def __init__(self, env_spec, hidden_sizes=(32, 32), hidden_nonlinearity=NL.tanh, prob_network=None):
"""
:param env_spec: A spec for the mdp.
:param hidden_sizes: list of sizes for the fully connected hidden layers
:param hidden_nonlinearity: nonlinearity used for each hidden layer
:param prob_network: manually specified network for this policy, other network params
are ignored
:return:
"""
Serializable.quick_init(self, locals())
assert isinstance(env_spec.action_space, Discrete)
if prob_network is None:
prob_network = MLP(
input_shape=(env_spec.observation_space.flat_dim,),
output_dim=env_spec.action_space.n,
hidden_sizes=hidden_sizes,
hidden_nonlinearity=hidden_nonlinearity,
output_nonlinearity=NL.softmax,
)
self._l_prob = prob_network.output_layer
self._l_obs = prob_network.input_layer
self._f_prob = ext.compile_function(
[prob_network.input_layer.input_var], L.get_output(prob_network.output_layer)
)
self._dist = Categorical(env_spec.action_space.n)
super(CategoricalMLPPolicy, self).__init__(env_spec)
LasagnePowered.__init__(self, [prob_network.output_layer])
def __init__(self, wrapped_constraint,
env_spec,
yield_zeros_until=1,
optimizer=None,
hidden_sizes=(32,),
hidden_nonlinearity=NL.sigmoid,
lag_time=10,
coeff=1.,
filter_bonuses=False,
max_epochs=25,
*args, **kwargs):
Serializable.quick_init(self,locals())
self._wrapped_constraint = wrapped_constraint
self._env_spec = env_spec
self._filter_bonuses = filter_bonuses
self._yield_zeros_until = yield_zeros_until
self._hidden_sizes = hidden_sizes
self._lag_time = lag_time
self._coeff = coeff
self._max_epochs = max_epochs
self.use_bonus = True
if optimizer is None:
#optimizer = LbfgsOptimizer()
optimizer = FirstOrderOptimizer(max_epochs=max_epochs, batch_size=None)
self._optimizer = optimizer
obs_dim = env_spec.observation_space.flat_dim
predictor_network = MLP(1,hidden_sizes,hidden_nonlinearity,NL.sigmoid,
input_shape=(obs_dim,))
LasagnePowered.__init__(self, [predictor_network.output_layer])
x_var = predictor_network.input_layer.input_var
y_var = TT.matrix("ys")
out_var = L.get_output(predictor_network.output_layer,
{predictor_network.input_layer: x_var})
regression_loss = TT.mean(TT.square(y_var - out_var))
optimizer_args = dict(
loss=regression_loss,
target=self,
inputs=[x_var, y_var],
)
self._optimizer.update_opt(**optimizer_args)
self._f_predict = compile_function([x_var],out_var)
self._fit_steps = 0
self.has_baseline = self._wrapped_constraint.has_baseline
if self.has_baseline:
self.baseline = self._wrapped_constraint.baseline
def __init__(self,
env_spec,
hidden_sizes=(32, ),
state_include_action=True,
hidden_nonlinearity=NL.tanh,
output_b_init=None,
weight_signal=1.0,
weight_nonsignal=1.0,
weight_smc=1.0):
"""
:param env_spec: A spec for the env.
:param hidden_sizes: list of sizes for the fully connected hidden layers
:param hidden_nonlinearity: nonlinearity used for each hidden layer
:return:
"""
assert isinstance(env_spec.action_space, Discrete)
Serializable.quick_init(self, locals())
super(InitCategoricalGRUPolicy, self).__init__(env_spec)
assert len(hidden_sizes) == 1
output_b_init = compute_output_b_init(env_spec.action_space.names,
output_b_init, weight_signal,
weight_nonsignal, weight_smc)
if state_include_action:
input_shape = (env_spec.observation_space.flat_dim +
env_spec.action_space.flat_dim, )
else:
input_shape = (env_spec.observation_space.flat_dim, )
prob_network = InitGRUNetwork(input_shape=input_shape,
output_dim=env_spec.action_space.n,
hidden_dim=hidden_sizes[0],
hidden_nonlinearity=hidden_nonlinearity,
output_nonlinearity=NL.softmax,
output_b_init=output_b_init)
self._prob_network = prob_network
self._state_include_action = state_include_action
self._f_step_prob = ext.compile_function(
[
prob_network.step_input_layer.input_var,
prob_network.step_prev_hidden_layer.input_var
],
L.get_output([
prob_network.step_output_layer, prob_network.step_hidden_layer
]))
self._prev_action = None
self._prev_hidden = None
self._hidden_sizes = hidden_sizes
self._dist = RecurrentCategorical(env_spec.action_space.n)
self.reset()
LasagnePowered.__init__(self, [prob_network.output_layer])
def __init__(self,
output_dim,
hidden_sizes,
hidden_nonlinearity,
output_nonlinearity,
hidden_W_init=LI.GlorotUniform(),
hidden_b_init=LI.Constant(0.),
output_W_init=LI.GlorotUniform(),
output_b_init=LI.Constant(0.),
name=None,
input_var=None,
input_layer=None,
input_shape=None,
batch_norm=False):
Serializable.quick_init(self, locals())
if name is None:
prefix = ""
else:
prefix = name + "_"
if input_layer is None:
l_in = L.InputLayer(shape=(None, ) + input_shape,
input_var=input_var)
else:
l_in = input_layer
self._layers = [l_in]
l_hid = l_in
for idx, hidden_size in enumerate(hidden_sizes):
l_hid = L.DenseLayer(
l_hid,
num_units=hidden_size,
nonlinearity=hidden_nonlinearity,
name="%shidden_%d" % (prefix, idx),
W=hidden_W_init,
b=hidden_b_init,
)
if batch_norm:
l_hid = L.batch_norm(l_hid)
self._layers.append(l_hid)
l_out = L.DenseLayer(
l_hid,
num_units=output_dim,
nonlinearity=output_nonlinearity,
name="%soutput" % (prefix, ),
W=output_W_init,
b=output_b_init,
)
self._layers.append(l_out)
self._l_in = l_in
self._l_out = l_out
# self._input_var = l_in.input_var
self._output = L.get_output(l_out)
LasagnePowered.__init__(self, [l_out])
def initialize(self, env_spec, network):
"""Call this in subclass's initialize, after building the network"""
StochasticPolicy.__init__(self, env_spec)
LasagnePowered.__init__(self, network.output_layers)
if self.initial_param_values is not None:
print("\nSetting initial NN param values")
print("param values before loading initial values: ",
self.get_param_values()[:5])
self.set_param_values(self.initial_param_values)
print("param values after loading: ",
self.get_param_values()[:5])
def __init__(
self,
env_spec,
hidden_sizes=(),
hidden_nonlinearity=NL.tanh,
num_seq_inputs=1,
neat_output_dim=20,
neat_network=None,
prob_network=None,
):
"""
:param env_spec: A spec for the mdp.
:param hidden_sizes: list of sizes for the fully connected hidden layers
:param hidden_nonlinearity: nonlinearity used for each hidden layer
:param prob_network: manually specified network for this policy, other network params
are ignored
:return:
"""
Serializable.quick_init(self, locals())
assert isinstance(env_spec.action_space, Discrete)
# create random NEAT MLP
if neat_network is None:
neat_network = MLP(
input_shape=(env_spec.observation_space.flat_dim * num_seq_inputs,),
output_dim=neat_output_dim,
hidden_sizes=(12, 12),
hidden_nonlinearity=hidden_nonlinearity,
output_nonlinearity=NL.identity,
)
if prob_network is None:
prob_network = MLP(
input_shape=(L.get_output_shape(neat_network.output_layer)[1],),
output_dim=env_spec.action_space.n,
hidden_sizes=hidden_sizes,
hidden_nonlinearity=hidden_nonlinearity,
output_nonlinearity=NL.softmax,
)
self._phi = neat_network.output_layer
self._obs = neat_network.input_layer
self._neat_output = ext.compile_function([neat_network.input_layer.input_var], L.get_output(neat_network.output_layer))
self.prob_network = prob_network
self._l_prob = prob_network.output_layer
self._l_obs = prob_network.input_layer
self._f_prob = ext.compile_function([prob_network.input_layer.input_var], L.get_output(prob_network.output_layer))
self._dist = Categorical(env_spec.action_space.n)
super(PowerGradientPolicy, self).__init__(env_spec)
LasagnePowered.__init__(self, [prob_network.output_layer])
def __init__(
self,
env_spec,
hidden_sizes=(32,),
state_include_action=True,
hidden_nonlinearity=NL.tanh):
"""
:param env_spec: A spec for the env.
:param hidden_sizes: list of sizes for the fully connected hidden layers
:param hidden_nonlinearity: nonlinearity used for each hidden layer
:return:
"""
assert isinstance(env_spec.action_space, Discrete)
Serializable.quick_init(self, locals())
super(CategoricalGRUPolicy, self).__init__(env_spec)
assert len(hidden_sizes) == 1
if state_include_action:
input_shape = (env_spec.observation_space.flat_dim + env_spec.action_space.flat_dim,)
else:
input_shape = (env_spec.observation_space.flat_dim,)
prob_network = GRUNetwork(
input_shape=input_shape,
output_dim=env_spec.action_space.n,
hidden_dim=hidden_sizes[0],
hidden_nonlinearity=hidden_nonlinearity,
output_nonlinearity=NL.softmax,
)
self._prob_network = prob_network
self._state_include_action = state_include_action
self._f_step_prob = ext.compile_function(
[
prob_network.step_input_layer.input_var,
prob_network.step_prev_hidden_layer.input_var
],
L.get_output([
prob_network.step_output_layer,
prob_network.step_hidden_layer
])
)
self._prev_action = None
self._prev_hidden = None
self._hidden_sizes = hidden_sizes
self._dist = RecurrentCategorical(env_spec.action_space.n)
self.reset()
LasagnePowered.__init__(self, [prob_network.output_layer])
def __init__(
self,
n_in,
n_hidden,
n_out,
layers_type,
n_batches,
trans_func=lasagne.nonlinearities.rectify,
out_func=lasagne.nonlinearities.linear,
batch_size=100,
n_samples=10,
prior_sd=0.5,
use_reverse_kl_reg=False,
reverse_kl_reg_factor=0.1,
likelihood_sd=5.0,
second_order_update=False,
learning_rate=0.0001,
compression=False,
information_gain=True,
):
Serializable.quick_init(self, locals())
assert len(layers_type) == len(n_hidden) + 1
self.n_in = n_in
self.n_hidden = n_hidden
self.n_out = n_out
self.batch_size = batch_size
self.transf = trans_func
self.outf = out_func
self.n_samples = n_samples
self.prior_sd = prior_sd
self.layers_type = layers_type
self.n_batches = n_batches
self.use_reverse_kl_reg = use_reverse_kl_reg
self.reverse_kl_reg_factor = reverse_kl_reg_factor
self.likelihood_sd = likelihood_sd
self.second_order_update = second_order_update
self.learning_rate = learning_rate
self.compression = compression
self.information_gain = information_gain
assert self.information_gain or self.compression
# Build network architecture.
self.build_network()
# Build model might depend on this.
LasagnePowered.__init__(self, [self.network])
# Compile theano functions.
self.build_model()
def __init__(
self,
env_spec,
hidden_sizes=(32, 32),
hidden_nonlinearity=NL.rectify,
hidden_W_init=LI.HeUniform(),
hidden_b_init=LI.Constant(0.),
output_nonlinearity=NL.tanh,
output_W_init=LI.Uniform(-3e-3, 3e-3),
output_b_init=LI.Uniform(-3e-3, 3e-3),
bn=False):
Serializable.quick_init(self, locals())
l_obs = L.InputLayer(shape=(None, env_spec.observation_space.flat_dim))
l_hidden = l_obs
if bn:
l_hidden = batch_norm(l_hidden)
for idx, size in enumerate(hidden_sizes):
l_hidden = L.DenseLayer(
l_hidden,
num_units=size,
W=hidden_W_init,
b=hidden_b_init,
nonlinearity=hidden_nonlinearity,
name="h%d" % idx
)
if bn:
l_hidden = batch_norm(l_hidden)
l_output = L.DenseLayer(
l_hidden,
num_units=env_spec.action_space.flat_dim,
W=output_W_init,
b=output_b_init,
nonlinearity=output_nonlinearity,
name="output"
)
# Note the deterministic=True argument. It makes sure that when getting
# actions from single observations, we do not update params in the
# batch normalization layers
action_var = L.get_output(l_output, deterministic=True)
self._output_layer = l_output
self._f_actions = ext.compile_function([l_obs.input_var], action_var)
super(DeterministicMLPPolicy, self).__init__(env_spec)
LasagnePowered.__init__(self, [l_output])
def __init__(
self,
env_spec,
hidden_sizes=(32, 32),
hidden_nonlinearity=NL.rectify,
hidden_W_init=LI.HeUniform(),
hidden_b_init=LI.Constant(0.),
output_nonlinearity=NL.tanh,
output_W_init=LI.Uniform(-3e-3, 3e-3),
output_b_init=LI.Uniform(-3e-3, 3e-3),
bn=False):
Serializable.quick_init(self, locals())
l_obs = L.InputLayer(shape=(None, env_spec.observation_space.flat_dim))
l_hidden = l_obs
if bn:
l_hidden = batch_norm(l_hidden)
for idx, size in enumerate(hidden_sizes):
l_hidden = L.DenseLayer(
l_hidden,
num_units=size,
W=hidden_W_init,
b=hidden_b_init,
nonlinearity=hidden_nonlinearity,
name="h%d" % idx
)
if bn:
l_hidden = batch_norm(l_hidden)
l_output = L.DenseLayer(
l_hidden,
num_units=env_spec.action_space.flat_dim,
W=output_W_init,
b=output_b_init,
nonlinearity=output_nonlinearity,
name="output"
)
# Note the deterministic=True argument. It makes sure that when getting
# actions from single observations, we do not update params in the
# batch normalization layers
action_var = L.get_output(l_output, deterministic=True)
self._output_layer = l_output
self._f_actions = ext.compile_function([l_obs.input_var], action_var)
super(DeterministicMLPPolicy, self).__init__(env_spec)
LasagnePowered.__init__(self, [l_output])
def __init__(
self,
env_spec,
conv_filters, conv_filter_sizes, conv_strides, conv_pads,
hidden_sizes=[],
hidden_nonlinearity=NL.rectify,
output_nonlinearity=NL.softmax,
prob_network=None,
name=None,
):
"""
:param env_spec: A spec for the mdp.
