nb_epoch_cycles):
# Perform rollouts.
for t_rollout in range(nb_rollout_steps):
print('epoch:', epoch)
print('cycle:', cycle)
print('rollout:', t_rollout)
if epoch > 5:
time.sleep(0.1)
# Predict next action.
action, q = agent.pi(obs, apply_noise=True, compute_Q=True)
assert action.shape == env.action_space.shape
# Execute next action.
#if rank == 0 and render:
#env.render()
assert max_action.shape == action.shape
#new_obs, r, done, info = env.step(max_action * action) # scale for execution in env (as far as DDPG is concerned, every action is in [-1, 1])
#print(obs)
if info['near_collision'] or info[
'near_limits'] or epoch > 5:
new_obs, r, done, info = env.step(max_action * action)
else:
action = (obs[0:6] -
obs[6:12]) * 0.1 + np.random.rand(6) * 0.1
new_obs, r, done, info = env.step(action)
t += 1
if episode_step > 1000:
done = True
#if rank == 0 and render:
# env.render()
episode_reward += r
print('episode_reward:', episode_reward)
episode_step += 1
# Book-keeping.
epoch_actions.append(action)
epoch_qs.append(q)
agent.store_transition(obs, action, r, new_obs, done)
obs = new_obs
if done:
# Episode done.
print('**********END OF EPISODE**********')
epoch_episode_rewards.append(episode_reward)
episode_rewards_history.append(episode_reward)
epoch_episode_steps.append(episode_step)
episode_reward = 0.
episode_step = 0
epoch_episodes += 1
episodes += 1
agent.reset()
obs = env.reset()
# Train.
epoch_actor_losses = []
epoch_critic_losses = []
epoch_adaptive_distances = []
for t_train in range(nb_train_steps):
#print('t_train:',t_train)
# Adapt param noise, if necessary.
if memory.nb_entries >= batch_size and t_train % param_noise_adaption_interval == 0:
distance = agent.adapt_param_noise()
epoch_adaptive_distances.append(distance)
cl, al = agent.train()
epoch_critic_losses.append(cl)
epoch_actor_losses.append(al)
agent.update_target_net()
# Evaluate.
eval_episode_rewards = []
eval_qs = []
eval_env = None
if eval_env is not None:
eval_episode_reward = 0.
for t_rollout in range(nb_eval_steps):
eval_action, eval_q = agent.pi(eval_obs,
apply_noise=False,
compute_Q=True)
eval_obs, eval_r, eval_done, eval_info = eval_env.step(
max_action * eval_action
) # scale for execution in env (as far as DDPG is concerned, every action is in [-1, 1])
if render_eval:
eval_env.render()
eval_episode_reward += eval_r
eval_qs.append(eval_q)
if eval_done:
eval_obs = eval_env.reset()
eval_episode_rewards.append(eval_episode_reward)
eval_episode_rewards_history.append(
eval_episode_reward)
eval_episode_reward = 0.
mpi_size = MPI.COMM_WORLD.Get_size()
# Log stats.
# XXX shouldn't call np.mean on variable length lists
duration = time.time() - start_time
stats = agent.get_stats()
combined_stats = stats.copy()
combined_stats['epoch'] = epoch
combined_stats['rollout/return'] = np.mean(epoch_episode_rewards)
combined_stats['rollout/return_history'] = np.mean(
episode_rewards_history)
combined_stats['rollout/episode_steps'] = np.mean(
epoch_episode_steps)
combined_stats['rollout/actions_mean'] = np.mean(epoch_actions)
combined_stats['rollout/Q_mean'] = np.mean(epoch_qs)
combined_stats['train/loss_actor'] = np.mean(epoch_actor_losses)
combined_stats['train/loss_critic'] = np.mean(epoch_critic_losses)
combined_stats['train/param_noise_distance'] = np.mean(
epoch_adaptive_distances)
combined_stats['total/duration'] = duration
combined_stats['total/steps_per_second'] = float(t) / float(
duration)
combined_stats['total/episodes'] = episodes
combined_stats['rollout/episodes'] = epoch_episodes
combined_stats['rollout/actions_std'] = np.std(epoch_actions)
