class ValueNet(nn.Module):
"""Simple feed forward value network.
"""
def __init__(self, obs_shapes, non_lin=nn.Tanh):
super().__init__()
# build perception part
self.perception_network = DenseBlock(in_keys="observation", out_keys="latent",
in_shapes=obs_shapes['observation'],
hidden_units=[32, 32], non_lin=non_lin)
module_init = make_module_init_normc(std=1.0)
self.perception_network.apply(module_init)
# build action head
self.value_head = LinearOutputBlock(in_keys="latent", out_keys="value",
in_shapes=self.perception_network.out_shapes(),
output_units=1)
module_init = make_module_init_normc(std=0.01)
self.value_head.apply(module_init)
# compile inference model
self.net = InferenceBlock(in_keys="observation", out_keys="value", in_shapes=list(obs_shapes.values()),
perception_blocks={"latent": self.perception_network,
"value": self.value_head})
def forward(self, x):
""" forward pass. """
return self.net(x)
def template_policy_net(
self, observation_space: spaces.Dict, action_space: spaces.Dict,
shared_embedding_keys: List[str]
) -> Tuple[InferenceBlock, InferenceBlock]:
"""Compiles a template policy network.
:param observation_space: The input observations for the perception network.
:param action_space: The action space that defines the network action heads.
:param shared_embedding_keys: The list of embedding keys for this substep's model.
:return: A policy network (actor) InferenceBlock, as well as the embedding net InferenceBlock if shared keys
have been specified.
"""
# build perception net
embedding_net = self.template_perception_net(observation_space)
# build action head
perception_dict = embedding_net.perception_dict
action_heads = []
for action_head, action_space in action_space.spaces.items():
# initialize action head
action_net = LinearOutputBlock(
in_keys="latent",
out_keys=action_head,
in_shapes=perception_dict["latent"].out_shapes(),
output_units=self._distribution_mapper.required_logits_shape(
action_head)[0])
module_init = make_module_init_normc(std=0.01)
action_net.apply(module_init)
# extent perception dictionary
perception_dict[action_head] = action_net
action_heads.append(action_head)
# compile inference model
shared_embedding_keys_remove_input = list(
filter(lambda x: x not in embedding_net.in_keys,
shared_embedding_keys))
net = InferenceBlock(in_keys=embedding_net.in_keys,
out_keys=action_heads +
shared_embedding_keys_remove_input,
in_shapes=embedding_net.in_shapes,
perception_blocks=perception_dict)
if len(shared_embedding_keys_remove_input) == 0:
embedding_net = None
return net, embedding_net
def __init__(self, obs_shapes: Dict[str, Sequence[int]], action_logits_shapes: Dict[str, Sequence[int]],
non_lin: Union[str, type(nn.Module)], hidden_units: List[int]):
super().__init__()
# Maze relies on dictionaries to represent the inference graph
self.perception_dict = OrderedDict()
# build latent embedding block
self.perception_dict['latent'] = DenseBlock(
in_keys='observation', out_keys='latent', in_shapes=obs_shapes['observation'],
hidden_units=hidden_units,non_lin=non_lin)
# build action head
self.perception_dict['action'] = LinearOutputBlock(
in_keys='latent', out_keys='action', in_shapes=self.perception_dict['latent'].out_shapes(),
output_units=int(np.prod(action_logits_shapes["action"])))
# build inference block
self.perception_net = InferenceBlock(
in_keys='observation', out_keys='action', in_shapes=obs_shapes['observation'],
perception_blocks=self.perception_dict)
# apply weight init
self.perception_net.apply(make_module_init_normc(1.0))
self.perception_dict['action'].apply(make_module_init_normc(0.01))
def __init__(self, obs_shapes: Dict[str, Sequence[int]], action_logits_shapes: Dict[str, Sequence[int]],
non_lin: type(nn.Module)):
super().__init__(obs_shapes, non_lin)
for action_head_name in action_logits_shapes.keys():
head_hidden_units = [lambda out_shape: out_shape[0] * 5,
lambda out_shape: out_shape[0] * 2,
lambda out_shape: out_shape[0]]
head_hidden_units = [func(action_logits_shapes[action_head_name]) for func in head_hidden_units]
self.perception_dict[f'{action_head_name}_net'] = DenseBlock(
in_keys='hidden_out', in_shapes=self.perception_dict['hidden_out'].out_shapes(),
