def test_step():
with mock.patch('subprocess.Popen'):
with mock.patch('socket.socket') as mock_socket:
with mock.patch('glob.glob') as mock_glob:
mock_glob.return_value = ['FakeLaunchPath']
mock_socket.return_value.accept.return_value = (mock_socket, 0)
mock_socket.recv.return_value.decode.return_value = dummy_start
env = UnityEnvironment(' ')
brain = env.brains['RealFakeBrain']
mock_socket.recv.side_effect = dummy_reset
brain_info = env.reset()
mock_socket.recv.side_effect = dummy_step
brain_info = env.step([0] * brain.vector_action_space_size * len(brain_info['RealFakeBrain'].agents))
with pytest.raises(UnityActionException):
env.step([0])
brain_info = env.step([0] * brain.vector_action_space_size * len(brain_info['RealFakeBrain'].agents))
with pytest.raises(UnityActionException):
env.step([0] * brain.vector_action_space_size * len(brain_info['RealFakeBrain'].agents))
env.close()
assert env.global_done
assert isinstance(brain_info, dict)
assert isinstance(brain_info['RealFakeBrain'], BrainInfo)
assert isinstance(brain_info['RealFakeBrain'].visual_observations, list)
assert isinstance(brain_info['RealFakeBrain'].vector_observations, np.ndarray)
assert len(brain_info['RealFakeBrain'].visual_observations) == brain.number_visual_observations
assert brain_info['RealFakeBrain'].vector_observations.shape[0] == \
len(brain_info['RealFakeBrain'].agents)
assert brain_info['RealFakeBrain'].vector_observations.shape[1] == \
brain.vector_observation_space_size * brain.num_stacked_vector_observations
assert not brain_info['RealFakeBrain'].local_done[0]
assert brain_info['RealFakeBrain'].local_done[2]
def test_ppo_model_cc_visual_curio(mock_communicator, mock_launcher):
tf.reset_default_graph()
with tf.Session() as sess:
with tf.variable_scope("FakeGraphScope"):
mock_communicator.return_value = MockCommunicator(
discrete_action=False, visual_inputs=2)
env = UnityEnvironment(' ')
model = PPOModel(env.brains["RealFakeBrain"], use_curiosity=True)
init = tf.global_variables_initializer()
sess.run(init)
run_list = [model.output, model.all_probs, model.value, model.entropy,
model.learning_rate, model.intrinsic_reward]
feed_dict = {model.batch_size: 2,
model.sequence_length: 1,
model.vector_in: np.array([[1, 2, 3, 1, 2, 3],
[3, 4, 5, 3, 4, 5]]),
model.next_vector_in: np.array([[1, 2, 3, 1, 2, 3],
[3, 4, 5, 3, 4, 5]]),
model.output: [[0.0, 0.0], [0.0, 0.0]],
model.visual_in[0]: np.ones([2, 40, 30, 3]),
model.visual_in[1]: np.ones([2, 40, 30, 3]),
model.next_visual_in[0]: np.ones([2, 40, 30, 3]),
model.next_visual_in[1]: np.ones([2, 40, 30, 3])
}
sess.run(run_list, feed_dict=feed_dict)
env.close()
def test_initialization():
with mock.patch('subprocess.Popen'):
with mock.patch('socket.socket') as mock_socket:
with mock.patch('glob.glob') as mock_glob:
mock_glob.return_value = ['FakeLaunchPath']
mock_socket.return_value.accept.return_value = (mock_socket, 0)
mock_socket.recv.return_value.decode.return_value = dummy_start
env = UnityEnvironment(' ')
with pytest.raises(UnityActionException):
env.step([0])
assert env.brain_names[0] == 'RealFakeBrain'
env.close()
def test_close():
with mock.patch('subprocess.Popen'):
with mock.patch('socket.socket') as mock_socket:
with mock.patch('glob.glob') as mock_glob:
mock_glob.return_value = ['FakeLaunchPath']
mock_socket.return_value.accept.return_value = (mock_socket, 0)
mock_socket.recv.return_value.decode.return_value = dummy_start
env = UnityEnvironment(' ')
assert env._loaded
env.close()
assert not env._loaded
mock_socket.close.assert_called_once()
def test_ppo_model_discrete():
d_action_c_state_start = '''{
"AcademyName": "RealFakeAcademy",
"resetParameters": {},
"brainNames": ["RealFakeBrain"],
"externalBrainNames": ["RealFakeBrain"],
"logPath":"RealFakePath",
"apiNumber":"API-3",
"brainParameters": [{
"vectorObservationSize": 3,
"numStackedVectorObservations": 2,
"vectorActionSize": 2,
"memorySize": 0,
"cameraResolutions": [{"width":30,"height":40,"blackAndWhite":false}],
"vectorActionDescriptions": ["",""],
"vectorActionSpaceType": 0,
"vectorObservationSpaceType": 1
}]
}'''.encode()
tf.reset_default_graph()
with mock.patch('subprocess.Popen'):
with mock.patch('socket.socket') as mock_socket:
with mock.patch('glob.glob') as mock_glob:
# End of mock
with tf.Session() as sess:
with tf.variable_scope("FakeGraphScope"):
mock_glob.return_value = ['FakeLaunchPath']
mock_socket.return_value.accept.return_value = (mock_socket, 0)
mock_socket.recv.return_value.decode.return_value = d_action_c_state_start
env = UnityEnvironment(' ')
model = PPOModel(env.brains["RealFakeBrain"])
init = tf.global_variables_initializer()
sess.run(init)
run_list = [model.output, model.all_probs, model.value, model.entropy,
model.learning_rate]
feed_dict = {model.batch_size: 2,
model.sequence_length: 1,
model.vector_in: np.array([[1, 2, 3, 1, 2, 3],
[3, 4, 5, 3, 4, 5]]),
model.visual_in[0]: np.ones([2, 40, 30, 3])
}
sess.run(run_list, feed_dict=feed_dict)
env.close()
def test_cc_bc_model(mock_communicator, mock_launcher):
tf.reset_default_graph()
with tf.Session() as sess:
with tf.variable_scope("FakeGraphScope"):
mock_communicator.return_value = MockCommunicator(
discrete_action=False, visual_inputs=0)
env = UnityEnvironment(' ')
model = BehavioralCloningModel(env.brains["RealFakeBrain"])
init = tf.global_variables_initializer()
sess.run(init)
run_list = [model.sample_action, model.policy]
feed_dict = {model.batch_size: 2,
model.sequence_length: 1,
model.vector_in: np.array([[1, 2, 3, 1, 2, 3],
[3, 4, 5, 3, 4, 5]])}
sess.run(run_list, feed_dict=feed_dict)
env.close()
def test_cc_bc_model():
c_action_c_state_start = '''{
"AcademyName": "RealFakeAcademy",
"resetParameters": {},
"brainNames": ["RealFakeBrain"],
"externalBrainNames": ["RealFakeBrain"],
"logPath":"RealFakePath",
"apiNumber":"API-3",
"brainParameters": [{
"vectorObservationSize": 3,
"numStackedVectorObservations": 2,
"vectorActionSize": 2,
"memorySize": 0,
"cameraResolutions": [],
"vectorActionDescriptions": ["",""],
"vectorActionSpaceType": 1,
"vectorObservationSpaceType": 1
}]
}'''.encode()
tf.reset_default_graph()
with mock.patch('subprocess.Popen'):
with mock.patch('socket.socket') as mock_socket:
with mock.patch('glob.glob') as mock_glob:
# End of mock
with tf.Session() as sess:
with tf.variable_scope("FakeGraphScope"):
mock_glob.return_value = ['FakeLaunchPath']
mock_socket.return_value.accept.return_value = (mock_socket, 0)
mock_socket.recv.return_value.decode.return_value = c_action_c_state_start
env = UnityEnvironment(' ')
model = BehavioralCloningModel(env.brains["RealFakeBrain"])
init = tf.global_variables_initializer()
sess.run(init)
run_list = [model.sample_action, model.policy]
feed_dict = {model.batch_size: 2,
model.sequence_length: 1,
model.vector_in: np.array([[1, 2, 3, 1, 2, 3],
[3, 4, 5, 3, 4, 5]])}
sess.run(run_list, feed_dict=feed_dict)
env.close()
def test_ppo_model_dc_vector(mock_communicator, mock_launcher):
tf.reset_default_graph()
with tf.Session() as sess:
with tf.variable_scope("FakeGraphScope"):
mock_communicator.return_value = MockCommunicator(
discrete_action=True, visual_inputs=0)
env = UnityEnvironment(' ')
model = PPOModel(env.brains["RealFakeBrain"])
init = tf.global_variables_initializer()
sess.run(init)
run_list = [model.output, model.all_probs, model.value, model.entropy,
model.learning_rate]
feed_dict = {model.batch_size: 2,
model.sequence_length: 1,
model.vector_in: np.array([[1, 2, 3, 1, 2, 3],
[3, 4, 5, 3, 4, 5]])}
sess.run(run_list, feed_dict=feed_dict)
env.close()
class UnityEnv(gym.Env):
"""
Provides Gym wrapper for Unity Learning Environments.
Multi-agent environments use lists for object types, as done here:
https://github.com/openai/multiagent-particle-envs
"""
def __init__(self, params):
environment_filename = params['path']
worker_id = params['worker_id']
seed = params['seed']
use_visual = params['visual_mode']
multiagent = params['multiagent_mode']
self._env = UnityEnvironment(environment_filename, seed=seed)
self.name = self._env.academy_name
self.visual_obs = None
self._action_space_size = None
self._current_state = None
self._n_agents = None
self._multiagent = multiagent
# Check brain configuration
if len(self._env.brains) != 1:
raise UnityGymException(
"There can only be one brain in a UnityEnvironment "
"if it is wrapped in a gym.")
self.brain_name = self._env.external_brain_names[0]
brain = self._env.brains[self.brain_name]
if use_visual and brain.number_visual_observations == 0:
raise UnityGymException(
"`use_visual` was set to True, however there are no"
" visual observations as part of this environment.")
self.use_visual = brain.number_visual_observations >= 1 and use_visual
if brain.number_visual_observations > 1:
logger.warning(
"The environment contains more than one visual observation. "
"Please note that only the first will be provided in the observation."
)
if brain.num_stacked_vector_observations != 1:
raise UnityGymException(
"There can only be one stacked vector observation in a UnityEnvironment "
"if it is wrapped in a gym.")
# Check for number of agents in scene.
initial_info = self._env.reset()[self.brain_name]
self._check_agents(len(initial_info.agents))
# Set observation and action spaces
if brain.vector_action_space_type == "discrete":
if len(brain.vector_action_space_size) == 1:
self._action_space = spaces.Discrete(
brain.vector_action_space_size[0])
else:
self._action_space = spaces.MultiDiscrete(
brain.vector_action_space_size)
else:
self._action_space_size = brain.vector_action_space_size
high = np.array([1] * brain.vector_action_space_size)
self._action_space = spaces.Box(-high, high, dtype=np.float32)
high = np.array([np.inf] * brain.vector_observation_space_size)
self.action_meanings = brain.vector_action_descriptions
if self.use_visual:
if brain.camera_resolutions[0]["blackAndWhite"]:
depth = 1
else:
depth = 3
self._observation_space = spaces.Box(
0,
1,
dtype=np.float32,
shape=(brain.camera_resolutions[0]["height"],
brain.camera_resolutions[0]["width"], depth))
else:
self._observation_space = spaces.Box(-high, high, dtype=np.float32)
def reset(self, train_mode=True):
"""Resets the state of the environment and returns an initial observation.
In the case of multi-agent environments, this is a list.
Returns: observation (object/list): the initial observation of the
space.
"""
info = self._env.reset(train_mode)[self.brain_name]
n_agents = len(info.agents)
self._check_agents(n_agents)
if not self._multiagent:
obs, reward, done, info = self._single_step(info)
else:
obs, reward, done, info = self._multi_step(info)
return obs
def step(self, action):
"""Run one timestep of the environment's dynamics. When end of
episode is reached, you are responsible for calling `reset()`
to reset this environment's state.
Accepts an action and returns a tuple (observation, reward, done, info).
In the case of multi-agent environments, these are lists.
Args:
action (object/list): an action provided by the environment
Returns:
observation (object/list): agent's observation of the current environment
reward (float/list) : amount of reward returned after previous action
done (boolean/list): whether the episode has ended.
info (dict): contains auxiliary diagnostic information, including BrainInfo.
"""
# Use random actions for all other agents in environment.
if self._multiagent:
if not isinstance(action, list):
raise UnityGymException(
"The environment was expecting `action` to be a list.")
if len(action) != self._n_agents:
raise UnityGymException(
"The environment was expecting a list of {} actions.".
format(self._n_agents))
else:
action = np.array(action)
info = self._env.step(action)[self.brain_name]
n_agents = len(info.agents)
self._check_agents(n_agents)
self._current_state = info
if not self._multiagent:
obs, reward, done, info = self._single_step(info)
else:
obs, reward, done, info = self._multi_step(info)
return obs, reward, done, info
def _single_step(self, info):
if self.use_visual:
self.visual_obs = info.visual_observations[0][0, :, :, :]
default_observation = self.visual_obs
else:
default_observation = info.vector_observations[0, :]
return default_observation, info.rewards[0], info.local_done[0], {
"text_observation": info.text_observations[0],
"brain_info": info
}
def _multi_step(self, info):
if self.use_visual:
self.visual_obs = info.visual_observations
default_observation = self.visual_obs
else:
default_observation = info.vector_observations
return list(default_observation), info.rewards, info.local_done, {
"text_observation": info.text_observations,
"brain_info": info
}
def render(self, mode='rgb_array'):
return self.visual_obs
def close(self):
"""Override _close in your subclass to perform any necessary cleanup.
Environments will automatically close() themselves when
garbage collected or when the program exits.
"""
self._env.close()
def get_action_meanings(self):
return self.action_meanings
def seed(self, seed=None):
"""Sets the seed for this env's random number generator(s).
Currently not implemented.
"""
logger.warning("Could not seed environment %s", self.name)
return
def _check_agents(self, n_agents):
if not self._multiagent and n_agents > 1:
raise UnityGymException(
"The environment was launched as a single-agent environment, however"
"there is more than one agent in the scene.")
elif self._multiagent and n_agents <= 1:
raise UnityGymException(
"The environment was launched as a mutli-agent environment, however"
"there is only one agent in the scene.")
if self._n_agents is None:
self._n_agents = n_agents
logger.info("{} agents within environment.".format(n_agents))
elif self._n_agents != n_agents:
raise UnityGymException(
"The number of agents in the environment has changed since "
"initialization. This is not supported.")
