class RecurrentCategorical(Distribution):
def __init__(self, dim):
self._cat = Categorical(dim)
self._dim = dim
@property
def dim(self):
return self._dim
def kl_sym(self, old_dist_info_vars, new_dist_info_vars):
"""
Compute the symbolic KL divergence of two categorical distributions
"""
old_prob_var = old_dist_info_vars["prob"]
new_prob_var = new_dist_info_vars["prob"]
# Assume layout is N * T * A
return TT.sum(old_prob_var * (TT.log(old_prob_var + TINY) - TT.log(new_prob_var + TINY)), axis=2)
def kl(self, old_dist_info, new_dist_info):
"""
Compute the KL divergence of two categorical distributions
"""
old_prob = old_dist_info["prob"]
new_prob = new_dist_info["prob"]
return np.sum(old_prob * (np.log(old_prob + TINY) - np.log(new_prob + TINY)), axis=2)
def likelihood_ratio_sym(self, x_var, old_dist_info_vars, new_dist_info_vars):
old_prob_var = old_dist_info_vars["prob"]
new_prob_var = new_dist_info_vars["prob"]
# Assume layout is N * T * A
a_dim = x_var.shape[-1]
flat_ratios = self._cat.likelihood_ratio_sym(
x_var.reshape((-1, a_dim)),
dict(prob=old_prob_var.reshape((-1, a_dim))),
dict(prob=new_prob_var.reshape((-1, a_dim))),
)
return flat_ratios.reshape(old_prob_var.shape[:2])
def entropy(self, dist_info):
probs = dist_info["prob"]
return -np.sum(probs * np.log(probs + TINY), axis=2)
def log_likelihood_sym(self, xs, dist_info_vars):
probs = dist_info_vars["prob"]
# Assume layout is N * T * A
a_dim = probs.shape[-1]
# a_dim = TT.printing.Print("lala")(a_dim)
flat_logli = self._cat.log_likelihood_sym(xs.reshape((-1, a_dim)), dict(prob=probs.reshape((-1, a_dim))))
return flat_logli.reshape(probs.shape[:2])
def log_likelihood(self, xs, dist_info):
probs = dist_info["prob"]
# Assume layout is N * T * A
a_dim = probs.shape[-1]
flat_logli = self._cat.log_likelihood_sym(xs.reshape((-1, a_dim)), dict(prob=probs.reshape((-1, a_dim))))
return flat_logli.reshape(probs.shape[:2])
@property
def dist_info_keys(self):
return ["prob"]
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,
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,
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, discrete_dim, chain_trigger, chain_distr):
"""
Args:
discrete_dim: Cardinality of the categorical distribution.
chain_trigger: Value of the categorical distribution which should
trigger the chained distribution.
chain_distribution: A child `Distribution` instance which is
triggered when the parent categorical distribution selects the
particular value `chain_trigger`. This should be a discrete
distribution; bad things will happen if it is not one.
"""
self._prior_distr = Categorical(discrete_dim)
self._chain_trigger = chain_trigger
self._chain_distr = chain_distr
# This is easier to code if the chain trigger is the final choice in
# the categorical space.
assert self._chain_trigger == discrete_dim - 1
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,
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])
class RecurrentCategorical(Distribution):
def __init__(self):
self._cat = Categorical()
def kl_sym(self, old_dist_info_vars, new_dist_info_vars):
"""
Compute the symbolic KL divergence of two categorical distributions
"""
old_prob_var = old_dist_info_vars["prob"]
new_prob_var = new_dist_info_vars["prob"]
# Assume layout is N * T * A
return TT.sum(
old_prob_var *
(TT.log(old_prob_var + TINY) - TT.log(new_prob_var + TINY)),
axis=2)
def kl(self, old_dist_info, new_dist_info):
"""
Compute the KL divergence of two categorical distributions
"""
old_prob = old_dist_info["prob"]
new_prob = new_dist_info["prob"]
return np.sum(old_prob *
(np.log(old_prob + TINY) - np.log(new_prob + TINY)),
axis=2)
def likelihood_ratio_sym(self, x_var, old_dist_info_vars,
new_dist_info_vars):
old_prob_var = old_dist_info_vars["prob"]
new_prob_var = new_dist_info_vars["prob"]
# Assume layout is N * T * A
a_dim = x_var.shape[-1]
flat_ratios = self._cat.likelihood_ratio_sym(
x_var.reshape((-1, a_dim)),
dict(prob=old_prob_var.reshape((-1, a_dim))),
dict(prob=new_prob_var.reshape((-1, a_dim))))
return flat_ratios.reshape(old_prob_var.shape[:2])
def entropy(self, dist_info):
probs = dist_info["prob"]
return -np.sum(probs * np.log(probs + TINY), axis=2)
def log_likelihood_sym(self, xs, dist_info_vars):
probs = dist_info_vars["prob"]
# Assume layout is N * T * A
a_dim = probs.shape[-1]
# a_dim = TT.printing.Print("lala")(a_dim)
flat_logli = self._cat.log_likelihood_sym(
xs.reshape((-1, a_dim)), dict(prob=probs.reshape((-1, a_dim))))
return flat_logli.reshape(probs.shape[:2])
def log_likelihood(self, xs, dist_info):
probs = dist_info["prob"]
# Assume layout is N * T * A
a_dim = probs.shape[-1]
flat_logli = self._cat.log_likelihood_sym(
xs.reshape((-1, a_dim)), dict(prob=probs.reshape((-1, a_dim))))
return flat_logli.reshape(probs.shape[:2])
@property
def dist_info_keys(self):
return ["prob"]
def __init__(self):
self._cat = Categorical()
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,
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, dim):
self._cat = Categorical(dim)
self._dim = dim
def __init__(self):
self._cat = Categorical()
def __init__(self, dim):
self._cat = Categorical(dim)
self._dim = dim