# Evaluation statistics.
if eval_env is not None:
combined_stats['eval/return'] = eval_episode_rewards
combined_stats['eval/return_history'] = np.mean(
eval_episode_rewards_history)
combined_stats['eval/Q'] = eval_qs
combined_stats['eval/episodes'] = len(eval_episode_rewards)
def as_scalar(x):
if isinstance(x, np.ndarray):
assert x.size == 1
return x[0]
elif np.isscalar(x):
return x
else:
raise ValueError('expected scalar, got %s' % x)
combined_stats_sums = MPI.COMM_WORLD.allreduce(
np.array([as_scalar(x) for x in combined_stats.values()]))
combined_stats = {
k: v / mpi_size
for (k, v) in zip(combined_stats.keys(), combined_stats_sums)
}
# Total statistics.
combined_stats['total/epochs'] = epoch + 1
combined_stats['total/steps'] = t
save_path = saver.save(sess,
"./model/epoch_" + str(epoch) + ".ckpt")
print(save_path)
for key in sorted(combined_stats.keys()):
logger.record_tabular(key, combined_stats[key])
logger.dump_tabular()
logger.info('')
logdir = logger.get_dir()
if rank == 0 and logdir:
if hasattr(env, 'get_state'):
with open(os.path.join(logdir, 'env_state.pkl'),
'wb') as f:
pickle.dump(env.get_state(), f)
if eval_env and hasattr(eval_env, 'get_state'):
with open(os.path.join(logdir, 'eval_env_state.pkl'),
'wb') as f:
pickle.dump(eval_env.get_state(), f)
def train(env,
nb_epochs,
nb_epoch_cycles,
render_eval,
reward_scale,
render,
param_noise,
actor,
critic,
normalize_returns,
normalize_observations,
critic_l2_reg,
actor_lr,
critic_lr,
action_noise,
popart,
gamma,
clip_norm,
nb_train_steps,
nb_rollout_steps,
nb_eval_steps,
batch_size,
memory,
tau=0.01,
eval_env=None,
controller=None,
param_noise_adaption_interval=50,
restore=True):
rank = MPI.COMM_WORLD.Get_rank()
#assert (np.abs(env.action_space.low) == env.action_space.high).all() # we assume symmetric actions.
assert (np.abs(env.action_space.low) == env.action_space.high
).all() # we assume symmetric actions.
#max_action = env.action_space.high
max_action = env.action_space.high
logger.info(
'scaling actions by {} before executing in env'.format(max_action))
# agent = DDPG(actor, critic, memory, env.observation_space.shape, env.action_space.shape,
# gamma=gamma, tau=tau, normalize_returns=normalize_returns, normalize_observations=normalize_observations,
# batch_size=batch_size, action_noise=action_noise, param_noise=param_noise, critic_l2_reg=critic_l2_reg,
# actor_lr=actor_lr, critic_lr=critic_lr, enable_popart=popart, clip_norm=clip_norm,
# reward_scale=reward_scalei)
agent = DDPG(actor,
critic,
memory,
env.observation_space.shape,
env.action_space.shape,
gamma=gamma,
tau=tau,
normalize_returns=normalize_returns,
normalize_observations=normalize_observations,
batch_size=batch_size,
action_noise=action_noise,
param_noise=param_noise,
critic_l2_reg=critic_l2_reg,
actor_lr=actor_lr,
critic_lr=critic_lr,
enable_popart=popart,
clip_norm=clip_norm,
reward_scale=reward_scale,
action_range=(0., 1.))