:param hidden_sizes: list of sizes for the fully connected hidden layers
:param hidden_nonlinearity: nonlinearity used for each hidden layer
:param prob_network: manually specified network for this policy, other network params
are ignored
:return:
"""
Serializable.quick_init(self, locals())
assert isinstance(env_spec.action_space, Discrete)
self._env_spec = env_spec
if prob_network is None:
if not name:
name = "categorical_conv_prob_network"
prob_network = ConvNetwork(
input_shape=env_spec.observation_space.shape,
output_dim=env_spec.action_space.n,
conv_filters=conv_filters,
conv_filter_sizes=conv_filter_sizes,
conv_strides=conv_strides,
conv_pads=conv_pads,
hidden_sizes=hidden_sizes,
hidden_nonlinearity=hidden_nonlinearity,
output_nonlinearity=output_nonlinearity,
name=name,
)
self._l_prob = prob_network.output_layer
self._l_obs = prob_network.input_layer
self._f_prob = ext.compile_function(
[prob_network.input_layer.input_var],
L.get_output(prob_network.output_layer)
)
self._dist = Categorical(env_spec.action_space.n)
super(CategoricalConvPolicy, self).__init__(env_spec)
LasagnePowered.__init__(self, [prob_network.output_layer])
def __init__(
self,
env_spec,
latent_dim=0, # all this is fake
latent_name='categorical',
bilinear_integration=False,
resample=False, # until here
hidden_sizes=(32, 32),
hidden_nonlinearity=NL.tanh,
prob_network=None,
):
"""
:param env_spec: A spec for the mdp.
:param hidden_sizes: list of sizes for the fully connected hidden layers
:param hidden_nonlinearity: nonlinearity used for each hidden layer
:param prob_network: manually specified network for this policy, other network params
are ignored
:return:
"""
#bullshit
self.latent_dim = latent_dim ##could I avoid needing this self for the get_action?
self.latent_name = latent_name
self.bilinear_integration = bilinear_integration
self.resample = resample
self._set_std_to_0 = False
# self._set_std_to_0 = True
Serializable.quick_init(self, locals())
assert isinstance(env_spec.action_space, Discrete)
if prob_network is None:
prob_network = MLP(
input_shape=(env_spec.observation_space.flat_dim, ),
output_dim=env_spec.action_space.n,
hidden_sizes=hidden_sizes,
hidden_nonlinearity=hidden_nonlinearity,
output_nonlinearity=NL.softmax,
)
self._l_prob = prob_network.output_layer
self._l_obs = prob_network.input_layer
self._f_prob = ext.compile_function(
[prob_network.input_layer.input_var],
L.get_output(prob_network.output_layer))
self._dist = Categorical(env_spec.action_space.n)
self._layers = prob_network.layers # Rui: added layers for function get_params()
super(CategoricalMLPPolicy, self).__init__(env_spec)
LasagnePowered.__init__(self, [prob_network.output_layer])
def __init__(self, n_in,
n_hidden,
n_out,
layers_type,
n_batches,
trans_func=lasagne.nonlinearities.rectify,
out_func=lasagne.nonlinearities.linear,
batch_size=100,
n_samples=10,
prior_sd=0.5,
use_reverse_kl_reg=False,
reverse_kl_reg_factor=0.1,
likelihood_sd=5.0,
second_order_update=False,
learning_rate=0.0001,
compression=False,
information_gain=True,
):
Serializable.quick_init(self, locals())
assert len(layers_type) == len(n_hidden) + 1
self.n_in = n_in
self.n_hidden = n_hidden
self.n_out = n_out
self.batch_size = batch_size
self.transf = trans_func
self.outf = out_func
self.n_samples = n_samples
self.prior_sd = prior_sd
self.layers_type = layers_type
self.n_batches = n_batches
self.use_reverse_kl_reg = use_reverse_kl_reg
self.reverse_kl_reg_factor = reverse_kl_reg_factor
self.likelihood_sd = likelihood_sd
self.second_order_update = second_order_update
self.learning_rate = learning_rate
self.compression = compression
self.information_gain = information_gain
assert self.information_gain or self.compression
# Build network architecture.
self.build_network()
# Build model might depend on this.
LasagnePowered.__init__(self, [self.network])
# Compile theano functions.
self.build_model()
def __init__(
self,
env_spec,
hidden_sizes=(32, 32),
hidden_nonlinearity=NL.tanh,
num_seq_inputs=1,
prob_network=None,
):
"""
:param env_spec: A spec for the mdp.
:param hidden_sizes: list of sizes for the fully connected hidden layers
:param hidden_nonlinearity: nonlinearity used for each hidden layer
:param prob_network: manually specified network for this policy, other network params
are ignored
:return:
"""
Serializable.quick_init(self, locals())
assert isinstance(env_spec.action_space, Product)
self._Da = env_spec.action_space.comp_dim
self._actnum = len(self._Da)
self._slice = [0] + np.cumsum(self._Da).tolist()
if prob_network is None:
prob_network = MLP2(
input_shape=(env_spec.observation_space.flat_dim *
num_seq_inputs, ),
output_sizes=self._Da,
hidden_sizes=hidden_sizes,
hidden_nonlinearity=hidden_nonlinearity,
output_nonlinearity=NL.softmax,
)
#self._l_prob = prob_network.output_layer
self._l_prob = prob_network.output_layer
#self._logits = [prob_network.output[:, self._slice[i]:self._slice[i + 1]] for i in range(self._actnum)]
#l_probs = [NL.softmax(logit) for logit in self._logits]
#self._l_prob = it.product(l_probs)
self._l_obs = prob_network.input_layer
self._f_prob = ext.compile_function(
[prob_network.input_layer.input_var],
L.get_output(prob_network.output_layer))
# self._f_prob = ext.compile_function([prob_network.input_layer.input_var], L.get_output(
# self._l_probs))
self._dist = Categorical2(self._Da)
super(CategoricalMLPPolicy2, self).__init__(env_spec)
LasagnePowered.__init__(self, [prob_network.output_layer])
def __init__(
self,
name,
env_spec,
hidden_sizes=(32, 32),
hidden_nonlinearity=NL.tanh,
num_seq_inputs=1,
):
"""
:param env_spec: A spec for the mdp.
:param hidden_sizes: list of sizes for the fully connected hidden layers
:param hidden_nonlinearity: nonlinearity used for each hidden layer
:param prob_network: manually specified network for this policy, other network params
are ignored
:return:
"""
Serializable.quick_init(self, locals())
assert isinstance(env_spec.action_space, Discrete)
self._env_spec = env_spec
# print( env_spec.observation_space.shape )
q_network = MLP(
input_shape=(env_spec.observation_space.flat_dim * num_seq_inputs,),
output_dim=env_spec.action_space.n,
hidden_sizes=hidden_sizes,
hidden_nonlinearity=hidden_nonlinearity,
output_nonlinearity=NL.linear,
name=name
)
self._l_q = q_network.output_layer
self._l_obs = q_network.input_layer
self._f_q = ext.compile_function(
[q_network.input_layer.input_var],
L.get_output(q_network.output_layer)
)
self._dist = Categorical(env_spec.action_space.n)
super(CategoricalMlpQPolicy, self).__init__(env_spec)
LasagnePowered.__init__(self, [q_network.output_layer])
def __init__(self, output_dim, hidden_sizes, hidden_nonlinearity,
output_nonlinearity, hidden_W_init=LI.GlorotUniform(), hidden_b_init=LI.Constant(0.),
output_W_init=LI.GlorotUniform(), output_b_init=LI.Constant(0.),
name=None, input_var=None, input_layer=None, input_shape=None, batch_norm=False):
Serializable.quick_init(self, locals())
if name is None:
prefix = ""
else:
prefix = name + "_"
if input_layer is None:
l_in = L.InputLayer(shape=(None,) + input_shape, input_var=input_var)
else:
l_in = input_layer
self._layers = [l_in]
l_hid = l_in
for idx, hidden_size in enumerate(hidden_sizes):
l_hid = L.DenseLayer(
l_hid,
num_units=hidden_size,
nonlinearity=hidden_nonlinearity,
name="%shidden_%d" % (prefix, idx),
W=hidden_W_init,
b=hidden_b_init,
)
if batch_norm:
l_hid = L.batch_norm(l_hid)
self._layers.append(l_hid)
l_out = L.DenseLayer(
l_hid,
num_units=output_dim,
nonlinearity=output_nonlinearity,
name="%soutput" % (prefix,),
W=output_W_init,
b=output_b_init,
)
self._layers.append(l_out)
self._l_in = l_in
self._l_out = l_out
# self._input_var = l_in.input_var
self._output = L.get_output(l_out)
LasagnePowered.__init__(self, [l_out])
def __init__(
self,
name,
env_spec,
policies,
mean_network=None,
):
"""
:param name: base tf variable name
:param env_spec: A spec for the mdp.
:param policies: list of policies
:return:
"""
Serializable.quick_init(self, locals())
self.policies = policies
self.n = len(policies)
self.training = True # training vs testing
self.env_spec = env_spec
super(MultiMLPPolicy, self).__init__(env_spec)
LasagnePowered.__init__(self, [self.policies[0]._l_mean, self.policies[0]._l_log_std])
def __init__(
self,
env_spec,
hidden_sizes=(32, 32),
hidden_nonlinearity=NL.tanh,
prob_network=None,
):
"""
:param env_spec: A spec for the mdp.
:param hidden_sizes: list of sizes for the fully connected hidden layers
:param hidden_nonlinearity: nonlinearity used for each hidden layer
:param prob_network: manually specified network for this policy, other network params
are ignored
:return:
"""
Serializable.quick_init(self, locals())
assert isinstance(env_spec.action_space, Discrete)
if prob_network is None:
prob_network = MLP(
input_shape=(env_spec.observation_space.flat_dim, ),
output_dim=env_spec.action_space.n,
hidden_sizes=hidden_sizes,
hidden_nonlinearity=hidden_nonlinearity,
output_nonlinearity=NL.softmax,
)
self._l_prob = prob_network.output_layer
self._l_obs = prob_network.input_layer
self._f_prob = ext.compile_function(
[prob_network.input_layer.input_var],
L.get_output(prob_network.output_layer))
self._dist = Categorical(env_spec.action_space.n)
super(CategoricalMLPPolicy, self).__init__(env_spec)
LasagnePowered.__init__(self, [prob_network.output_layer])
def __init__(self,
env_spec,
conv_filters,
conv_filter_sizes,
conv_strides,
conv_pads,
hidden_sizes=[],
hidden_nonlinearity=NL.rectify,
output_nonlinearity=NL.linear,
network=None):
Serializable.quick_init(self, locals())
if network is None:
network = ConvNetwork(input_shape=env_spec.observation_space.shape,
output_dim=1,
conv_filters=conv_filters,
conv_filter_sizes=conv_filter_sizes,
conv_strides=conv_strides,
conv_pads=conv_pads,
hidden_sizes=hidden_sizes,
hidden_nonlinearity=hidden_nonlinearity,
output_nonlinearity=output_nonlinearity,
name="continuous_conv_v_function")
# Note the deterministic=True argument. It makes sure that when getting
# actions from single observations, we do not update params in the
# batch normalization layers
self._env_spec = env_spec
self._output_layer = network.output_layer
self._input_layer = network.input_layer
self._f_values = ext.compile_function(inputs=[network.input_var],
outputs=L.get_output(
network.output_layer,
deterministic=True))
LasagnePowered.__init__(self, [network.output_layer])
def __init__(
self,
env_spec,
hidden_sizes=(32, 32),
hidden_nonlinearity=NL.rectify,
hidden_W_init=lasagne.init.HeUniform(),
hidden_b_init=lasagne.init.Constant(0.),
action_merge_layer=-2,
output_nonlinearity=None,
output_W_init=lasagne.init.Uniform(-3e-3, 3e-3),
output_b_init=lasagne.init.Uniform(-3e-3, 3e-3),
bn=False):
Serializable.quick_init(self, locals())
l_obs = L.InputLayer(shape=(None, env_spec.observation_space.flat_dim), name="obs")
l_action = L.InputLayer(shape=(None, env_spec.action_space.flat_dim), name="actions")
n_layers = len(hidden_sizes) + 1
if n_layers > 1:
action_merge_layer = \
(action_merge_layer % n_layers + n_layers) % n_layers
else:
action_merge_layer = 1
l_hidden = l_obs
for idx, size in enumerate(hidden_sizes):
if bn:
l_hidden = batch_norm(l_hidden)
if idx == action_merge_layer:
l_hidden = L.ConcatLayer([l_hidden, l_action])
l_hidden = L.DenseLayer(
l_hidden,
num_units=size,
W=hidden_W_init,
b=hidden_b_init,
nonlinearity=hidden_nonlinearity,
name="h%d" % (idx + 1)
)
if action_merge_layer == n_layers:
l_hidden = L.ConcatLayer([l_hidden, l_action])
l_output = L.DenseLayer(
l_hidden,
num_units=1,
W=output_W_init,
b=output_b_init,
nonlinearity=output_nonlinearity,
name="output"
)
output_var = L.get_output(l_output, deterministic=True).flatten()
self._f_qval = ext.compile_function([l_obs.input_var, l_action.input_var], output_var)
self._output_layer = l_output
self._obs_layer = l_obs
self._action_layer = l_action
self._output_nonlinearity = output_nonlinearity
LasagnePowered.__init__(self, [l_output])
def __init__(
self,
env_spec,
env,
pkl_path=None,
json_path=None,
npz_path=None,
trainable_snn=True,
##CF - latents units at the input
latent_dim=3, # we keep all these as the dim of the output of the other MLP and others that we will need!
