def test_autoregressive_connect_graph_dynamic():
graphs = GraphsTuple(nodes=tf.range(20),
n_node=tf.constant([12, 8]),
n_edge=tf.constant([0, 0]),
edges=None,
receivers=None,
senders=None,
globals=None)
graphs = GraphsTuple(nodes=tf.range(6),
n_node=tf.constant([6, 0]),
n_edge=tf.constant([0, 0]),
edges=None,
receivers=None,
senders=None,
globals=None)
graphs = autoregressive_connect_graph_dynamic(graphs,
exclude_self_edges=False)
import networkx as nx
G = nx.MultiDiGraph()
for sender, receiver in zip(graphs.senders.numpy(),
graphs.receivers.numpy()):
G.add_edge(sender, receiver)
nx.drawing.draw_circular(
G,
with_labels=True,
node_color=(0, 0, 0),
font_color=(1, 1, 1),
font_size=25,
node_size=1000,
arrowsize=30,
)
import pylab as plt
plt.show()
def test_batch_reshape():
data = dict(nodes=tf.reshape(tf.range(3 * 2), (3, 2)),
edges=tf.reshape(tf.range(40 * 5), (40, 5)),
senders=tf.random.uniform((40, ),
minval=0,
maxval=3,
dtype=tf.int32),
receivers=tf.random.uniform((40, ),
minval=0,
maxval=3,
dtype=tf.int32),
n_node=tf.constant([3]),
n_edge=tf.constant([40]),
globals=None)
graph = GraphsTuple(**data)
graphs = utils_tf.concat([graph] * 4, axis=0)
batched_graphs = graph_batch_reshape(graphs)
assert tf.reduce_all(
batched_graphs.nodes[0] == batched_graphs.nodes[1]).numpy()
assert tf.reduce_all(
batched_graphs.edges[0] == batched_graphs.edges[1]).numpy()
assert tf.reduce_all(
batched_graphs.senders[0] +
graphs.n_node[0] == batched_graphs.senders[1]).numpy()
assert tf.reduce_all(
batched_graphs.receivers[0] +
graphs.n_node[0] == batched_graphs.receivers[1]).numpy()
# print(batched_graphs)
unbatched_graphs = graph_unbatch_reshape(batched_graphs)
for (t1, t2) in zip(graphs, unbatched_graphs):
if t1 is not None:
assert tf.reduce_all(t1 == t2).numpy()
def _build(self, graph, crossing_steps):
n_non_components = graph.n_node
latent = self.node_block(graph)
for _ in range(self.num_components):
latent = self.edge_block(latent)
latent = self.global_block(latent)
component = latent.globals
new_nodes = tf.concat([latent.nodes, component], axis=0)
n_nodes = latent.n_node
new_senders = tf.concat([
tf.range(n_nodes + 1),
tf.fill(dims=(n_nodes + 1), value=n_nodes)
])
new_receivers = tf.reverse(new_senders, axis=0)
new_edges = tf.fill(dims=((n_nodes + 1)**2), value=0.)
n_edges = (n_nodes + 1)**2
latent = GraphsTuple(nodes=new_nodes,
edges=new_edges,
globals=None,
senders=new_senders,
receivers=new_receivers,
n_node=n_nodes + 1,
n_edge=n_edges)
gaussian_components = latent.nodes[n_non_components:]
return gaussian_components
def nearest_neighbours_connected_graph(virtual_positions, k):
kdtree = cKDTree(virtual_positions)
dist, idx = kdtree.query(virtual_positions, k=k + 1)
receivers = idx[:, 1:] # N,k
senders = np.arange(virtual_positions.shape[0]) # N
senders = np.tile(senders[:, None], [1, k]) # N,k
receivers = receivers.flatten()
senders = senders.flatten()
graph_nodes = tf.convert_to_tensor(virtual_positions, tf.float32)
graph_nodes.set_shape([None, 3])
receivers = tf.convert_to_tensor(receivers, tf.int32)
receivers.set_shape([None])
senders = tf.convert_to_tensor(senders, tf.int32)
senders.set_shape([None])
n_node = tf.shape(graph_nodes)[0:1]
n_edge = tf.shape(senders)[0:1]
graph_data_dict = dict(nodes=graph_nodes,
edges=tf.zeros((n_edge[0], 1)),
globals=tf.zeros([1]),
receivers=receivers,
senders=senders,
n_node=n_node,
n_edge=n_edge)
return GraphsTuple(**graph_data_dict)
def _init_call_func(self, observations, training=False):
"""Graph nets implementation."""