logger.info('Using agent with the following configuration:')
logger.info(str(agent.__dict__.items()))
# Set up logging stuff only for a single worker.
if rank == 0:
saver = tf.train.Saver(max_to_keep=600)
else:
saver = None
step = 0
episode = 0
eval_episode_rewards_history = deque(maxlen=100)
episode_rewards_history = deque(maxlen=100)
with U.single_threaded_session() as sess:
# Prepare everything.
if restore == True:
logger.info("Restoring from saved model")
saver = tf.train.import_meta_graph(savingModelPath +
"ddpg_test_model.meta")
saver.restore(sess, tf.train.latest_checkpoint(savingModelPath))
else:
logger.info("Strarting from scratch!")
sess.run(tf.global_variables_initializer())
agent.initialize(sess)
sess.graph.finalize()
agent.reset()
obs = env.reset()
if eval_env is not None:
eval_obs = eval_env.reset()
done = False
episode_reward = 0.
#episode_pose = 0.
episode_step = 0
episodes = 0
t = 0
epoch = 0
start_time = time.time()
epoch_episode_rewards = []
#epoch_episode_poses = []
epoch_episode_steps = []
epoch_episode_eval_rewards = []
epoch_episode_eval_steps = []
epoch_start_time = time.time()
epoch_actions = []
epoch_act = []
epoch_qs = []
epoch_episodes = 0
for epoch in range(nb_epochs):
for cycle in range(nb_epoch_cycles):
# Perform rollouts.
for t_rollout in range(nb_rollout_steps):
# Predict next action.
action, q = agent.pi(obs, apply_noise=True, compute_Q=True)
#assert action.shape == env.action_space.shape
assert action.shape == env.action_space.shape
# Execute next action.
if rank == 0 and render:
env.render()
assert max_action.shape == action.shape
controller.assign_param(max_action * action)
act = controller.control(obs)
#act = np.clip(act, env.action_space.low, env.action_space.high)
new_obs, r, done, info = env.step(
act
) # scale for execution in env (as far as DDPG is concerned, every action is in [-1, 1])
t += 1
#r += -.1*(act**2)
#pose = to_angle_square(new_obs)
if rank == 0 and render:
env.render()
episode_reward += r
#episode_pose += pose
episode_step += 1
# Book-keeping.
epoch_actions.append(action)
epoch_act.append(act)
epoch_qs.append(q)
agent.store_transition(obs, action, r, new_obs, done)
obs = new_obs
if done:
# Episode done.
epoch_episode_rewards.append(episode_reward)
#epoch_episode_poses.append(episode_pose)
episode_rewards_history.append(episode_reward)
epoch_episode_steps.append(episode_step)
episode_reward = 0.
#episode_pose = 0.
episode_step = 0
epoch_episodes += 1
episodes += 1
agent.reset()
obs = env.reset()
# Train.
epoch_actor_losses = []
epoch_critic_losses = []
epoch_adaptive_distances = []
for t_train in range(nb_train_steps):
# Adapt param noise, if necessary.
if memory.nb_entries >= batch_size and t_train % param_noise_adaption_interval == 0:
distance = agent.adapt_param_noise()
epoch_adaptive_distances.append(distance)
cl, al = agent.train()
epoch_critic_losses.append(cl)
epoch_actor_losses.append(al)
agent.update_target_net()
# Evaluate.
eval_episode_rewards = []
#eval_episode_poses = []
eval_qs = []
if eval_env is not None:
eval_episode_reward = 0.
eval_episode_pose = 0.
for t_rollout in range(nb_eval_steps):
eval_action, eval_q = agent.pi(eval_obs,
apply_noise=False,
compute_Q=True)
controller.assign_param(max_action * eval_action)
eval_act = controller.control(eval_obs)
#eval_act = np.clip(eval_act, eval_env.action_space.low, eval_env.action_space.high)
eval_obs, eval_r, eval_done, eval_info = eval_env.step(
eval_act
) # scale for execution in env (as far as DDPG is concerned, every action is in [-1, 1])
#eval_r += -.1*(eval_act**2)
#eval_p = to_angle_square(eval_obs)
if render_eval:
eval_env.render()
eval_episode_reward += eval_r
#eval_episode_pose += eval_p
eval_qs.append(eval_q)
if eval_done:
eval_obs = eval_env.reset()
eval_episode_rewards.append(eval_episode_reward)
#eval_episode_poses.append(eval_episode_pose)
eval_episode_rewards_history.append(
eval_episode_reward)
eval_episode_reward = 0.