out_keys=f'{action_head_name}_net', hidden_units=head_hidden_units[:-1], non_lin=non_lin)
self.perception_dict[f'{action_head_name}'] = LinearOutputBlock(
in_keys=f'{action_head_name}_net',
in_shapes=self.perception_dict[f'{action_head_name}_net'].out_shapes(),
out_keys=action_head_name, output_units=head_hidden_units[-1]
)
# Set up inference block
self.perception_net = InferenceBlock(
in_keys=list(self.obs_shapes.keys()), out_keys=list(action_logits_shapes.keys()),
in_shapes=[self.obs_shapes[key] for key in self.obs_shapes.keys()],
perception_blocks=self.perception_dict)
self.perception_net.apply(make_module_init_normc(1.0))
for action_head_name in action_logits_shapes.keys():
self.perception_dict[f'{action_head_name}'].apply(make_module_init_normc(0.01))
def __init__(self, obs_shapes: Dict[str, Sequence[int]],
hidden_units: List[int], non_lin: nn.Module,
support_range: Tuple[int, int]):
super().__init__(obs_shapes, hidden_units, non_lin)
# build categorical value head
support_set_size = support_range[1] - support_range[0] + 1
self.perception_dict["probabilities"] = LinearOutputBlock(
in_keys="latent",
out_keys="probabilities",
in_shapes=self.perception_dict["latent"].out_shapes(),
output_units=support_set_size)
# compute value as probability weighted sum of supports
def _to_scalar(x: torch.Tensor) -> torch.Tensor:
return support_to_scalar(x, support_range=support_range)
self.perception_dict["value"] = FunctionalBlock(
in_keys="probabilities",
out_keys="value",
in_shapes=self.perception_dict["probabilities"].out_shapes(),
func=_to_scalar)
module_init = make_module_init_normc(std=0.01)
self.perception_dict["probabilities"].apply(module_init)
# compile inference model
self.net = InferenceBlock(in_keys=list(obs_shapes.keys()),
out_keys=["probabilities", "value"],
in_shapes=list(obs_shapes.values()),
perception_blocks=self.perception_dict)
def __init__(self, obs_shapes: Dict[str, Sequence[int]],
action_logits_shapes: Dict[str, Sequence[int]],
non_lin: Union[str,
type(nn.Module)], hidden_units: List[int]):
nn.Module.__init__(self)
CustomComplexLatentNet.__init__(self, obs_shapes, non_lin,
hidden_units)
# build action heads
for action_key, action_shape in action_logits_shapes.items():
self.perception_dict[action_key] = LinearOutputBlock(
in_keys='latent',
out_keys=action_key,
in_shapes=self.perception_dict['latent'].out_shapes(),
output_units=int(np.prod(action_shape)))
# build inference block
in_keys = list(self.obs_shapes.keys())
# Specifically add 'latent_screen' as an out_key to the network, so it will get returned when calling the
# forward method and can be reused by the critic network.
out_keys = list(action_logits_shapes.keys()) + ['latent_screen']
self.perception_net = InferenceBlock(
in_keys=in_keys,
out_keys=out_keys,
perception_blocks=self.perception_dict,
in_shapes=[self.obs_shapes[key] for key in in_keys])
# apply weight init
self.perception_net.apply(make_module_init_normc(1.0))
for action_key in action_logits_shapes.keys():
self.perception_dict[action_key].apply(
make_module_init_normc(0.01))
def __init__(self, obs_shapes: Dict[str, Sequence[int]], non_lin: Union[str, type(nn.Module)]):
nn.Module.__init__(self)
self.obs_shapes = obs_shapes
hidden_units = 32
self.perception_dict = OrderedDict()
self.perception_dict['order_feat'] = DenseBlock(
in_keys='ordered_piece', out_keys='order_feat', in_shapes=self.obs_shapes['ordered_piece'],
hidden_units=[hidden_units], non_lin=non_lin)
self.perception_dict['selected_feat'] = DenseBlock(
in_keys='selected_piece', out_keys='selected_feat', in_shapes=self.obs_shapes['selected_piece'],
hidden_units=[hidden_units], non_lin=non_lin)
self.perception_dict['latent'] = ConcatenationBlock(
in_keys=['order_feat', 'selected_feat'], out_keys='latent',
in_shapes=[[hidden_units], [hidden_units], [hidden_units]], concat_dim=-1)
self.perception_dict['value'] = LinearOutputBlock(
in_keys='latent', out_keys='value', in_shapes=self.perception_dict['latent'].out_shapes(), output_units=1)
in_keys = ['ordered_piece', 'selected_piece']
self.perception_net = InferenceBlock(
in_keys=in_keys, out_keys='value',