node_vals, edge_indices, node_to_graph, edge_vals = GraphObserver.graph(
observations=observations,
graph_dims=self._graph_dims,
dense=True)
batch_size = tf.shape(observations)[0]
node_counts = tf.unique_with_counts(node_to_graph)[2]
edge_counts = tf.math.square(node_counts)
input_graph = GraphsTuple(
nodes=tf.cast(node_vals, tf.float32),
edges=tf.cast(edge_vals, tf.float32),
globals=tf.tile([[0.]], [batch_size, 1]),
receivers=tf.cast(edge_indices[:, 1], tf.int32),
senders=tf.cast(edge_indices[:, 0], tf.int32),
n_node=node_counts,
n_edge=edge_counts)
self._latent_trace = []
latent = input_graph
for gb in self._graph_blocks:
latent = gb(latent)
self._latent_trace.append(latent)
node_values = tf.reshape(latent.nodes, [batch_size, -1, self._embedding_size])
return node_values
def build_dataset(data_dir):
"""
Build data set from a directory of tfrecords.
Args:
data_dir: str, path to *.tfrecords
Returns: Dataset obj.
"""
tfrecords = glob.glob(os.path.join(data_dir, '*.tfrecords'))
dataset = tf.data.TFRecordDataset(tfrecords).map(partial(decode_examples_old,
node_shape=(11,),
image_shape=(256, 256, 1))) # (graph, image, spsh, proj)
_graphs = dataset.map(lambda graph_data_dict, img, spsh, proj: (graph_data_dict, spsh, proj)).shuffle(buffer_size=50)
_images = dataset.map(lambda graph_data_dict, img, spsh, proj: (img, spsh, proj)).shuffle(buffer_size=50)
shuffled_dataset = tf.data.Dataset.zip((_graphs, _images)) # ((graph_data_dict, idx1), (img, idx2))
shuffled_dataset = shuffled_dataset.map(lambda ds1, ds2: (ds1[0], ds2[0], (ds1[1] == ds2[1]) and
(ds1[2] == ds2[2]))) # (graph, img, yes/no)
shuffled_dataset = shuffled_dataset.filter(lambda graph_data_dict, img, c: ~c)
shuffled_dataset = shuffled_dataset.map(lambda graph_data_dict, img, c: (graph_data_dict, img, tf.cast(c, tf.int32)))
nonshuffeled_dataset = dataset.map(
lambda graph_data_dict, img, spsh, proj : (graph_data_dict, img, tf.constant(1, dtype=tf.int32))) # (graph, img, yes)
dataset = tf.data.experimental.sample_from_datasets([shuffled_dataset, nonshuffeled_dataset])
dataset = dataset.map(lambda graph_data_dict, img, c: (GraphsTuple(**graph_data_dict), img, c))
# dataset = batch_dataset_set_graph_tuples(all_graphs_same_size=True, dataset=dataset, batch_size=16)
return dataset
def build_dataset(data_dir):
"""
Build data set from a directory of tfrecords.
Args:
data_dir: str, path to *.tfrecords
Returns: Dataset obj.
