def get_last_features(self, x, reuse):
x_has_timesteps = (x.get_shape().ndims == 5)
if x_has_timesteps:
sh = tf.shape(x)
x = flatten_two_dims(x)
#with tf.variable_scope(self.scope + "_features", reuse=reuse):
with tf.variable_scope(self.scope+"_features", reuse=reuse):
x = (tf.to_float(x) - self.ob_mean) / self.ob_std
x = small_convnet(x, nl=self.nl, feat_dim=self.feat_dim, last_nl=None, layernormalize=self.layernormalize)
if x_has_timesteps:
x = unflatten_first_dim(x, sh)
x = tf.reshape(x, [-1, sh[1], self.feat_dim])
with tf.variable_scope(self.scope, reuse=tf.AUTO_REUSE):
init_1 = tf.contrib.rnn.LSTMStateTuple(self.last_c_in_1, self.last_h_in_1)
if self.lstm2_size:
init_2 = tf.contrib.rnn.LSTMStateTuple(self.last_c_in_2, self.last_h_in_2)
if self.aux_input:
prev_rews = tf.expand_dims(self.ph_last_rew, -1)
x = tf.concat([x, prev_rews], -1)
x, c_out_1, h_out_1 = lstm(self.lstm1_size)(x, initial_state=init_1)
if self.lstm2_size:
if self.aux_input:
prev_acs = tf.one_hot(self.ph_last_ac, depth=self.num_actions)
x = tf.concat([x, tf.cast(prev_acs, tf.float32)], -1)
x = tf.concat([x, self.ph_last_vel], -1)
x, c_out_2, h_out_2 = lstm(self.lstm2_size)(x, initial_state=init_2)
return x
def __init__(self,
ob_space,
ac_space,
hidsize,
ob_mean,
ob_std,
feat_dim,
layernormalize,
nl,
scope="policy"):
if layernormalize:
print(
"Warning: policy is operating on top of layer-normed features. It might slow down the training."
)
self.layernormalize = layernormalize
self.nl = nl
self.ob_mean = ob_mean
self.ob_std = ob_std
self.ob_space = ob_space
self.ac_space = ac_space
self.ac_pdtype = make_pdtype(ac_space)
self.pd = self.vpred = None
self.hidsize = hidsize
self.feat_dim = feat_dim
self.scope = scope
pdparamsize = self.ac_pdtype.param_shape()[0]
self.features_model = small_convnet(self.ob_space,
nl=self.nl,
feat_dim=self.feat_dim,
last_nl=None,
layernormalize=self.layernormalize)
self.pd_hidden = torch.nn.Sequential(
torch.nn.Linear(feat_dim, hidsize),
torch.nn.ReLU(),
torch.nn.Linear(hidsize, hidsize),
torch.nn.ReLU(),
)
self.pd_head = torch.nn.Linear(hidsize, pdparamsize)
self.vf_head = torch.nn.Linear(hidsize, 1)
self.param_list = [
dict(params=self.features_model.parameters()),
dict(params=self.pd_hidden.parameters()),
dict(params=self.pd_head.parameters()),
dict(params=self.vf_head.parameters())
]
self.flat_features = None
self.pd = None
self.vpred = None
self.ac = None
self.ob = None
def get_features(self, x, reuse):
nl = tf.nn.leaky_relu
x_has_timesteps = (x.get_shape().ndims == 5)
if x_has_timesteps:
sh = tf.shape(x)
x = flatten_two_dims(x)
with tf.variable_scope(self.scope + "_features", reuse=reuse):
x = (tf.to_float(x) - self.ob_mean) / self.ob_std
x = small_convnet(x, nl=nl, feat_dim=self.feat_dim, last_nl=nl, layernormalize=False)
if x_has_timesteps:
x = unflatten_first_dim(x, sh)
return x
def get_features(self, x, reuse):
x_has_timesteps = (x.get_shape().ndims == 5)
if x_has_timesteps:
sh = tf.shape(x)
x = flatten_two_dims(x)
with tf.variable_scope(self.scope + "_features", reuse=reuse):
x = tf.to_float(x)
x = small_convnet(x, nl=self.nl, feat_dim=self.feat_dim, last_nl=None, layernormalize=self.layernormalize)
if x_has_timesteps:
x = unflatten_first_dim(x, sh)
return x
def get_features(self, x, reuse):
if (x.get_shape().ndims == 5):
shape = tf.shape(x)
x = flatten_two_dims(x)