in_shapes=[self.obs_shapes[key] for key in in_keys],
perception_blocks=self.perception_dict)
# initialize model weights
self.perception_net.apply(make_module_init_normc(1.0))
self.perception_dict['value'].apply(make_module_init_normc(0.01))
def __init__(self, obs_shapes: Dict[str, Sequence[int]],
head_units: List[int], non_lin: nn.Module):
super().__init__()
self.perception_dict: Dict[str, PerceptionBlock] = dict()
# build action head
# build perception part
self.perception_dict["head"] = DenseBlock(
in_keys="latent",
out_keys="head",
in_shapes=obs_shapes["latent"],
hidden_units=head_units,
non_lin=non_lin)
self.perception_dict["value"] = LinearOutputBlock(
in_keys="head",
out_keys="value",
in_shapes=self.perception_dict["head"].out_shapes(),
output_units=1)
self.perception_dict['head'].apply(make_module_init_normc(std=1.0))
self.perception_dict["value"].apply(make_module_init_normc(std=0.01))
# compile inference model
self.net = InferenceBlock(in_keys=list(obs_shapes.keys()),
out_keys="value",
in_shapes=list(obs_shapes.values()),
perception_blocks=self.perception_dict)
def __init__(self,
obs_shapes: Dict[str, Sequence[int]],
action_logits_shapes: Dict[str, Sequence[int]],
hidden_units: List[int],
head_units: List[int],
non_lin=nn.Module):
super().__init__(obs_shapes, hidden_units, non_lin)
# build perception part
self.perception_dict["head"] = DenseBlock(
in_keys="latent",
out_keys="head",
in_shapes=self.perception_dict["latent"].out_shapes(),
hidden_units=head_units,
non_lin=self.non_lin)
self.perception_dict['head'].apply(make_module_init_normc(std=1.0))
# build action head
for action, shape in action_logits_shapes.items():
self.perception_dict[action] = LinearOutputBlock(
in_keys="head",
out_keys=action,
in_shapes=self.perception_dict["head"].out_shapes(),
output_units=action_logits_shapes[action][-1])
module_init = make_module_init_normc(std=0.01)
self.perception_dict[action].apply(module_init)
# compile inference model
self.net = InferenceBlock(in_keys=list(obs_shapes.keys()),
out_keys=list(action_logits_shapes.keys()) +
['latent'],
in_shapes=list(obs_shapes.values()),
perception_blocks=self.perception_dict)
def __init__(self, obs_shapes: Dict[str, Sequence[int]],
non_lin: type(nn.Module)):
super().__init__(obs_shapes, non_lin)
self.perception_dict['value_head_net'] = DenseBlock(
in_keys='hidden_out',
in_shapes=self.perception_dict['hidden_out'].out_shapes(),
out_keys='value_head_net',
hidden_units=[5, 2],
non_lin=non_lin)
self.perception_dict['value'] = LinearOutputBlock(
in_keys='value_head_net',
in_shapes=self.perception_dict['value_head_net'].out_shapes(),
out_keys='value',
output_units=1)
# Set up inference block
self.perception_net = InferenceBlock(
in_keys=list(self.obs_shapes.keys()),
out_keys='value',
in_shapes=[self.obs_shapes[key] for key in self.obs_shapes.keys()],
perception_blocks=self.perception_dict)
# initialize model weights
self.perception_net.apply(make_module_init_normc(1.0))
self.perception_dict['value'].apply(make_module_init_normc(0.01))
def __init__(self, obs_shapes: Dict[str, Sequence[int]],
non_lin: Union[str,
type(nn.Module)], hidden_units: List[int]):
nn.Module.__init__(self)
CustomComplexLatentNet.__init__(self, obs_shapes, non_lin,
hidden_units)
# build action heads
self.perception_dict['value'] = LinearOutputBlock(
in_keys='latent',
out_keys='value',
in_shapes=self.perception_dict['latent'].out_shapes(),
output_units=1)
# build inference block
in_keys = list(self.obs_shapes.keys())
self.perception_net = InferenceBlock(
in_keys=in_keys,
out_keys='value',
in_shapes=[self.obs_shapes[key] for key in in_keys],
perception_blocks=self.perception_dict)
# apply weight init
self.perception_net.apply(make_module_init_normc(1.0))
self.perception_dict['value'].apply(make_module_init_normc(0.01))
def __init__(self, obs_shapes: Dict[str, Sequence[int]],
action_logits_shapes: Dict[str, Sequence[int]],
non_lin: Union[str, type(nn.Module)]):
super().__init__()
self.obs_shapes = obs_shapes
action_key = list(action_logits_shapes.keys())[0]
# build perception part
self.perception_dict = OrderedDict()
self.perception_dict['embedding'] = DenseBlock(
