def init_updaters_(self):
self.target_v = GreedyStateValueFunction(self.target_q)
target_esitmator = OptimalityTighteningEstimator(self.target_v, self._upper_weight, self._lower_weight,
discount_factor=self._discount_factor)
self.network_optimizer.add_updater(TrajectoryFitQ(self.learn_q, target_esitmator), name="ot")
self.network_optimizer.add_updater(network.L2(self.network), name="l2")
self.network_optimizer.add_updater(EnvModelUpdater(
self.network.sub_net("se"),
self.network.sub_net("transition"),
self.network.sub_net("decoder"),
state_shape=self._state_shape,
dim_action=self._num_actions,
# curriculum=[1, self._rollout_depth],
# skip_step=[10000],
# transition_weight=1.0, with_momentum=True
curriculum=self._curriculum,
skip_step=self._skip_step,
transition_weight=1.0,
with_momentum=self._with_momentum,
save_image_interval=self._save_image_interval,
with_ob=self._with_ob,
with_goal=self._with_goal
), name="env")
self.network_optimizer.compile()
def init_updaters_(self):
if self._ddqn:
estimator = target_estimate.DDQNOneStepTD(self.learn_q, self.target_q, self._discount_factor)
else:
estimator = target_estimate.OneStepTD(self.target_q, self._discount_factor)
self.network_optimizer.add_updater(network.FitTargetQ(self.learn_q, estimator), name="td")
self.network_optimizer.add_updater(network.L2(self.network), name="l2")
self.network_optimizer.compile()
pass
def init_updaters_(self):
target_estimator = target_estimate.ContinuousActionEstimator(
self._target_v_function, self._discount_factor)
self.network_optimizer.add_updater(
DPGUpdater(actor=self._actor_function,
critic=self._q_function,
target_estimator=target_estimator,
discount_factor=self._discount_factor, actor_weight=0.1), name="ac")
self.network_optimizer.add_updater(network.L2(self.network), name="l2")
self.network_optimizer.compile()
def init_updaters_(self):
if self._ddqn:
self.target_v = DoubleQValueFunction(self.learn_q, self.target_q)
else:
self.target_v = GreedyStateValueFunction(self.target_q)
target_esitmator = OptimalityTighteningEstimator(self.target_v, self._upper_weight, self._lower_weight,
discount_factor=self._discount_factor)
self.network_optimizer.add_updater(TrajectoryFitQ(self.learn_q, target_esitmator), name="ot")
self.network_optimizer.add_updater(network.L2(self.network), name="l2")
self.network_optimizer.compile()
def init_updaters_(self):
target_esitmator = OptimalityTighteningEstimator(
self._target_v_function,
self._upper_weight,
self._lower_weight,
discount_factor=self._discount_factor)
self.network_optimizer.add_updater(TrajectoryFitQ(
self._actor_function, self._q_function, target_esitmator,
self._discount_factor, 0.02),
name="ac")
self.network_optimizer.add_updater(network.L2(self.network), name="l2")
self.network_optimizer.compile()
def init_updaters_(self):
self.network_optimizer.add_updater(network.L2(self.network), name="l2")
self.network_optimizer.add_updater(
EnvModelUpdater(
self.network.sub_net("se"),
self.network.sub_net("transition"),
self.network.sub_net("decoder"),
state_shape=self._state_shape,
dim_action=self._num_actions,
# curriculum=[1, self._rollout_depth],
# skip_step=[10000],
# transition_weight=1.0, with_momentum=True
curriculum=self._curriculum,
skip_step=self._skip_step,
transition_weight=1.0,
with_momentum=self._with_momentum,
save_image_interval=self._save_image_interval,
with_ob=self._with_ob,
with_goal=self._with_goal),
name="env")
self.network_optimizer.compile()
def __init__(
self,
num_action,
f_se,
f_ac,
f_tran,
f_decoder,
f_rollout,
f_encoder,
state_shape,
# ACUpdate arguments
discount_factor,
entropy=1e-3,
target_estimator=None,
max_advantage=10.0,
# optimizer arguments
network_optimizer=None,
max_gradient=10.0,
# sampler arguments
sampler=None,
policy_with_iaa=False,
compute_with_diff=False,
with_momentum=True,
rollout_depth=3,
rollout_lane=3,
dynamic_rollout=None,
dynamic_skip_step=None,
model_train_depth=3,
batch_size=32,
save_image_interval=1000,
log_dir="./log/img",
with_ob=False,
with_goal=True,
*args,
**kwargs):
"""
:param f_create_net: function: f_create_net(inputs) => {"pi": dist_pi, "q": q_values},
in which {inputs} is [input_state],
{dist_pi} is probability distribution of policy with shape [None, num_actions],
{q_values} is Q values with shape [None, num_actions];
or f_create_net(inputs) => {"mean": mean, "stddev": stddev, "v": v},
in which {mean} {stddev} is mean and stddev if normal distribution for continuous actions,
{v} is state value.