latent_name='categorical',
bilinear_integration=False, # again, needs to match!
resample=False, # this can change: frequency of resampling the latent?
hidden_sizes_snn=(32, 32),
hidden_sizes_selector=(10, 10),
external_latent=False,
learn_std=True,
init_std=1.0,
adaptive_std=False,
std_share_network=False,
std_hidden_sizes=(32, 32),
std_hidden_nonlinearity=NL.tanh,
hidden_nonlinearity=NL.tanh,
output_nonlinearity=None,
min_std=1e-4,
):
self.latent_dim = latent_dim ## could I avoid needing this self for the get_action?
self.latent_name = latent_name
self.bilinear_integration = bilinear_integration
self.resample = resample
self.min_std = min_std
self.hidden_sizes_snn = hidden_sizes_snn
self.hidden_sizes_selector = hidden_sizes_selector
self.pre_fix_latent = np.array([]) # if this is not empty when using reset() it will use this latent
self.latent_fix = np.array([]) # this will hold the latents variable sampled in reset()
self.shared_latent_var = theano.shared(self.latent_fix) # this is for external lat! update that
self._set_std_to_0 = False
self.trainable_snn = trainable_snn
self.external_latent = external_latent
self.pkl_path = pkl_path
self.json_path = json_path
self.npz_path = npz_path
self.old_policy = None
if self.json_path: # there is another one after defining all the NN to warm-start the params of the SNN
data = json.load(
open(os.path.join(config.PROJECT_PATH, self.json_path), 'r')) # I should do this with the json file
self.old_policy_json = data['json_args']["policy"]
self.latent_dim = self.old_policy_json['latent_dim']
self.latent_name = self.old_policy_json['latent_name']
self.bilinear_integration = self.old_policy_json['bilinear_integration']
self.resample = self.old_policy_json['resample'] # this could not be needed...
self.min_std = self.old_policy_json['min_std']
self.hidden_sizes_snn = self.old_policy_json['hidden_sizes']
elif self.pkl_path:
data = joblib.load(os.path.join(config.PROJECT_PATH, self.pkl_path))
self.old_policy = data["policy"]
self.latent_dim = self.old_policy.latent_dim
self.latent_name = self.old_policy.latent_name
self.bilinear_integration = self.old_policy.bilinear_integration
self.resample = self.old_policy.resample # this could not be needed...
self.min_std = self.old_policy.min_std
self.hidden_sizes_snn = self.old_policy.hidden_sizes
if self.latent_name == 'normal':
self.latent_dist = DiagonalGaussian(self.latent_dim)
self.latent_dist_info = dict(mean=np.zeros(self.latent_dim), log_std=np.zeros(self.latent_dim))
elif self.latent_name == 'bernoulli':
self.latent_dist = Bernoulli(self.latent_dim)
self.latent_dist_info = dict(p=0.5 * np.ones(self.latent_dim))
elif self.latent_name == 'categorical':
self.latent_dist = Categorical(self.latent_dim)
if self.latent_dim > 0:
self.latent_dist_info = dict(prob=1. / self.latent_dim * np.ones(self.latent_dim))
else:
self.latent_dist_info = dict(prob=np.ones(self.latent_dim)) # this is an empty array
else:
raise NotImplementedError
Serializable.quick_init(self, locals())
assert isinstance(env_spec.action_space, Box)
# retrieve dimensions and check consistency
if isinstance(env, MazeEnv) or isinstance(env, GatherEnv):
self.obs_robot_dim = env.robot_observation_space.flat_dim
self.obs_maze_dim = env.maze_observation_space.flat_dim
elif isinstance(env, NormalizedEnv):
if isinstance(env.wrapped_env, MazeEnv) or isinstance(env.wrapped_env, GatherEnv):
self.obs_robot_dim = env.wrapped_env.robot_observation_space.flat_dim
self.obs_maze_dim = env.wrapped_env.maze_observation_space.flat_dim
else:
self.obs_robot_dim = env.wrapped_env.observation_space.flat_dim
self.obs_maze_dim = 0
else:
self.obs_robot_dim = env.observation_space.flat_dim
self.obs_maze_dim = 0
# print("the dims of the env are(rob/maze): ", self.obs_robot_dim, self.obs_maze_dim)
all_obs_dim = env_spec.observation_space.flat_dim
assert all_obs_dim == self.obs_robot_dim + self.obs_maze_dim
if self.external_latent: # in case we want to fix the latent externally
l_all_obs_var = L.InputLayer(shape=(None,) + (self.obs_robot_dim + self.obs_maze_dim,))
all_obs_var = l_all_obs_var.input_var
# l_selection = ConstOutputLayer(incoming=l_all_obs_var, output_var=self.shared_latent_var)
l_selection = ParamLayer(incoming=l_all_obs_var, num_units=self.latent_dim, param=self.shared_latent_var,
trainable=False) # Rui: change False to True? this is a simple layer that directly outputs self.shared_latent_var
selection_var = L.get_output(l_selection)
else:
# create network with softmax output: it will be the latent 'selector'!
latent_selection_network = MLP(
input_shape=(self.obs_robot_dim + self.obs_maze_dim,),
output_dim=self.latent_dim,
hidden_sizes=self.hidden_sizes_selector,
hidden_nonlinearity=hidden_nonlinearity,
output_nonlinearity=NL.softmax,
)
l_all_obs_var = latent_selection_network.input_layer
all_obs_var = latent_selection_network.input_layer.input_var
# collect the output to select the behavior of the robot controller (equivalent to latents)
l_selection = latent_selection_network.output_layer
selection_var = L.get_output(l_selection)
# split all_obs into the robot and the maze obs --> ROBOT goes first!!
l_obs_robot = CropLayer(l_all_obs_var, start_index=None, end_index=self.obs_robot_dim)
l_obs_maze = CropLayer(l_all_obs_var, start_index=self.obs_robot_dim, end_index=None)
# for _ in range(10):
# print("OK!")
# print(self.obs_robot_dim)
# print(self.obs_maze_dim)
obs_robot_var = all_obs_var[:, :self.obs_robot_dim]
obs_maze_var = all_obs_var[:, self.obs_robot_dim:]
# Enlarge obs with the selectors (or latents). Here just computing the final input dim
if self.bilinear_integration:
l_obs_snn = BilinearIntegrationLayer([l_obs_robot, l_selection])
else:
l_obs_snn = L.ConcatLayer([l_obs_robot, l_selection])
action_dim = env_spec.action_space.flat_dim
# create the action network
mean_network = MLP(
input_layer=l_obs_snn, # input the layer that handles the integration of the selector
output_dim=action_dim,
hidden_sizes=self.hidden_sizes_snn,
hidden_nonlinearity=hidden_nonlinearity,
output_nonlinearity=output_nonlinearity,
name="meanMLP",
)
self._layers_mean = mean_network.layers
l_mean = mean_network.output_layer
if adaptive_std:
log_std_network = MLP(
input_layer=l_obs_snn,
output_dim=action_dim,
hidden_sizes=std_hidden_sizes,
hidden_nonlinearity=std_hidden_nonlinearity,
output_nonlinearity=None,
name="log_stdMLP"
)
l_log_std = log_std_network.output_layer
self._layers_log_std = log_std_network.layers
else:
l_log_std = ParamLayer(
incoming=mean_network.input_layer,
num_units=action_dim,
param=lasagne.init.Constant(np.log(init_std)),
name="output_log_std",
trainable=learn_std,
)
self._layers_log_std = [l_log_std]
self._layers_snn = self._layers_mean + self._layers_log_std # this returns a list with the "snn" layers
if not self.trainable_snn:
for layer in self._layers_snn:
for param, tags in layer.params.items(): # params of layer are OrDict: key=the shared var, val=tags
tags.remove("trainable")
if self.json_path and self.npz_path:
warm_params_dict = dict(np.load(os.path.join(config.PROJECT_PATH, self.npz_path)))
# keys = list(param_dict.keys())
self.set_params_snn(warm_params_dict)
elif self.pkl_path:
data = joblib.load(os.path.join(config.PROJECT_PATH, self.pkl_path))
warm_params = data['policy'].get_params_internal()
self.set_params_snn(warm_params)
mean_var, log_std_var = L.get_output([l_mean, l_log_std])
if self.min_std is not None:
log_std_var = TT.maximum(log_std_var, np.log(self.min_std))
self._l_mean = l_mean
self._l_log_std = l_log_std
self._dist = DiagonalGaussian(action_dim)
LasagnePowered.__init__(self, [l_mean, l_log_std])
super(GaussianMLPPolicy_snn_hier, self).__init__(env_spec)
# debug
obs_snn_var = L.get_output(l_obs_snn)
self._l_obs_snn = ext.compile_function(
inputs=[all_obs_var],
outputs=obs_snn_var,
)
# self._log_std = ext.compile_function(
# inputs=[all_obs_var],
# outputs=log_std_var,
# )
self._mean = ext.compile_function(
inputs=[all_obs_var],
outputs=mean_var,
)
self._f_dist = ext.compile_function(
inputs=[all_obs_var],
outputs=[mean_var, log_std_var],
)
# if I want to monitor the selector output
self._f_select = ext.compile_function(
inputs=[all_obs_var],
outputs=selection_var,
)
def __init__(
self,
env_spec,
zero_gradient_cutoff,
hidden_sizes=(32, 32),
learn_std=True,
init_std=1.0,
adaptive_std=False,
std_share_network=False,
std_hidden_sizes=(32, 32),
min_std=1e-6,
std_hidden_nonlinearity=NL.tanh,
hidden_nonlinearity=NL.tanh,
output_nonlinearity=None,
mean_network=None,
std_network=None,
dist_cls=DiagonalGaussian,
adversarial=True,
eps=0.1,
probability=0.0,
use_dynamics=False,
random=False,
observable_noise=False,
use_max_norm=True,
record_traj=False,
set_dynamics=None,
mask_augmentation=False,
):
"""
:param env_spec:
:param hidden_sizes: list of sizes for the fully-connected hidden layers
:param learn_std: Is std trainable
:param init_std: Initial std
:param adaptive_std:
:param std_share_network:
:param std_hidden_sizes: list of sizes for the fully-connected layers for std
:param min_std: whether to make sure that the std is at least some threshold value, to avoid numerical issues
:param std_hidden_nonlinearity:
:param hidden_nonlinearity: nonlinearity used for each hidden layer
:param output_nonlinearity: nonlinearity for the output layer
:param mean_network: custom network for the output mean
:param std_network: custom network for the output log std
:param dist_cls: defines probability distribution over actions
The following parameters are specific to the AdversarialPolicy Class.
:param adversarial: whether the policy should incorporate adversarial states during rollout
:param eps: the strength of the adversarial perturbation
:param probability: frequency of adversarial updates. If 0, do exactly one update at the beginning of
every episode
:param use_dynamics: if True, generate adversarial dynamics updates, otherwise do adversarial state updates
:param random: if True, use a random perturbation instead of an adversarial perturbation
:param observable_noise: if True, don't set adversarial state in the environment, treat it as noise
on observation
:param zero_gradient_cutoff: determines cutoff index for zero-ing out gradients - this is useful when doing
adversarial dynamics vs. adversarial states, when we only want to compute
gradients for one section of the augmented state vector. We also use this to
determine what the original, non-augmented state size is.
:param use_max_norm: if True, use Fast Gradient Sign Method (FGSM) to generate adversarial perturbations, else
use full gradient ascent
:param record_traj: if True, rollout dictionaries will contain qpos and qvel trajectories. This is useful for
plotting trajectories.
:param set_dynamics: if provided, the next rollout initializes the environment to the passed dynamics.