@property
def metadata(self):
return {'render.modes': ['rgb_array']}
@property
def reward_range(self):
return -float('inf'), float('inf')
@property
def spec(self):
return None
@property
def action_space_size(self):
return self._action_space_size
@property
def action_space(self):
return self._action_space
@property
def observation_space(self):
return self._observation_space
@property
def number_agents(self):
return self._n_agents
info = env.reset(train_mode=train_model, progress=get_progress())[brain_name]
trainer.reset_buffers(info, total=True)
# Decide and take an action
new_info = trainer.take_action(info, env, brain_name, steps, normalize)
info = new_info
trainer.process_experiences(info, time_horizon, gamma, lambd)
if len(trainer.training_buffer['actions']) > buffer_size and train_model:
# Perform gradient descent with experience buffer
trainer.update_model(batch_size, num_epoch)
if steps % summary_freq == 0 and steps != 0 and train_model:
# Write training statistics to tensorboard.
trainer.write_summary(summary_writer, steps, env._curriculum.lesson_number)
if steps % save_freq == 0 and steps != 0 and train_model:
# Save Tensorflow model
save_model(sess, model_path=model_path, steps=steps, saver=saver)
if train_model:
steps += 1
sess.run(ppo_model.increment_step)
if len(trainer.stats['cumulative_reward']) > 0:
mean_reward = np.mean(trainer.stats['cumulative_reward'])
sess.run(ppo_model.update_reward, feed_dict={ppo_model.new_reward: mean_reward})
last_reward = sess.run(ppo_model.last_reward)
# Final save Tensorflow model
if steps != 0 and train_model:
save_model(sess, model_path=model_path, steps=steps, saver=saver)
env.close()
graph_name = (env_name.strip()
.replace('.app', '').replace('.exe', '').replace('.x86_64', '').replace('.x86', ''))
graph_name = os.path.basename(os.path.normpath(graph_name))
export_graph(model_path, graph_name)
def experiment(hidden_size=64,
lr=3e-4,
num_steps=2048,
mini_batch_size=32,
ppo_epochs=10,
threshold_reward=10,
max_episodes=15,
nrmlz_adv=True,
clip_gradients=True):
use_cuda = torch.cuda.is_available()
# device = torch.device("cuda" if use_cuda else "cpu")
device = torch.device("cpu")
print(device)
scores_window = deque(maxlen=100)
test_rewards = []
# env = UnityEnvironment(file_name='p2_continuous-control/reacher20/reacher', base_port=64739)
env = UnityEnvironment(file_name='reacher20/reacher', base_port=64739)
# get the default brain
brain_name = env.brain_names[0]
brain = env.brains[brain_name]
# reset the environment
env_info = env.reset(train_mode=True)[brain_name]
action_size = brain.vector_action_space_size
num_agents = len(env_info.agents)
states = env_info.vector_observations
state_size = states.shape[1]
num_inputs = state_size
num_outputs = action_size
model = ActorCriticPolicy(num_inputs, num_outputs, hidden_size).to(device)
optimizer = optim.Adam(model.parameters(), lr=lr, eps=1e-5)
# while episode < max_episodes and not early_stop:
for episode in tqdm(range(max_episodes)):
log_probs = []
values = []
states_list = []
actions_list = []
rewards = []
masks = []
env_info = env.reset(train_mode=True)[brain_name]
state = env_info.vector_observations
for duration in range(num_steps):
state = torch.FloatTensor(state).to(device)
dist, value = model(state)
action_t = dist.sample()
action_np = action_t.cpu().data.numpy()
env_info = env.step(action_np)[
brain_name] # send all actions to the environment
next_state = env_info.vector_observations # get next state (for each agent)
reward = env_info.rewards # get reward (for each agent)
dones = np.array(env_info.local_done) # see if episode finished
if reward == None:
pass
log_prob = dist.log_prob(action_t)
log_prob = torch.sum(log_prob, dim=1, keepdim=True)
log_probs.append(log_prob)
values.append(value)
reward_t = torch.FloatTensor(reward).unsqueeze(1).to(device)
masks_t = torch.FloatTensor(1 - dones)
rewards.append(reward_t)
masks.append(masks_t)
states_list.append(state)
actions_list.append(action_t)
state = next_state
if np.any(dones):
break
next_state = torch.FloatTensor(state).to(device)
_, next_value = model(next_state)
# returns = compute_gae(next_value, rewards, masks, values)
mean1 = torch.mean(torch.stack(rewards))
print("Rewards: ", mean1)
returns = compute_gaes(next_value, rewards, masks, values)
# return2 = compute_gae_rollout(rollout)
returns = torch.cat(returns).detach()
mean2 = torch.mean(returns)
#print("Returns: ", mean2)
log_probs = torch.cat(log_probs).detach()
values = torch.cat(values).detach()
states = torch.cat(states_list)
actions = torch.cat(actions_list)
advantages = returns - values
if nrmlz_adv:
advantages = (advantages - advantages.mean()) / (advantages.std() +
1e-8)
losses = []
clip_param = 0.2
print("return: ", returns.mean(), "advantage:", advantages.mean())
for _ in range(ppo_epochs):
for state, action, old_log_probs, return_, advantage in ppo_iter(
mini_batch_size, states, actions, log_probs, returns,
advantages):
# print("return: ", return_.mean(), "advantage:", advantage.mean())
dist, value = model(state)
entropy = dist.entropy().mean()
new_log_probs = dist.log_prob(action)
new_log_probs = torch.sum(new_log_probs, dim=1, keepdim=True)
ratio = (new_log_probs - old_log_probs).exp()
# surrogate objective
surr1 = ratio * advantage
# Clipped Surrogate Objectiv
surr2 = ratio.clamp(1.0 - clip_param,
1.0 + clip_param) * advantage
policy_loss = -torch.min(surr1, surr2).mean() - 0.01 * entropy
value_loss = (return_ - value).pow(2).mean()
loss = 0.5 * value_loss + policy_loss
losses.append(loss)
optimizer.zero_grad()
loss.backward()
if clip_gradients:
nn.utils.clip_grad_norm_(model.parameters(), 5)
optimizer.step()
test_mean_reward = test_agent(env, brain_name, model, device)
test_rewards.append(test_mean_reward)
scores_window.append(test_mean_reward)
# mean_score = np.mean(scores_window)
# print("Mean Score: ", mean_score, "Frame: ", episode)
print('Episode {}, Total score this episode: {}, Last {} average: {}'.
format(episode, test_mean_reward, min(episode, 100),
np.mean(scores_window)))
if np.mean(scores_window) > threshold_reward:
torch.save(
model.state_dict(),
f"ppo_checkpoint_{test_mean_reward}_e{episode}_hs{hidden_size}_lr{lr}_st{num_steps}_b{mini_batch_size}_ppo{ppo_epochs}_r{threshold_reward}_e{episode}_adv{nrmlz_adv}_{test_mean_reward}.pth"
)
print(
'\nEnvironment solved in {:d} episodes!\tAverage Score: {:.2f}'
.format(episode, test_mean_reward))
break
episode += 1
# %%
#torch.save(model.state_dict(),
# f"ppo_checkpoint_{test_mean_reward}_e{episode}_hs{hidden_size}_lr{lr}_st{num_steps}_b{mini_batch_size}_ppo{ppo_epochs}_r{threshold_reward}_e{episode}_adv{nrmlz_adv}.pth")
env.close()
return scores_window, test_rewards
def train(
env_location,
curve_path,
n_episodes=1000,
batch_size=512,
buffer_size=int(1e6),
):
env = UnityEnvironment(file_name=env_location)
# get the default brain
brain_name = env.brain_names[0]
brain = env.brains[brain_name]
# reset the environment
env_info = env.reset(train_mode=True)[brain_name]
# number of agents
num_agents = len(env_info.agents)
logger.info(f'Number of agents: {num_agents}')
# size of each action
action_size = brain.vector_action_space_size
logger.info(f'Size of each action: {action_size}')
# examine the state space
states = env_info.vector_observations
state_size = states.shape[1]
logger.info(
'There are {} agents. Each observes a state with length: {}'.format(
states.shape[0], state_size))
logger.info(f'The state for the first agent looks like: {states[0]}')
# reset the environment
# Replay memory
random_seed = 2
memory0 = ReplayBuffer(action_size, buffer_size, batch_size, random_seed)
memory1 = memory0
def create_agent(memory):
return Agent(state_size=states.shape[1],
action_size=brain.vector_action_space_size,
random_seed=random_seed,
memory=memory,
batch_size=batch_size)
agent0 = create_agent(memory0)
agent1 = create_agent(memory1)
def ddpg(n_episodes, average_window=100, plot_every=4):
scores_deque = deque(maxlen=average_window)
scores_all = []
average_scores_all = []
for i_episode in range(1, n_episodes + 1):
env_info = env.reset(train_mode=True)[brain_name]
states = np.array(
env_info.vector_observations,
copy=True) # get the current state (for each agent)
agent0.reset()
agent1.reset()
scores = np.zeros(
num_agents) # initialize the score (for each agent)
while True:
action0 = agent0.act(states[0])
action1 = agent1.act(states[1])
actions = np.concatenate((action0, action1))
env_info = env.step(actions)[
brain_name] # send all actions to tne environment
next_states = env_info.vector_observations # get next state (for each agent)
rewards = env_info.rewards # get reward (for each agent)
dones = env_info.local_done # see if episode finished
memory0.add(states[0], action0, rewards[0], next_states[0],
dones[0])
memory1.add(states[1], action1, rewards[1], next_states[1],
dones[1])
agent0.step()
agent1.step()
scores += env_info.rewards # update the score (for each agent)
states = next_states # roll over states to next time step
any_done = np.any(dones)
assert any_done == np.all(dones)
if any_done: # exit loop if episode finished
break
score_episode = np.max(scores)
best_agent = np.argmax(scores)
scores_deque.append(score_episode)
scores_all.append(score_episode)
average_score_queue = np.mean(scores_deque)
average_scores_all.append(average_score_queue)
logger.info(
'\rEpisode {}\tScore: {:.4f}\tBest Agent: {}\tAverage Score: {:.4f}'
.format(i_episode, score_episode, best_agent,
average_score_queue))
torch.save(agent0.actor_local.state_dict(),
'checkpoint_actor0.pth')
torch.save(agent0.critic_local.state_dict(),
'checkpoint_critic0.pth')
torch.save(agent1.actor_local.state_dict(),
'checkpoint_actor1.pth')
torch.save(agent1.critic_local.state_dict(),
'checkpoint_critic1.pth')
if i_episode > average_window and average_score_queue > 1.0:
break
if i_episode % plot_every == 0:
plot_curve(scores_all, average_scores_all)
return scores_all, average_scores_all
scores, average_scores = ddpg(n_episodes=n_episodes)
plot_curve(scores, average_scores)
env.close()
return np.max(average_scores)
class UnityEnvV0(Env, Serializable):
def __init__(self,
app_name,
time_state=False,
idx=0,
is_render=False,
no_graphics=False,
recording=True):
Serializable.quick_init(self, locals())
# Unity scene
self._env = UnityEnvironment(file_name=app_name,
worker_id=idx,
no_graphics=no_graphics)
self.id = 0
self.name = app_name
self.idx = idx
self.is_render = is_render
self.time_state = time_state
self.time_step = 0
# Check brain configuration
assert len(self._env.brains) == 1
self.brain_name = self._env.external_brain_names[0]
brain = self._env.brains[self.brain_name]
# Check for number of agents in scene
initial_info = self._env.reset()[self.brain_name]
self.use_visual = (brain.number_visual_observations == 1) and False
self.recording = brain.number_visual_observations == 1 and recording
# Set observation and action spaces
if brain.vector_action_space_type == "discrete":
self._action_space = Discrete(1)
else:
high = np.array([np.inf] * (brain.vector_action_space_size))
self._action_space = Box(-high, high)
# ----------------------------------
if self.use_visual and False and no_graphic:
high = np.array([np.inf] * brain.camera_resolutions[0]["height"] *
brain.camera_resolutions[0]["width"] * 3)
self._observation_space = Box(-high, high)
else:
if self.time_state:
high = np.array([np.inf] *
(brain.vector_observation_space_size + 1))
else:
high = np.array([np.inf] *
(brain.vector_observation_space_size))
self._observation_space = Box(-high, high)
# video buffer
self.frames = []
def reset(self):
self.frames = []
info = self._env.reset()[self.brain_name]
if self.is_render: self.observation = info.visual_observations[0]
state = info.vector_observations[0][:]
self._pos = info.vector_observations[0][:2]
if self.time_state:
state = np.hstack((state, [self.time_step]))
self.time_step += 1
self._collect_frames(info.visual_observations[0][0])
return state.flatten()
def step(self, action):
info = self._env.step([action])[self.brain_name]
if self.is_render: self.observation = info.visual_observations[0]
state = info.vector_observations[0][:]
self._pos = info.vector_observations[0][:2]
reward = info.rewards[0]
done = info.local_done[0]
if self.time_state:
state = np.hstack((state, [self.time_step]))
self.time_step += 1
if done: self.time_step = 0
self._collect_frames(info.visual_observations[0][0])
return Step(observation=state.flatten(), reward=reward, done=done)
def terminate(self):
self._env.close()
def render(self, mode=None):
if self.is_render:
x = self.observation[0] * 255
return np.array(x).astype('uint8')
else:
return np.zeros((480, 360, 3))
def _collect_frames(self, frame):
if self.recording:
self.frames.append(np.uint8(frame * 255))
@property
def action_space(self):
return self._action_space
@property
def observation_space(self):
return self._observation_space
@property
def position(self):
return self._pos
class UnityEnv(IEnvironment):
def __init__(self, name):
drl_logger.info("Initializing environment.'",
extra={"params": {
"name": name,
}})
self.env = UnityEnvironment(file_name=name)
self.brain_name = self.env.brain_names[0]
self.termination_reward = 0
def action_offset(self):
return 0
def close(self):
self.env.close()
def get_action_space(self):
# isDiscrete = isinstance(self.__env.action_space, Discrete)
#
# if isDiscrete:
# num_action_space = self.__env.action_space.n
# logging.debug("Env action space is discrete")
# logging.debug("Env action space: {}".format(num_action_space))
#
# logging.debug("Env observation space: {}".format(self.__env.observation_space))
pass
def render(self, mode):
pass
def reset(self):
brain_name = self.env.brain_names[0]
# brain = self.__env.brains[brain_name]
env_info = self.env.reset(
train_mode=True)[brain_name] # reset the environment
state = env_info.vector_observations[0] # get the current state
# state = env_info.vector_observations # get the current state
new_life = True
return state, new_life
def start_game_action(self):
return None
def step(self, action):
env_info = self.env.step(action)[
self.brain_name] # send the action to the environment
next_state = env_info.vector_observations[0] # get the next state
reward = env_info.rewards[0] # get the reward
done = env_info.local_done[0] # see if episode has finished
if done:
reward += self.termination_reward
new_life = False
return next_state, reward, done, new_life
def main():
env = UnityEnvironment(file_name='Reacher.app')
brain_name = env.brain_names[0]
brain = env.brains[brain_name]
env_info = env.reset(train_mode=True)[brain_name]
num_agents = len(env_info.agents)
action_size = brain.vector_action_space_size
states = env_info.vector_observations
state_size = states.shape[1]
agent = Agent(state_size=state_size,
action_size=action_size,
random_seed=3)
scores_deque = deque(maxlen=100)
scores = []
for i_episode in range(1, 1000):
begin = time.time()
curr_scores = np.zeros(
num_agents) # initialize the score (for each agent)
env_info = env.reset(
train_mode=True)[brain_name] # reset the environment
states = env_info.vector_observations # get the current state (for each agent)
agent.reset()
for t in range(1000):
actions = agent.act(states)
env_info = env.step(actions)[
brain_name] # send all actions to the environment
next_states = env_info.vector_observations # get next state (for each agent)
rewards = env_info.rewards # get reward (for each agent)
dones = env_info.local_done # see if episode finished
agent.step(states, actions, rewards, next_states, dones, t)