#eval_episode_pose = 0.
if saver is not None:
logger.info("saving the trained model")
start_time_save = time.time()
saver.save(
sess, savingModelPath + str(
(epoch + 1) * (cycle + 1)) + '/' +
"ddpg_test_model")
logger.info('runtime saving: {}s'.format(time.time() -
start_time_save))
mpi_size = MPI.COMM_WORLD.Get_size()
# Log stats.
# XXX shouldn't call np.mean on variable length lists
duration = time.time() - start_time
stats = agent.get_stats()
combined_stats = stats.copy()
combined_stats['rollout/return'] = np.mean(epoch_episode_rewards)
#combined_stats['rollout/return_pose'] = np.mean(epoch_episode_poses)
combined_stats['rollout/return_history'] = np.mean(
episode_rewards_history)
combined_stats['rollout/episode_steps'] = np.mean(
epoch_episode_steps)
total = 0
for params in epoch_actions:
total += params
total = max_action * total
KTH_means = total[0] / len(epoch_actions)
KE_means = total[1] / len(epoch_actions)
#Kd_means = total[2]/len(epoch_actions)
combined_stats['rollout/KTH_mean'] = KTH_means
combined_stats['rollout/KE_mean'] = KE_means
#combined_stats['rollout/Target_speed_mean'] = Kd_means
combined_stats['rollout/Q_mean'] = np.mean(epoch_qs)
combined_stats['train/loss_actor'] = np.mean(epoch_actor_losses)
combined_stats['train/loss_critic'] = np.mean(epoch_critic_losses)
combined_stats['train/param_noise_distance'] = np.mean(
epoch_adaptive_distances)
combined_stats['total/duration'] = duration
combined_stats['total/steps_per_second'] = float(t) / float(
duration)
combined_stats['total/episodes'] = episodes
combined_stats['rollout/episodes'] = epoch_episodes
combined_stats['rollout/actions_std'] = np.std(epoch_actions)
combined_stats['rollout/act_mean'] = np.mean(epoch_act)
combined_stats['rollout/act_std'] = np.std(epoch_act)
# Evaluation statistics.
if eval_env is not None:
combined_stats['eval/return'] = np.mean(eval_episode_rewards)
#combined_stats['eval/return_pose'] = np.mean(eval_episode_poses)
combined_stats['eval/return_history'] = np.mean(
eval_episode_rewards_history)
combined_stats['eval/Q_mean'] = np.mean(eval_qs)
combined_stats['eval/episodes'] = len(eval_episode_rewards)
def as_scalar(x):
if isinstance(x, np.ndarray):
assert x.size == 1
return x[0]
elif np.isscalar(x):
return x
#else:
# raise ValueError('expected scalar, got %s'%x)
combined_stats_sums = MPI.COMM_WORLD.allreduce(
np.array([as_scalar(x) for x in combined_stats.values()]))
combined_stats = {
k: v / mpi_size
for (k, v) in zip(combined_stats.keys(), combined_stats_sums)
}
# Total statistics.
combined_stats['total/epochs'] = epoch + 1
combined_stats['total/steps'] = t
for key in sorted(combined_stats.keys()):
logger.record_tabular(key, combined_stats[key])
logger.dump_tabular()
logger.info('')
logdir = logger.get_dir()
if rank == 0 and logdir:
if hasattr(env, 'get_state'):
with open(os.path.join(logdir, 'env_state.pkl'),
'wb') as f:
pickle.dump(env.get_state(), f)
if eval_env and hasattr(eval_env, 'get_state'):
with open(os.path.join(logdir, 'eval_env_state.pkl'),
'wb') as f:
pickle.dump(eval_env.get_state(), f)