:param mask_augmentation: if True, don't augment the state (even though the environment augments the state with
the dynamics parameters, the policy will ignore these dimensions)
:return:
"""
Serializable.quick_init(self, locals())
assert isinstance(env_spec.action_space, Box)
obs_dim = env_spec.observation_space.flat_dim
action_dim = env_spec.action_space.flat_dim
# TODO: make a more elegant solution to this
# This is here because we assume the original, unaugmented state size is provided.
assert (zero_gradient_cutoff is not None)
# if we're ignoring state augmentation, modify observation size / network size accordingly
if mask_augmentation:
obs_dim = zero_gradient_cutoff
# create network
if mean_network is None:
mean_network = MLP(
input_shape=(obs_dim, ),
output_dim=action_dim,
hidden_sizes=hidden_sizes,
hidden_nonlinearity=hidden_nonlinearity,
output_nonlinearity=output_nonlinearity,
)
self._mean_network = mean_network
l_mean = mean_network.output_layer
obs_var = mean_network.input_layer.input_var
if std_network is not None:
l_log_std = std_network.output_layer
else:
if adaptive_std:
std_network = MLP(
input_shape=(obs_dim, ),
input_layer=mean_network.input_layer,
output_dim=action_dim,
hidden_sizes=std_hidden_sizes,
hidden_nonlinearity=std_hidden_nonlinearity,
output_nonlinearity=None,
)
l_log_std = std_network.output_layer
else:
l_log_std = ParamLayer(
mean_network.input_layer,
num_units=action_dim,
param=lasagne.init.Constant(np.log(init_std)),
name="output_log_std",
trainable=learn_std,
)
self.min_std = min_std
mean_var, log_std_var = L.get_output([l_mean, l_log_std])
if self.min_std is not None:
log_std_var = TT.maximum(log_std_var, np.log(min_std))
self._mean_var, self._log_std_var = mean_var, log_std_var
self._l_mean = l_mean
self._l_log_std = l_log_std
# take exponential for the actual standard dev
self._tru_std_var = TT.exp(self._log_std_var)
# take gradients of mean network, exponential of std network wrt L2 norm
self._mean_grad = theano.grad(self._mean_var.norm(2), obs_var)
self._std_grad = theano.grad(self._tru_std_var.norm(2),
obs_var,
disconnected_inputs='warn')
self._dist = dist_cls(action_dim)
LasagnePowered.__init__(self, [l_mean, l_log_std])
super(AdversarialPolicy, self).__init__(env_spec)
self._f_dist = ext.compile_function(
inputs=[obs_var],
outputs=[mean_var, log_std_var],
)
# function to get gradients
self._f_grad_dist = ext.compile_function(
inputs=[obs_var], outputs=[self._mean_grad, self._std_grad])
# initialize adversarial parameters
self.adversarial = adversarial
self.eps = eps
self.probability = probability
self.use_dynamics = use_dynamics
self.random = random
self.observable_noise = observable_noise
self.zero_gradient_cutoff = zero_gradient_cutoff
self.use_max_norm = use_max_norm
self.record_traj = record_traj
self.set_dynamics = set_dynamics
self.mask_augmentation = mask_augmentation
def __init__(
self,
input_shape,
output_dim,
prob_network=None,
hidden_sizes=(32, 32),
hidden_nonlinearity=NL.rectify,
optimizer=None,
use_trust_region=True,
step_size=0.01,
normalize_inputs=True,
name=None,
):
"""
:param input_shape: Shape of the input data.
:param output_dim: Dimension of output.
:param hidden_sizes: Number of hidden units of each layer of the mean network.
:param hidden_nonlinearity: Non-linearity used for each layer of the mean network.
:param optimizer: Optimizer for minimizing the negative log-likelihood.
:param use_trust_region: Whether to use trust region constraint.
:param step_size: KL divergence constraint for each iteration
"""
Serializable.quick_init(self, locals())
if optimizer is None:
if use_trust_region:
optimizer = PenaltyLbfgsOptimizer()
else:
optimizer = LbfgsOptimizer()
self.output_dim = output_dim
self._optimizer = optimizer
if prob_network is None:
prob_network = MLP(
input_shape=input_shape,
output_dim=output_dim,
hidden_sizes=hidden_sizes,
hidden_nonlinearity=hidden_nonlinearity,
output_nonlinearity=NL.softmax,
)
l_prob = prob_network.output_layer
LasagnePowered.__init__(self, [l_prob])
xs_var = prob_network.input_layer.input_var
ys_var = TT.imatrix("ys")
old_prob_var = TT.matrix("old_prob")
x_mean_var = theano.shared(
np.zeros((1,) + input_shape),
name="x_mean",
broadcastable=(True,) + (False, ) * len(input_shape)
)
x_std_var = theano.shared(
np.ones((1,) + input_shape),
name="x_std",
broadcastable=(True,) + (False, ) * len(input_shape)
)
normalized_xs_var = (xs_var - x_mean_var) / x_std_var
prob_var = L.get_output(l_prob, {prob_network.input_layer: normalized_xs_var})
old_info_vars = dict(prob=old_prob_var)
info_vars = dict(prob=prob_var)
dist = self._dist = Categorical(output_dim)
mean_kl = TT.mean(dist.kl_sym(old_info_vars, info_vars))
loss = - TT.mean(dist.log_likelihood_sym(ys_var, info_vars))
predicted = special.to_onehot_sym(TT.argmax(prob_var, axis=1), output_dim)
self._f_predict = ext.compile_function([xs_var], predicted)
self._f_prob = ext.compile_function([xs_var], prob_var)
self._l_prob = l_prob
optimizer_args = dict(
loss=loss,
target=self,
network_outputs=[prob_var],
)
if use_trust_region:
optimizer_args["leq_constraint"] = (mean_kl, step_size)
optimizer_args["inputs"] = [xs_var, ys_var, old_prob_var]
else:
optimizer_args["inputs"] = [xs_var, ys_var]
self._optimizer.update_opt(**optimizer_args)
self._use_trust_region = use_trust_region
self._name = name
self._normalize_inputs = normalize_inputs
self._x_mean_var = x_mean_var
self._x_std_var = x_std_var
def __init__(
self,
input_shape,
output_dim,
mean_network=None,
hidden_sizes=(32, 32),
hidden_nonlinearity=NL.rectify,
optimizer=None,
use_trust_region=True,
step_size=0.01,
learn_std=True,
init_std=1.0,
adaptive_std=False,
std_share_network=False,
std_hidden_sizes=(32, 32),
std_nonlinearity=None,
normalize_inputs=True,
normalize_outputs=True,
name=None,
):
"""
:param input_shape: Shape of the input data.
:param output_dim: Dimension of output.
:param hidden_sizes: Number of hidden units of each layer of the mean network.
:param hidden_nonlinearity: Non-linearity used for each layer of the mean network.
:param optimizer: Optimizer for minimizing the negative log-likelihood.
:param use_trust_region: Whether to use trust region constraint.
:param step_size: KL divergence constraint for each iteration
:param learn_std: Whether to learn the standard deviations. Only effective if adaptive_std is False. If
adaptive_std is True, this parameter is ignored, and the weights for the std network are always learned.
:param adaptive_std: Whether to make the std a function of the states.
:param std_share_network: Whether to use the same network as the mean.
:param std_hidden_sizes: Number of hidden units of each layer of the std network. Only used if
`std_share_network` is False. It defaults to the same architecture as the mean.
:param std_nonlinearity: Non-linearity used for each layer of the std network. Only used if `std_share_network`
is False. It defaults to the same non-linearity as the mean.
"""
Serializable.quick_init(self, locals())
if optimizer is None:
if use_trust_region:
optimizer = PenaltyLbfgsOptimizer()
else:
optimizer = LbfgsOptimizer()
self._optimizer = optimizer
if mean_network is None:
mean_network = MLP(
input_shape=input_shape,
output_dim=output_dim,
hidden_sizes=hidden_sizes,
hidden_nonlinearity=hidden_nonlinearity,
output_nonlinearity=None,
)
l_mean = mean_network.output_layer
if adaptive_std:
l_log_std = MLP(
input_shape=input_shape,
input_var=mean_network.input_layer.input_var,
output_dim=output_dim,
hidden_sizes=std_hidden_sizes,
hidden_nonlinearity=std_nonlinearity,
output_nonlinearity=None,
).output_layer
else:
l_log_std = ParamLayer(
mean_network.input_layer,
num_units=output_dim,
param=lasagne.init.Constant(np.log(init_std)),
name="output_log_std",
trainable=learn_std,
)
LasagnePowered.__init__(self, [l_mean, l_log_std])
xs_var = mean_network.input_layer.input_var
ys_var = TT.matrix("ys")
old_means_var = TT.matrix("old_means")
old_log_stds_var = TT.matrix("old_log_stds")
x_mean_var = theano.shared(np.zeros((1, ) + input_shape),
name="x_mean",
broadcastable=(True, ) +
(False, ) * len(input_shape))
x_std_var = theano.shared(np.ones((1, ) + input_shape),
name="x_std",
broadcastable=(True, ) +
(False, ) * len(input_shape))
y_mean_var = theano.shared(np.zeros((1, output_dim)),
name="y_mean",
broadcastable=(True, False))
y_std_var = theano.shared(np.ones((1, output_dim)),
name="y_std",
broadcastable=(True, False))
normalized_xs_var = (xs_var - x_mean_var) / x_std_var
normalized_ys_var = (ys_var - y_mean_var) / y_std_var
normalized_means_var = L.get_output(
l_mean, {mean_network.input_layer: normalized_xs_var})
normalized_log_stds_var = L.get_output(
l_log_std, {mean_network.input_layer: normalized_xs_var})
means_var = normalized_means_var * y_std_var + y_mean_var
log_stds_var = normalized_log_stds_var + TT.log(y_std_var)
normalized_old_means_var = (old_means_var - y_mean_var) / y_std_var
normalized_old_log_stds_var = old_log_stds_var - TT.log(y_std_var)
dist = self._dist = DiagonalGaussian()
normalized_dist_info_vars = dict(mean=normalized_means_var,
log_std=normalized_log_stds_var)
mean_kl = TT.mean(
dist.kl_sym(
dict(mean=normalized_old_means_var,
log_std=normalized_old_log_stds_var),
normalized_dist_info_vars,
))
loss = -TT.mean(
dist.log_likelihood_sym(normalized_ys_var,
normalized_dist_info_vars))
self._f_predict = compile_function([xs_var], means_var)
self._f_pdists = compile_function([xs_var], [means_var, log_stds_var])
self._l_mean = l_mean
self._l_log_std = l_log_std
optimizer_args = dict(
loss=loss,
target=self,
network_outputs=[normalized_means_var, normalized_log_stds_var],
)
if use_trust_region:
optimizer_args["leq_constraint"] = (mean_kl, step_size)
optimizer_args["inputs"] = [
xs_var, ys_var, old_means_var, old_log_stds_var
]
else:
optimizer_args["inputs"] = [xs_var, ys_var]
self._optimizer.update_opt(**optimizer_args)
self._use_trust_region = use_trust_region
self._name = name
self._normalize_inputs = normalize_inputs
self._normalize_outputs = normalize_outputs
self._x_mean_var = x_mean_var
self._x_std_var = x_std_var
self._y_mean_var = y_mean_var
self._y_std_var = y_std_var
def __init__(
self,
env_spec,
hidden_sizes=(32, 32),
learn_std=True,
init_std=1.0,
adaptive_std=False,
std_share_network=False,
std_hidden_sizes=(32, 32),
min_std=1e-6,
std_hidden_nonlinearity=NL.tanh,
hidden_nonlinearity=NL.tanh,
output_nonlinearity=None,
mean_network=None,
std_network=None,
dist_cls=DiagonalGaussian,
):
"""
:param env_spec:
:param hidden_sizes: list of sizes for the fully-connected hidden layers
:param learn_std: Is std trainable
:param init_std: Initial std
:param adaptive_std:
:param std_share_network:
:param std_hidden_sizes: list of sizes for the fully-connected layers for std
:param min_std: whether to make sure that the std is at least some threshold value, to avoid numerical issues
:param std_hidden_nonlinearity:
:param hidden_nonlinearity: nonlinearity used for each hidden layer
:param output_nonlinearity: nonlinearity for the output layer
:param mean_network: custom network for the output mean
:param std_network: custom network for the output log std
:return:
"""
Serializable.quick_init(self, locals())
assert isinstance(env_spec.action_space, Discrete)
#obs_dim = env_spec.observation_space.flat_dim
obs_dim = 6400
action_dim = env_spec.action_space.flat_dim
# create network
if mean_network is None:
mean_network = MLP(
input_shape=(obs_dim,),
output_dim=action_dim,
hidden_sizes=hidden_sizes,
hidden_nonlinearity=hidden_nonlinearity,
output_nonlinearity=output_nonlinearity,
)
self._mean_network = mean_network
l_mean = mean_network.output_layer
obs_var = mean_network.input_layer.input_var
if std_network is not None:
l_log_std = std_network.output_layer
else:
if adaptive_std:
std_network = MLP(
input_shape=(obs_dim,),
input_layer=mean_network.input_layer,
output_dim=action_dim,
hidden_sizes=std_hidden_sizes,
hidden_nonlinearity=std_hidden_nonlinearity,
output_nonlinearity=None,
)
l_log_std = std_network.output_layer
else:
l_log_std = ParamLayer(
mean_network.input_layer,
num_units=action_dim,
param=lasagne.init.Constant(np.log(init_std)),
name="output_log_std",
trainable=learn_std,
)
self.min_std = min_std
mean_var, log_std_var = L.get_output([l_mean, l_log_std])
if self.min_std is not None:
log_std_var = TT.maximum(log_std_var, np.log(min_std))
self._mean_var, self._log_std_var = mean_var, log_std_var
self._l_mean = l_mean
self._l_log_std = l_log_std
self._dist = dist_cls(action_dim)
LasagnePowered.__init__(self, [l_mean, l_log_std])
super(GaussianMLPPolicy, self).__init__(env_spec)
self._f_dist = ext.compile_function(
inputs=[obs_var],
outputs=[mean_var, log_std_var],
)
def __init__(
self,
env,
obs_net_params,
name,
fusion_net_params=None,
obs_indx=None,
obs_shapes=None,
action_dims=None,
learn_std=True,
init_std=1.0,
adaptive_std=False,
std_net_parameters=None,
std_fusion_net_params=None,
std_share_network=False,
min_std=1e-6,
mean_network=None,
std_network=None,
use_flat_obs=True,
dist_cls=DiagonalGaussian
):
"""
:param env:
:param obs_net_params: (list of dict) parameters for the observation networks
:param name: (str) name is essential and should be consistent everywhere. Policy uses it to access relevant data
:param fusion_net_params: (dict) parameters of the fusion network. If single observation type is used you could set it None