states = next_states
curr_scores += rewards
if np.any(dones):
break
curr_score = np.mean(curr_scores)
scores_deque.append(curr_score)
average_score = np.mean(scores_deque)
scores.append(curr_score)
print(
'\rEpisode {}\tTime: {:.2f}\tAvg: {:.2f}\tScore: {:.2f}\tMin {:.2f}\tMax {:.2f}'
.format(i_episode,
time.time() - begin, average_score, curr_score,
min(curr_scores), max(curr_scores)))
if i_episode % 10 == 0:
torch.save(agent.actor_local.state_dict(), 'checkpoint_actor.pth')
torch.save(agent.critic_local.state_dict(),
'checkpoint_critic.pth')
if average_score >= 30.0:
print(
'\nEnvironment solved in {:d} episodes!\tAverage Score: {:.2f}'
.format(i_episode - 100, average_score))
torch.save(agent.actor_local.state_dict(), 'checkpoint_actor.pth')
torch.save(agent.critic_local.state_dict(),
'checkpoint_critic.pth')
break
env.close()
return
def train_unity_ddpg(PATH, env_name, platform, env_path, policy,
score_threshold, timestamp, start, n_episodes, max_t,
num_agents):
""" Trains unity environments with DDPG policy """
total_scores = []
from unityagents import UnityEnvironment
env_path = PATH + f"data/{env_path}"
env = UnityEnvironment(file_name=env_path)
brain_name = env.brain_names[0]
brain = env.brains[brain_name]
env_info = env.reset(train_mode=True)[brain_name]
num_agents = len(env_info.agents)
print(f"Number of agents: {num_agents}")
states = env_info.vector_observations
state_size = states.shape[1]
print(
f"There are {states.shape[0]} agents. Each observes a state with length {state_size}"
)
print(f"The state for the first agent looks like:\n{states[0]}")
action_size = brain.vector_action_space_size
print(f"Size of each action: {action_size}")
policy = policy(state_size, action_size, num_agents)
for i_episode in range(1, n_episodes + 1):
env_info = env.reset(train_mode=True)[brain_name]
states = env_info.vector_observations
scores = np.zeros(num_agents)
policy.reset()
for t in range(max_t):
actions = policy.act(states)
env_info = env.step(actions)[
brain_name] # send the action to the environment
next_states = env_info.vector_observations
rewards = env_info.rewards # get the reward
dones = env_info.local_done
policy.step(states, actions, rewards, next_states, dones, t)
states = next_states
scores += env_info.rewards
if np.any(dones):
break
score_length = len(total_scores) if len(total_scores) < 100 else 100
mean_score = np.mean(scores)
min_score = np.min(scores)
max_score = np.max(scores)
total_scores.append(mean_score)
total_average_score = np.mean(total_scores[-score_length:])
end = time.time()
print(
f'\rEpisode {i_episode}\tScore TAS/Mean/Max/Min: {total_average_score:.2f}/{mean_score:.2f}/{max_score:.2f}/{min_score:.2f}\t{calc_runtime(end-start)}',
end=" ")
if i_episode % 20 == 0 or total_average_score >= score_threshold:
fap = PATH + f'results/{env_name}_{timestamp}_checkpoint_actor.pth'
torch.save(policy.actor.state_dict(), fap)
fcp = PATH + f'results/{env_name}_{timestamp}_checkpoint_critic.pth'
torch.save(policy.critic.state_dict(), fcp)
print(
f'\rEpisode {i_episode}\tScore TAS/Mean/Max/Min: {total_average_score:.2f}/{mean_score:.2f}/{max_score:.2f}/{min_score:.2f}\t{calc_runtime(end-start)}'
)
if total_average_score > score_threshold:
print(f"Solved in {i_episode} and {calc_runtime(end-start)}")
break
env.close()
return total_scores
def main():
# ---------------------------------------------------------------------------------------------------
# Logger
# ---------------------------------------------------------------------------------------------------
save_path = f"./results/Tennis_DDPG_{pd.Timestamp.utcnow().value}"
os.makedirs(save_path, exist_ok=True)
logger = logging.getLogger()
formatter = logging.Formatter(
'%(asctime)s - %(name)s - %(levelname)s : %(message)s')
handler = logging.FileHandler(
f"{save_path}/logs_p3_{pd.Timestamp.utcnow().value}.log")
handler.setLevel(logging.DEBUG)
handler.setFormatter(formatter)
logger.addHandler(handler)
# ---------------------------------------------------------------------------------------------------
# Inputs
# ---------------------------------------------------------------------------------------------------
import json
with open(f"./assets/best_agent/config.json", "r") as f:
config = json.load(f)
config["mode"] = "test"
config["n_episodes"] = 10
config["warmup"] = 0
logger.warning("+=" * 90)
logger.warning(f" RUNNING SIMULATION WITH PARAMETERS config={config}")
logger.warning("+=" * 90)
# ------------------------------------------------------------
# 1. Initialization
# ------------------------------------------------------------
# 1. Start the Environment
env = UnityEnvironment(file_name=f'./{config["env_name"]}') # mac OS
# get the default brain
brain_name = env.brain_names[0]
brain = env.brains[brain_name]
# reset the environment
env_info = env.reset(train_mode=True)[brain_name]
# number of agents
num_agents = len(env_info.agents)
print('Number of agents:', num_agents)
config["n_agents"] = num_agents
# size of each action
action_size = brain.vector_action_space_size
print('Size of each action:', action_size)
# examine the state space
states = env_info.vector_observations
state_size = states.shape[1]
print('There are {} agents. Each observes a state with length: {}'.format(
states.shape[0], state_size))
print('The state for the first agent looks like:', states[0])
config.update(dict(action_size=action_size, state_size=state_size))
# ------------------------------------------------------------
# 2. Training
# ------------------------------------------------------------
# Unity Monitor
monitor = UnityMonitor(env=env, config=config)
# Actor model
seed = 0
actor = SimpleNeuralNetHead(action_size,
SimpleNeuralNetBody(
state_size,
config["hidden_layers_actor"],
seed=seed),
func=torch.tanh,
seed=seed)
# Critic model
critic = DeepNeuralNetHeadCritic(
action_size * num_agents,
SimpleNeuralNetBody(state_size * num_agents,
config["hidden_layers_critic_body"],
func=eval(config["func_critic_body"]),
seed=seed),
hidden_layers_sizes=config["hidden_layers_critic_head"],
func=eval(config["func_critic_head"]),
end_func=None,
seed=seed)
# MADDPG Agent
agent = MADDPGAgent(
state_size=state_size,
action_size=action_size,
model_actor=actor,
model_critic=critic,
action_space_low=-1,
action_space_high=1,
config=config,
)
# ------------------------------------------------------------
# 3. Testing
# ------------------------------------------------------------
logger.warning("Entering Test Mode!")
monitor.n_episodes = 100
env.reset(train_mode=False)
env.warmup = 0
agent.warmup = 0
for a in agent.agents:
a.warmup = 0
agent.load(filepath="./assets/best_agent", mode="test")
scores = monitor.run(agent)
logger.info(f"Test Score over {len(scores)} episodes: {np.mean(scores)}")
config["test_scores"] = scores
config["best_test_score"] = max(scores)
config["avg_test_score"] = np.mean(scores)
# When finished, you can close the environment.
logger.info("Closing...")
env.close()
class Env:
'''A convinience function for generating episodes and memories
This convinience class generates a context manager that can be
used for generating a Unity environment. The Unity environment
and the OpenAI Gym environment operates slightly differently
and hence it will be difficult to create a uniform algorithm that
is able to solve everything at the sametime. This environment
tries to solve that problem.
'''
def __init__(self, fileName, showEnv=False, trainMode=True):
'''Initialize the environment
This sets up the requirements that will later be used for generating
the Unity Environment. This assumes that you will provide a binary
file for generating the environment. There are different ways in
which the environment can be generated. It can be generated either
in a *headless* mode by using showEnv as False, in which case the
environment will not show a window at startup. This is good for
training, as well as situations when you are running the environment
without the presence of an X server, especially when you are running
this environment remotely. The other thing that you can do is to
specify that this is being run in `trainMode`. In this case, the
environment will be primed for training. That is, each frame will
finish as soon as possible. This is not good for observing what is
happening. However, this significantly increases the speed of
training.
Arguments:
fileName {str} -- Path to the binary file. This file must be
the same as the one for which the `unityagents` package
has been generated.
Keyword Arguments:
showEnv {bool} -- Set this to ``True`` if you want to view the
environment (default: {False})
trainMode {bool} -- Set this to ``True`` if you want the environment
tobe in training mode (i.e. fast execution) (default: {True})
'''
try:
self.no_graphics = not showEnv
self.trainMode = trainMode
self.fileName = fileName
self.states = None
except Exception as e:
raise type(e)('lib.envs.envUnity.Env.__init__ - ERROR - ' +
str(e)).with_traceback(sys.exc_info()[2])
return
def __enter__(self):
'''generate a context manager
This will actually generate the context manager and allow you use this
within a ``with`` statement. This is the function that actually
initialized the environment and maintains it, until it is needed.
Returns:
``this`` -- Returns an instance of the same class
'''
try:
self.env = UnityEnvironment(file_name=self.fileName,
no_graphics=self.no_graphics)
# get the default brain
self.brain_name = self.env.brain_names[0]
self.brain = self.env.brains[self.brain_name]
self.env_info = self.env.reset(
train_mode=self.trainMode)[self.brain_name]
self.num_agents = len(self.env_info.agents)
self.action_size = self.brain.vector_action_space_size
except Exception as e:
raise type(e)('lib.envs.envUnity.Env.__enter__ - ERROR - ' +
str(e)).with_traceback(sys.exc_info()[2])
return self
def reset(self):
'''reset the environment before starting an episode
Returns:
status -- The current status after the reset
'''
try:
self.env.reset(train_mode=self.trainMode)
self.states = self.env_info.vector_observations
except Exception as e:
raise type(e)('lib.envs.envUnity.Env.reset - ERROR - ' +
str(e)).with_traceback(sys.exc_info()[2])
return self.states
def step(self, policy):
'''advance one step by taking an action
This function takes a policy function and generates an action
according to that particular policy. This results in the
advancement of the episode into a one step with the return
of the reward, and the next state along with any done
information.
Arguments:
policy {function} -- This function takes a state vector and
returns an action vector. It is assumed that the policy
is the correct type of policy, and is capable if taking
the right returning the right type of vector corresponding
the the policy for the current environment. It does not
check for the validity of the policy function
Returns:
list -- This returns a list of tuples containing the tuple
``(s_t, a_t, r_{t+1}, s_{t+1}, d)``. One tuple for each
agent. Even for the case of a single agent, this is going
to return a list of states
'''
try:
states = self.states.copy()
actions = policy(states)
env_info = self.env.step(actions)[self.brain_name]
next_states = env_info.vector_observations
rewards = env_info.rewards
dones = env_info.local_done
self.states = next_states
results = []
for i in range(self.num_agents):
state = states[i]
action = actions[i]
reward = rewards[i]
next_state = next_states[i]
done = dones[i]
results.append((state, action, reward, next_state, done))
except Exception as e:
raise type(e)('lib.envs.envUnity.Env.step - ERROR - ' +
str(e)).with_traceback(sys.exc_info()[2])
return results
def episode(self, policy, maxSteps=None):
'''generate data for an entire episode
This function generates an entire episde. It plays the environment
by first resetting it too the beginning, and then playing the game for
a given number of steps (or unless the game is terminated). It generates
a set of list of tuplees, again one for each agent. Rememebr that even
when the number of agents is 1, it will still return a list oof states.
Arguments:
policy {function} -- The function that takes the current state and
returns the action vector.
Keyword Arguments:
maxSteps {int or None} -- The maximum number of steps that the agent is
going to play the episode before the episode is terminated. (default:
{None} in which case the episode will continue until it actually
finishes)
Returns:
list -- This returns the list of tuples for the entire episode. Again, this
is a lsit of lists, one for each agent.
'''
try:
self.reset()
stepCount = 0
allResults = [[] for _ in range(self.num_agents)]
while True:
stepCount += 1
finished = False
results = self.step(policy)
for agent in range(self.num_agents):
state, action, reward, next_state, done = results[agent]
allResults[agent].append(results[agent])
finished = finished or done
if finished:
break
if (maxSteps is not None) and (stepCount >= maxSteps):
break
except Exception as e:
raise type(e)('lib.envs.envUnity.Env.episode - ERROR - ' +
str(e)).with_traceback(sys.exc_info()[2])
return allResults
def __exit__(self, exc, value, traceback):
'''Exit the context manager
The exit funciton that will result in exiting the
context manager. Typically one is supposed to check
the error if any at this point. This will be handled
at a higher level
Arguments:
*args {[type]} -- [description]
'''
if not exec:
self.env.close()
return True
class UnityEnv:
'''
Class for all Envs.
Standardizes the UnityEnv design to work in Lab.
Access Agents properties by: Agents - AgentSpace - AEBSpace - EnvSpace - Envs
'''
def __init__(self, env_spec, env_space, e=0):
self.env_spec = env_spec
self.env_space = env_space
self.info_space = env_space.info_space
self.e = e
util.set_attr(self, self.env_spec)
self.name = self.env_spec['name']
self.body_e = None
self.nanflat_body_e = None # nanflatten version of bodies
self.body_num = None
worker_id = int(f'{os.getpid()}{self.e+int(ps.unique_id())}'[-4:])
self.u_env = UnityEnvironment(file_name=util.get_env_path(self.name), worker_id=worker_id)
# spaces for NN auto input/output inference
logger.warn('Unity environment observation_space and action_space are constructed with invalid range. Use only their shapes.')
self.observation_spaces = []
self.action_spaces = []
for a in range(len(self.u_env.brain_names)):
observation_shape = (self.get_observable_dim(a)['state'],)
if self.get_brain(a).state_space_type == 'discrete':
observation_space = gym.spaces.Box(low=0, high=1, shape=observation_shape, dtype=np.int32)
else:
observation_space = gym.spaces.Box(low=0.0, high=1.0, shape=observation_shape, dtype=np.float32)
self.observation_spaces.append(observation_space)
if self.is_discrete(a):
action_space = gym.spaces.Discrete(self.get_action_dim(a))
else:
action_space = gym.spaces.Box(low=0.0, high=1.0, shape=(1,), dtype=np.float32)
self.action_spaces.append(action_space)
for observation_space, action_space in zip(self.observation_spaces, self.action_spaces):
set_gym_space_attr(observation_space)
set_gym_space_attr(action_space)
# TODO experiment to find out optimal benchmarking max_timestep, set
# TODO ensure clock_speed from env_spec
self.clock_speed = 1
self.clock = Clock(self.clock_speed)
self.done = False
def check_u_brain_to_agent(self):
'''Check the size match between unity brain and agent'''
u_brain_num = self.u_env.number_brains
agent_num = len(self.body_e)
assert u_brain_num == agent_num, f'There must be a Unity brain for each agent. e:{self.e}, brain: {u_brain_num} != agent: {agent_num}.'
