def test_basic(self):
state_dim = 8
action_dim = 4
model = GaussianFullyConnectedActor(
state_dim,
action_dim,
sizes=[7, 6],
activations=["relu", "relu"],
use_batch_norm=True,
)
input = model.input_prototype()
self.assertEqual((1, state_dim), input.float_features.shape)
# Using batch norm requires more than 1 example in training, avoid that
model.eval()
action = model(input)
self.assertEqual((1, action_dim), action.action.shape)
def test_get_log_prob(self):
torch.manual_seed(0)
state_dim = 8
action_dim = 4
model = GaussianFullyConnectedActor(
state_dim,
action_dim,
sizes=[7, 6],
activations=["relu", "relu"],
use_batch_norm=False,
)
input = model.input_prototype()
self.assertEqual((1, state_dim), input.float_features.shape)
action = model(input)
squashed_action = action.action.detach()
action_log_prob = model.get_log_prob(input, squashed_action).detach()
npt.assert_allclose(action.log_prob.detach(), action_log_prob, rtol=1e-4)
def build_actor(
self,
state_normalization_data: NormalizationData,
action_normalization_data: NormalizationData,
) -> ModelBase:
state_dim = get_num_output_features(
state_normalization_data.dense_normalization_parameters)
action_dim = get_num_output_features(
action_normalization_data.dense_normalization_parameters)
return GaussianFullyConnectedActor(
state_dim=state_dim,
action_dim=action_dim,
sizes=self.sizes,
activations=self.activations,
use_batch_norm=self.use_batch_norm,
use_layer_norm=self.use_layer_norm,
)
def test_save_load(self):
state_dim = 8
action_dim = 4
model = GaussianFullyConnectedActor(
state_dim,
action_dim,
sizes=[7, 6],
activations=["relu", "relu"],
use_batch_norm=False,
)
expected_num_params, expected_num_inputs, expected_num_outputs = 6, 1, 1
# Actor output is stochastic and won't match between PyTorch & Caffe2
check_save_load(
self,
model,
expected_num_params,
expected_num_inputs,
expected_num_outputs,
check_equality=False,
)
def build_actor(
self,
state_feature_config: rlt.ModelFeatureConfig,
state_normalization_data: NormalizationData,
action_normalization_data: NormalizationData,
) -> ModelBase:
state_dim = get_num_output_features(
state_normalization_data.dense_normalization_parameters)
action_dim = get_num_output_features(
action_normalization_data.dense_normalization_parameters)
input_dim = state_dim
embedding_dim = self.embedding_dim
embedding_concat = None
if embedding_dim is not None:
embedding_concat = models.EmbeddingBagConcat(
state_dim=state_dim,
model_feature_config=state_feature_config,
embedding_dim=embedding_dim,
)
input_dim = embedding_concat.output_dim
gaussian_fc_actor = GaussianFullyConnectedActor(
state_dim=input_dim,
action_dim=action_dim,
sizes=self.sizes,
activations=self.activations,
use_batch_norm=self.use_batch_norm,
use_layer_norm=self.use_layer_norm,
use_l2_normalization=self.use_l2_normalization,
)
if not embedding_dim:
return gaussian_fc_actor
assert embedding_concat is not None
return models.Sequential( # type: ignore
embedding_concat,
rlt.TensorFeatureData(),
gaussian_fc_actor,
)
def get_sac_trainer(
env: OpenAIGymEnvironment,
rl_parameters: RLParameters,
trainer_parameters: SACTrainerParameters,
critic_training: FeedForwardParameters,
actor_training: FeedForwardParameters,
sac_value_training: Optional[FeedForwardParameters],
use_gpu: bool,
) -> SACTrainer:
assert rl_parameters == trainer_parameters.rl
state_dim = get_num_output_features(env.normalization)
action_dim = get_num_output_features(env.normalization_action)
q1_network = FullyConnectedParametricDQN(state_dim, action_dim,
critic_training.layers,
critic_training.activations)
q2_network = None