:param obs_indx: (list of int) if obs is provided as tuple, which indices in tuple to use. If None is given tries to use all indices
:param obs_shapes: (list of tuples of int) observation shapes for manual assignment (in case some other observations might be used)
:param action_dims: (list of int or just int) number of actions, If None is provided - env actions are used. Providing a list of action dims allows also have different nonlinearities for every subset of actions
:param std_net_parameters: (dict) parameters for the std network
:param learn_std: Is std trainable (does not need std network parameters)
:param init_std: Initial std
:param adaptive_std: (bool) should std to be learnable. If True specify std_network_parameters
:param std_share_network:
:param min_std: whether to make sure that the std is at least some threshold value, to avoid numerical issues
:param mean_network: custom network for the output mean
:param use_flat_obs: if set then one must provide observations in flat form even if they are images (insde they are reshaped). For some reason it breaks if they are not flat, so use True for now
:param std_network: custom network for the output log std
:return:
"""
self.env_observation_space = copy.deepcopy(env.observation_space)
self.name = name
self.obs_indx = obs_indx
# Update observation indices and shapes
self.obs_shapes = self.checkListOfTuples(obs_shapes)
self.use_flat_obs = use_flat_obs
Serializable.quick_init(self, locals())
assert isinstance(env.action_space, Box)
# If not specified - use action space of the environment
pf.print_sec0('MULTIOBSERVATION POLICY:')
if action_dims is None:
assert env is not None, "ERROR: getNetwork(): Either provide env or output_dim"
action_dims = np.prod(env.action_space.shape)
# create network
if mean_network is None:
mean_network = self.getNetwork(obs_net_params=obs_net_params,
fusion_net_params=fusion_net_params,
obs_shapes=self.obs_shapes,
output_dim=action_dims,
name=name + '_mean_net',
use_flat_obs=self.use_flat_obs,
env=env)
## Typical parameters
# hidden_sizes=(32, 32),
# hidden_nonlinearity=NL.tanh,
# output_nonlinearity=None,
self._mean_network = mean_network
l_mean = mean_network.output_layer
self.input_vars = []
for layer in mean_network.input_layers:
self.input_vars.append(layer.input_var)
if std_network is not None:
l_log_std = std_network.output_layer
else:
if adaptive_std:
std_network = self.getNetwork(obs_net_params=std_net_parameters,
fusion_net_params=std_fusion_net_params,
obs_layers=mean_network.input_layers,
output_dim=action_dims,
env=env,
use_flat_obs=self.use_flat_obs,
name=name + '_std_net')
## Typical parameters:
# input_shape=(obs_dim,)
# std_hidden_sizes = (32,32)
# std_hidden_nonlinearity = NL.tanh
# output_nonlinearity=None
l_log_std = std_network.output_layer
else:
action_nums = np.sum(action_dims)
l_log_std = ParamMultiInLayer(
mean_network.input_layers,
num_units=action_nums,
param=lasagne.init.Constant(np.log(init_std)),
name="output_log_std",
trainable=learn_std,
)
self._std_network = std_network
self.min_std = min_std
mean_var, log_std_var = L.get_output([l_mean, l_log_std])
if self.min_std is not None:
log_std_var = TT.maximum(log_std_var, np.log(min_std))
self._mean_var, self._log_std_var = mean_var, log_std_var
self._l_mean = l_mean
self._l_log_std = l_log_std
self._dist = dist_cls(action_dims)
LasagnePowered.__init__(self, [l_mean, l_log_std])
super(GaussianMultiObsPolicy, self).__init__(env)
self._f_dist = ext.compile_function(
inputs=self.input_vars,
outputs=[mean_var, log_std_var],
)
def run_task(vv, log_dir=None, exp_name=None):
global policy
global baseline
trpo_stepsize = 0.01
trpo_subsample_factor = 0.2
# Check if variant is available
if vv['model_type'] not in ['BrushTireModel', 'LinearTireModel']:
raise ValueError('Unrecognized model type for simulating robot')
if vv['robot_type'] not in ['MRZR', 'RCCar']:
raise ValueError('Unrecognized robot type')
# Load environment
if not vv['use_ros']:
env = CircleEnv(target_velocity=vv['target_velocity'],
radius=vv['radius'],
dt=vv['dt'],
model_type=vv['model_type'],
robot_type=vv['robot_type'])
else:
from aa_simulation.envs.circle.circle_env_ros import CircleEnvROS
env = CircleEnvROS(target_velocity=vv['target_velocity'],
radius=vv['radius'],
dt=vv['dt'],
model_type=vv['model_type'],
robot_type=vv['robot_type'])
# Save variant information for comparison plots
variant_file = logger.get_snapshot_dir() + '/variant.json'
logger.log_variant(variant_file, vv)
# Set variance for each action component separately for exploration
# Note: We set the variance manually because we are not scaling our
# action space during training.
init_std_speed = vv['target_velocity'] / 4
init_std_steer = np.pi / 6
init_std = [init_std_speed, init_std_steer]
# Build policy and baseline networks
# Note: Mean of policy network set to analytically computed values for
# faster training (rough estimates for RL to fine-tune).
if policy is None or baseline is None:
wheelbase = 0.257
target_velocity = vv['target_velocity']
target_steering = np.arctan(wheelbase / vv['radius']) # CCW
output_mean = np.array([target_velocity, target_steering])
hidden_sizes = (32, 32)
# In mean network, allow output b values to dominate final output
# value by constraining the magnitude of the output W matrix. This is
# to allow faster learning. These numbers are arbitrarily chosen.
W_gain = min(vv['target_velocity'] / 5, np.pi / 15)
mean_network = MLP(input_shape=(env.spec.observation_space.flat_dim, ),
output_dim=env.spec.action_space.flat_dim,
hidden_sizes=hidden_sizes,
hidden_nonlinearity=LN.tanh,
output_nonlinearity=None,
output_W_init=LI.GlorotUniform(gain=W_gain),
output_b_init=output_mean)
policy = GaussianMLPPolicy(env_spec=env.spec,
hidden_sizes=hidden_sizes,
init_std=init_std,
mean_network=mean_network)
baseline = LinearFeatureBaseline(env_spec=env.spec,
target_key='returns')
# Reset variance to re-enable exploration when using pre-trained networks
else:
policy._l_log_std = ParamLayer(
policy._mean_network.input_layer,
num_units=env.spec.action_space.flat_dim,
param=LI.Constant(np.log(init_std)),
name='output_log_std',
trainable=True)
obs_var = policy._mean_network.input_layer.input_var
mean_var, log_std_var = L.get_output(
[policy._l_mean, policy._l_log_std])
policy._log_std_var = log_std_var
LasagnePowered.__init__(policy, [policy._l_mean, policy._l_log_std])
policy._f_dist = ext.compile_function(inputs=[obs_var],
outputs=[mean_var, log_std_var])
safety_baseline = LinearFeatureBaseline(env_spec=env.spec,
target_key='safety_returns')
safety_constraint = CircleSafetyConstraint(max_value=1.0,
eps=vv['eps'],
baseline=safety_baseline)
if vv['algo'] == 'TRPO':
algo = TRPO(
env=env,
policy=policy,
baseline=baseline,
batch_size=600,
max_path_length=env.horizon,
n_itr=600,
discount=0.99,
step_size=trpo_stepsize,
plot=False,
)
else:
algo = CPO(env=env,
policy=policy,
baseline=baseline,
safety_constraint=safety_constraint,
batch_size=600,
max_path_length=env.horizon,
n_itr=600,
discount=0.99,
step_size=trpo_stepsize,
gae_lambda=0.95,
safety_gae_lambda=1,
optimizer_args={'subsample_factor': trpo_subsample_factor},
plot=False)
algo.train()
def __init__(
self,
input_shape,
output_dim,
predict_all=False,
hidden_sizes=(32, 32),
hidden_nonlinearity=NL.rectify,
optimizer=None,
use_trust_region=True,
step_size=0.01,
normalize_inputs=True,
name=None,
):
"""
:param input_shape: Shape of the input data.
:param output_dim: Dimension of output.
:param predict_all: use the prediction made at every step about the latent variables (not only the last step)
:param hidden_sizes: Number of hidden units of each layer of the mean network.
:param hidden_nonlinearity: Non-linearity used for each layer of the mean network.
:param optimizer: Optimizer for minimizing the negative log-likelihood.
:param use_trust_region: Whether to use trust region constraint.
:param step_size: KL divergence constraint for each iteration
"""
Serializable.quick_init(self, locals())
if optimizer is None:
if use_trust_region:
optimizer = PenaltyLbfgsOptimizer()
else:
optimizer = LbfgsOptimizer()
self.output_dim = output_dim
self._optimizer = optimizer
p_network = GRUNetwork(
input_shape=input_shape,
output_dim=output_dim,
hidden_dim=hidden_sizes[0],
hidden_nonlinearity=hidden_nonlinearity,
output_nonlinearity=NL.sigmoid,
)
l_p = p_network.output_layer # this is every intermediate latent state! but I only care about last
LasagnePowered.__init__(self, [l_p])
xs_var = p_network.input_layer.input_var
ys_var = TT.itensor3("ys") # this is 3D: (traj, time, lat_dim)
old_p_var = TT.tensor3("old_p")
x_mean_var = theano.shared(np.zeros((
1,
1,
) + input_shape),
name="x_mean",
broadcastable=(
True,
True,
) + (False, ) * len(input_shape))
x_std_var = theano.shared(np.ones((
1,
1,
) + input_shape),
name="x_std",
broadcastable=(
True,
True,
) + (False, ) * len(input_shape))
normalized_xs_var = (xs_var - x_mean_var) / x_std_var
# this is the previous p_var, from which I only want the last time-step padded along all time-steps
p_var_all = L.get_output(l_p,
{p_network.input_layer: normalized_xs_var})
# take only last dim but keep the shape
p_var_last = TT.reshape(
p_var_all[:, -1, :],
(TT.shape(p_var_all)[0], 1, TT.shape(p_var_all)[2]))
# padd along the time dimension to obtain the same shape as before
padded_p = TT.tile(p_var_last, (1, TT.shape(p_var_all)[1], 1))
# give it the standard name
if predict_all:
p_var = p_var_all
else:
p_var = padded_p
old_info_vars = dict(p=old_p_var)
info_vars = dict(
p=p_var
) # posterior of the latent at every step, wrt obs-act. Same along batch if recurrent
dist = self._dist = Bernoulli(output_dim)
mean_kl = TT.mean(dist.kl_sym(old_info_vars, info_vars))
loss = -TT.mean(dist.log_likelihood_sym(
ys_var,
info_vars)) # regressor just wants to min -loglik of data ys
predicted = p_var >= 0.5
self._f_predict = ext.compile_function([xs_var], predicted)
self._f_p = ext.compile_function(
[xs_var], p_var
) # for consistency with gauss_mlp_reg this should be ._f_pdists
self._l_p = l_p
optimizer_args = dict(
loss=loss,
target=self,
network_outputs=[p_var],
)
if use_trust_region:
optimizer_args["leq_constraint"] = (mean_kl, step_size)
optimizer_args["inputs"] = [xs_var, ys_var, old_p_var]
else:
optimizer_args["inputs"] = [xs_var, ys_var]
self._optimizer.update_opt(**optimizer_args)
self._use_trust_region = use_trust_region
self._name = name
self._normalize_inputs = normalize_inputs
self._x_mean_var = x_mean_var
self._x_std_var = x_std_var
def __init__(
self,
input_shape,
output_dim,
prob_network=None,
hidden_sizes=(32, 32),
hidden_nonlinearity=NL.rectify,
optimizer=None,
use_trust_region=True,
step_size=0.01,
normalize_inputs=True,
name=None,
):
"""
:param input_shape: Shape of the input data.
:param output_dim: Dimension of output.
:param hidden_sizes: Number of hidden units of each layer of the mean network.
:param hidden_nonlinearity: Non-linearity used for each layer of the mean network.
:param optimizer: Optimizer for minimizing the negative log-likelihood.
:param use_trust_region: Whether to use trust region constraint.
:param step_size: KL divergence constraint for each iteration
"""
Serializable.quick_init(self, locals())
if optimizer is None:
if use_trust_region:
optimizer = PenaltyLbfgsOptimizer()
else:
optimizer = LbfgsOptimizer()
self.output_dim = output_dim
self._optimizer = optimizer
if prob_network is None:
prob_network = MLP(
input_shape=input_shape,
output_dim=output_dim,
hidden_sizes=hidden_sizes,
hidden_nonlinearity=hidden_nonlinearity,
output_nonlinearity=NL.softmax,
)
l_prob = prob_network.output_layer
LasagnePowered.__init__(self, [l_prob])
xs_var = prob_network.input_layer.input_var
ys_var = TT.imatrix("ys")
old_prob_var = TT.matrix("old_prob")
x_mean_var = theano.shared(
np.zeros((1,) + input_shape),
name="x_mean",
broadcastable=(True,) + (False,) * len(input_shape)
)
x_std_var = theano.shared(
np.ones((1,) + input_shape),
name="x_std",
broadcastable=(True,) + (False,) * len(input_shape)
)
normalized_xs_var = (xs_var - x_mean_var) / x_std_var
prob_var = L.get_output(l_prob, {prob_network.input_layer: normalized_xs_var})
old_info_vars = dict(prob=old_prob_var)
info_vars = dict(prob=prob_var)
dist = self._dist = Categorical(output_dim)
mean_kl = TT.mean(dist.kl_sym(old_info_vars, info_vars))
loss = - TT.mean(dist.log_likelihood_sym(ys_var, info_vars))
predicted = special.to_onehot_sym(TT.argmax(prob_var, axis=1), output_dim)
self._f_predict = ext.compile_function([xs_var], predicted)
self._f_prob = ext.compile_function([xs_var], prob_var)
self._prob_network = prob_network
self._l_prob = l_prob
optimizer_args = dict(
loss=loss,
target=self,
network_outputs=[prob_var],
)
if use_trust_region:
optimizer_args["leq_constraint"] = (mean_kl, step_size)
optimizer_args["inputs"] = [xs_var, ys_var, old_prob_var]
else:
optimizer_args["inputs"] = [xs_var, ys_var]
self._optimizer.update_opt(**optimizer_args)
self._use_trust_region = use_trust_region
self._name = name
self._normalize_inputs = normalize_inputs
self._x_mean_var = x_mean_var
self._x_std_var = x_std_var
def __init__(
self,
env_spec,
hidden_sizes=(32, ),
state_include_action=True,
hidden_nonlinearity=NL.tanh,
learn_std=True,
init_std=1.0,
output_nonlinearity=None,
):
"""
:param env_spec: A spec for the env.