:param state_shape:
:param discount_factor:
:param entropy: entropy regulator weight.
:param target_estimator: optional, default to target_estimate.NStepTD
:type target_estimator.TargetEstimator
:param max_advantage: advantage regulation: max advantage value in policy gradient step
:param network_optimizer: optional, default to network.LocalNetworkOptimizer
:type network_optimizer: network.NetworkOptimizer
:param max_gradient: optional, max_gradient clip value
:param sampler: optional, default to sampling.TrajectoryOnSampler.
if None, a TrajectoryOnSampler will be created using batch_size.
:type sampler: sampling.Sampler
:param batch_size: optional, batch_size when creating sampler
:param max_rollout: optional, should be an odd number
:param args:
:param kwargs:
"""
self.processed_state_shape = []
def f_iaa(inputs):
input_observation = inputs[0]
if compute_with_diff:
logging.warning("use diff 2333")
diff_ob = []
for i in range(input_observation.shape[-1] / 3 - 1):
diff_ob.append(input_observation[:, :, :, (i + 1) *
3:(i + 1) * 3 + 3] -
input_observation[:, :, :, i * 3:i * 3 + 3])
net_se = network.Network([tf.concat(diff_ob[:], axis=3)],
f_se,
var_scope="se_1")
self.processed_state_shape = copy.copy(state_shape)
self.processed_state_shape[-1] = state_shape[-1] - 3
else:
net_se = network.Network([input_observation],
f_se,
var_scope="se_1")
self.processed_state_shape = state_shape
input_action = inputs[1]
action_dim = inputs[2]
input_action = tf.one_hot(indices=input_action,
depth=action_dim,
on_value=1.0,
off_value=0.0,
axis=-1)
se = net_se["se"].op
input_reward = tf.placeholder(dtype=tf.float32,
shape=[None, 1],
name="input_reward")
encode_state = tf.placeholder(dtype=tf.float32,
shape=[None,
se.shape.as_list()[-1]],
name="encode_states")
input_frame = tf.placeholder(
dtype=tf.float32,
shape=[None, state_shape[0], state_shape[1], 3],
name="input_frame")
rollout = network.Network([se],
f_rollout,
var_scope="rollout_policy")
if not with_ob:
net_model = network.Network([se, input_action],
f_tran,
var_scope="TranModel")
net_decoder = network.Network([
tf.concat(
(encode_state, encode_state), axis=-1), input_frame
],
f_decoder,
var_scope="Decoder")
else:
net_model = network.Network([input_observation, input_action],
f_tran,
var_scope="TranModelOB")
net_decoder = network.Network([input_frame],
f_decoder,
var_scope="DecoderOB")
rollout_encoder = network.Network(
[tf.concat((se, se), axis=-1), input_reward],
f_encoder,
var_scope="rollout_encoder")
current_state = se
current_ob = input_observation
for i in range(rollout_lane):
for j in range(rollout_depth):
current_rollout = rollout([current_state],
name_scope="rollout_%d_%d" %
(i, j))
# rollout_action_dist = tf.contrib.distributions.Categorical(rollout_action_function.output().op)
# current_action = rollout_action_dist.sample()
if not with_ob:
tran_model = net_model([
current_state, current_rollout["rollout_action"].op
],
name_scope="env_model_%d_%d" %
(i, j))
else:
tran_model = net_model(
[current_ob, current_rollout["rollout_action"].op],
name_scope="env_model_%d_%d" % (i, j))
next_goal = tran_model["next_state"].op
reward = tran_model["reward"].op
if not with_ob:
current_state += next_goal
else:
current_ob = tf.concat(
[current_ob[:, :, :, 3:], next_goal], axis=-1)
next_goal = tf.stop_gradient(
net_se([current_ob])["se"].op)
if j == 0:
encode_states = next_goal
rollout_reward = reward
else:
encode_states = tf.concat([next_goal, encode_states],