def check_u_agent_to_body(self, env_info_a, a):
'''Check the size match between unity agent and body'''
u_agent_num = len(env_info_a.agents)
body_num = util.count_nonan(self.body_e[a])
assert u_agent_num == body_num, f'There must be a Unity agent for each body; a:{a}, e:{self.e}, agent_num: {u_agent_num} != body_num: {body_num}.'
def get_brain(self, a):
'''Get the unity-equivalent of agent, i.e. brain, to access its info'''
name_a = self.u_env.brain_names[a]
brain_a = self.u_env.brains[name_a]
return brain_a
def get_env_info(self, env_info_dict, a):
name_a = self.u_env.brain_names[a]
env_info_a = env_info_dict[name_a]
return env_info_a
@lab_api
def post_body_init(self):
'''Run init for components that need bodies to exist first, e.g. memory or architecture.'''
self.nanflat_body_e = util.nanflatten(self.body_e)
for idx, body in enumerate(self.nanflat_body_e):
body.nanflat_e_idx = idx
self.body_num = len(self.nanflat_body_e)
self.check_u_brain_to_agent()
logger.info(util.self_desc(self))
def is_discrete(self, a):
'''Check if an agent (brain) is subject to discrete actions'''
return self.get_brain(a).is_discrete()
def get_action_dim(self, a):
'''Get the action dim for an agent (brain) in env'''
return self.get_brain(a).get_action_dim()
def get_action_space(self, a):
return self.action_spaces[a]
def get_observable_dim(self, a):
'''Get the observable dim for an agent (brain) in env'''
return self.get_brain(a).get_observable_dim()
def get_observable_types(self, a):
'''Get the observable for an agent (brain) in env'''
return self.get_brain(a).get_observable_types()
def get_observation_space(self, a):
return self.observation_spaces[a]
@lab_api
def reset(self):
self.done = False
env_info_dict = self.u_env.reset(train_mode=(util.get_lab_mode() != 'dev'), config=self.env_spec.get('unity'))
_reward_e, state_e, done_e = self.env_space.aeb_space.init_data_s(ENV_DATA_NAMES, e=self.e)
for (a, b), body in util.ndenumerate_nonan(self.body_e):
env_info_a = self.get_env_info(env_info_dict, a)
self.check_u_agent_to_body(env_info_a, a)
state = env_info_a.states[b]
state_e[(a, b)] = state
done_e[(a, b)] = self.done
return _reward_e, state_e, done_e
@lab_api
def step(self, action_e):
# TODO implement clock_speed: step only if self.clock.to_step()
if self.done:
return self.reset()
action_e = util.nanflatten(action_e)
env_info_dict = self.u_env.step(action_e)
reward_e, state_e, done_e = self.env_space.aeb_space.init_data_s(ENV_DATA_NAMES, e=self.e)
for (a, b), body in util.ndenumerate_nonan(self.body_e):
env_info_a = self.get_env_info(env_info_dict, a)
reward_e[(a, b)] = env_info_a.rewards[b]
state_e[(a, b)] = env_info_a.states[b]
done_e[(a, b)] = env_info_a.local_done[b]
self.done = (util.nonan_all(done_e) or self.clock.get('t') > self.max_timestep)
return reward_e, state_e, done_e
@lab_api
def close(self):
self.u_env.close()
def make_banana_env():
env = UnityEnvironment(file_name=BANANA_APP)
yield env
env.close()
def dqn(n_episodes=2000,
max_t=1000,
eps_start=1.0,
eps_end=0.01,
eps_decay=0.995):
"""Deep Q-Learning.
Params
======
n_episodes (int): maximum number of training episodes
max_t (int): maximum number of timesteps per episode
eps_start (float): starting value of epsilon, for epsilon-greedy action selection
eps_end (float): minimum value of epsilon
eps_decay (float): multiplicative factor (per episode) for decreasing epsilon
"""
# Get environment instance
env = UnityEnvironment(file_name=BANANA_FILE)
# get the default brain
brain_name = env.brain_names[0]
brain = env.brains[brain_name]
# Reset environment
env_info = env.reset(train_mode=True)[brain_name]
# Get initial state, state size and action size
action_size = brain.vector_action_space_size
state = env_info.vector_observations[0]
state_size = len(state)
# Setup agent
agent = Agent(state_size=state_size, action_size=action_size, seed=0)
# Train!
max_avg_score = -100000 # max avg score over 100 episodes
scores = [] # list containing scores from each episode
scores_window = deque(maxlen=100) # last 100 scores
eps = eps_start # initialize epsilon
for i_episode in range(1, n_episodes + 1):
state = env.reset(train_mode=True)[brain_name].vector_observations[0]
score = 0
for t in range(max_t):
action = agent.act(state, eps)
env_info = env.step(action)[brain_name]
next_state = env_info.vector_observations[0]
reward = env_info.rewards[0]
done = env_info.local_done[0]
agent.step(state, action, reward, next_state, done)
score += reward
state = next_state
if done:
break
scores_window.append(score) # save most recent score
scores.append(score) # save most recent score
eps = max(eps_end, eps_decay * eps) # decrease epsilon
print('\rEpisode {}\tAverage Score: {:.2f}'.format(
i_episode, np.mean(scores_window)),
end="")
if i_episode % 100 == 0:
print('\rEpisode {}\tAverage Score: {:.2f}'.format(
i_episode, np.mean(scores_window)))
if np.mean(scores_window) >= 13.0 and np.mean(
scores_window) > max_avg_score:
print(
'\nEnvironment solved in {:d} episodes!\tAverage Score: {:.2f}'
.format(i_episode - 100, np.mean(scores_window)))
torch.save(agent.qnetwork_local.state_dict(), 'checkpoint.pth')
# break
max_avg_score = np.mean(scores_window)
# Close environment
env.close()
return scores
class Environment():
"""
This is a wrapper class for a Unity environment
The Unity environment is wrapped such that the API
is similar to a Gym environment.
Using this class, DQN algorithms written for Gym environments
can be re-used with minimal changes.
"""
def __init__(self,
filename_path,
worker_id=0,
train_mode=True,
no_graphics=False,
seed=0):
# Create new environment
# Create Unity environment
self._env = UnityEnvironment(file_name=filename_path, \
worker_id=worker_id,\
no_graphics=no_graphics, \
seed=seed)
# get the default brain
self._brain_name = self._env.brain_names[0]
self._brain = self._env.brains[self._brain_name]
# set the initial state
self.train_mode = train_mode
self._env_info = self._env.reset(
train_mode=train_mode)[self._brain_name]
self._state = self._env_info.vector_observations[0]
# define state_size and action_size
self.state_size = len(self._state)
self.action_size = self._brain.vector_action_space_size
def reset(self):
# reset the environment
self._env_info = self._env.reset(
train_mode=self.train_mode)[self._brain_name]
self._state = self._env_info.vector_observations[0]
# return the state vector
return self._state
def step(self, action):
# send the action to the environment
self._env_info = self._env.step(action)[self._brain_name]
# get the next state
next_state = self._env_info.vector_observations[0]
# get the reward
reward = self._env_info.rewards[0]
# check if terminal state is reached
done = self._env_info.local_done[0]
# create dummy value to keep API compatible
dummy = 0
# return the next_state vector, the reward,
# and whether the terminal state was reached
return next_state, reward, done, dummy
def close(self):
self._env.close()
pass
_action_size: int = 4
_state_size: int = 33
_agent = Agent(_state_size,
_action_size,
gamma=0.99,
lr_actor=0.0002,
lr_critic=0.0003,
tau=0.002,
weight_decay=0.0001,
buffer_size=1000000,
batch_size=128)
# with this boolean you can decide if you just want to watch an agent or train the agent yourself
watch_only = True
if watch_only:
watch_agent_from_pth_file(_env, _brain_name, _agent,
'./checkpoint-actor.pth',
'./checkpoint-critic.pth')
else:
scores = train_agent(_env,
_brain_name,
_agent,
n_episodes=500,
max_steps=1500)
watch_agent(_env, _brain_name, _agent)
plot_scores(scores=scores, sma_window=10)
_env.close()
class UnityEnv(BaseEnv):
'''
Wrapper for Unity ML-Agents env to work with the Lab.
e.g. env_spec
"env": [{
"name": "gridworld",
"max_t": 20,
"max_frame": 3,
"unity": {
"gridSize": 6,
"numObstacles": 2,
"numGoals": 1
}
}],
'''
def __init__(self, spec):
super().__init__(spec)
util.set_attr(self, self.env_spec, ['unity'])
worker_id = int(f'{os.getpid()}{self.e+int(ps.unique_id())}'[-4:])
seed = ps.get(spec, 'meta.random_seed')
# TODO update Unity ml-agents to use seed=seed below
self.u_env = UnityEnvironment(file_name=get_env_path(self.name), worker_id=worker_id)
self.patch_gym_spaces(self.u_env)
self._set_attr_from_u_env(self.u_env)
assert self.max_t is not None
self.tracked_reward = 0
self.total_reward = 0
logger.info(util.self_desc(self))
def patch_gym_spaces(self, u_env):
'''
For standardization, use gym spaces to represent observation and action spaces for Unity.
This method iterates through the multiple brains (multiagent) then constructs and returns lists of observation_spaces and action_spaces
'''
observation_spaces = []
action_spaces = []
for a in range(len(u_env.brain_names)):
brain = self._get_brain(u_env, a)
observation_shape = (brain.get_observable_dim()['state'],)
if brain.is_discrete():
dtype = np.int32
action_space = spaces.Discrete(brain.get_action_dim())
else:
dtype = np.float32
action_space = spaces.Box(low=0.0, high=1.0, shape=(1,), dtype=dtype)
observation_space = spaces.Box(low=0, high=1, shape=observation_shape, dtype=dtype)
set_gym_space_attr(observation_space)
set_gym_space_attr(action_space)
observation_spaces.append(observation_space)
action_spaces.append(action_space)
# set for singleton
u_env.observation_space = observation_spaces[0]
u_env.action_space = action_spaces[0]
return observation_spaces, action_spaces
def _get_brain(self, u_env, a):
'''Get the unity-equivalent of agent, i.e. brain, to access its info'''
name_a = u_env.brain_names[a]
brain_a = u_env.brains[name_a]
return brain_a
def _check_u_brain_to_agent(self):
'''Check the size match between unity brain and agent'''
u_brain_num = self.u_env.number_brains
agent_num = 1 # TODO rework unity outdated
assert u_brain_num == agent_num, f'There must be a Unity brain for each agent. e:{self.e}, brain: {u_brain_num} != agent: {agent_num}.'
def _check_u_agent_to_body(self, env_info_a, a):
'''Check the size match between unity agent and body'''
u_agent_num = len(env_info_a.agents)
body_num = 1 # rework unity
assert u_agent_num == body_num, f'There must be a Unity agent for each body; a:{a}, e:{self.e}, agent_num: {u_agent_num} != body_num: {body_num}.'
def _get_env_info(self, env_info_dict, a):
'''Unity API returns a env_info_dict. Use this method to pull brain(env)-specific usable for lab API'''
name_a = self.u_env.brain_names[a]
env_info_a = env_info_dict[name_a]
return env_info_a
def seed(self, seed):
self.u_env.seed(seed)
@lab_api
def reset(self):
self.done = False
env_info_dict = self.u_env.reset(train_mode=(util.get_lab_mode() != 'dev'), config=self.env_spec.get('unity'))
a, b = 0, 0 # default singleton agent and body
env_info_a = self._get_env_info(env_info_dict, a)
state = env_info_a.states[b]
return state
@lab_api
def step(self, action):
env_info_dict = self.u_env.step(action)
a, b = 0, 0 # default singleton agent and body
env_info_a = self._get_env_info(env_info_dict, a)
state = env_info_a.states[b]
reward = env_info_a.rewards[b]
reward = try_scale_reward(self, reward)
done = env_info_a.local_done[b]
if not self.is_venv and self.clock.t > self.max_t:
done = True
self.done = done
info = {'env_info': env_info_a}
# track total_reward
self.tracked_reward += reward
if done:
self.total_reward = self.tracked_reward
self.tracked_reward = 0 # reset
info.update({'total_reward': self.total_reward})
return state, reward, done, info
@lab_api
def close(self):
self.u_env.close()
def main(seed=seed):
# ---------------------------------------------------------------------------------------------------
# Logger
# ---------------------------------------------------------------------------------------------------
save_path = f"./results/Reacher_DDPG_{pd.Timestamp.utcnow().value}"
os.makedirs(save_path, exist_ok=True)
logger = logging.getLogger()
formatter = logging.Formatter(
'%(asctime)s - %(name)s - %(levelname)s : %(message)s')
handler = logging.FileHandler(
f"{save_path}/logs_navigation_{pd.Timestamp.utcnow().value}.log")
handler.setLevel(logging.DEBUG)
handler.setFormatter(formatter)
logger.addHandler(handler)
# ---------------------------------------------------------------------------------------------------
# Inputs
# ---------------------------------------------------------------------------------------------------
n_episodes = 300
config = dict(
# Environment parameters
env_name="Reacher",
n_episodes=n_episodes,
length_episode=1500,
save_every=100,
save_path=save_path,
mode="train", # "train" or "test"
evaluate_every=
5000, # Number of training episodes before 1 evaluation episode
eps_decay=1, # Epsilon decay rate
# Agent Parameters
agent="DDPG",
hidden_layers_actor=(200, 150), # (50, 50, 15), # (200, 150), #
hidden_layers_critic_body=(400, ), # (50, 50,), #
hidden_layers_critic_head=(300, ), # (50,), # (300,)
func_critic_body="F.leaky_relu", #
func_critic_head="F.leaky_relu", #
func_actor_body="F.leaky_relu", #
lr_scheduler=
None, #{'scheduler_type': "multistep", # "step", "exp" or "decay", "multistep"
# 'gamma': 0.5, # 0.99999,
# 'step_size': 1,
# 'milestones': [15*1000 * i for i in range(1, 6)],
# 'max_epochs': n_episodes},
TAU=1e-3, # for soft update of target parameters
BUFFER_SIZE=int(1e6), # replay buffer size
BATCH_SIZE=128, # minibatch size
GAMMA=0.99, # discount factor
LR_ACTOR=1e-3, # learning rate of the actor
LR_CRITIC=1e-3, # learning rate of the critic
WEIGHT_DECAY=0, # L2 weight decay
UPDATE_EVERY=1, # Number of actions before making a learning step
action_noise="OU", #
action_noise_scale=1,
weights_noise=None, #
state_normalizer="BatchNorm", # "RunningMeanStd" or "BatchNorm"
warmup=0, # Number of random actions to start with as a warm-up
start_time=str(pd.Timestamp.utcnow()),
random_seed=seed,
threshold=30)
logger.warning("+=" * 90)
logger.warning(f" RUNNING SIMULATION WITH PARAMETERS config={config}")
logger.warning("+=" * 90)
# ------------------------------------------------------------
# 1. Initialization
# ------------------------------------------------------------
# 1. Start the Environment
# env = UnityEnvironment(file_name=f'./Reacher_Linux_2/Reacher.x86_64') # Linux
env = UnityEnvironment(file_name=f'./{config["env_name"]}') # mac OS
# get the default brain
brain_name = env.brain_names[0]
brain = env.brains[brain_name]
# reset the environment
env_info = env.reset(train_mode=True)[brain_name]
# number of agents
num_agents = len(env_info.agents)
print('Number of agents:', num_agents)
config["n_agents"] = num_agents
# size of each action
action_size = brain.vector_action_space_size
print('Size of each action:', action_size)
# examine the state space
states = env_info.vector_observations
state_size = states.shape[1]
print('There are {} agents. Each observes a state with length: {}'.format(
states.shape[0], state_size))
print('The state for the first agent looks like:', states[0])
config.update(dict(action_size=action_size, state_size=state_size))
# ------------------------------------------------------------
# 2. Training
# ------------------------------------------------------------
# Unity Monitor
monitor = UnityMonitor(env=env, config=config)
if config["mode"] == "train":
# Actor model
seed = 0
actor = SimpleNeuralNetHead(action_size,
SimpleNeuralNetBody(
state_size,
config["hidden_layers_actor"],
seed=seed),
func=F.tanh,
seed=seed)
actor_target = SimpleNeuralNetHead(action_size,
SimpleNeuralNetBody(
state_size,
config["hidden_layers_actor"],
seed=seed),
func=F.tanh,
seed=seed)
# Critic model
critic = DeepNeuralNetHeadCritic(
action_size,
SimpleNeuralNetBody(state_size,
config["hidden_layers_critic_body"],
func=eval(config["func_critic_body"]),
seed=seed),
hidden_layers_sizes=config["hidden_layers_critic_head"],
func=eval(config["func_critic_head"]),
end_func=None,
seed=seed)
critic_target = DeepNeuralNetHeadCritic(
action_size,
SimpleNeuralNetBody(state_size,
config["hidden_layers_critic_body"],
func=eval(config["func_critic_body"]),
seed=seed),
hidden_layers_sizes=config["hidden_layers_critic_head"],
func=eval(config["func_critic_head"]),
end_func=None,
seed=seed)
# DDPG Agent
agent = DDPGAgent(
state_size=state_size,
action_size=action_size,
model_actor=actor,
model_critic=critic,
# actor_target=actor_target, critic_target=critic_target,
action_space_low=-1,
action_space_high=1,
config=config,
)
# Training
start = pd.Timestamp.utcnow()
scores = monitor.run(agent)
logger.info("Average Score last 100 episodes: {}".format(
np.mean(scores[-100:])))
elapsed_time = pd.Timedelta(pd.Timestamp.utcnow() -
start).total_seconds()
logger.info(f"Elapsed Time: {elapsed_time} seconds")
# ------------------------------------------------------------
# 3. Testing
# ------------------------------------------------------------
else:
agent = DDPGAgent.load(filepath=config['save_path'], mode="test")
scores = monitor.run(agent)
logger.info(
f"Test Score over {len(scores)} episodes: {np.mean(scores)}")
config["test_scores"] = scores
config["best_test_score"] = max(scores)
config["avg_test_score"] = np.mean(scores)