:param hidden_sizes: list of sizes for the fully connected hidden layers
:param hidden_nonlinearity: nonlinearity used for each hidden layer
:return:
"""
Serializable.quick_init(self, locals())
super(GaussianGRUPolicy, self).__init__(env_spec)
assert len(hidden_sizes) == 1
if state_include_action:
obs_dim = env_spec.observation_space.flat_dim + env_spec.action_space.flat_dim
else:
obs_dim = env_spec.observation_space.flat_dim
action_dim = env_spec.action_space.flat_dim
mean_network = GRUNetwork(
input_shape=(obs_dim, ),
output_dim=action_dim,
hidden_dim=hidden_sizes[0],
hidden_nonlinearity=hidden_nonlinearity,
output_nonlinearity=output_nonlinearity,
)
l_mean = mean_network.output_layer
obs_var = mean_network.input_var
l_log_std = ParamLayer(
mean_network.input_layer,
num_units=action_dim,
param=lasagne.init.Constant(np.log(init_std)),
name="output_log_std",
trainable=learn_std,
)
l_step_log_std = ParamLayer(
mean_network.step_input_layer,
num_units=action_dim,
param=l_log_std.param,
name="step_output_log_std",
trainable=learn_std,
)
self._mean_network = mean_network
self._l_log_std = l_log_std
self._state_include_action = state_include_action
self._f_step_mean_std = ext.compile_function(
[
mean_network.step_input_layer.input_var,
mean_network.step_prev_hidden_layer.input_var
],
L.get_output([
mean_network.step_output_layer, l_step_log_std,
mean_network.step_hidden_layer
]))
self._prev_action = None
self._prev_hidden = None
self._hidden_sizes = hidden_sizes
self._dist = RecurrentDiagonalGaussian(action_dim)
self.reset()
self.set_greedy(False)
LasagnePowered.__init__(self, [mean_network.output_layer, l_log_std])
def __init__(
self,
disc_window,
disc_joints_dim,
iteration,
a_max=0.7,
a_min=0.0,
batch_size = 64,
iter_per_train = 10,
decent_portion=0.8,
hidden_sizes=(32, 32),
hidden_nonlinearity=NL.tanh,
output_nonlinearity=NL.tanh,
disc_network=None,
):
self.batch_size=64
self.iter_per_train=10
self.disc_window = disc_window
self.disc_joints_dim = disc_joints_dim
self.disc_dim = self.disc_window*self.disc_joints_dim
self.end_iter = int(iteration*decent_portion)
self.iter_count = 0
out_dim = 1
target_var = TT.ivector('targets')
# create network
if disc_network is None:
disc_network = MLP(
input_shape=(self.disc_dim,),
output_dim=out_dim,
hidden_sizes=hidden_sizes,
hidden_nonlinearity=hidden_nonlinearity,
output_nonlinearity=output_nonlinearity,
)
self._disc_network = disc_network
disc_reward = disc_network.output_layer
obs_var = disc_network.input_layer.input_var
disc_var, = L.get_output([disc_reward])
self._disc_var = disc_var
LasagnePowered.__init__(self, [disc_reward])
self._f_disc = ext.compile_function(
inputs=[obs_var],
outputs=[disc_var],
log_name="f_discriminate_forward",
)
params = L.get_all_params(disc_network, trainable=True)
loss = lasagne.objectives.categorical_crossentropy(disc_var, target_var).mean()
updates = lasagne.updates.adam(loss, params, learning_rate=0.01)
self._f_disc_train = ext.compile_function(
inputs=[obs_var, target_var],
outputs=[loss],
updates=updates,
log_name="f_discriminate_train"
)
self.data = self.load_data()
self.a = np.linspace(a_min, a_max, self.end_iter)
def __init__(
self,
env_spec,
hidden_sizes=(32, 32),
learn_std=True,
init_std=1.0,
adaptive_std=False,
std_share_network=False,
std_hidden_sizes=(32, 32),
min_std=1e-6,
std_hidden_nonlinearity=NL.tanh,
hidden_nonlinearity=NL.tanh,
output_nonlinearity=None,
mean_network=None,
std_network=None,
split_masks=None,
dist_cls=DiagonalGaussian,
mp_dim=0,
mp_sel_hid_dim=0,
mp_sel_num=0,
mp_projection_dim=2,
net_mode=0, # 0: vanilla, 1: append mp to second layer, 2: project mp to lower space, 3: mp selection blending, 4: mp selection discrete
split_init_net=None,
split_units=None,
wc_net_path=None,
learn_segment=False,
split_num=1,
split_layer=[0],
split_std=False,
task_id=0,
):
"""
:param env_spec:
:param hidden_sizes: list of sizes for the fully-connected hidden layers
:param learn_std: Is std trainable
:param init_std: Initial std
:param adaptive_std:
:param std_share_network:
:param std_hidden_sizes: list of sizes for the fully-connected layers for std
:param min_std: whether to make sure that the std is at least some threshold value, to avoid numerical issues
:param std_hidden_nonlinearity:
:param hidden_nonlinearity: nonlinearity used for each hidden layer
:param output_nonlinearity: nonlinearity for the output layer
:param mean_network: custom network for the output mean
:param std_network: custom network for the output log std
:return:
"""
Serializable.quick_init(self, locals())
assert isinstance(env_spec.action_space, Box)
obs_dim = env_spec.observation_space.flat_dim
action_dim = env_spec.action_space.flat_dim
# create network
if mean_network is None:
if net_mode == 1:
mean_network = MLPAppend(
input_shape=(obs_dim, ),
output_dim=action_dim,
hidden_sizes=hidden_sizes,
hidden_nonlinearity=hidden_nonlinearity,
output_nonlinearity=output_nonlinearity,
append_dim=mp_dim,
)
elif net_mode == 2:
mean_network = MLP_PROJ(
input_shape=(obs_dim, ),
output_dim=action_dim,
hidden_sizes=hidden_sizes,
hidden_nonlinearity=hidden_nonlinearity,
output_nonlinearity=output_nonlinearity,
mp_dim=mp_dim,
mp_hid_dim=16,
mp_proj_dim=mp_projection_dim,
)
elif net_mode == 3:
mean_network = MLP_PS(
input_shape=(obs_dim, ),
output_dim=action_dim,
hidden_sizes=hidden_sizes,
hidden_nonlinearity=hidden_nonlinearity,
output_nonlinearity=output_nonlinearity,
mp_dim=mp_dim,
mp_sel_hid_dim=mp_sel_hid_dim,
mp_sel_num=mp_sel_num,
)
elif net_mode == 4:
wc_net = joblib.load(wc_net_path)
mean_network = MLP_PSD(
input_shape=(obs_dim, ),
output_dim=action_dim,
hidden_sizes=hidden_sizes,
hidden_nonlinearity=hidden_nonlinearity,
output_nonlinearity=output_nonlinearity,
mp_dim=mp_dim,
mp_sel_hid_dim=mp_sel_hid_dim,
mp_sel_num=mp_sel_num,
wc_net=wc_net,
learn_segment=learn_segment,
)
elif net_mode == 5:
mean_network = MLP_Split(
input_shape=(obs_dim, ),
output_dim=action_dim,
hidden_sizes=hidden_sizes,
hidden_nonlinearity=hidden_nonlinearity,
output_nonlinearity=output_nonlinearity,
split_layer=split_layer,
split_num=split_num,
)
elif net_mode == 6:
mean_network = MLP_SplitAct(
input_shape=(obs_dim, ),
output_dim=action_dim,
hidden_sizes=hidden_sizes,
hidden_nonlinearity=hidden_nonlinearity,
output_nonlinearity=output_nonlinearity,
split_num=split_num,
split_units=split_units,
init_net=split_init_net._mean_network,
)
elif net_mode == 7:
mean_network = MLP_SoftSplit(
input_shape=(obs_dim, ),
output_dim=action_dim,
hidden_sizes=hidden_sizes,
hidden_nonlinearity=hidden_nonlinearity,
output_nonlinearity=output_nonlinearity,
split_num=split_num,
init_net=split_init_net._mean_network,
)
elif net_mode == 8:
mean_network = MLP_MaskedSplit(
input_shape=(obs_dim, ),
output_dim=action_dim,
hidden_sizes=hidden_sizes,
hidden_nonlinearity=hidden_nonlinearity,
output_nonlinearity=output_nonlinearity,
split_num=split_num,
split_masks=split_masks,
init_net=split_init_net._mean_network,
)
elif net_mode == 9:
mean_network = MLP_MaskedSplitCont(
input_shape=(obs_dim, ),
output_dim=action_dim,
hidden_sizes=hidden_sizes,
hidden_nonlinearity=hidden_nonlinearity,
output_nonlinearity=output_nonlinearity,
task_id=task_id,
init_net=split_init_net._mean_network,
)
else:
mean_network = MLP(
input_shape=(obs_dim, ),
output_dim=action_dim,
hidden_sizes=hidden_sizes,
hidden_nonlinearity=hidden_nonlinearity,
output_nonlinearity=output_nonlinearity,
)
self._mean_network = mean_network
l_mean = mean_network.output_layer
obs_var = mean_network.input_layer.input_var
if std_network is not None:
l_log_std = std_network.output_layer
else:
if adaptive_std:
std_network = MLP(
input_shape=(obs_dim, ),
input_layer=mean_network.input_layer,
output_dim=action_dim,
hidden_sizes=std_hidden_sizes,
hidden_nonlinearity=std_hidden_nonlinearity,
output_nonlinearity=None,
)
l_log_std = std_network.output_layer
else:
if net_mode != 8 or not split_std:
l_log_std = ParamLayer(
mean_network.input_layer,
num_units=action_dim,
param=lasagne.init.Constant(np.log(init_std)),
name="output_log_std",
trainable=learn_std,
)
else:
l_log_std = ParamLayerSplit(
mean_network.input_layer,
num_units=action_dim,
param=lasagne.init.Constant(np.log(init_std)),
name="output_log_std",
trainable=learn_std,
split_num=split_num,
init_param=split_init_net.get_params()[-1])
if net_mode == 6 or net_mode == 7 or (net_mode == 8
and not split_std):
l_log_std.get_params()[0].set_value(
split_init_net.get_params()[-1].get_value())
if net_mode == 9:
l_log_std.get_params()[0].set_value(
split_init_net.get_params()[-1].get_value() + 0.5)
self.min_std = min_std
mean_var, log_std_var = L.get_output([l_mean, l_log_std])
if self.min_std is not None:
log_std_var = TT.maximum(log_std_var, np.log(min_std))
self._mean_var, self._log_std_var = mean_var, log_std_var
self._l_mean = l_mean
self._l_log_std = l_log_std
self._dist = dist_cls(action_dim)
LasagnePowered.__init__(self, [l_mean, l_log_std])
super(GaussianMLPPolicy, self).__init__(env_spec)
self._f_dist = ext.compile_function(
inputs=[obs_var],
outputs=[mean_var, log_std_var],
)
if net_mode == 3 or net_mode == 4:
self._f_blendweight = ext.compile_function(
inputs=[obs_var], outputs=[self._mean_network._blend_weights])
entropy = -TT.mean(self._mean_network._blend_weights *
TT.log(self._mean_network._blend_weights))
self._f_weightentropy = ext.compile_function(inputs=[obs_var],
outputs=[entropy])
avg_weights = TT.mean(self._mean_network._blend_weights, axis=0)
entropy2 = -TT.mean(avg_weights * TT.log(avg_weights))
self._f_choiceentropy = ext.compile_function(inputs=[obs_var],
outputs=[entropy2])
def __init__(
self,
env_spec,
hidden_sizes=(32,),
state_include_action=True,
hidden_nonlinearity=NL.tanh,
learn_std=True,
init_std=1.0,
output_nonlinearity=None,
):
"""
:param env_spec: A spec for the env.