axis=-1)
rollout_reward = tf.concat([rollout_reward, reward],
axis=0)
current_state = se
current_ob = input_observation
input_reward = tf.reshape(rollout_reward, [-1, rollout_depth])
input_reward = tf.split(input_reward, rollout_depth, axis=1)
encode_state = tf.split(encode_states, rollout_depth, axis=1)
for m in range(rollout_depth):
if m == 0:
rollout_encoder = rollout_encoder(
[
tf.concat([
encode_state[-(m + 1)],
encode_state[-(m + 1)]
],
axis=-1), input_reward[-(m + 1)]
],
name_scope="rollout_encoder_%d_%d" % (i, m))
re = rollout_encoder["re"].op
else:
rollout_encoder = rollout_encoder(
[
tf.concat([re, encode_state[-(m + 1)]],
axis=-1), input_reward[-(m + 1)]
],
name_scope="rollout_encoder_%d_%d" % (i, m))
re = rollout_encoder["re"].op
if i == 0:
path = re
else:
path = tf.concat([path, re], axis=1)
if policy_with_iaa:
feature = tf.concat([path, se], axis=1)
else:
feature = se
ac = network.Network([feature], f_ac, var_scope='ac')
v = ac["v"].op
pi_dist = ac["pi"].op
return {"v": v, "pi": pi_dist, "rollout_action": None}, \
{
"se": net_se, "transition": net_model,
"state_decoder": net_decoder
}
self._log_dir = log_dir
self._rollout_depth = rollout_depth
if dynamic_rollout is None:
self._dynamic_rollout = [1, 3, 5]
self._dynamic_skip_step = [5000, 15000]
else:
self._dynamic_rollout = dynamic_rollout
self._dynamic_skip_step = dynamic_skip_step
kwargs.update({
"f_iaa": f_iaa,
"state_shape": state_shape,
"num_action": num_action,
"discount_factor": discount_factor,
"entropy": entropy,
"target_estimator": target_estimator,
"max_advantage": max_advantage,
"max_gradient": max_gradient,
"batch_size": batch_size,
})
logging.warning(network_optimizer)
if network_optimizer is None:
network_optimizer = network.LocalOptimizer(grad_clip=max_gradient)
if sampler is None:
sampler = sampling.TrajectoryOnSampler(interval=batch_size)
kwargs.update({"sampler": sampler})
super(ActorCriticWithI2A, self).__init__(*args, **kwargs)
pi = self.network["pi"]
if pi is not None:
# discrete action: pi is categorical probability distribution
self._pi_function = network.NetworkFunction(self.network["pi"])
self._input_action = tf.placeholder(dtype=tf.uint8,
shape=[None],
name="input_action")
self._pi_distribution = distribution.DiscreteDistribution(
self._pi_function, self._input_action)
q = self.network["q"]
if q is not None:
# network outputs q
self._q_function = network.NetworkFunction(q)
self._v_function = GreedyStateValueFunction(self._q_function)
else:
# network output v
self._v_function = network.NetworkFunction(self.network["v"])
else:
# continuous action: mean / stddev represents normal distribution
dim_action = self.network["mean"].op.shape.as_list()[-1]
self._input_action = tf.placeholder(dtype=tf.float32,
shape=[None, dim_action],
name="input_action")
self._pi_function = network.NetworkFunction(
outputs={
"mean": self.network["mean"],
"stddev": self.network["stddev"]
},
inputs=self.network.inputs)
self._pi_distribution = distribution.NormalDistribution(
self._pi_function, self._input_action)
self._v_function = network.NetworkFunction(self.network["v"])
# continuous action: mean / stddev for normal distribution
# self._rollout_action = network.NetworkFunction(self.network["rollout_action"])
# self._rollout_dist = distribution.DiscreteDistribution(self._rollout_action, self._input_action)
if target_estimator is None:
target_estimator = target_estimate.NStepTD(self._v_function,
discount_factor)