# When finished, you can close the environment.
logger.info("Closing...")
env.close()
class CollectBananaENV:
def __init__(self, env_type='vector', mode='train'):
"""
This is a wrapper on top of the brain environment that provides useful function to render the environment
call very similar to like calling the open AI gym environement.
Wrapper Code referred from : https://github.com/yingweiy/drlnd_project1_navigation
:param env_type:
"""
self.env_type = env_type
if env_type == 'vector':
self.base_env = UnityEnvironment('Banana.app')
elif env_type == 'visual':
self.base_env = UnityEnvironment('VisualBanana.app')
else:
raise ValueError('Env Name not understood ....')
# get the default brain
self.brain_name = self.base_env.brain_names[0]
self.brain = self.base_env.brains[self.brain_name]
self.action_size = self.brain.vector_action_space_size
if mode == 'train':
self.train = True
else:
self.train = False
self.frame1 = None
self.frame2 = None
self.frame3 = None
self.reset()
if env_type == 'vector':
self.state_size = len(self.state)
elif env_type == 'visual':
self.state_size = self.state.shape
else:
raise ValueError('Environment type not understood ....')
print(self.state_size)
def get_state(self):
if self.env_type == 'visual':
# The DQN paper says to stack 4 frames while running the image through the neural network
# state size is 1,84,84,3
# Rearrange from NHWC to NCHW (Pytorch uses 3d covolution in NCHW format, cross corellation across channels)
frame = np.transpose(self.env_info.visual_observations[0],
(0, 3, 1, 2))[:, :, :, :]
frame_size = frame.shape # 1,3,84,84
# print(frame_size)
self.state = np.zeros(
(1, frame_size[1], 4, frame_size[2], frame_size[3]))
self.state[0, :, 0, :, :] = frame
if self.frame1 is not None:
self.state[0, :, 1, :, :] = self.frame1
if self.frame2 is not None:
self.state[0, :, 2, :, :] = self.frame2
if self.frame3 is not None:
self.state[0, :, 3, :, :] = self.frame3
# Keep the last 3 frames in the memory to be accessed or stacked with the new input frame to supply as
# input to the convolution network
self.frame3 = self.frame2
self.frame2 = self.frame1
self.frame1 = frame
# self.state = np.squeeze(self.state) # We squeeze it becasue the code implemented in buffer will
# unsqueeze the array
elif self.env_type == 'vector':
self.state = self.env_info.vector_observations[0]
else:
raise ValueError('Environment name %s not understood.' %
str(self.env_type))
def reset(self):
self.env_info = self.base_env.reset(
train_mode=self.train)[self.brain_name]
self.get_state()
return self.state
def step(self, action):
"""
This function returns the value in the format of Open AI gym
:param action:
:return:
"""
self.env_info = self.base_env.step(action)[
self.brain_name] # send the action to the environment
self.get_state()
reward = self.env_info.rewards[0]
done = self.env_info.local_done[0]
return self.state, reward, done, None
def close(self):
self.base_env.close()
class UnityEnv(BaseEnv):
r"""
Basic Unity ML Agent environment.
config example:
"env": {
"name": "Reacher",
"type": "unity",
"seed": 0,
"to_render": True,
"frame_sleep": 0.001,
"max_steps": 1000,
"one_hot": None,
"action_bins": None,
"reward_scale": None,
"num_envs": None,
}
"""
def __init__(self, config):
super(UnityEnv, self).__init__(config)
self._env = UnityEnvironment(file_name=get_env_path(self.name), seed=self.seed)
self.patch_gym_spaces(self._env)
self._set_attr_from_u_env(self._env)
# TODO: Logging
print(utils.describe(self))
def reset(self):
self.done = False
info_dict = self._env.reset(train_mode=self.to_render)
env_info = self._get_env_info(info_dict, 0)
state = env_info.vector_observations[0]
return state
def step(self, action):
info_dict = self._env.step(action)
env_info = self._get_env_info(info_dict, 0)
state = env_info.vector_observations[0]
reward = env_info.rewards[0]
done = env_info.local_done[0]
return state, reward, done, env_info
def render(self):
pass
def close(self):
self._env.close()
def _get_brain(self, env, brain_index):
r"""
Get the unity-equivalent of agent, i.e. brain, to access its info
:param env:
:param brain_index:
:return:
"""
brain_name = env.brain_names[brain_index]
brain = env.brains[brain_name]
return brain
def patch_gym_spaces(self, env):
r"""
For standardization, use gym spaces to represent observation and action spaces for Unity.
This method iterates through the multiple brains (multiagent) then constructs and returns lists of observation_spaces and action_spaces
:param env:
:return:
"""
observation_spaces = []
action_spaces = []
for brain_index in range(len(env.brain_names)):
brain = self._get_brain(env, brain_index)
# TODO: Logging
utils.describe(brain)
observation_shape = (brain.get_observable_dim()['state'],)
action_dim = (brain.get_action_dim(),)
if brain.is_discrete():
dtype = np.int32
action_space = spaces.Discrete(brain.get_action_dim())
else:
dtype = np.float32
action_space = spaces.Box(low=0.0, high=1.0, shape=action_dim, dtype=dtype)
observation_space = spaces.Box(low=0, high=1, shape=observation_shape, dtype=dtype)
utils.set_gym_space_attr(observation_space)
utils.set_gym_space_attr(action_space)
observation_spaces.append(observation_space)
action_spaces.append(action_space)
# set for singleton
env.observation_space = observation_spaces[0]
env.action_space = action_spaces[0]
return observation_spaces, action_spaces
def _get_env_info(self, env_info_dict, index):
r"""
Unity API returns a env_info_dict. Use this method to pull brain(env)-specific
:param env_info_dict:
:param index:
:return:
"""
brain_name = self._env.brain_names[index]
env_info = env_info_dict[brain_name]
return env_info
def loaded_unity_env(file_name):
env = UnityEnvironment(str(file_name), no_graphics=True)
try:
yield env
finally:
env.close()
class BananaEnvWrapper(object):
blank_state = torch.zeros(1, 37, dtype=torch.uint8)
""" Wraps the udacity enviroment into an object behaving like an atari env
"""
def __init__(self, train_mode=True, device='cuda'):
self.train_mode = train_mode
self.device = device
self.unity_env = UnityEnvironment(
file_name="/home/philipp/udacity/deep-reinforcement-learning/p1_navigation/Banana_Linux/Banana.x86_64")
# get the default brain
self.brain_name = self.unity_env.brain_names[0]
brain = self.unity_env.brains[self.brain_name]
# reset the environment
env_info = self.unity_env.reset(train_mode=self.train_mode)[self.brain_name]
# number of agents in the environment
print('Number of agents:', len(env_info.agents))
# number of actions
self._action_space = brain.vector_action_space_size
print('Number of actions:', self._action_space)
# examine the state space
state = env_info.vector_observations[0]
print('States look like:', state)
state_size = len(state)
print('States have length:', state_size)
self.score = 0
def eval(self):
self.train_mode = False
def train(self):
self.train_mode = True
def reset(self):
print("Score: %d" % self.score)
self.score = 0
env_info = self.unity_env.reset(train_mode=self.train_mode)[self.brain_name]
return self._wrap_state(env_info.vector_observations[0]) # Return current state
def step(self, action):
env_info = self.unity_env.step(action)[self.brain_name]
state = env_info.vector_observations[0] # get the current state
reward = env_info.rewards[0] # get the reward
done = env_info.local_done[0] # see if episode has finished
self.score += reward # update the score
return self._wrap_state(state), reward, done
def close(self):
self.unity_env.close()
def action_space(self):
return self._action_space
def _wrap_state(self, state):
state = state[np.newaxis, np.newaxis, :]
# todo: Normalization
return torch.tensor(state, dtype=torch.float32, device=self.device)
class TrainerController(object):
def __init__(self, env_path, run_id, save_freq, curriculum_file,
fast_simulation, load, train, worker_id, keep_checkpoints,
lesson, seed, docker_target_name, trainer_config_path,
use_data_gatherer):
"""
:param env_path: Location to the environment executable to be loaded.
:param run_id: The sub-directory name for model and summary statistics
:param save_freq: Frequency at which to save model
:param curriculum_file: Curriculum json file for environment
:param fast_simulation: Whether to run the game at training speed
:param load: Whether to load the model or randomly initialize
:param train: Whether to train model, or only run inference
:param worker_id: Number to add to communication port (5005). Used for multi-environment
:param keep_checkpoints: How many model checkpoints to keep
:param lesson: Start learning from this lesson
:param seed: Random seed used for training.
:param docker_target_name: Name of docker volume that will contain all data.
:param trainer_config_path: Fully qualified path to location of trainer configuration file
"""
''' Here's a small change (this only happens if code is launched with the '--data-gatherer' flag) '''
self.use_data_gatherer = use_data_gatherer
self.trainer_config_path = trainer_config_path
env_path = (env_path.strip().replace('.app', '').replace(
'.exe', '').replace('.x86_64', '').replace('.x86', '')
) # Strip out executable extensions if passed
# Recognize and use docker volume if one is passed as an argument
if docker_target_name == '':
self.docker_training = False
self.model_path = './models/{run_id}'.format(run_id=run_id)
self.curriculum_file = curriculum_file
self.summaries_dir = './summaries'
else:
self.docker_training = True
self.model_path = '/{docker_target_name}/models/{run_id}'.format(
docker_target_name=docker_target_name, run_id=run_id)
env_path = '/{docker_target_name}/{env_name}'.format(
docker_target_name=docker_target_name, env_name=env_path)
if curriculum_file is None:
self.curriculum_file = None
else:
self.curriculum_file = '/{docker_target_name}/{curriculum_file}'.format(
docker_target_name=docker_target_name,
curriculum_file=curriculum_file)
self.summaries_dir = '/{docker_target_name}/summaries'.format(
docker_target_name=docker_target_name)
self.logger = logging.getLogger("unityagents")
self.run_id = run_id
self.save_freq = save_freq
self.lesson = lesson
self.fast_simulation = fast_simulation
self.load_model = load
self.train_model = train
self.worker_id = worker_id
self.keep_checkpoints = keep_checkpoints
self.trainers = {}
if seed == -1:
seed = np.random.randint(0, 999999)
self.seed = seed
np.random.seed(self.seed)
tf.set_random_seed(self.seed)
self.env = UnityEnvironment(file_name=env_path,
worker_id=self.worker_id,
curriculum=self.curriculum_file,
seed=self.seed,
docker_training=self.docker_training)
self.env_name = os.path.basename(
os.path.normpath(env_path)) # Extract out name of environment
def _get_progress(self):
if self.curriculum_file is not None:
progress = 0
if self.env.curriculum.measure_type == "progress":
for brain_name in self.env.external_brain_names:
progress += self.trainers[
brain_name].get_step / self.trainers[
brain_name].get_max_steps
return progress / len(self.env.external_brain_names)
elif self.env.curriculum.measure_type == "reward":
for brain_name in self.env.external_brain_names:
progress += self.trainers[brain_name].get_last_reward
return progress
else:
return None
else:
return None
def _process_graph(self):
nodes = []
scopes = []
for brain_name in self.trainers.keys():
if self.trainers[brain_name].graph_scope is not None:
scope = self.trainers[brain_name].graph_scope + '/'
if scope == '/':
scope = ''
scopes += [scope]
if self.trainers[brain_name].parameters[
"trainer"] == "imitation":
nodes += [scope + x for x in ["action"]]
elif not self.trainers[brain_name].parameters["use_recurrent"]:
nodes += [
scope + x
for x in ["action", "value_estimate", "action_probs"]
]
else:
node_list = [
"action", "value_estimate", "action_probs",
"recurrent_out", "memory_size"
]
nodes += [scope + x for x in node_list]
if len(scopes) > 1:
self.logger.info("List of available scopes :")
for scope in scopes:
self.logger.info("\t" + scope)
self.logger.info("List of nodes to export :")
for n in nodes:
self.logger.info("\t" + n)
return nodes
def _save_model(self, sess, saver, steps=0):
"""
Saves current model to checkpoint folder.
:param sess: Current Tensorflow session.
:param steps: Current number of steps in training process.
:param saver: Tensorflow saver for session.
"""
last_checkpoint = self.model_path + '/model-' + str(steps) + '.cptk'
saver.save(sess, last_checkpoint)
tf.train.write_graph(sess.graph_def,
self.model_path,
'raw_graph_def.pb',
as_text=False)
self.logger.info("Saved Model")
def _export_graph(self):
"""
Exports latest saved model to .bytes format for Unity embedding.