in_keys="observation",
out_keys="embedding",
in_shapes=obs_shapes['observation'],
hidden_units=[256, 256],
non_lin=non_lin)
# build action head
self.perception_dict[action_key] = LinearOutputBlock(
in_keys="embedding",
out_keys=action_key,
in_shapes=self.perception_dict['embedding'].out_shapes(),
output_units=action_logits_shapes[action_key][0])
self.perception_net = InferenceBlock(
in_keys='observation',
out_keys=action_key,
in_shapes=[self.obs_shapes['observation']],
perception_blocks=self.perception_dict)
# initialize model weights
self.perception_net.apply(make_module_init_normc(1.0))
self.perception_dict[action_key].apply(make_module_init_normc(0.01))
def __init__(self, obs_shapes: Dict[str, Sequence[int]],
non_lin: Union[str,
type(nn.Module)], hidden_units: List[int]):
nn.Module.__init__(self)
# Maze relies on dictionaries to represent the inference graph
self.perception_dict = OrderedDict()
# build latent feature embedding block
self.perception_dict['latent_inventory'] = DenseBlock(
in_keys='observation_inventory',
out_keys='latent_inventory',
in_shapes=obs_shapes['observation_inventory'],
hidden_units=[128],
non_lin=non_lin)
# Concatenate latent features
self.perception_dict['latent_concat'] = ConcatenationBlock(
in_keys=['latent_inventory', 'latent_screen'],
out_keys='latent_concat',
in_shapes=self.perception_dict['latent_inventory'].out_shapes() +
[obs_shapes['latent_screen']],
concat_dim=-1)
# Add latent dense block
self.perception_dict['latent_dense'] = DenseBlock(
in_keys='latent_concat',
out_keys='latent_dense',
hidden_units=hidden_units,
non_lin=non_lin,
in_shapes=self.perception_dict['latent_concat'].out_shapes())
# Add recurrent block
self.perception_dict['latent'] = LSTMLastStepBlock(
in_keys='latent_dense',
out_keys='latent',
in_shapes=self.perception_dict['latent_dense'].out_shapes(),
hidden_size=32,
num_layers=1,
bidirectional=False,
non_lin=non_lin)
# build action heads
self.perception_dict['value'] = LinearOutputBlock(
in_keys='latent',
out_keys='value',
in_shapes=self.perception_dict['latent'].out_shapes(),
output_units=1)
# build inference block
in_keys = list(obs_shapes.keys())
self.perception_net = InferenceBlock(
in_keys=in_keys,
out_keys='value',
in_shapes=[obs_shapes[key] for key in in_keys],
perception_blocks=self.perception_dict)
# apply weight init
self.perception_net.apply(make_module_init_normc(1.0))
self.perception_dict['value'].apply(make_module_init_normc(0.01))
def __init__(self, obs_shapes: Dict[str, Sequence[int]],
non_lin: Union[str, type(nn.Module)]):
nn.Module.__init__(self)
# initialize the perception dictionary
self.perception_dict = OrderedDict()
# concatenate all observations in dictionary
self.perception_dict['concat'] = ConcatenationBlock(
in_keys=[
'cart_position', 'cart_velocity', 'pole_angle',
'pole_angular_velocity'
],
out_keys='concat',
in_shapes=[
obs_shapes['cart_position'], obs_shapes['cart_velocity'],
obs_shapes['pole_angle'], obs_shapes['pole_angular_velocity']
],
concat_dim=-1)
# process concatenated representation with two dense layers
self.perception_dict['embedding'] = DenseBlock(
in_keys='concat',
in_shapes=self.perception_dict['concat'].out_shapes(),
hidden_units=[128, 128],
non_lin=non_lin,
out_keys='embedding')
# add a linear output block
self.perception_dict['value'] = LinearOutputBlock(
in_keys='embedding',
out_keys='value',
in_shapes=self.perception_dict['embedding'].out_shapes(),
output_units=1)
# compile an inference block
self.perception_net = InferenceBlock(
in_keys=[
'cart_position', 'cart_velocity', 'pole_angle',
'pole_angular_velocity'
],
out_keys='value',
in_shapes=[
obs_shapes[key] for key in [
'cart_position', 'cart_velocity', 'pole_angle',
'pole_angular_velocity'
]
],
perception_blocks=self.perception_dict)
# initialize model weights
self.perception_net.apply(make_module_init_normc(1.0))
self.perception_dict['value'].apply(make_module_init_normc(0.01))
def __init__(self, obs_shapes: Dict[str, Sequence[int]],
action_spaces_dict: Dict[Union[str, int], spaces.Space],
non_lin: Union[str, type(nn.Module)]):
super().__init__()
self.obs_shapes = obs_shapes
# build perception part
self.perception_dict = OrderedDict()