# TODO:
# if trainer_parameters.use_2_q_functions:
# q2_network = FullyConnectedParametricDQN(
# state_dim,
# action_dim,
# critic_training.layers,
# critic_training.activations,
# )
value_network = None
if sac_value_training:
value_network = FullyConnectedNetwork(
[state_dim] + sac_value_training.layers + [1],
sac_value_training.activations + ["linear"],
)
actor_network = GaussianFullyConnectedActor(state_dim, action_dim,
actor_training.layers,
actor_training.activations)
min_action_range_tensor_training = torch.full((1, action_dim), -1 + 1e-6)
max_action_range_tensor_training = torch.full((1, action_dim), 1 - 1e-6)
min_action_range_tensor_serving = (
torch.from_numpy(env.action_space.low).float().unsqueeze(
dim=0) # type: ignore
)
max_action_range_tensor_serving = (
torch.from_numpy(env.action_space.high).float().unsqueeze(
dim=0) # type: ignore
)
if use_gpu:
q1_network.cuda()
if q2_network:
q2_network.cuda()
if value_network:
value_network.cuda()
actor_network.cuda()
min_action_range_tensor_training = min_action_range_tensor_training.cuda(
)
max_action_range_tensor_training = max_action_range_tensor_training.cuda(
)
min_action_range_tensor_serving = min_action_range_tensor_serving.cuda(
)
max_action_range_tensor_serving = max_action_range_tensor_serving.cuda(
)
return SACTrainer(
q1_network,
actor_network,
trainer_parameters,
use_gpu=use_gpu,
value_network=value_network,
q2_network=q2_network,
min_action_range_tensor_training=min_action_range_tensor_training,
max_action_range_tensor_training=max_action_range_tensor_training,
min_action_range_tensor_serving=min_action_range_tensor_serving,
max_action_range_tensor_serving=max_action_range_tensor_serving,
)
def get_sac_trainer(
self,
env,
use_gpu,
use_2_q_functions=False,
logged_action_uniform_prior=True,
constrain_action_sum=False,
use_value_network=True,
use_alpha_optimizer=True,
entropy_temperature=None,
):
q_network_params = FeedForwardParameters(layers=[128, 64],
activations=["relu", "relu"])
value_network_params = FeedForwardParameters(
layers=[128, 64], activations=["relu", "relu"])
actor_network_params = FeedForwardParameters(
layers=[128, 64], activations=["relu", "relu"])
state_dim = get_num_output_features(env.normalization)
action_dim = get_num_output_features(
env.normalization_continuous_action)
q1_network = FullyConnectedParametricDQN(state_dim, action_dim,
q_network_params.layers,
q_network_params.activations)
q2_network = None
if use_2_q_functions:
q2_network = FullyConnectedParametricDQN(
state_dim,
action_dim,
q_network_params.layers,
q_network_params.activations,
)
if constrain_action_sum:
actor_network = DirichletFullyConnectedActor(
state_dim,
action_dim,
actor_network_params.layers,
actor_network_params.activations,
)
else:
actor_network = GaussianFullyConnectedActor(
state_dim,
action_dim,
actor_network_params.layers,
actor_network_params.activations,
)
value_network = None
if use_value_network:
value_network = FullyConnectedNetwork(
[state_dim] + value_network_params.layers + [1],
value_network_params.activations + ["linear"],
)
if use_gpu:
q1_network.cuda()
if q2_network:
q2_network.cuda()
if value_network:
value_network.cuda()
actor_network.cuda()
parameters = SACTrainerParameters(
rl=RLParameters(gamma=DISCOUNT, target_update_rate=0.5),
minibatch_size=self.minibatch_size,
q_network_optimizer=OptimizerParameters(),
value_network_optimizer=OptimizerParameters(),
actor_network_optimizer=OptimizerParameters(),
alpha_optimizer=OptimizerParameters()
if use_alpha_optimizer else None,
entropy_temperature=entropy_temperature,
logged_action_uniform_prior=logged_action_uniform_prior,
)
return SACTrainer(
q1_network,
actor_network,
parameters,
use_gpu=use_gpu,
value_network=value_network,
q2_network=q2_network,
)