"""
target_nodes = ','.join(self._process_graph())
ckpt = tf.train.get_checkpoint_state(self.model_path)
freeze_graph.freeze_graph(
input_graph=self.model_path + '/raw_graph_def.pb',
input_binary=True,
input_checkpoint=ckpt.model_checkpoint_path,
output_node_names=target_nodes,
######## FOLOWING LINE UGLY FIX: only return first 20 characters of run_id ######
output_graph=self.model_path + '/' + self.env_name + "_" +
self.run_id[:20] + '.bytes',
clear_devices=True,
initializer_nodes="",
input_saver="",
restore_op_name="save/restore_all",
filename_tensor_name="save/Const:0")
def _initialize_trainers(self, trainer_config, sess):
trainer_parameters_dict = {}
self.trainers = {}
for brain_name in self.env.external_brain_names:
trainer_parameters = trainer_config['default'].copy()
if len(self.env.external_brain_names) > 1:
graph_scope = re.sub('[^0-9a-zA-Z]+', '-', brain_name)
trainer_parameters['graph_scope'] = graph_scope
trainer_parameters['summary_path'] = '{basedir}/{name}'.format(
basedir=self.summaries_dir,
name=str(self.run_id) + '_' + graph_scope)
else:
trainer_parameters['graph_scope'] = ''
trainer_parameters['summary_path'] = '{basedir}/{name}'.format(
basedir=self.summaries_dir, name=str(self.run_id))
if brain_name in trainer_config:
_brain_key = brain_name
while not isinstance(trainer_config[_brain_key], dict):
_brain_key = trainer_config[_brain_key]
for k in trainer_config[_brain_key]:
trainer_parameters[k] = trainer_config[_brain_key][k]
trainer_parameters_dict[brain_name] = trainer_parameters.copy()
for brain_name in self.env.external_brain_names:
if trainer_parameters_dict[brain_name]['trainer'] == "imitation":
self.trainers[brain_name] = BehavioralCloningTrainer(
sess, self.env, brain_name,
trainer_parameters_dict[brain_name], self.train_model,
self.seed)
elif trainer_parameters_dict[brain_name]['trainer'] == "ppo":
self.trainers[brain_name] = PPOTrainer(
sess, self.env, brain_name,
trainer_parameters_dict[brain_name], self.train_model,
self.seed, self.use_data_gatherer)
else:
raise UnityEnvironmentException(
"The trainer config contains an unknown trainer type for brain {}"
.format(brain_name))
def _load_config(self):
try:
with open(self.trainer_config_path) as data_file:
trainer_config = yaml.load(data_file)
return trainer_config
except IOError:
raise UnityEnvironmentException(
"""Parameter file could not be found here {}.
Will use default Hyper parameters"""
.format(self.trainer_config_path))
except UnicodeDecodeError:
raise UnityEnvironmentException(
"There was an error decoding Trainer Config from this path : {}"
.format(self.trainer_config_path))
@staticmethod
def _create_model_path(model_path):
try:
if not os.path.exists(model_path):
os.makedirs(model_path)
except Exception:
raise UnityEnvironmentException(
"The folder {} containing the generated model could not be accessed."
" Please make sure the permissions are set correctly.".format(
model_path))
def start_learning(self):
self.env.curriculum.set_lesson_number(self.lesson)
trainer_config = self._load_config()
self._create_model_path(self.model_path)
tf.reset_default_graph()
with tf.Session() as sess:
self._initialize_trainers(trainer_config, sess)
for k, t in self.trainers.items():
self.logger.info(t)
init = tf.global_variables_initializer()
saver = tf.train.Saver(max_to_keep=self.keep_checkpoints)
# Instantiate model parameters
if self.load_model:
self.logger.info('Loading Model...')
ckpt = tf.train.get_checkpoint_state(self.model_path)
if ckpt is None:
self.logger.info(
'The model {0} could not be found. Make sure you specified the right '
'--run-id'.format(self.model_path))
saver.restore(sess, ckpt.model_checkpoint_path)
else:
sess.run(init)
global_step = 0 # This is only for saving the model
self.env.curriculum.increment_lesson(self._get_progress())
curr_info = self.env.reset(train_mode=self.fast_simulation)
if self.train_model:
for brain_name, trainer in self.trainers.items():
trainer.write_tensorboard_text('Hyperparameters',
trainer.parameters)
try:
while any([
t.get_step <= t.get_max_steps
for k, t in self.trainers.items()
]) or not self.train_model:
if debug_print:
print("|", end='', flush=True)
if self.env.global_done:
self.env.curriculum.increment_lesson(
self._get_progress())
curr_info = self.env.reset(
train_mode=self.fast_simulation)
for brain_name, trainer in self.trainers.items():
trainer.end_episode()
if data_gatherer['reset_after_each_frame']:
curr_info = self.env.reset(
train_mode=self.fast_simulation)
# Decide and take an action
take_action_vector, take_action_memories, take_action_text, take_action_outputs = {}, {}, {}, {}
for brain_name, trainer in self.trainers.items():
(take_action_vector[brain_name],
take_action_memories[brain_name],
take_action_text[brain_name],
take_action_outputs[brain_name]
) = trainer.take_action(curr_info)
new_info = self.env.step(vector_action=take_action_vector,
memory=take_action_memories,
text_action=take_action_text)
''' ----- '''
''' Enabling data gathering disables the normal functionality.... '''
if self.use_data_gatherer:
if data_gatherer['firstRun']:
print("---")
print("NORMAL FUNCTIONALITY DISABLED!")
print(
"Now we just sample stats from the initial distribution and save them:"
)
print("Save dir: {}".format(data_gatherer['dir']))
print("---")
print(
"If you did not expect to see this, NOW is the time to [ctrl-C]! (otherwise: [enter] to continue...)"
)
''' Create the folder-structure if it is needed: '''
paths = [
settings['dir_base'],
settings['dir_base'] + settings['project'],
data_gatherer['dir']
]
for p in paths:
if not os.path.isdir(p):
os.makedirs(p)
print("Created path: {}".format(p))
else:
print("Reusing existing: {}".format(p))
ape = input()
data_gatherer['firstRun'] = False
#if data_gatherer['reset_after_each_frame']:
# curr_info = self.env.reset(train_mode=self.fast_simulation)
# take_action_vector, take_action_memories, take_action_text, take_action_outputs = {}, {}, {}, {}
# for brain_name, trainer in self.trainers.items():
# (take_action_vector[brain_name],
# take_action_memories[brain_name],
# take_action_text[brain_name],
# take_action_outputs[brain_name]) = trainer.take_action(curr_info)
# new_info = self.env.step(vector_action=take_action_vector, memory=take_action_memories,
# text_action=take_action_text)
is_done = False
for x in new_info:
for l in range(len(new_info[x].agents)):
is_done = is_done or new_info[x].local_done[l]
if data_gatherer['idx'] == data_gatherer[
'n'] or is_done:
#WRITE_TO_FILE....
print("Saving chunk {}... ({} samples)".format(
data_gatherer['n_chunks'],
data_gatherer['idx']))
with open(
data_gatherer['dir'] +
data_gatherer['file_base'] +
"chunk{}.pkl".format(
str(data_gatherer['n_chunks']).zfill(
5)), 'wb') as outfile:
pickle.dump(
data_gatherer['data']
[:data_gatherer['idx'], :, :, :].reshape(
(-1, ) + data_gatherer['obs_size']),
outfile, pickle.HIGHEST_PROTOCOL)
#Prep next:
data_gatherer['n_chunks'] += 1
data_gatherer['data'] = np.empty(
data_gatherer['size'], dtype=np.uint8)
data_gatherer['idx'] = 0
if data_gatherer['n_chunks'] == 1500:
print("Total samples gathered: {}".format(
(data_gatherer['n_chunks'] - 1000) * 1000))
exit()
data_gatherer['data'][
data_gatherer['idx'], :, :, :] = (
255 *
new_info["PepperBrain"].visual_observations[0]
).astype(np.uint8)
data_gatherer['idx'] += 1
if data_gatherer['reset_after_each_frame']:
continue
''' ----- '''
if settings['store_as_int']:
for key in new_info:
for x in range(
len(new_info[key].visual_observations)):
new_info[key].visual_observations[x] = (
255 * new_info[key].visual_observations[x]
).astype(np.uint8)
for brain_name, trainer in self.trainers.items():
if debug_print:
print(".", end='', flush=True)
trainer.add_experiences(
curr_info, new_info,
take_action_outputs[brain_name])
trainer.process_experiences(curr_info, new_info)
if trainer.is_ready_update(
) and self.train_model and trainer.get_step <= trainer.get_max_steps:
if debug_print:
print("!", end='', flush=True)
# Perform gradient descent with experience buffer
print("Updating model... ", end='', flush=True)
t = time.time()
trainer.update_model()
print("[x] Done in {} seconds.".format(
time.time()))
# Write training statistics to Tensorboard.
if debug_print:
print(",", end='', flush=True)
trainer.write_summary(
self.env.curriculum.lesson_number)
if self.train_model and trainer.get_step <= trainer.get_max_steps:
if debug_print:
print("?", end='', flush=True)
trainer.increment_step()
trainer.update_last_reward()
if self.train_model and trainer.get_step <= trainer.get_max_steps:
global_step += 1
if global_step % self.save_freq == 0 and global_step != 0 and self.train_model:
if debug_print:
print("x", end='', flush=True)
# Save Tensorflow model
self._save_model(sess, steps=global_step, saver=saver)
curr_info = new_info
# Final save Tensorflow model
if global_step != 0 and self.train_model:
self._save_model(sess, steps=global_step, saver=saver)
except KeyboardInterrupt:
if self.train_model:
self.logger.info(
"Learning was interrupted. Please wait while the graph is generated."
)
self._save_model(sess, steps=global_step, saver=saver)
pass
self.env.close()
if self.train_model:
self._export_graph()
def main():
seeding()
number_of_episodes = 20000
episode_length = 1000
batchsize = 256
save_interval = 1000
rewards_deque = deque(maxlen=100)
rewards_all = []
noise = 1.0
noise_reduction = 1.0
log_path = os.getcwd() + "/log"
model_dir = os.getcwd() + "/model_dir"
os.makedirs(model_dir, exist_ok=True)
""" Info about the UnityEnvironment
brain_name: 'TennisBrain'
brain: ['brain_name', 'camera_resolutions',
'num_stacked_vector_observations', 'number_visual_observations',
'vector_action_descriptions', 'vector_action_space_size',
'vector_action_space_type', 'vector_observation_space_size',
'vector_observation_space_type']]
"""
env = UnityEnvironment(file_name="Tennis.app")
brain_name = env.brain_names[0]
brain = env.brains[brain_name]
buffer = ReplayBuffer(int(1e5))
# initialize policy and critic
maddpg = MADDPG()
logger = SummaryWriter(log_dir=log_path)
# ------------------------------ training ------------------------------ #
# show progressbar
import progressbar as pb
widget = [
'episode: ',
pb.Counter(), '/',
str(number_of_episodes), ' ',
pb.Percentage(), ' ',
pb.ETA(), ' ',
pb.Bar(marker=pb.RotatingMarker()), ' '
]
timer = pb.ProgressBar(widgets=widget, maxval=number_of_episodes).start()
for episode in range(1, number_of_episodes + 1):
timer.update(episode)
rewards_this_episode = np.zeros((2, ))
""" Info about the UnityEnvironment
env_info: ['agents', 'local_done', 'max_reached', 'memories',
'previous_text_actions', 'previous_vector_actions', 'rewards',
'text_observations', 'vector_observations', 'visual_observations']
actions: List(num_agents=2, action_size=2)
states: List((24,), (24,))
rewards: List(2,)
dones: List(2,)
"""
env_info = env.reset(train_mode=True)[brain_name]
states = env_info.vector_observations
for episode_t in range(episode_length):
# reset the OUNoise for each agent.
for i in range(2):
maddpg.maddpg_agent[i].noise.reset()
actions = maddpg.act(states, noise=noise)
env_info = env.step(actions)[brain_name]
noise *= noise_reduction
next_states = env_info.vector_observations
rewards = env_info.rewards
dones = env_info.local_done
# add data to buffer
transition = (states, actions, rewards, next_states, dones)
buffer.push(transition)
rewards_this_episode += rewards
states = next_states
if any(dones):
break
# update the local and target network
if len(buffer) > batchsize:
# update the local network
for _ in range(5):
for a_i in range(2):
samples = buffer.sample(batchsize)
maddpg.update(samples, a_i, logger)
# soft update the target network
maddpg.update_targets()
rewards_all.append(rewards_this_episode)
rewards_deque.append(np.max(rewards_this_episode))
average_score = np.mean(rewards_deque)
# --------------------- Logging for TensorBoard --------------------- #
logger.add_scalars('rewards', {
'agent0': rewards_this_episode[0],
'agent1': rewards_this_episode[1]
}, episode)
logger.add_scalars('global', {
'score': np.max(rewards_this_episode),
'average_score': average_score
}, episode)
# -------------------------- Save the model -------------------------- #
save_dict_list = []
if episode % save_interval == 0 or average_score >= 0.5:
for i in range(2):
save_dict = \
{'actor_params' : maddpg.maddpg_agent[i].actor.state_dict(),
'actor_optim_params': maddpg.maddpg_agent[i].actor_optimizer.state_dict(),
'critic_params' : maddpg.maddpg_agent[i].critic.state_dict(),
'critic_optim_params' : maddpg.maddpg_agent[i].critic_optimizer.state_dict()}
save_dict_list.append(save_dict)
torch.save(
save_dict_list,
os.path.join(model_dir, 'episode-{}.pt'.format(episode)))
if average_score >= 3.0:
print('\nEnvironment solved in {} episodes!'.format(episode -
100))
print('\nAverage Score: {:.2f}'.format(average_score))
break
env.close()
logger.close()
timer.finish()
class UnityEnvHelper:
# constructor - give file_name of agent environment
def __init__(self, file_name, no_graphics=True, seed=8888):
self.seed = seed
self.uenv = UnityEnvironment(file_name=file_name,
seed=self.seed,
no_graphics=no_graphics)
# pick the first agent as the brain
self.brain_name = self.uenv.brain_names[0]
self.brain = self.uenv.brains[self.brain_name]
# get the action space size
self.action_size = self.brain.vector_action_space_size
# reset the environment , in training mode
self.reset(True)
# get the state space size
self.state_size = len(self.ue_info.vector_observations[0])
def __del__(self):
# make sure we close the environment
try:
self.uenv.close()
del self.uenv
except:
pass
def reset(self, train_mode=True):
# tell the unity agent to restart an episode
# training mode simple seems to run the simulation at full speed
self.ue_info = self.uenv.reset(train_mode=train_mode)[self.brain_name]
# we pass in current state for convenience
def step(self, state, action):
# perform action on environment and get observation
self.ue_info = self.uenv.step(action)[self.brain_name]
# return state , action , next state , reward and done flag
# slightly
return {
'state': state,
'action': action,
'reward': self.reward(),
'next_state': self.state(),
'done': self.done()
}
def state(self):
# just last observation state
return self.ue_info.vector_observations[0]
def reward(self):
# return reward from last observation
return self.ue_info.rewards[0]
def done(self):
# return done flag
return self.ue_info.local_done[0]
state = next_state
score += reward
scores.append(score)
print('\rStep {}\tScore: {}'.format(i, score), end="")
time.sleep(0.25)
if done:
break
# plot the scores of a trained agent
fig = plt.figure()
ax = fig.add_subplot(111)
plt.plot(np.arange(len(scores)), scores)
plt.ylabel('Score')
plt.xlabel('Episode #')
plt.show()
return scores
if __name__ == "__main__":
# set up environment
curr_path = os.getcwd()
my_env = UnityEnvironment(
file_name=os.path.join(curr_path, "Banana_Windows_x86_64/Banana.exe"))
my_agent_gamma = Agent(gamma=0.99, tau=1e-3)
my_scores = ddqnper(agent=my_agent_gamma, env=my_env, n_episodes=2000)
# scores = demonstrate_agent(env=my_env, model_path=os.path.join(curr_path, "checkpoint.pth"))
my_env.close()
per agents to be retrieved at the next step.