self.perception_dict['latent-obs'] = DenseBlock(
in_keys="observation",
out_keys="latent-obs",
in_shapes=obs_shapes['observation'],
hidden_units=[256],
non_lin=non_lin)
self.perception_dict['latent-act'] = DenseBlock(
in_keys="action",
out_keys="latent-act",
in_shapes=obs_shapes['action'],
hidden_units=[256],
non_lin=non_lin)
self.perception_dict['concat'] = ConcatenationBlock(
in_keys=['latent-obs', 'latent-act'],
in_shapes=self.perception_dict['latent-obs'].out_shapes() +
self.perception_dict['latent-act'].out_shapes(),
concat_dim=-1,
out_keys='concat')
self.perception_dict['latent'] = DenseBlock(
in_keys="concat",
out_keys="latent",
in_shapes=self.perception_dict['concat'].out_shapes(),
hidden_units=[256],
non_lin=non_lin)
# build action head
self.perception_dict['q_value'] = LinearOutputBlock(
in_keys="latent",
out_keys="q_value",
in_shapes=self.perception_dict['latent'].out_shapes(),
output_units=1)
self.perception_net = InferenceBlock(
in_keys=['observation', 'action'],
out_keys='q_value',
in_shapes=[
self.obs_shapes['observation'], self.obs_shapes['action']
],
perception_blocks=self.perception_dict)
# initialize model weights
self.perception_net.apply(make_module_init_normc(1.0))
self.perception_dict['q_value'].apply(make_module_init_normc(0.01))
def build_perception_dict():
""" helper function """
obs_keys = ["obs_inventory", "obs_screen"]
in_dict = build_multi_input_dict(dims=[[1, 16], [1, 3, 64, 64]],
names=obs_keys)
perception_dict = dict()
# --- block ---
net = DenseBlock(in_keys="obs_inventory", out_keys="obs_inventory_latent",
in_shapes=[in_dict["obs_inventory"].shape[-1:]],
hidden_units=[32, 32],
non_lin=nn.ReLU)
perception_dict["obs_inventory_latent"] = net
# --- block ---
net = VGGConvolutionDenseBlock(in_keys="obs_screen", out_keys="obs_screen_latent",
in_shapes=[in_dict["obs_screen"].shape[-3:]],
hidden_channels=[8, 16, 32],
hidden_units=[32],
non_lin=nn.ReLU)
perception_dict["obs_screen_latent"] = net
# --- block ---
net = ConcatenationBlock(in_keys=list(perception_dict.keys()), out_keys="concat",
in_shapes=[(32,), (32,)], concat_dim=-1)
perception_dict["concat"] = net
# --- block ---
net = LinearOutputBlock(in_keys=["concat"], out_keys="action_move",
in_shapes=[(64,)], output_units=4)
perception_dict["action_move"] = net
# --- block ---
net = LinearOutputBlock(in_keys=["concat"], out_keys="action_use",
in_shapes=[(64,)], output_units=16)
perception_dict["action_use"] = net
return in_dict, perception_dict
def __init__(self, obs_shapes, action_logits_shapes, non_lin=nn.Tanh):
super().__init__()
# build perception part
self.perception_network = DenseBlock(in_keys="observation", out_keys="latent",
in_shapes=obs_shapes['observation'],
hidden_units=[32, 32], non_lin=non_lin)
module_init = make_module_init_normc(std=1.0)
self.perception_network.apply(module_init)
# build action head
self.action_head = LinearOutputBlock(in_keys="latent", out_keys="action",
in_shapes=self.perception_network.out_shapes(),
output_units=action_logits_shapes['action'][-1])
module_init = make_module_init_normc(std=0.01)
self.action_head.apply(module_init)
# compile inference model
self.net = InferenceBlock(in_keys="observation", out_keys="action", in_shapes=list(obs_shapes.values()),
perception_blocks={"latent": self.perception_network,
"action": self.action_head})
def __init__(self, obs_shapes: Dict[str, Sequence[int]],
non_lin: type(nn.Module)):
nn.Module.__init__(self)
self.obs_shapes = obs_shapes
perception_dict: Dict[str, PerceptionBlock] = dict()
for in_key, in_shape in self.obs_shapes.items():
if len(in_shape) > 1:
next_in_key = f'{in_key}_flat'
perception_dict[next_in_key] = FlattenBlock(
in_keys=in_key,
in_shapes=in_shape,
out_keys=next_in_key,
num_flatten_dims=len(in_shape))
next_in_shape = perception_dict[next_in_key].out_shapes()
else:
next_in_key = in_key
next_in_shape = in_shape
perception_dict[f'{in_key}_encoded_feat'] = DenseBlock(
in_keys=next_in_key,
in_shapes=next_in_shape,
out_keys=f'{in_key}_encoded_feat',
non_lin=non_lin,
hidden_units=[16])
perception_dict[f'{in_key}_encoded_layer'] = LinearOutputBlock(
in_keys=f'{in_key}_encoded_feat',