"""
tfrecords = glob.glob(os.path.join(data_dir, '*.tfrecords'))
dataset = tf.data.TFRecordDataset(tfrecords).map(
partial(decode_examples, node_shape=(4, ),
image_shape=(18, 18, 1))) # (graph_data_dict, image, idx)
_graphs = dataset.map(lambda graph_data_dict, img, idx:
(graph_data_dict, idx)).shuffle(buffer_size=50)
_images = dataset.map(lambda graph_data_dict, img, idx:
(img, idx)).shuffle(buffer_size=50)
shuffled_dataset = tf.data.Dataset.zip(
(_graphs, _images)) # ((graph_data_dict, idx1), (img, idx2))
shuffled_dataset = shuffled_dataset.map(
lambda ds1, ds2:
(ds1[0], ds2[0], ds1[1] == ds2[1])) # (graph, img, yes/no)
shuffled_dataset = shuffled_dataset.filter(lambda graph, img, c: ~c)
shuffled_dataset = shuffled_dataset.map(lambda graph_data_dict, img, c: (
graph_data_dict, img, tf.cast(c, tf.int32)))
nonshuffeled_dataset = dataset.map(
lambda graph_data_dict, img, idx:
(graph_data_dict, img, tf.constant(1, dtype=tf.int32)
)) # (graph, img, yes)
dataset = tf.data.experimental.sample_from_datasets(
[shuffled_dataset, nonshuffeled_dataset])
dataset = dataset.map(lambda graph_data_dict, img, c: (GraphsTuple(
globals=None, edges=None, **graph_data_dict), img, c))
return dataset
def construct_input_graph(self, input_sequence, N2):
G, N = get_shape(input_sequence)
# num_samples*batch, 1 + H2*W2 + 1 + H3*W3*D3, embedding_dim
input_tokens = tf.nn.embedding_lookup(self.embeddings, input_sequence)
self.initialize_positional_encodings(input_tokens)
nodes = input_tokens + self.positional_encodings
n_node = tf.fill([G], N)
n_edge = tf.zeros_like(n_node)
data_dict = dict(nodes=nodes, edges=None, senders=None, receivers=None, globals=None,
n_node=n_node,
n_edge=n_edge)
concat_graphs = GraphsTuple(**data_dict)
concat_graphs = graph_unbatch_reshape(concat_graphs) # [n_graphs * (num_input + num_output), embedding_size]
# nodes, senders, receivers, globals
def edge_connect_rule(sender, receiver):
# . a . b -> a . b .
complete_2d = (sender < N2 + 1) & (receiver < N2 + 1) & (
sender + 1 != receiver) # exclude senders from one-right, so it doesn't learn copy.
auto_regressive_3d = (sender <= receiver) & (
receiver >= N2 + 1) # auto-regressive (excluding 2d) with self-loops
return complete_2d | auto_regressive_3d
# nodes, senders, receivers, globals
concat_graphs = connect_graph_dynamic(concat_graphs, edge_connect_rule)
return concat_graphs
def test_kgcn_runs(self):
tf.enable_eager_execution()
graph = GraphsTuple(
nodes=tf.convert_to_tensor(
np.array([[1, 2, 0], [1, 0, 0], [1, 1, 0]], dtype=np.float32)),
edges=tf.convert_to_tensor(
np.array([[1, 0, 0], [1, 0, 0]], dtype=np.float32)),
globals=tf.convert_to_tensor(
np.array([[0, 0, 0, 0, 0]], dtype=np.float32)),
receivers=tf.convert_to_tensor(np.array([1, 2], dtype=np.int32)),
senders=tf.convert_to_tensor(np.array([0, 1], dtype=np.int32)),
n_node=tf.convert_to_tensor(np.array([3], dtype=np.int32)),
n_edge=tf.convert_to_tensor(np.array([2], dtype=np.int32)))
attr_embedders = {
lambda: lambda x: tf.constant(np.zeros((3, 6), dtype=np.float32)):
[0, 1, 2]
}
kgcn = KGCN(3,
2,
5,
6,
attr_embedders,
edge_output_size=3,
node_output_size=3)
kgcn(graph, 2)
def test_kgcn_runs(self):
tf.enable_eager_execution()
graph = GraphsTuple(
nodes=tf.convert_to_tensor(
np.array([[1, 2, 0], [1, 0, 0], [1, 1, 0]], dtype=np.float32)),
edges=tf.convert_to_tensor(
np.array([[1, 0, 0], [1, 0, 0]], dtype=np.float32)),
globals=tf.convert_to_tensor(
np.array([[0, 0, 0, 0, 0]], dtype=np.float32)),