:param hidden_sizes: list of sizes for the fully connected hidden layers
:param hidden_nonlinearity: nonlinearity used for each hidden layer
:return:
"""
Serializable.quick_init(self, locals())
super(GaussianGRUPolicy, self).__init__(env_spec)
assert len(hidden_sizes) == 1
if state_include_action:
obs_dim = env_spec.observation_space.flat_dim + env_spec.action_space.flat_dim
else:
obs_dim = env_spec.observation_space.flat_dim
action_dim = env_spec.action_space.flat_dim
mean_network = GRUNetwork(
input_shape=(obs_dim,),
output_dim=action_dim,
hidden_dim=hidden_sizes[0],
hidden_nonlinearity=hidden_nonlinearity,
output_nonlinearity=NL.softmax,
)
l_mean = mean_network.output_layer
obs_var = mean_network.input_var
l_log_std = ParamLayer(
mean_network.input_layer,
num_units=action_dim,
param=lasagne.init.Constant(np.log(init_std)),
name="output_log_std",
trainable=learn_std,
)
l_step_log_std = ParamLayer(
mean_network.step_input_layer,
num_units=action_dim,
param=l_log_std.param,
name="step_output_log_std",
trainable=learn_std,
)
self._mean_network = mean_network
self._l_log_std = l_log_std
self._state_include_action = state_include_action
self._f_step_mean_std = ext.compile_function(
[
mean_network.step_input_layer.input_var,
mean_network.step_prev_hidden_layer.input_var
],
L.get_output([
mean_network.step_output_layer,
l_step_log_std,
mean_network.step_hidden_layer
])
)
self._prev_action = None
self._prev_hidden = None
self._hidden_sizes = hidden_sizes
self._dist = RecurrentDiagonalGaussian(action_dim)
self.reset()
LasagnePowered.__init__(self, [mean_network.output_layer, l_log_std])
def __init__(
self,
name,
input_shape,
output_dim,
hidden_sizes,
conv_filters,conv_filter_sizes,conv_strides,conv_pads,
hidden_nonlinearity=NL.rectify,
mean_network=None,
optimizer=None,
use_trust_region=True,
step_size=0.01,
subsample_factor=1.0,
batchsize=None,
learn_std=True,
init_std=1.0,
adaptive_std=False,
std_share_network=False,
std_conv_filters=[],std_conv_filters_sizes=[],std_conv_strides=[],std_conv_pads=[],
std_hidden_sizes=(32, 32),
std_nonlinearity=None,
normalize_inputs=True,
normalize_outputs=True,
):
"""
:param input_shape: usually for images of the form (width,height,channel)
:param output_dim: Dimension of output.
:param hidden_sizes: Number of hidden units of each layer of the mean network.
:param hidden_nonlinearity: Non-linearity used for each layer of the mean network.
:param optimizer: Optimizer for minimizing the negative log-likelihood.
:param use_trust_region: Whether to use trust region constraint.
:param step_size: KL divergence constraint for each iteration
:param learn_std: Whether to learn the standard deviations. Only effective if adaptive_std is False. If
adaptive_std is True, this parameter is ignored, and the weights for the std network are always learned.
:param adaptive_std: Whether to make the std a function of the states.
:param std_share_network: Whether to use the same network as the mean.
:param std_hidden_sizes: Number of hidden units of each layer of the std network. Only used if
`std_share_network` is False. It defaults to the same architecture as the mean.
:param std_nonlinearity: Non-linearity used for each layer of the std network. Only used if `std_share_network`
is False. It defaults to the same non-linearity as the mean.
"""
Serializable.quick_init(self, locals())
if optimizer is None:
if use_trust_region:
optimizer = PenaltyLbfgsOptimizer("optimizer")
else:
optimizer = LbfgsOptimizer("optimizer")
self._optimizer = optimizer
self.input_shape = input_shape
if mean_network is None:
mean_network = ConvNetwork(
name="mean_network",
input_shape=input_shape,
output_dim=output_dim,
conv_filters=conv_filters,
conv_filter_sizes=conv_filter_sizes,
conv_strides=conv_strides,
conv_pads=conv_pads,
hidden_sizes=hidden_sizes,
hidden_nonlinearity=hidden_nonlinearity,
output_nonlinearity=None,
)
l_mean = mean_network.output_layer
if adaptive_std:
l_log_std = ConvNetwork(
name="log_std_network",
input_shape=input_shape,
input_var=mean_network.input_layer.input_var,
output_dim=output_dim,
conv_filters=std_conv_filters,
conv_filter_sizes=std_conv_filter_sizes,
conv_strides=std_conv_strides,
conv_pads=std_conv_pads,
hidden_sizes=std_hidden_sizes,
hidden_nonlinearity=std_nonlinearity,
output_nonlinearity=None,
).output_layer
else:
l_log_std = ParamLayer(
mean_network.input_layer,
num_units=output_dim,
param=lasagne.init.Constant(np.log(init_std)),
name="output_log_std",
trainable=learn_std,
)
LasagnePowered.__init__(self, [l_mean, l_log_std])
xs_var = mean_network.input_layer.input_var
ys_var = TT.matrix("ys")
old_means_var = TT.matrix("old_means")
old_log_stds_var = TT.matrix("old_log_stds")
x_mean_var = theano.shared(
np.zeros((1,np.prod(input_shape)), dtype=theano.config.floatX),
name="x_mean",
broadcastable=(True,False),
)
x_std_var = theano.shared(
np.ones((1,np.prod(input_shape)), dtype=theano.config.floatX),
name="x_std",
broadcastable=(True,False),
)
y_mean_var = theano.shared(
np.zeros((1, output_dim), dtype=theano.config.floatX),
name="y_mean",
broadcastable=(True, False)
)
y_std_var = theano.shared(
np.ones((1, output_dim), dtype=theano.config.floatX),
name="y_std",
broadcastable=(True, False)
)
normalized_xs_var = (xs_var - x_mean_var) / x_std_var
normalized_ys_var = (ys_var - y_mean_var) / y_std_var
normalized_means_var = L.get_output(
l_mean, {mean_network.input_layer: normalized_xs_var})
normalized_log_stds_var = L.get_output(
l_log_std, {mean_network.input_layer: normalized_xs_var})
means_var = normalized_means_var * y_std_var + y_mean_var
log_stds_var = normalized_log_stds_var + TT.log(y_std_var)
normalized_old_means_var = (old_means_var - y_mean_var) / y_std_var
normalized_old_log_stds_var = old_log_stds_var - TT.log(y_std_var)
dist = self._dist = DiagonalGaussian(output_dim)
normalized_dist_info_vars = dict(
mean=normalized_means_var, log_std=normalized_log_stds_var)
mean_kl = TT.mean(dist.kl_sym(
dict(mean=normalized_old_means_var,
log_std=normalized_old_log_stds_var),
normalized_dist_info_vars,
))
loss = - \
TT.mean(dist.log_likelihood_sym(
normalized_ys_var, normalized_dist_info_vars))
self._f_predict = compile_function([xs_var], means_var)
self._f_pdists = compile_function([xs_var], [means_var, log_stds_var])
self._l_mean = l_mean
self._l_log_std = l_log_std
optimizer_args = dict(
loss=loss,
target=self,
network_outputs=[normalized_means_var, normalized_log_stds_var],
)
if use_trust_region:
optimizer_args["leq_constraint"] = (mean_kl, step_size)
optimizer_args["inputs"] = [
xs_var, ys_var, old_means_var, old_log_stds_var]
else:
optimizer_args["inputs"] = [xs_var, ys_var]
self._optimizer.update_opt(**optimizer_args)
self._use_trust_region = use_trust_region
self._name = name
self._normalize_inputs = normalize_inputs
self._normalize_outputs = normalize_outputs
self._mean_network = mean_network
self._x_mean_var = x_mean_var
self._x_std_var = x_std_var
self._y_mean_var = y_mean_var
self._y_std_var = y_std_var
self._subsample_factor = subsample_factor
self._batchsize = batchsize
def __init__(
self,
input_shape,
output_dim,
predict_all=False, # CF
prob_network=None,
hidden_sizes=(32, 32),
hidden_nonlinearity=NL.rectify,
optimizer=None,
use_trust_region=True,
step_size=0.01,
normalize_inputs=True,
name=None,
):
"""
:param input_shape: Shape of the input data.
:param output_dim: Dimension of output.
:param hidden_sizes: Number of hidden units of each layer of the mean network.
:param hidden_nonlinearity: Non-linearity used for each layer of the mean network.
:param optimizer: Optimizer for minimizing the negative log-likelihood.
:param use_trust_region: Whether to use trust region constraint.
:param step_size: KL divergence constraint for each iteration
"""
Serializable.quick_init(self, locals())
if optimizer is None:
if use_trust_region:
optimizer = PenaltyLbfgsOptimizer()
else:
optimizer = LbfgsOptimizer()
self.output_dim = output_dim
self._optimizer = optimizer
if prob_network is None:
prob_network = GRUNetwork(
input_shape=input_shape,
output_dim=output_dim,
hidden_dim=hidden_sizes[0], # this gives 32 by default
hidden_nonlinearity=hidden_nonlinearity,
output_nonlinearity=NL.softmax,
)
l_prob = prob_network.output_layer
LasagnePowered.__init__(self, [l_prob])
xs_var = prob_network.input_layer.input_var
ys_var = TT.itensor3("ys")
old_prob_var = TT.tensor3("old_prob")
x_mean_var = theano.shared(
np.zeros(
(
1,
1,
) + input_shape
), # this syntax makes the shape (1,1,*input_shape,). The first is traj
name="x_mean",
broadcastable=(
True,
True,
) + (False, ) * len(input_shape))
x_std_var = theano.shared(np.ones((
1,
1,
) + input_shape),
name="x_std",
broadcastable=(
True,
True,
) + (False, ) * len(input_shape))
normalized_xs_var = (xs_var - x_mean_var) / x_std_var
prob_var_all = L.get_output(
l_prob, {prob_network.input_layer: normalized_xs_var})
if predict_all:
prob_var = prob_var_all
else:
# take only last dim but keep the shape
prob_var_last = TT.reshape(
prob_var_all[:, -1, :],
(TT.shape(prob_var_all)[0], 1, TT.shape(prob_var_all)[2]))
# padd along the time dimension to obtain the same shape as before
padded_prob_var = TT.tile(prob_var_last,
(1, TT.shape(prob_var_all)[1], 1))
# give it the standard name
prob_var = padded_prob_var
old_info_vars = dict(prob=old_prob_var)
info_vars = dict(prob=prob_var)
dist = self._dist = Categorical(output_dim)
mean_kl = TT.mean(dist.kl_sym(old_info_vars, info_vars))
loss = -TT.mean(dist.log_likelihood_sym(ys_var, info_vars))
predicted_flat = special.to_onehot_sym(
TT.flatten(TT.argmax(prob_var, axis=-1)), output_dim)
predicted = TT.reshape(predicted_flat, TT.shape(prob_var))
self._f_predict = ext.compile_function([xs_var], predicted)
self._f_prob = ext.compile_function([xs_var], prob_var)
self._prob_network = prob_network
self._l_prob = l_prob
optimizer_args = dict(
loss=loss,
target=self,
network_outputs=[prob_var],
)
if use_trust_region:
optimizer_args["leq_constraint"] = (mean_kl, step_size)
optimizer_args["inputs"] = [xs_var, ys_var, old_prob_var]
else:
optimizer_args["inputs"] = [xs_var, ys_var]
self._optimizer.update_opt(**optimizer_args)
self._use_trust_region = use_trust_region
self._name = name
self._normalize_inputs = normalize_inputs
self._x_mean_var = x_mean_var
self._x_std_var = x_std_var
def __init__(
self,
env_spec,
hidden_sizes=(32, 32),
learn_std=True,
init_std=1.0,
adaptive_std=False,
std_share_network=False,
std_hidden_sizes=(32, 32),
min_std=1e-6,
std_hidden_nonlinearity=NL.tanh,
hidden_nonlinearity=NL.tanh,
output_nonlinearity=None,
):
"""
:param env_spec:
:param hidden_sizes: list of sizes for the fully-connected hidden layers
:param learn_std: Is std trainable
:param init_std: Initial std
:param adaptive_std:
:param std_share_network:
:param std_hidden_sizes: list of sizes for the fully-connected layers for std
:param min_std: whether to make sure that the std is at least some threshold value, to avoid numerical issues
:param std_hidden_nonlinearity:
:param hidden_nonlinearity: nonlinearity used for each hidden layer
:param output_nonlinearity: nonlinearity for the output layer
:return:
"""
Serializable.quick_init(self, locals())
assert isinstance(env_spec.action_space, Box)
obs_dim = env_spec.observation_space.flat_dim
action_dim = env_spec.action_space.flat_dim
# create network
mean_network = MLP(
input_shape=(obs_dim,),
output_dim=action_dim,
hidden_sizes=hidden_sizes,
hidden_nonlinearity=hidden_nonlinearity,
output_nonlinearity=output_nonlinearity,
)
self._mean_network = mean_network
l_mean = mean_network.output_layer
obs_var = mean_network.input_var
if adaptive_std:
std_network = MLP(
input_shape=(obs_dim,),
input_layer=mean_network.input_layer,
output_dim=action_dim,
hidden_sizes=std_hidden_sizes,
hidden_nonlinearity=std_hidden_nonlinearity,
output_nonlinearity=None,
)
l_log_std = std_network.output_layer
else:
l_log_std = ParamLayer(
mean_network.input_layer,
num_units=action_dim,
param=lasagne.init.Constant(np.log(init_std)),
name="output_log_std",
trainable=learn_std,
)
self.min_std = min_std
mean_var, log_std_var = L.get_output([l_mean, l_log_std])
if self.min_std is not None:
log_std_var = TT.maximum(log_std_var, np.log(min_std))
self._mean_var, self._log_std_var = mean_var, log_std_var
self._l_mean = l_mean
self._l_log_std = l_log_std
self._dist = DiagonalGaussian()
LasagnePowered.__init__(self, [l_mean, l_log_std])
super(GaussianMLPPolicy, self).__init__(env_spec)
self._f_dist = ext.compile_function(
inputs=[obs_var],
outputs=[mean_var, log_std_var],
)
def __init__(
self,
env_spec,
hidden_sizes=(),
learn_std=True,
init_std=1.0,
adaptive_std=False,
std_share_network=False,
std_hidden_sizes=(32, 32),
min_std=1e-6,
std_hidden_nonlinearity=NL.tanh,
hidden_nonlinearity=NL.tanh,
output_nonlinearity=None,
mean_network=None,
std_network=None,
dist_cls=DiagonalGaussian,
hlc_output_dim=0,
subnet_split1=[2, 3, 4, 11, 12, 13],
subnet_split2=[5, 6, 7, 14, 15, 16],
sub_out_dim=3,
option_dim=4,
):
Serializable.quick_init(self, locals())
assert isinstance(env_spec.action_space, Box)
obs_dim = env_spec.observation_space.flat_dim
action_dim = env_spec.action_space.flat_dim
# create network
if mean_network is None:
mean_network = HMLPPhase(
hidden_sizes,
hidden_nonlinearity,
input_shape=(obs_dim, ),
subnet_split1=subnet_split1,
subnet_split2=subnet_split2,
hlc_output_dim=hlc_output_dim,
sub_out_dim=sub_out_dim,
option_dim=option_dim,
)
self._mean_network = mean_network
l_mean = mean_network.output_layer
obs_var = mean_network.input_layer.input_var
if std_network is not None:
l_log_std = std_network.output_layer
else:
if adaptive_std:
std_network = MLP(
input_shape=(obs_dim, ),
input_layer=mean_network.input_layer,
output_dim=action_dim,
hidden_sizes=std_hidden_sizes,
hidden_nonlinearity=std_hidden_nonlinearity,
output_nonlinearity=None,
)
l_log_std = std_network.output_layer
else:
l_log_std = ParamLayer(
mean_network.input_layer,
num_units=action_dim,
param=lasagne.init.Constant(np.log(init_std)),
name="output_log_std",
trainable=learn_std,
)
self.min_std = min_std
mean_var, log_std_var = L.get_output([l_mean, l_log_std])
if self.min_std is not None:
log_std_var = TT.maximum(log_std_var, np.log(min_std))
self._mean_var, self._log_std_var = mean_var, log_std_var
self._l_mean = l_mean
self._l_log_std = l_log_std
self._dist = dist_cls(action_dim)
LasagnePowered.__init__(self, [l_mean, l_log_std])
super(GaussianMLPPolicy, self).__init__(env_spec)
self._f_dist = ext.compile_function(
inputs=[obs_var],
outputs=[mean_var, log_std_var],
)
self._f_dist = ext.compile_function(
inputs=[obs_var],
outputs=[mean_var, log_std_var],
)
self.hidden_signals = ext.compile_function(
inputs=[obs_var],
outputs=[
mean_network.hlc_signal1, mean_network.hlc_signal2,
mean_network.leg1_part, mean_network.leg2_part
])
def __init__(
self,
env_spec,
hidden_dim=32,
feature_network=None,
state_include_action=True,
hidden_nonlinearity=NL.tanh):
"""
:param env_spec: A spec for the env.