# target_estimator = target_estimate.GAENStep(self._v_function, discount_factor)
self.network_optimizer = network_optimizer
network_optimizer.add_updater(ActorCriticUpdater(
policy_dist=self._pi_distribution,
v_function=self._v_function,
target_estimator=target_estimator,
entropy=entropy),
name="ac")
network_optimizer.add_updater(network.L2(self.network), name="l2")
# network_optimizer.add_updater(
# PolicyNetUpdater(rollout_dist=self._rollout_dist,
# rollout_action_function=self._rollout_action,
# pi_function=self._pi_function),
# name="policy_net"
# )
network_optimizer.add_updater(EnvModelUpdater(
net_se=self.network.sub_net("se"),
net_transition=self.network.sub_net("transition"),
net_decoder=self.network.sub_net("state_decoder"),
curriculum=self._dynamic_rollout,
skip_step=self._dynamic_skip_step,
state_shape=state_shape,
dim_action=num_action,
transition_weight=1.0,
with_momentum=with_momentum,
compute_with_diff=compute_with_diff,
save_image_interval=save_image_interval,
with_ob=with_ob,
with_goal=with_goal),
name="env_model")
# network_optimizer.freeze(self.network.sub_net("transition").variables)
network_optimizer.compile()
self._policy = StochasticPolicy(self._pi_distribution)
def __init__(
self,
f_se,
f_actor,
f_critic,
f_noise,
state_shape,
dim_action,
dim_noise,
# ACUpdate arguments
discount_factor,
# optimizer arguments
network_optimizer=None,
max_gradient=10.0,
# policy arguments
ou_params=(0.0, 0.2, 0.2),
noise_stddev=0.5,
noise_weight=1.0,
noise_mean_weight=1e-2,
noise_stddev_weight=1e-4,
# target network sync arguments
target_sync_interval=10,
target_sync_rate=0.01,
# sampler arguments
replay_size=1000,
batch_size=32,
disentangle_with_dpg=True,
*args,
**kwargs):
"""
:param f_create_net: function, f_create_net([state, action]) => {"q": op_q, "action": op_action}
:param state_shape: state shape
:param dim_action: action dimension
:param discount_factor:
:param target_estimator: default to target_estimate.ContinuousActionEstimator
:type target_estimator: target_estimate.TargetEstimator
:param network_optimizer: default to network.LocalOptimizer
:type network_optimizer: network.NetworkOptimizer
:param max_gradient:
:param ou_params: (mu, theta, sigma) of OU noise arguments
:param target_sync_interval:
:param target_sync_rate:
:param sampler: default to sampling.TransitionSampler
:type sampler: sampling.Sampler
:param batch_size:
:param args:
:param kwargs:
"""
kwargs.update({
"f_se": f_se,
"f_actor": f_actor,
"f_critic": f_critic,
"f_noise": f_noise,
"state_shape": state_shape,
"dim_action": dim_action,
"dim_noise": dim_noise,
"discount_factor": discount_factor,
"max_gradient": max_gradient,
"batch_size": batch_size,
"replay_size": replay_size,
"ou_params": ou_params,
"noise_stddev": noise_stddev,
"noise_weight": noise_weight
})
if network_optimizer is None:
network_optimizer = network.LocalOptimizer(grad_clip=max_gradient)
super(NoisyDPG, self).__init__(*args, **kwargs)
self._disentangle_with_dpg = disentangle_with_dpg
def make_sample(state, action, reward, next_state, episode_done, noise,
**kwargs):
sample = sampling.default_make_sample(state, action, reward,
next_state, episode_done)
sample.update({"noise": noise})
return sample
self._sampler = sampling.TransitionSampler(
hrl.playback.MapPlayback(replay_size),
batch_size,
4,
sample_maker=make_sample)
self._q_function = network.NetworkFunction(
self.network["q"], inputs=[self._input_state, self._input_action])
self._actor_function = network.NetworkFunction(