in_shapes=perception_dict[f'{in_key}_encoded_feat'].out_shapes(
),
out_keys=f'{in_key}_encoded_layer',
output_units=8)
concat_in_keys = [
key for key in perception_dict.keys() if '_encoded_layer' in key
]
perception_dict['hidden_out'] = ConcatenationBlock(
in_keys=concat_in_keys,
in_shapes=sum(
[perception_dict[key].out_shapes() for key in concat_in_keys],
[]),
out_keys='hidden_out',
concat_dim=-1)
self.perception_dict = perception_dict
def __init__(self, obs_shapes: Dict[str, Sequence[int]],
hidden_units: List[int], non_lin: nn.Module):
super().__init__(obs_shapes, hidden_units, non_lin)
# build action head
self.perception_dict["value"] = LinearOutputBlock(
in_keys="latent",
out_keys="value",
in_shapes=self.perception_dict["latent"].out_shapes(),
output_units=1)
module_init = make_module_init_normc(std=0.01)
self.perception_dict["value"].apply(module_init)
# compile inference model
self.net = InferenceBlock(in_keys=list(obs_shapes.keys()),
out_keys="value",
in_shapes=list(obs_shapes.values()),
perception_blocks=self.perception_dict)
def test_linear_output_block():
""" perception test """
in_dict = build_input_dict(dims=[100, 16])
net: LinearOutputBlock = LinearOutputBlock(in_keys="in_key",
out_keys="out_key",
in_shapes=(16, ),
output_units=10)
str(net)
out_dict = net(in_dict)
assert isinstance(out_dict, Dict)
assert set(net.out_keys).issubset(set(out_dict.keys()))
assert net.output_units == 10
assert out_dict[net.out_keys[0]].shape[-1] == net.output_units
assert net.out_shapes() == [out_dict[net.out_keys[0]].shape[-1:]]
# test bias setting
net.set_bias(bias=1)
assert np.allclose(net.net.bias.detach().numpy(), 1)
net.set_bias(bias=np.full(10, fill_value=2, dtype=np.float32))
assert np.allclose(net.net.bias.detach().numpy(), 2)
def template_value_net(
self,
observation_space: Optional[spaces.Dict],
shared_embedding_keys: List[str] = None,
perception_net: Optional[InferenceBlock] = None) -> InferenceBlock:
"""Compiles a template value network.
:param observation_space: The input observations for the perception network.
:param shared_embedding_keys: The shared embedding keys for this substep's model (input)
:param perception_net: The embedding network of the policy network if shared keys have been specified, in order
reuse the block and share the embedding.
:return: A value network (critic) InferenceBlock.
"""
shared_embedding_keys = [] if shared_embedding_keys is None else shared_embedding_keys
# # build perception net
if perception_net is None:
assert len(shared_embedding_keys) == 0
perception_net = self.template_perception_net(observation_space)
perception_dict = perception_net.perception_dict
inference_block_in_keys = perception_net.in_keys
inference_block_in_shapes = perception_net.in_shapes
else:
assert len(shared_embedding_keys) > 0
perception_dict = dict()
_block_not_present_in_perception_net = list(
filter(lambda x: x not in perception_net.perception_dict,
shared_embedding_keys))
assert len(_block_not_present_in_perception_net) == 0, \
f'All given latent keys, must be present in the default perception dict (created for the policy).' \
f'But the following keys {_block_not_present_in_perception_net} was not found.'
_blocks_with_more_outputs = list(
filter(
lambda x: len(perception_net.perception_dict[x].out_shapes(
)) > 1, shared_embedding_keys))
assert len(_blocks_with_more_outputs) == 0, \
f'All given latent keys, must refer to a block with only a single output. But the following keys ' \
f'have more than one output {_blocks_with_more_outputs}.'
new_perception_net = self.template_perception_net(
observation_space)
new_perception_dict = new_perception_net.perception_dict
start_adding_blocks = False
for idx, block_keys in perception_net.execution_plan.items():
if start_adding_blocks:
for block_key in block_keys:
perception_dict[block_key] = new_perception_dict[
block_key]
if any([
block_key in shared_embedding_keys
for block_key in block_keys
]):
assert all([[block_key in shared_embedding_keys for block_key in block_keys]]), \
f'In the template model composer, all shared embedding keys given must be on the same level' \
f'in the execution plan of the inference block.'