with tf.variable_scope(self.scope + '_features', reuse=reuse):
x = (tf.cast(x, tf.float32) - self.ob_mean) / self.ob_std
x = small_convnet(x,
nl=self.nl,
feat_dim=self.feat_dim,
last_nl=None,
layernormalize=self.layernormalize)
if (x.get_shape().ndims == 5):
x = unflatten_first_dim(x, shape)
return x
def __init__(self,
auxiliary_task,
predict_from_pixels,
feat_dim=None,
scope='dynamics'):
self.scope = scope
self.auxiliary_task = auxiliary_task
self.hidsize = self.auxiliary_task.hidsize
self.feat_dim = feat_dim
self.ac_space = self.auxiliary_task.ac_space
self.ob_mean = self.auxiliary_task.ob_mean
self.ob_std = self.auxiliary_task.ob_std
self.predict_from_pixels = predict_from_pixels
self.param_list = []
if predict_from_pixels:
self.features_model = small_convnet(self.ob_space,
nl=torch.nn.LeakyReLU,
feat_dim=self.feat_dim,
last_nl=torch.nn.LeakyReLU,
layernormalize=False)
self.param_list = self.param_list + [
dict(params=self.features_model.parameters())
]
else:
self.features_model = None
# not understand why we need a net in the origin implementation
self.loss_net = loss_net(nblocks=4,
feat_dim=self.feat_dim,
ac_dim=self.ac_space.n,
out_feat_dim=self.feat_dim,
hidsize=self.hidsize)
self.param_list = self.param_list + [
dict(params=self.loss_net.parameters())
]
self.features = None
self.next_features = None
self.ac = None
self.ob = None
def __init__(self,
policy,
features_shared_with_policy,
feat_dim=None,
layernormalize=None,
scope='feature_extractor'):
self.scope = scope
self.features_shared_with_policy = features_shared_with_policy
self.feat_dim = feat_dim
self.layernormalize = layernormalize
self.policy = policy
self.hidsize = policy.hidsize
self.ob_space = policy.ob_space
self.ac_space = policy.ac_space
self.ob_mean = self.policy.ob_mean
self.ob_std = self.policy.ob_std
self.features_shared_with_policy = features_shared_with_policy
self.param_list = []
if features_shared_with_policy:
self.features_model = None
else:
self.features_model = small_convnet(
self.ob_space,
nl=torch.nn.LeakyReLU,
feat_dim=self.feat_dim,
last_nl=None,
layernormalize=self.layernormalize)
self.param_list = self.param_list + [
dict(params=self.features_model.parameters())
]
self.scope = scope
self.features = None
self.next_features = None
self.ac = None
self.ob = None
def __init__(self,
policy,
features_shared_with_policy,
feat_dim=None,
layernormalize=False,
spherical_obs=False):
assert not layernormalize, "VAE features should already have reasonable size, no need to layer normalize them"
super(VAE, self).__init__(
scope="vae",
policy=policy,
features_shared_with_policy=features_shared_with_policy,
feat_dim=feat_dim,
layernormalize=False)
self.features_model = small_convnet(self.ob_space,
nl=torch.nn.LeakyReLU,
feat_dim=2 * self.feat_dim,
last_nl=None,
layernormalize=False)
self.decoder_model = small_deconvnet(self.ob_space,
feat_dim=self.feat_dim,
nl=torch.nn.LeakyReLU,
ch=4 if spherical_obs else 8,
positional_bias=True)
self.param_list = [
dict(params=self.features_model.parameters()),
dict(params=self.decoder_model.parameters())
]
self.features_std = None
self.next_features_std = None
self.spherical_obs = spherical_obs
if self.spherical_obs:
self.scale = torch.nn.Parameter(torch.tensor(1.0),
requires_grad=True)
self.param_list = self.param_list + [dict(params=[self.scale])]