self.network["action"],
inputs=[self._input_state, self._input_noise])
self._actor_mean_function = network.NetworkFunction(
self.network["action_mean"], inputs=[self._input_state])
self._noise_function = network.NetworkFunction(
self.network["action_noise"],
inputs=[self._input_state, self._input_noise])
self._target_q_function = network.NetworkFunction(
self.network.target["q"],
inputs=[self._input_state, self._input_action])
self._target_actor_function = network.NetworkFunction(
self.network.target["action"],
inputs=[self._input_state, self._input_noise])
target_estimator = NoisyContinuousActionEstimator(
self._target_actor_function, self._target_q_function,
discount_factor)
self.network_optimizer = network_optimizer
if disentangle_with_dpg:
network_optimizer.add_updater(DisentangleNoisyDPGUpdater(
actor=self._actor_function,
critic=self._q_function,
f_noise=self._noise_function,
target_estimator=target_estimator,
discount_factor=discount_factor,
actor_weight=0.02,
actor_mean=self._actor_mean_function,
zero_mean_weight=noise_mean_weight,
stddev_weight=noise_stddev_weight),
name="ac")
else:
network_optimizer.add_updater(NoisyDPGUpdater(
actor=self._actor_function,
critic=self._q_function,
target_estimator=target_estimator,
discount_factor=discount_factor,
actor_weight=0.02,
actor_mean=self._actor_mean_function),
name="ac")
network_optimizer.add_updater(DisentangleUpdater(
self.network.sub_net("se"),
self.network.sub_net("noise"),
stddev=noise_stddev),
weight=noise_weight,
name="disentangle")
network_optimizer.add_updater(network.L2(self.network), name="l2")
network_optimizer.compile()
self._act_all_function = network.NetworkFunction(
{
"action": self.network["action"],
"mean": self.network["action_mean"],
"noise": self.network["action_noise"]
},
inputs=[self._input_state, self._input_noise])
self._noise_source = OUNoise([dim_noise], *ou_params)
self._last_input_noise = None
# self._policy = OUExplorationPolicy(self._actor_function, *ou_params)
self._target_sync_interval = target_sync_interval
self._target_sync_rate = target_sync_rate
self._update_count = 0
def __init__(
self,
env,
f_se,
f_ac,
f_forward,
f_inverse,
state_shape,
# ACUpdate arguments
discount_factor,
entropy=1e-3,
target_estimator=None,
max_advantage=10.0,
# optimizer arguments
network_optimizer=None,
max_gradient=10.0,
# sampler arguments
sampler=None,
batch_size=32,
*args,
**kwargs):
"""
:param f_create_net: function: f_create_net(inputs) => {"pi": dist_pi, "q": q_values},
in which {inputs} is [input_state],
{dist_pi} is probability distribution of policy with shape [None, num_actions],
{q_values} is Q values with shape [None, num_actions];
or f_create_net(inputs) => {"mean": mean, "stddev": stddev, "v": v},
in which {mean} {stddev} is mean and stddev if normal distribution for continuous actions,
{v} is state value.
:param state_shape:
:param discount_factor:
:param entropy: entropy regulator weight.
:param target_estimator: optional, default to target_estimate.NStepTD
:type target_estimator.TargetEstimator
:param max_advantage: advantage regulation: max advantage value in policy gradient step
:param network_optimizer: optional, default to network.LocalNetworkOptimizer
:type network_optimizer: network.NetworkOptimizer
:param max_gradient: optional, max_gradient clip value
:param sampler: optional, default to sampling.TrajectoryOnSampler.
if None, a TrajectoryOnSampler will be created using batch_size.