- value is an optional input that be used to send a single float per agent
to be displayed if and AgentMonitor.cs component is attached to the agent.
if u have more than one brain, use dict for action per brain
action = {'brain1': [1.0, 2.0], 'brain2': [3.0, 4.0]}
'''
for epi in range(10):
# env.global_done could be used to check all
env_info = env.reset(train_mode=train_mode)[default_brain]
state = env_info.states[0]
done = False
epi_rewards = 0
while not done:
if brain.action_space_type == 'discrete':
action = np.random.randint(
0, brain.action_space_size, size=(len(env_info.agents)))
else:
action = np.random.randn(
len(env_info.agents), brain.action_space_size)
env_info = env.step(action)[default_brain]
state = env_info.states[0]
epi_rewards += env_info.rewards[0]
done = env_info.local_done[0]
print('Total reward for this episode: {}'.format(epi_rewards))
env.close()
print('Environment is closed')
class TrainerController(object):
def __init__(self, env_path, run_id, save_freq, curriculum_file, fast_simulation, load, train,
worker_id, keep_checkpoints, lesson, seed, docker_target_name, trainer_config_path):
"""
:param env_path: Location to the environment executable to be loaded.
:param run_id: The sub-directory name for model and summary statistics
:param save_freq: Frequency at which to save model
:param curriculum_file: Curriculum json file for environment
:param fast_simulation: Whether to run the game at training speed
:param load: Whether to load the model or randomly initialize
:param train: Whether to train model, or only run inference
:param worker_id: Number to add to communication port (5005). Used for multi-environment
:param keep_checkpoints: How many model checkpoints to keep
:param lesson: Start learning from this lesson
:param seed: Random seed used for training.
:param docker_target_name: Name of docker volume that will contain all data.
:param trainer_config_path: Fully qualified path to location of trainer configuration file
"""
self.trainer_config_path = trainer_config_path
env_path = (env_path.strip()
.replace('.app', '')
.replace('.exe', '')
.replace('.x86_64', '')
.replace('.x86', '')) # Strip out executable extensions if passed
# Recognize and use docker volume if one is passed as an argument
if docker_target_name == '':
self.model_path = './models/{run_id}'.format(run_id=run_id)
self.curriculum_file = curriculum_file
self.summaries_dir = './summaries'
else:
self.model_path = '/{docker_target_name}/models/{run_id}'.format(
docker_target_name=docker_target_name,
run_id=run_id)
env_path = '/{docker_target_name}/{env_name}'.format(docker_target_name=docker_target_name,
env_name=env_path)
if curriculum_file is None:
self.curriculum_file = None
else:
self.curriculum_file = '/{docker_target_name}/{curriculum_file}'.format(
docker_target_name=docker_target_name,
curriculum_file=curriculum_file)
self.summaries_dir = '/{docker_target_name}/summaries'.format(docker_target_name=docker_target_name)
self.logger = logging.getLogger("unityagents")
self.run_id = run_id
self.save_freq = save_freq
self.lesson = lesson
self.fast_simulation = fast_simulation
self.load_model = load
self.train_model = train
self.worker_id = worker_id
self.keep_checkpoints = keep_checkpoints
self.trainers = {}
if seed == -1:
seed = np.random.randint(0, 999999)
self.seed = seed
np.random.seed(self.seed)
tf.set_random_seed(self.seed)
self.env = UnityEnvironment(file_name=env_path, worker_id=self.worker_id,
curriculum=self.curriculum_file, seed=self.seed)
self.env_name = os.path.basename(os.path.normpath(env_path)) # Extract out name of environment
def _get_progress(self):
if self.curriculum_file is not None:
progress = 0
if self.env.curriculum.measure_type == "progress":
for brain_name in self.env.external_brain_names:
progress += self.trainers[brain_name].get_step / self.trainers[brain_name].get_max_steps
return progress / len(self.env.external_brain_names)
elif self.env.curriculum.measure_type == "reward":
for brain_name in self.env.external_brain_names:
progress += self.trainers[brain_name].get_last_reward
return progress
else:
return None
else:
return None
def _process_graph(self):
nodes = []
scopes = []
for brain_name in self.trainers.keys():
if self.trainers[brain_name].graph_scope is not None:
scope = self.trainers[brain_name].graph_scope + '/'
if scope == '/':
scope = ''
scopes += [scope]
if self.trainers[brain_name].parameters["trainer"] == "imitation":
nodes += [scope + x for x in ["action"]]
elif not self.trainers[brain_name].parameters["use_recurrent"]:
nodes += [scope + x for x in ["action", "value_estimate", "action_probs"]]
else:
node_list = ["action", "value_estimate", "action_probs", "recurrent_out", "memory_size"]
nodes += [scope + x for x in node_list]
if len(scopes) > 1:
self.logger.info("List of available scopes :")
for scope in scopes:
self.logger.info("\t" + scope)
self.logger.info("List of nodes to export :")
for n in nodes:
self.logger.info("\t" + n)
return nodes
def _save_model(self, sess, saver, steps=0):
"""
Saves current model to checkpoint folder.
:param sess: Current Tensorflow session.
:param steps: Current number of steps in training process.
:param saver: Tensorflow saver for session.
"""
last_checkpoint = self.model_path + '/model-' + str(steps) + '.cptk'
saver.save(sess, last_checkpoint)
tf.train.write_graph(sess.graph_def, self.model_path, 'raw_graph_def.pb', as_text=False)
self.logger.info("Saved Model")
def _export_graph(self):
"""
Exports latest saved model to .bytes format for Unity embedding.
"""
target_nodes = ','.join(self._process_graph())
ckpt = tf.train.get_checkpoint_state(self.model_path)
freeze_graph.freeze_graph(input_graph=self.model_path + '/raw_graph_def.pb',
input_binary=True,
input_checkpoint=ckpt.model_checkpoint_path,
output_node_names=target_nodes,
output_graph=self.model_path + '/' + self.env_name + "_" + self.run_id + '.bytes',
clear_devices=True, initializer_nodes="", input_saver="",
restore_op_name="save/restore_all", filename_tensor_name="save/Const:0")
def _initialize_trainers(self, trainer_config, sess):
self.trainer_parameters_dict = {}
self.trainers = {}
for brain_name in self.env.external_brain_names:
trainer_parameters = trainer_config['default'].copy()
if len(self.env.external_brain_names) > 1:
graph_scope = re.sub('[^0-9a-zA-Z]+', '-', brain_name)
trainer_parameters['graph_scope'] = graph_scope
trainer_parameters['summary_path'] = '{basedir}/{name}'.format(
basedir=self.summaries_dir,
name=str(self.run_id) + '_' + graph_scope)
else:
trainer_parameters['graph_scope'] = ''
trainer_parameters['summary_path'] = '{basedir}/{name}'.format(
basedir=self.summaries_dir,
name=str(self.run_id))
if brain_name in trainer_config:
_brain_key = brain_name
while not isinstance(trainer_config[_brain_key], dict):
_brain_key = trainer_config[_brain_key]
for k in trainer_config[_brain_key]:
trainer_parameters[k] = trainer_config[_brain_key][k]
self.trainer_parameters_dict[brain_name] = trainer_parameters.copy()
for brain_name in self.env.external_brain_names:
if self.trainer_parameters_dict[brain_name]['trainer'] == "imitation":
self.trainers[brain_name] = BehavioralCloningTrainer(sess, self.env, brain_name,
self.trainer_parameters_dict[brain_name],
self.train_model, self.seed)
elif self.trainer_parameters_dict[brain_name]['trainer'] == "ppo":
self.trainers[brain_name] = PPOTrainer(sess, self.env, brain_name, self.trainer_parameters_dict[brain_name],
self.train_model, self.seed)
elif self.trainer_parameters_dict[brain_name]['trainer'] == "dqn":
self.trainers[brain_name] = DQNTrainer(sess, self.env, brain_name, self.trainer_parameters_dict[brain_name],
self.train_model, self.seed)
elif self.trainer_parameters_dict[brain_name]['trainer'] == "madqn":
self.trainers[brain_name] = MADQNTrainer(sess, self.env, brain_name, self.trainer_parameters_dict[brain_name],
self.train_model, self.seed)
elif self.trainer_parameters_dict[brain_name]['trainer'] == "mappo":
self.trainers[brain_name] = MAPPOTrainer(sess, self.env, brain_name, self.trainer_parameters_dict[brain_name],
self.train_model, self.seed)
elif self.trainer_parameters_dict[brain_name]['trainer'] == "coma":
self.trainers[brain_name] = COMATrainer(sess, self.env, brain_name, self.trainer_parameters_dict[brain_name],
self.train_model, self.seed)
else:
raise UnityEnvironmentException("The trainer config contains an unknown trainer type for brain {}"
.format(brain_name))
all_vars = tf.trainable_variables()
self.brain_vars = {}
total_vars = len(all_vars)
idx1 = 0
idx2 = int(total_vars/len(self.env.external_brain_names))
for brain_name in self.env.external_brain_names:
self.brain_vars[brain_name] = all_vars[idx1:idx2]
idx1 = idx2
idx2 = idx2*total_vars
if (self.trainer_parameters_dict[brain_name]['trainer'] == "dqn" or
self.trainer_parameters_dict[brain_name]['trainer'] == "madqn"):
self.trainers[brain_name].update_target_graph(self.brain_vars[brain_name])
if self.trainer_parameters_dict[brain_name]['trainer'] == "madqn":
if not self.trainers[brain_name].parameters['frozen']:
self.free_brain_vars = self.brain_vars[brain_name]
for brain_name in self.env.external_brain_names:
if self.trainer_parameters_dict[brain_name]['trainer'] == "madqn":
if self.trainers[brain_name].parameters['frozen']:
self.trainers[brain_name].update_frozen_brain_graph(self.brain_vars[brain_name], self.free_brain_vars)
def _load_config(self):
try:
with open(self.trainer_config_path) as data_file:
trainer_config = yaml.load(data_file)
return trainer_config
except IOError:
raise UnityEnvironmentException("""Parameter file could not be found here {}.
Will use default Hyper parameters"""
.format(self.trainer_config_path))
except UnicodeDecodeError:
raise UnityEnvironmentException("There was an error decoding Trainer Config from this path : {}"
.format(self.trainer_config_path))
@staticmethod
def _create_model_path(model_path):
try:
if not os.path.exists(model_path):
os.makedirs(model_path)
except Exception:
raise UnityEnvironmentException("The folder {} containing the generated model could not be accessed."
" Please make sure the permissions are set correctly."
.format(model_path))
def start_learning(self):
self.env.curriculum.set_lesson_number(self.lesson)
trainer_config = self._load_config()
self._create_model_path(self.model_path)
tf.reset_default_graph()
with tf.Session() as sess:
self._initialize_trainers(trainer_config, sess)
for k, t in self.trainers.items():
self.logger.info(t)
init = tf.global_variables_initializer()
saver = tf.train.Saver(max_to_keep=self.keep_checkpoints)
# Instantiate model parameters
if self.load_model:
self.logger.info('Loading Model...')
ckpt = tf.train.get_checkpoint_state(self.model_path)
if ckpt is None:
self.logger.info('The model {0} could not be found. Make sure you specified the right '
'--run-id'.format(self.model_path))
saver.restore(sess, ckpt.model_checkpoint_path)
else:
sess.run(init)
global_step = 0 # This is only for saving the model
self.env.curriculum.increment_lesson(self._get_progress())
curr_info = self.env.reset(train_mode=self.fast_simulation)
if self.train_model:
for brain_name, trainer in self.trainers.items():
trainer.write_tensorboard_text('Hyperparameters', trainer.parameters)
try:
while any([t.get_step <= t.get_max_steps for k, t in self.trainers.items()]) or not self.train_model:
if self.env.global_done:
#self.env.curriculum.increment_lesson(self._get_progress())
curr_info = self.env.reset(train_mode=self.fast_simulation)
for brain_name, trainer in self.trainers.items():
trainer.end_episode()
# Decide and take an action
take_action_vector, take_action_memories, take_action_text, take_action_outputs = {}, {}, {}, {}
for brain_name, trainer in self.trainers.items():
(take_action_vector[brain_name],
take_action_memories[brain_name],
take_action_text[brain_name],
take_action_outputs[brain_name]) = trainer.take_action(curr_info)
new_info = self.env.step(vector_action=take_action_vector, memory=take_action_memories,
text_action=take_action_text)
for brain_name, trainer in self.trainers.items():
if self.trainer_parameters_dict[brain_name]['trainer'] == "mappo":
trainer.add_experiences(curr_info, new_info, take_action_outputs[brain_name], take_action_vector)
else:
trainer.add_experiences(curr_info, new_info, take_action_outputs[brain_name])
curr_info = new_info
for brain_name, trainer in self.trainers.items():
if self.trainer_parameters_dict[brain_name]['trainer'] == "mappo":
take_action_vector[brain_name] = trainer.simulate_action(curr_info)
for brain_name, trainer in self.trainers.items():
if self.trainer_parameters_dict[brain_name]['trainer'] == "mappo":
trainer.process_experiences(curr_info, take_action_vector)
else:
trainer.process_experiences(curr_info)
step = trainer.get_step
max_steps = trainer.get_max_steps
if trainer.is_ready_update() and self.train_model and step <= max_steps:
# Perform gradient descent with experience buffer
trainer.update_model()
# Write training statistics to tensorboard.
trainer.write_summary(self.env.curriculum.lesson_number)
if self.train_model and step <= max_steps:
trainer.increment_step()
trainer.update_last_reward()
if self.train_model and step <= max_steps:
global_step += 1
if global_step % self.save_freq == 0 and global_step != 0 and self.train_model:
# Save Tensorflow model
self._save_model(sess, steps=global_step, saver=saver)
# Final save Tensorflow model
if global_step != 0 and self.train_model:
self._save_model(sess, steps=global_step, saver=saver)
except KeyboardInterrupt:
if self.train_model:
self.logger.info("Learning was interrupted. Please wait while the graph is generated.")