start_adding_blocks = True
inference_block_in_keys = shared_embedding_keys
inference_block_in_shapes = sum([
perception_net.perception_dict[key].out_shapes()
for key in shared_embedding_keys
], [])
# build value head
value_net = LinearOutputBlock(
in_keys="latent",
out_keys="value",
in_shapes=perception_net.perception_dict["latent"].out_shapes(),
output_units=1)
module_init = make_module_init_normc(std=0.01)
value_net.apply(module_init)
# extent perception dictionary
perception_dict["value"] = value_net
# compile inference model
net = InferenceBlock(in_keys=inference_block_in_keys,
out_keys="value",
in_shapes=inference_block_in_shapes,
perception_blocks=perception_dict)
return net
def __init__(self, obs_shapes: Dict[str, Sequence[int]],
action_logits_shapes: Dict[str, Sequence[int]],
non_lin: Union[str, type(nn.Module)], with_mask: bool):
nn.Module.__init__(self)
self.obs_shapes = obs_shapes
hidden_units, embedding_dim = 32, 7
self.perception_dict = OrderedDict()
# embed inventory
# ---------------
self.perception_dict['inventory_feat'] = DenseBlock(
in_keys='inventory',
out_keys='inventory_feat',
in_shapes=self.obs_shapes['inventory'],
hidden_units=[hidden_units],
non_lin=non_lin)
self.perception_dict['inventory_embed'] = LinearOutputBlock(
in_keys='inventory_feat',
out_keys='inventory_embed',
in_shapes=self.perception_dict['inventory_feat'].out_shapes(),
output_units=embedding_dim)
# embed ordered_piece
# ------------------_
self.perception_dict['order_unsqueezed'] = FunctionalBlock(
in_keys='ordered_piece',
out_keys='order_unsqueezed',
in_shapes=self.obs_shapes['ordered_piece'],
func=lambda x: torch.unsqueeze(x, dim=-2))
self.perception_dict['order_feat'] = DenseBlock(
in_keys='order_unsqueezed',
out_keys='order_feat',
in_shapes=self.perception_dict['order_unsqueezed'].out_shapes(),
hidden_units=[hidden_units],
non_lin=non_lin)
self.perception_dict['order_embed'] = LinearOutputBlock(
in_keys='order_feat',
out_keys='order_embed',
in_shapes=self.perception_dict['order_feat'].out_shapes(),
output_units=embedding_dim)
# compute dot product score
# -------------------------
in_shapes = self.perception_dict['inventory_embed'].out_shapes()
in_shapes += self.perception_dict['order_embed'].out_shapes()
out_key = 'corr_score' if with_mask else 'piece_idx'
self.perception_dict[out_key] = CorrelationBlock(
in_keys=['inventory_embed', 'order_embed'],
out_keys=out_key,
in_shapes=in_shapes,
reduce=True)
# apply action masking
if with_mask:
self.perception_dict['piece_idx'] = ActionMaskingBlock(
in_keys=['corr_score', 'inventory_mask'],
out_keys='piece_idx',
in_shapes=self.perception_dict['corr_score'].out_shapes() +
[self.obs_shapes['inventory_mask']],
num_actors=1,
num_of_actor_actions=None)
assert self.perception_dict['piece_idx'].out_shapes(
)[0][0] == action_logits_shapes['piece_idx'][0]
in_keys = ['ordered_piece', 'inventory']
if with_mask:
in_keys.append('inventory_mask')
self.perception_net = InferenceBlock(
in_keys=in_keys,
out_keys='piece_idx',
in_shapes=[self.obs_shapes[key] for key in in_keys],
perception_blocks=self.perception_dict)
# initialize model weights
self.perception_net.apply(make_module_init_normc(1.0))
self.perception_dict['inventory_embed'].apply(
make_module_init_normc(0.01))
self.perception_dict['order_embed'].apply(make_module_init_normc(0.01))
def __init__(self, obs_shapes: Dict[str, Sequence[int]],
action_logits_shapes: Dict[str, Sequence[int]],
non_lin: Union[str, type(nn.Module)], with_mask: bool):
nn.Module.__init__(self)
self.obs_shapes = obs_shapes
hidden_units = 32
self.perception_dict = OrderedDict()
self.perception_dict['selected_feat'] = DenseBlock(
in_keys='selected_piece',
out_keys='selected_feat',
in_shapes=self.obs_shapes['selected_piece'],
hidden_units=[hidden_units],
non_lin=non_lin)
self.perception_dict['order_feat'] = DenseBlock(
in_keys='ordered_piece',
out_keys='order_feat',
in_shapes=self.obs_shapes['ordered_piece'],
hidden_units=[hidden_units],
non_lin=non_lin)
self.perception_dict['latent'] = ConcatenationBlock(
in_keys=['selected_feat', 'order_feat'],
out_keys='latent',
in_shapes=[[hidden_units], [hidden_units]],
concat_dim=-1)
rotation_out_key = 'cut_rotation_logits' if with_mask else 'cut_rotation'
self.perception_dict[rotation_out_key] = LinearOutputBlock(
in_keys='latent',
out_keys=rotation_out_key,
in_shapes=self.perception_dict['latent'].out_shapes(),
output_units=action_logits_shapes['cut_rotation'][0])
if with_mask:
self.perception_dict['cut_rotation'] = ActionMaskingBlock(
in_keys=['cut_rotation_logits', 'cutting_mask'],
out_keys='cut_rotation',
in_shapes=self.perception_dict['cut_rotation_logits'].