:type sampler: sampling.Sampler
:param batch_size: optional, batch_size when creating sampler
:param args:
:param kwargs:
"""
def f_icm(inputs):
"""
:param inputs: a list, [state, next_state, action]
:return: a dict of op
"""
f_se1 = network.Network([inputs[0]], f_se, var_scope='learn_se1')
f_se1 = network.NetworkFunction(f_se1["se"]).output().op
f_se2 = network.Network([inputs[1]], f_se, var_scope='learn_se2')
f_se2 = network.NetworkFunction(f_se2["se"]).output().op
f_ac_out = network.Network([f_se1], f_ac, var_scope='learn_ac')
v = network.NetworkFunction(f_ac_out["v"]).output().op
pi_dist = network.NetworkFunction(f_ac_out["pi"]).output().op
one_hot_action = tf.one_hot(indices=inputs[2],
depth=env.action_space.n,
on_value=1.0,
off_value=0.0,
axis=-1)
f_forward_out = network.Network([one_hot_action, f_se1],
f_forward,
var_scope='learn_forward')
phi2_hat = network.NetworkFunction(
f_forward_out["phi2_hat"]).output().op
f_inverse_out = network.Network([f_se1, f_se2],
f_inverse,
var_scope='learn_inverse')
logits = network.NetworkFunction(
f_inverse_out["logits"]).output().op
bonus = 0.05 * tf.reduce_sum(tf.square(f_se2 - phi2_hat), axis=1)
return {
"pi": pi_dist,
"v": v,
"logits": logits,
"phi1": f_se1,
"phi2": f_se2,
"phi2_hat": phi2_hat,
"bonus": bonus
}
kwargs.update({
"f_icm": f_icm,
"state_shape": state_shape,
"discount_factor": discount_factor,
"entropy": entropy,
"target_estimator": target_estimator,
"max_advantage": max_advantage,
"max_gradient": max_gradient,
"batch_size": batch_size,
})
print "network_optimizer:", network_optimizer
if network_optimizer is None:
network_optimizer = network.LocalOptimizer(grad_clip=max_gradient)
if sampler is None:
sampler = sampling.TrajectoryOnSampler(interval=batch_size)
kwargs.update({"sampler": sampler})
super(ActorCriticWithICM, self).__init__(*args, **kwargs)
pi = self.network["pi"]
if pi is not None:
# discrete action: pi is categorical probability distribution
self._pi_function = network.NetworkFunction(self.network["pi"])
# self._input_action = tf.placeholder(dtype=tf.uint8, shape=[None], name="input_action")
self._pi_distribution = distribution.DiscreteDistribution(
self._pi_function, self._input_action)
q = self.network["q"]
if q is not None:
# network outputs q
self._q_function = network.NetworkFunction(q)
self._v_function = GreedyStateValueFunction(self._q_function)
else:
# network output v
self._v_function = network.NetworkFunction(self.network["v"])
else:
# continuous action: mean / stddev represents normal distribution
dim_action = self.network["mean"].op.shape.as_list()[-1]
self._input_action = tf.placeholder(dtype=tf.float32,
shape=[None, dim_action],
name="input_action")
self._pi_function = network.NetworkFunction(
outputs={
"mean": self.network["mean"],
"stddev": self.network["stddev"]
},
inputs=self.network.inputs)
self._pi_distribution = distribution.NormalDistribution(
self._pi_function, self._input_action)
self._v_function = network.NetworkFunction(self.network["v"])
# continuous action: mean / stddev for normal distribution
self._phi2_hat_function = network.NetworkFunction(
self.network["phi2_hat"])
self._phi2_function = network.NetworkFunction(self.network["phi2"])
self._phi1_function = network.NetworkFunction(self.network["phi1"])
self._logits = network.NetworkFunction(self.network["logits"])
self._bonus = network.NetworkFunction(self.network["bonus"])
if target_estimator is None:
target_estimator = target_estimate.NStepTD(self._v_function,
discount_factor,
bonus=self._bonus)
# target_estimator = target_estimate.GAENStep(self._v_function, discount_factor)
self.network_optimizer = network_optimizer
network_optimizer.add_updater(ActorCriticUpdater(
policy_dist=self._pi_distribution,
v_function=self._v_function,
target_estimator=target_estimator,
entropy=entropy),
name="ac")
network_optimizer.add_updater(network.L2(self.network), name="l2")
network_optimizer.add_updater(ForwardUpdater(
forward_function=self._phi2_hat_function,
feature_function=self._phi2_function,
policy_dist=self._pi_distribution),
name="forward")
network_optimizer.add_updater(InverseUpdater(
inverse_function=self._logits, policy_dist=self._pi_distribution),
name="inverse")
network_optimizer.compile()
self._policy = StochasticPolicy(self._pi_distribution)
def __init__(
self,
f_create_net,
state_shape,
# PPO arguments
discount_factor,
entropy=1e-3,
clip_epsilon=0.2,
# update arguments
epoch_per_step=4,
# target estimate
target_estimator=None,
# optimizer arguments
network_optimizer=None,
max_gradient=10.0,
# sampler arguments
sampler=None,
batch_size=32,
horizon=1024,
*args,
**kwargs):
"""
:param f_create_net: function: f_create_net(inputs) => {"pi": dist_pi, "q": q_values},
in which {inputs} is [input_state],
{dist_pi} is probability distribution of policy with shape [None, num_actions],
{q_values} is Q values with shape [None, num_actions];
or f_create_net(inputs) => {"mean": mean, "stddev": stddev, "v": v},
in which {mean} {stddev} is mean and stddev if normal distribution for continuous actions,
{v} is state value.