:param hidden_dim: dimension of hidden layer
:param hidden_nonlinearity: nonlinearity used for each hidden layer
:return:
"""
assert isinstance(env_spec.action_space, Discrete)
Serializable.quick_init(self, locals())
super(CategoricalGRUPolicy, self).__init__(env_spec)
obs_dim = env_spec.observation_space.flat_dim
action_dim = env_spec.action_space.flat_dim
if state_include_action:
input_dim = obs_dim + action_dim
else:
input_dim = obs_dim
l_input = L.InputLayer(
shape=(None, None, input_dim),
name="input"
)
if feature_network is None:
feature_dim = input_dim
l_flat_feature = None
l_feature = l_input
else:
feature_dim = feature_network.output_layer.output_shape[-1]
l_flat_feature = feature_network.output_layer
l_feature = OpLayer(
l_flat_feature,
extras=[l_input],
name="reshape_feature",
op=lambda flat_feature, input: TT.reshape(
flat_feature,
[input.shape[0], input.shape[1], feature_dim]
),
shape_op=lambda _, input_shape: (input_shape[0], input_shape[1], feature_dim)
)
prob_network = GRUNetwork(
input_shape=(feature_dim,),
input_layer=l_feature,
output_dim=env_spec.action_space.n,
hidden_dim=hidden_dim,
hidden_nonlinearity=hidden_nonlinearity,
output_nonlinearity=TT.nnet.softmax,
name="prob_network"
)
self.prob_network = prob_network
self.feature_network = feature_network
self.l_input = l_input
self.state_include_action = state_include_action
flat_input_var = TT.matrix("flat_input")
if feature_network is None:
feature_var = flat_input_var
else:
feature_var = L.get_output(l_flat_feature, {feature_network.input_layer: flat_input_var})
self.f_step_prob = ext.compile_function(
[
flat_input_var,
prob_network.step_prev_hidden_layer.input_var
],
L.get_output([
prob_network.step_output_layer,
prob_network.step_hidden_layer
], {prob_network.step_input_layer: feature_var})
)
self.input_dim = input_dim
self.action_dim = action_dim
self.hidden_dim = hidden_dim
self.prev_action = None
self.prev_hidden = None
self.dist = RecurrentCategorical(env_spec.action_space.n)
out_layers = [prob_network.output_layer]
if feature_network is not None:
out_layers.append(feature_network.output_layer)
LasagnePowered.__init__(self, out_layers)
def __init__(
self,
name,
env_spec,
conv_filters, conv_filter_sizes, conv_strides, conv_pads,
hidden_sizes=[],
hidden_nonlinearity=NL.rectify,
output_nonlinearity=NL.softmax,
prob_network=None,
feature_layer_index=-2,
eps=0,
):
"""
The policy consists of several convolution layers followed by fc layers and softmax
:param env_spec: A spec for the mdp.
:param conv_filters, conv_filter_sizes, conv_strides, conv_pads: specify the convolutional layers. See rllab.core.network.ConvNetwork for details.
:param hidden_sizes: list of sizes for the fully connected hidden layers
:param hidden_nonlinearity: nonlinearity used for each hidden layer
:param prob_network: manually specified network for this policy, other network params
are ignored
:param feature_layer_index: index of the feature layer. Default -2 means the last layer before fc-softmax
:param eps: mixture weight on uniform distribution; useful to force exploration
:return:
"""
Serializable.quick_init(self, locals())
assert isinstance(env_spec.action_space, Discrete)
self._env_spec = env_spec
if prob_network is None:
prob_network = ConvNetwork(
input_shape=env_spec.observation_space.shape,
output_dim=env_spec.action_space.n,
conv_filters=conv_filters,
conv_filter_sizes=conv_filter_sizes,
conv_strides=conv_strides,
conv_pads=conv_pads,
hidden_sizes=hidden_sizes,
hidden_nonlinearity=hidden_nonlinearity,
output_nonlinearity=NL.softmax,
name="prob_network",
)
self._l_prob = prob_network.output_layer
self._l_obs = prob_network.input_layer
# mix in uniform distribution
n_actions = env_spec.action_space.n
uniform_prob = np.ones(n_actions,dtype=theano.config.floatX) / n_actions
eps_var = theano.shared(
eps,
name="eps",
)
nn_prob = L.get_output(prob_network.output_layer)
final_prob = (1-eps_var) * nn_prob + eps_var * uniform_prob
self._f_prob = ext.compile_function(
[prob_network.input_layer.input_var],
final_prob,
)
self._eps_var = eps_var
self._feature_layer_index = feature_layer_index
feature_layer = L.get_all_layers(prob_network.output_layer)[feature_layer_index] # layer before fc-softmax
self._f_feature = ext.compile_function(
[prob_network.input_layer.input_var],
L.get_output(feature_layer)
)
self._feature_shape = L.get_output_shape(feature_layer)[1:]
self._dist = Categorical(env_spec.action_space.n)
super(CategoricalConvPolicy, self).__init__(env_spec)
LasagnePowered.__init__(self, [prob_network.output_layer])
def __init__(
self,
env_spec,
env,
latent_dim=2,
latent_name='bernoulli',
bilinear_integration=False,
resample=False,
hidden_sizes=(32, 32),
learn_std=True,
init_std=1.0,
adaptive_std=False,
std_share_network=False,
std_hidden_sizes=(32, 32),
std_hidden_nonlinearity=NL.tanh,
hidden_nonlinearity=NL.tanh,
output_nonlinearity=None,
min_std=1e-4,
pkl_path=None,
):
"""
:param latent_dim: dimension of the latent variables
:param latent_name: distribution of the latent variables
:param bilinear_integration: Boolean indicator of bilinear integration or simple concatenation
:param resample: Boolean indicator of resampling at every step or only at the start of the rollout (or whenever
agent is reset, which can happen several times along the rollout with rollout in utils_snn)
"""
self.latent_dim = latent_dim ##could I avoid needing this self for the get_action?
self.latent_name = latent_name
self.bilinear_integration = bilinear_integration
self.resample = resample
self.min_std = min_std
self.hidden_sizes = hidden_sizes
self.pre_fix_latent = np.array(
[]
) # if this is not empty when using reset() it will use this latent
self.latent_fix = np.array(
[]) # this will hold the latents variable sampled in reset()
self._set_std_to_0 = False
self.pkl_path = pkl_path
if self.pkl_path:
data = joblib.load(os.path.join(config.PROJECT_PATH,
self.pkl_path))
self.old_policy = data["policy"]
self.latent_dim = self.old_policy.latent_dim
self.latent_name = self.old_policy.latent_name
self.bilinear_integration = self.old_policy.bilinear_integration
self.resample = self.old_policy.resample # this could not be needed...
self.min_std = self.old_policy.min_std
self.hidden_sizes_snn = self.old_policy.hidden_sizes
if latent_name == 'normal':
self.latent_dist = DiagonalGaussian(self.latent_dim)
self.latent_dist_info = dict(mean=np.zeros(self.latent_dim),
log_std=np.zeros(self.latent_dim))
elif latent_name == 'bernoulli':
self.latent_dist = Bernoulli(self.latent_dim)
self.latent_dist_info = dict(p=0.5 * np.ones(self.latent_dim))
elif latent_name == 'categorical':
self.latent_dist = Categorical(self.latent_dim)
if self.latent_dim > 0:
self.latent_dist_info = dict(prob=1. / self.latent_dim *
np.ones(self.latent_dim))
else:
self.latent_dist_info = dict(prob=np.ones(self.latent_dim))
else:
raise NotImplementedError
Serializable.quick_init(self, locals())
assert isinstance(env_spec.action_space, Box)
# retrieve dimensions from env!
if isinstance(env, MazeEnv) or isinstance(env, GatherEnv):
self.obs_robot_dim = env.robot_observation_space.flat_dim
self.obs_maze_dim = env.maze_observation_space.flat_dim
elif isinstance(env, NormalizedEnv):
if isinstance(env.wrapped_env, MazeEnv) or isinstance(
env.wrapped_env, GatherEnv):
self.obs_robot_dim = env.wrapped_env.robot_observation_space.flat_dim
self.obs_maze_dim = env.wrapped_env.maze_observation_space.flat_dim
else:
self.obs_robot_dim = env.wrapped_env.observation_space.flat_dim
self.obs_maze_dim = 0
else:
self.obs_robot_dim = env.observation_space.flat_dim
self.obs_maze_dim = 0
# print("the dims of the env are(rob/maze): ", self.obs_robot_dim, self.obs_maze_dim)
all_obs_dim = env_spec.observation_space.flat_dim
assert all_obs_dim == self.obs_robot_dim + self.obs_maze_dim
if self.bilinear_integration:
obs_dim = self.obs_robot_dim + self.latent_dim +\
self.obs_robot_dim * self.latent_dim
else:
obs_dim = self.obs_robot_dim + self.latent_dim # here only if concat.
action_dim = env_spec.action_space.flat_dim
# for _ in range(10):
# print("OK!")
# print(obs_dim)
# print(env_spec.observation_space.flat_dim)
# print(self.latent_dim)
mean_network = MLP(
input_shape=(obs_dim, ),
output_dim=action_dim,
hidden_sizes=hidden_sizes,
hidden_nonlinearity=hidden_nonlinearity,
output_nonlinearity=output_nonlinearity,
name="meanMLP",
)
self._layers_mean = mean_network.layers
l_mean = mean_network.output_layer
obs_var = mean_network.input_layer.input_var
if adaptive_std:
log_std_network = MLP(input_shape=(obs_dim, ),
input_var=obs_var,
output_dim=action_dim,
hidden_sizes=std_hidden_sizes,
hidden_nonlinearity=std_hidden_nonlinearity,
output_nonlinearity=None,
name="log_stdMLP")
l_log_std = log_std_network.output_layer
self._layers_log_std = log_std_network.layers
else:
l_log_std = ParamLayer(
mean_network.input_layer,
num_units=action_dim,
param=lasagne.init.Constant(np.log(init_std)),
name="output_log_std",
trainable=learn_std,
)
self._layers_log_std = [l_log_std]
self._layers_snn = self._layers_mean + self._layers_log_std # this returns a list with the "snn" layers
if self.pkl_path: # restore from pkl file
data = joblib.load(os.path.join(config.PROJECT_PATH,
self.pkl_path))
warm_params = data['policy'].get_params_internal()
self.set_params_snn(warm_params)
mean_var, log_std_var = L.get_output([l_mean, l_log_std])
if self.min_std is not None:
log_std_var = TT.maximum(log_std_var, np.log(self.min_std))
self._l_mean = l_mean
self._l_log_std = l_log_std
self._dist = DiagonalGaussian(action_dim)
LasagnePowered.__init__(self, [l_mean, l_log_std])
super(GaussianMLPPolicy_snn_restorable, self).__init__(env_spec)
self._f_dist = ext.compile_function(
inputs=[obs_var],
outputs=[mean_var, log_std_var],
)