out_shapes() + [self.obs_shapes['cutting_mask']],
num_actors=1,
num_of_actor_actions=None)
self.perception_dict['cut_order'] = LinearOutputBlock(
in_keys='latent',
out_keys='cut_order',
in_shapes=self.perception_dict['latent'].out_shapes(),
output_units=action_logits_shapes['cut_order'][0])
in_keys = ['selected_piece', 'ordered_piece']
if with_mask:
in_keys.append('cutting_mask')
self.perception_net = InferenceBlock(
in_keys=in_keys,
out_keys=['cut_rotation', 'cut_order'],
in_shapes=[self.obs_shapes[key] for key in in_keys],
perception_blocks=self.perception_dict)
# initialize model weights
self.perception_net.apply(make_module_init_normc(1.0))
self.perception_dict[rotation_out_key].apply(
make_module_init_normc(0.01))
self.perception_dict['cut_order'].apply(make_module_init_normc(0.01))
def template_q_value_net(
self,
observation_space: Optional[spaces.Dict],
action_space: spaces.Dict,
only_discrete_spaces: bool,
perception_net: Optional[InferenceBlock] = None) -> InferenceBlock:
"""Compiles a template state action (Q) value network.
:param observation_space: The input observations for the perception network.
:param action_space: The action space that defines the network action heads.
:param perception_net: A initial network to continue from.
(e.g. useful for shared weights. Model building continues from the key 'latent'.)
:param only_discrete_spaces: A dict specifying if the action spaces w.r.t. the step only hold discrete action
spaces.
:return: A q value network (critic) InferenceBlock.
"""
assert all(map(lambda space: isinstance(space, (spaces.Discrete, spaces.Box)),
action_space.spaces.values())), 'Only discrete and box spaces supported thus far for q values ' \
'critic.'
if not only_discrete_spaces:
discrete_space = list(
filter(
lambda kk: isinstance(action_space.spaces[kk], spaces.
Discrete), action_space.spaces))
if len(discrete_space) > 0:
new_action_space = {}
for key in action_space.spaces.keys():
if key in discrete_space:
new_action_space[key] = OneHotPreProcessor(
action_space.spaces[key]).processed_space()
else:
new_action_space[key] = action_space.spaces[key]
action_space = spaces.Dict(new_action_space)
observation_space = spaces.Dict({
**observation_space.spaces,
**action_space.spaces
})
value_heads = {'q_value': 1}
else:
value_heads = {
f'{act_key}_q_values': act_space.n
for act_key, act_space in action_space.spaces.items()
}
# check if actions are considered as observations for the state-action critic
for action_head in action_space.spaces.keys():
if action_head not in self.model_builder.observation_modality_mapping:
BColors.print_colored(
f'TemplateModelComposer: The action \'{action_head}\' could not be found in the '
f'model_builder.observation_modality_mapping and wont be considered '
f'as an input to the state-action critic!', BColors.FAIL)
# build perception net
if perception_net is None:
perception_net = self.template_perception_net(observation_space)
perception_dict = perception_net.perception_dict
for value_head, output_units in value_heads.items():
# initialize action head
value_net = LinearOutputBlock(
in_keys="latent",
out_keys=value_head,
in_shapes=perception_dict["latent"].out_shapes(),
output_units=output_units)
module_init = make_module_init_normc(std=0.01)
value_net.apply(module_init)
# extent perception dictionary
perception_dict[value_head] = value_net
# compile inference model
net = InferenceBlock(in_keys=perception_net.in_keys,
out_keys=list(value_heads.keys()),
in_shapes=perception_net.in_shapes,
perception_blocks=perception_dict)
return net