self._save_model(sess, steps=global_step, saver=saver)
pass
self.env.close()
if self.train_model:
self._export_graph()
def main():
env = UnityEnvironment(file_name="./Tennis_Linux/Tennis.x86_64")
print_env_info(env)
random_play(env)
env.close()
def main(args):
if args.deterministic:
set_seed(42)
env = UnityEnvironment(file_name=args.env_path,
no_graphics=args.no_graphics)
# get the default brain
brain_name = env.brain_names[0]
brain = env.brains[brain_name]
env_info = env.reset(train_mode=True)[brain_name]
# number of agents in the environment
print('Number of agents:', len(env_info.agents))
# number of actions
action_size = brain.vector_action_space_size
print('Number of actions:', action_size)
# examine the state space
state = env_info.vector_observations[0]
print('States look like:', state)
state_size = len(state)
print('States have length:', state_size)
agent = Agent(state_size,
action_size,
train=True,
device=args.device,
buffer_size=args.buffer_size,
batch_size=args.batch_size,
lr=args.lr,
gamma=args.gamma,
tau=args.tau,
update_freq=args.update_freq,
nb_updates=args.nb_updates,
noise_mean=args.noise_mean,
noise_theta=args.noise_theta,
noise_sigma=args.noise_sigma,
eps=args.eps,
eps_decay=args.eps_decay,
grad_clip=args.grad_clip)
scores = train_agent(agent, env, n_episodes=args.episodes)
output_folder = Path(args.output)
if not output_folder.is_dir():
output_folder.mkdir(parents=True)
# Save model
torch.save(agent.actor_local.state_dict(),
output_folder.joinpath('actor_model.pt'))
torch.save(agent.critic_local.state_dict(),
output_folder.joinpath('critic_model.pt'))
env.close()
# Plot results
fig = plt.figure()
plot_scores(scores,
running_window_size=100,
success_thresh=args.success_threshold)
fig.savefig(output_folder.joinpath('training_scores.png'),
transparent=True)
class UnityEnv(gym.Env):
def __init__(self, app_name=None, idx=0):
# parameter
app_path = os.path.join(os.path.dirname(__file__), 'assets', app_name)
idx = idx
no_graphics = False
self.num_envs = 1
# create environment
self._env = UnityEnvironment(file_name=app_path,
worker_id=idx,
no_graphics=no_graphics)
self.name = app_name
# Only Accept Environment with Only One Brain
assert len(self._env.brains) == 1
self.brain_name = self._env.external_brain_names[0]
self.brain = self._env.brains[self.brain_name]
# viusalization
self.use_visual = (self.brain.number_visual_observations == 1)
# action space dimension
if self.brain.vector_action_space_type == "discrete":
self._a_dim = Discrete(1)
else:
high = np.array([np.inf] * (self.brain.vector_action_space_size))
self._a_dim = Box(-high, high)
# observation spce dimension
if self.use_visual and False and no_graphic:
high = np.array([np.inf] *
self.brain.camera_resolutions[0]["height"] *
self.brain.camera_resolutions[0]["width"] * 3)
self._ob_dim = Box(-high, high)
else:
high = np.array([np.inf] *
self.brain.vector_observation_space_size)
self._ob_dim = Box(-high, high)
# video buffer
self.frames = []
def reset(self):
self.frames = []
info = self._env.reset()[self.brain_name]
state = info.vector_observations[0]
return np.array([state])
def step(self, action):
info = self._env.step([action])[self.brain_name]
state = info.vector_observations[0]
reward = info.rewards[0]
done = info.local_done[0]
self._collect_frames(info.visual_observations[0])
return np.array([state]), np.array([reward
]), np.array([done
]), np.array([None])
def close(self):
self._env.close()
def _collect_frames(self, frame):
if self.use_visual:
self.frames.append(frame)
@property
def action_space(self):
return self._a_dim
@property
def observation_space(self):
return self._ob_dim
class TrainerController(object):
def __init__(self, env_path, run_id, save_freq, curriculum_file, fast_simulation, load, train,
worker_id, keep_checkpoints, lesson, seed, docker_target_name, trainer_config_path,
no_graphics):
"""
:param env_path: Location to the environment executable to be loaded.
:param run_id: The sub-directory name for model and summary statistics
:param save_freq: Frequency at which to save model
:param curriculum_file: Curriculum json file for environment
:param fast_simulation: Whether to run the game at training speed
:param load: Whether to load the model or randomly initialize
:param train: Whether to train model, or only run inference
:param worker_id: Number to add to communication port (5005). Used for multi-environment
:param keep_checkpoints: How many model checkpoints to keep
:param lesson: Start learning from this lesson
:param seed: Random seed used for training.
:param docker_target_name: Name of docker volume that will contain all data.
:param trainer_config_path: Fully qualified path to location of trainer configuration file
:param no_graphics: Whether to run the Unity simulator in no-graphics mode
"""
self.trainer_config_path = trainer_config_path
if env_path is not None:
env_path = (env_path.strip()
.replace('.app', '')
.replace('.exe', '')
.replace('.x86_64', '')
.replace('.x86', '')) # Strip out executable extensions if passed
# Recognize and use docker volume if one is passed as an argument
if docker_target_name == '':
self.docker_training = False
self.model_path = './models/{run_id}'.format(run_id=run_id)
self.curriculum_file = curriculum_file
self.summaries_dir = './summaries'
else:
self.docker_training = True
self.model_path = '/{docker_target_name}/models/{run_id}'.format(
docker_target_name=docker_target_name,
run_id=run_id)
if env_path is not None:
env_path = '/{docker_target_name}/{env_name}'.format(docker_target_name=docker_target_name,
env_name=env_path)
if curriculum_file is None:
self.curriculum_file = None
else:
self.curriculum_file = '/{docker_target_name}/{curriculum_file}'.format(
docker_target_name=docker_target_name,
curriculum_file=curriculum_file)
self.summaries_dir = '/{docker_target_name}/summaries'.format(docker_target_name=docker_target_name)
self.logger = logging.getLogger("unityagents")
self.run_id = run_id
self.save_freq = save_freq
self.lesson = lesson
self.fast_simulation = fast_simulation
self.load_model = load
self.train_model = train
self.worker_id = worker_id
self.keep_checkpoints = keep_checkpoints
self.trainers = {}
if seed == -1:
seed = np.random.randint(0, 999999)
self.seed = seed
np.random.seed(self.seed)
tf.set_random_seed(self.seed)
self.env = UnityEnvironment(file_name=env_path, worker_id=self.worker_id,
curriculum=self.curriculum_file, seed=self.seed,
docker_training=self.docker_training,
no_graphics=no_graphics)
if env_path is None:
self.env_name = 'editor_'+self.env.academy_name
else:
self.env_name = os.path.basename(os.path.normpath(env_path)) # Extract out name of environment
def _get_progress(self):
if self.curriculum_file is not None:
progress = 0
if self.env.curriculum.measure_type == "progress":
for brain_name in self.env.external_brain_names:
progress += self.trainers[brain_name].get_step / self.trainers[brain_name].get_max_steps
return progress / len(self.env.external_brain_names)
elif self.env.curriculum.measure_type == "reward":
for brain_name in self.env.external_brain_names:
progress += self.trainers[brain_name].get_last_reward
return progress
else:
return None
else:
return None
def _process_graph(self):
nodes = []
scopes = []
for brain_name in self.trainers.keys():
if self.trainers[brain_name].graph_scope is not None:
scope = self.trainers[brain_name].graph_scope + '/'
if scope == '/':
scope = ''
scopes += [scope]
if self.trainers[brain_name].parameters["trainer"] == "imitation":
nodes += [scope + x for x in ["action"]]
else:
nodes += [scope + x for x in ["action", "value_estimate", "action_probs"]]
if self.trainers[brain_name].parameters["use_recurrent"]:
nodes += [scope + x for x in ["recurrent_out", "memory_size"]]
if len(scopes) > 1:
self.logger.info("List of available scopes :")
for scope in scopes:
self.logger.info("\t" + scope)
self.logger.info("List of nodes to export :")
for n in nodes:
self.logger.info("\t" + n)
return nodes
def _save_model(self, sess, saver, steps=0):
"""
Saves current model to checkpoint folder.
:param sess: Current Tensorflow session.
:param steps: Current number of steps in training process.
:param saver: Tensorflow saver for session.
"""
last_checkpoint = self.model_path + '/model-' + str(steps) + '.cptk'
saver.save(sess, last_checkpoint)
tf.train.write_graph(sess.graph_def, self.model_path, 'raw_graph_def.pb', as_text=False)
self.logger.info("Saved Model")
def _export_graph(self):
"""
Exports latest saved model to .bytes format for Unity embedding.
"""
target_nodes = ','.join(self._process_graph())
ckpt = tf.train.get_checkpoint_state(self.model_path)
freeze_graph.freeze_graph(input_graph=self.model_path + '/raw_graph_def.pb',
input_binary=True,
input_checkpoint=ckpt.model_checkpoint_path,
output_node_names=target_nodes,
output_graph=self.model_path + '/' + self.env_name + "_" + self.run_id + '.bytes',
clear_devices=True, initializer_nodes="", input_saver="",
restore_op_name="save/restore_all", filename_tensor_name="save/Const:0")
def _initialize_trainers(self, trainer_config, sess):
trainer_parameters_dict = {}
self.trainers = {}
for brain_name in self.env.external_brain_names:
trainer_parameters = trainer_config['default'].copy()
if len(self.env.external_brain_names) > 1:
graph_scope = re.sub('[^0-9a-zA-Z]+', '-', brain_name)
trainer_parameters['graph_scope'] = graph_scope
trainer_parameters['summary_path'] = '{basedir}/{name}'.format(
basedir=self.summaries_dir,
name=str(self.run_id) + '_' + graph_scope)
else:
trainer_parameters['graph_scope'] = ''
trainer_parameters['summary_path'] = '{basedir}/{name}'.format(
basedir=self.summaries_dir,
name=str(self.run_id))
if brain_name in trainer_config:
_brain_key = brain_name
while not isinstance(trainer_config[_brain_key], dict):
_brain_key = trainer_config[_brain_key]
for k in trainer_config[_brain_key]:
trainer_parameters[k] = trainer_config[_brain_key][k]
trainer_parameters_dict[brain_name] = trainer_parameters.copy()
for brain_name in self.env.external_brain_names:
if trainer_parameters_dict[brain_name]['trainer'] == "imitation":
self.trainers[brain_name] = BehavioralCloningTrainer(sess, self.env, brain_name,
trainer_parameters_dict[brain_name],
self.train_model, self.seed)
elif trainer_parameters_dict[brain_name]['trainer'] == "ppo":
self.trainers[brain_name] = PPOTrainer(sess, self.env, brain_name, trainer_parameters_dict[brain_name],
self.train_model, self.seed)
else:
raise UnityEnvironmentException("The trainer config contains an unknown trainer type for brain {}"
.format(brain_name))
def _load_config(self):
try:
with open(self.trainer_config_path) as data_file:
trainer_config = yaml.load(data_file)
return trainer_config
except IOError:
raise UnityEnvironmentException("""Parameter file could not be found here {}.
Will use default Hyper parameters"""
.format(self.trainer_config_path))
except UnicodeDecodeError:
raise UnityEnvironmentException("There was an error decoding Trainer Config from this path : {}"
.format(self.trainer_config_path))
@staticmethod
def _create_model_path(model_path):
try:
if not os.path.exists(model_path):
os.makedirs(model_path)
except Exception:
raise UnityEnvironmentException("The folder {} containing the generated model could not be accessed."
" Please make sure the permissions are set correctly."
.format(model_path))
def start_learning(self):
self.env.curriculum.set_lesson_number(self.lesson)
trainer_config = self._load_config()
self._create_model_path(self.model_path)
tf.reset_default_graph()
with tf.Session() as sess:
self._initialize_trainers(trainer_config, sess)
for k, t in self.trainers.items():
self.logger.info(t)
init = tf.global_variables_initializer()
saver = tf.train.Saver(max_to_keep=self.keep_checkpoints)
# Instantiate model parameters
if self.load_model:
self.logger.info('Loading Model...')
ckpt = tf.train.get_checkpoint_state(self.model_path)
if ckpt is None:
self.logger.info('The model {0} could not be found. Make sure you specified the right '
'--run-id'.format(self.model_path))
saver.restore(sess, ckpt.model_checkpoint_path)
else:
sess.run(init)
global_step = 0 # This is only for saving the model
self.env.curriculum.increment_lesson(self._get_progress())
curr_info = self.env.reset(train_mode=self.fast_simulation)
if self.train_model:
for brain_name, trainer in self.trainers.items():
trainer.write_tensorboard_text('Hyperparameters', trainer.parameters)
try:
while any([t.get_step <= t.get_max_steps for k, t in self.trainers.items()]) or not self.train_model:
if self.env.global_done:
self.env.curriculum.increment_lesson(self._get_progress())
curr_info = self.env.reset(train_mode=self.fast_simulation)
for brain_name, trainer in self.trainers.items():
trainer.end_episode()
# Decide and take an action
take_action_vector, take_action_memories, take_action_text, take_action_outputs = {}, {}, {}, {}
for brain_name, trainer in self.trainers.items():
(take_action_vector[brain_name],
take_action_memories[brain_name],
take_action_text[brain_name],
take_action_outputs[brain_name]) = trainer.take_action(curr_info)
new_info = self.env.step(vector_action=take_action_vector, memory=take_action_memories,
text_action=take_action_text)
for brain_name, trainer in self.trainers.items():
trainer.add_experiences(curr_info, new_info, take_action_outputs[brain_name])
trainer.process_experiences(curr_info, new_info)
if trainer.is_ready_update() and self.train_model and trainer.get_step <= trainer.get_max_steps:
# Perform gradient descent with experience buffer
trainer.update_model()
# Write training statistics to Tensorboard.
trainer.write_summary(self.env.curriculum.lesson_number)
if self.train_model and trainer.get_step <= trainer.get_max_steps:
trainer.increment_step_and_update_last_reward()
if self.train_model:
global_step += 1
if global_step % self.save_freq == 0 and global_step != 0 and self.train_model:
# Save Tensorflow model
self._save_model(sess, steps=global_step, saver=saver)
curr_info = new_info
# Final save Tensorflow model
if global_step != 0 and self.train_model:
self._save_model(sess, steps=global_step, saver=saver)
except KeyboardInterrupt:
print('--------------------------Now saving model-------------------------')
if self.train_model:
self.logger.info("Learning was interrupted. Please wait while the graph is generated.")
self._save_model(sess, steps=global_step, saver=saver)
pass
self.env.close()
if self.train_model:
self._export_graph()
time.sleep(0.01)
if np.any(dones): # exit loop if episode finished
break
scores_window.append(score) # save most recent score
scores.append(np.mean(score)) # save most recent score
# plot the scores
fig = plt.figure()
ax = fig.add_subplot(111)
plt.plot(np.arange(len(scores)), scores)
plt.ylabel('Score')
plt.xlabel('Episode #')
#plt.show()
plt.savefig('testRes.png')
print('Final Score: ==> ' + np.mean(scores))
env.close()
''' # random
for i in range(5): # play game for 5 episodes
env_info = env.reset(train_mode=False)[brain_name] # reset the environment
states = env_info.vector_observations # get the current state (for each agent)
scores = np.zeros(num_agents) # initialize the score (for each agent)
while True:
actions = np.random.randn(num_agents, action_size) # select an action (for each agent)
actions = np.clip(actions, -1, 1) # all actions between -1 and 1
env_info = env.step(actions)[brain_name] # send all actions to tne environment
next_states = env_info.vector_observations # get next state (for each agent)
rewards = env_info.rewards # get reward (for each agent)
dones = env_info.local_done # see if episode finished
scores += env_info.rewards # update the score (for each agent)
states = next_states # roll over states to next time step
if np.any(dones): # exit loop if episode finished