:param state_shape:
:param discount_factor:
:param entropy: entropy regulator weight.
:param target_estimator: optional, default to target_estimate.NStepTD
:type target_estimator.TargetEstimator
:param network_optimizer: optional, default to network.LocalNetworkOptimizer
:type network_optimizer: network.NetworkOptimizer
:param max_gradient: optional, max_gradient clip value
:param sampler: optional, default to sampling.TrajectoryOnSampler.
if None, a TrajectoryOnSampler will be created using batch_size.
:type sampler: sampling.Sampler
:param batch_size: optional, batch_size when creating sampler
:param args:
:param kwargs:
"""
kwargs.update({
"f_create_net": f_create_net,
"state_shape": state_shape,
"discount_factor": discount_factor,
"entropy": entropy,
"target_estimator": target_estimator,
"max_gradient": max_gradient,
"batch_size": batch_size,
"horizon": horizon,
"clip_epsilon": clip_epsilon,
"epoch_per_step": epoch_per_step,
})
if network_optimizer is None:
network_optimizer = network.LocalOptimizer(grad_clip=max_gradient)
if sampler is None:
sampler = sampling.TrajectoryOnSampler(interval=horizon,
check_episode_done=False)
kwargs.update({"sampler": sampler})
super(PPO, self).__init__(*args, **kwargs)
self._epoch_py_step = epoch_per_step
self._batch_size = batch_size
pi = self.network["pi"]
if pi is not None:
# discrete action: pi is categorical probability distribution
self._input_action = tf.placeholder(dtype=tf.uint8,
shape=[None],
name="input_action")
self._pi_function = network.NetworkFunction(self.network["pi"])
self._pi_distribution = distribution.DiscreteDistribution(
self._pi_function, self._input_action)
self._old_pi_function = network.NetworkFunction(
self._old_network["pi"])
self._old_pi_distribution = distribution.DiscreteDistribution(
self._old_pi_function, self._input_action)
q = self.network["q"]
if q is not None:
# network outputs q
self._q_function = network.NetworkFunction(q)
self._v_function = GreedyStateValueFunction(self._q_function)
self._old_q_function = network.NetworkFunction(
self._old_network["q"])
self._old_v_function = GreedyStateValueFunction(
self._old_q_function)
else:
# network output v
self._v_function = network.NetworkFunction(self.network["v"])
self._old_v_function = network.NetworkFunction(
self._old_network["v"])
else:
# continuous action: mean / stddev represents normal distribution
dim_action = self.network["mean"].op.shape.as_list()[-1]
self._input_action = tf.placeholder(dtype=tf.float32,
shape=[None, dim_action],
name="input_action")
self._pi_function = network.NetworkFunction(
outputs={
"mean": self.network["mean"],
"stddev": self.network["stddev"]
},
inputs=self.network.inputs)
self._pi_distribution = distribution.NormalDistribution(
self._pi_function, self._input_action)
self._v_function = network.NetworkFunction(self.network["v"])
self._old_pi_function = network.NetworkFunction(
outputs={
"mean": self._old_network["mean"],
"stddev": self._old_network["stddev"]
},
inputs=self._old_network.inputs)
self._old_pi_distribution = distribution.NormalDistribution(
self._old_pi_function, self._input_action)
self._old_v_function = network.NetworkFunction(
self._old_network["v"])
if target_estimator is None:
target_estimator = target_estimate.GAENStep(
self._v_function, discount_factor)
self.network_optimizer = network_optimizer
network_optimizer.add_updater(PPOUpdater(
policy_dist=self._pi_distribution,
old_dist=self._old_pi_distribution,
v_function=self._v_function,
old_v_function=self._old_v_function,
target_estimator=target_estimator,
entropy=entropy,
clip_epsilon=clip_epsilon),
name="ppo")
network_optimizer.add_updater(network.L2(self.network), name="l2")
network_optimizer.compile()
self._policy = StochasticPolicy(self._pi_distribution)