receivers=tf.convert_to_tensor(np.array([1, 2], dtype=np.int32)),
senders=tf.convert_to_tensor(np.array([0, 1], dtype=np.int32)),
n_node=tf.convert_to_tensor(np.array([3], dtype=np.int32)),
n_edge=tf.convert_to_tensor(np.array([2], dtype=np.int32)))
thing_embedder = ThingEmbedder(node_types=['a', 'b', 'c'],
type_embedding_dim=5,
attr_embedding_dim=6,
categorical_attributes={
'a': ['a1', 'a2', 'a3'],
'b': ['b1', 'b2', 'b3']
},
continuous_attributes={'c': (0, 1)})
role_embedder = RoleEmbedder(num_edge_types=2, type_embedding_dim=5)
kgcn = KGCN(thing_embedder,
role_embedder,
edge_output_size=3,
node_output_size=3)
kgcn(graph, 2)
def test_plot_is_created(self):
num_processing_steps_ge = 6
graph = nx.MultiDiGraph(name=0)
existing = dict(solution=0)
to_infer = dict(solution=2)
candidate = dict(solution=1)
# people
graph.add_node(0, type='person', **existing)
graph.add_node(1, type='person', **candidate)
# parentships
graph.add_node(2, type='parentship', **to_infer)
graph.add_edge(2, 0, type='parent', **to_infer)
graph.add_edge(2, 1, type='child', **candidate)
graph_tuple_target = GraphsTuple(nodes=np.array([[1., 0., 0.],
[0., 1., 0.],
[0., 0., 1.]]),
edges=np.array([[0., 0., 1.],
[0., 1., 0.]]),
receivers=np.array([1, 2], dtype=np.int32),
senders=np.array([0, 1], dtype=np.int32),
globals=np.array([[0., 0., 0., 0., 0.]], dtype=np.float32),
n_node=np.array([3], dtype=np.int32),
n_edge=np.array([2], dtype=np.int32))
graph_tuple_output = GraphsTuple(nodes=np.array([[1., 0., 0.],
[1., 1., 0.],
[1., 0., 1.]]),
edges=np.array([[1., 0., 0.],
[1., 1., 0.]]),
receivers=np.array([1, 2], dtype=np.int32),
senders=np.array([0, 1], dtype=np.int32),
globals=np.array([[0., 0., 0., 0., 0.]], dtype=np.float32),
n_node=np.array([3], dtype=np.int32),
n_edge=np.array([2], dtype=np.int32))
test_values = {"target": graph_tuple_target, "outputs": [graph_tuple_output for _ in range(6)]}
filename = f'./graph_{datetime.datetime.now()}.png'
plot_predictions([graph], test_values, num_processing_steps_ge, output_file=filename)
self.assertTrue(os.path.isfile(filename))
def build_dataset(tfrecords):
# Extract the dataset (graph tuple, image, example_idx) from the tfrecords files
dataset = tf.data.TFRecordDataset(tfrecords).map(
partial(decode_examples,
node_shape=(10, ),
edge_shape=(2, ),
image_shape=(1000, 1000, 1))) # (graph, image, idx)
# Take the graphs and their corresponding index and shuffle the order of these pairs
# Do the same for the images
_graphs = dataset.map(
lambda graph_data_dict, img, cluster_idx, projection_idx, vprime:
(graph_data_dict, 26 * cluster_idx + projection_idx)).shuffle(
buffer_size=260) # .replace(globals=tf.zeros((1, 1)))
_images = dataset.map(
lambda graph_data_dict, img, cluster_idx, projection_idx, vprime:
(img, 26 * cluster_idx + projection_idx)).shuffle(buffer_size=260)
# Zip the shuffled datasets back together so typically the index of the graph and image don't match.
shuffled_dataset = tf.data.Dataset.zip(
(_graphs, _images)) # ((graph, idx1), (img, idx2))
# Reshape the dataset to the graph, the image and a yes or no whether the indices are the same
# So ((graph, idx1), (img, idx2)) --> (graph, img, True/False)
shuffled_dataset = shuffled_dataset.map(
lambda ds1, ds2:
(ds1[0], ds2[0], ds1[1] == ds2[1])) # (graph, img, yes/no)
# Take the subset of the data where the graph and image don't correspond (which is most of the dataset, since it's shuffled)
shuffled_dataset = shuffled_dataset.filter(
lambda graph_data_dict, img, c: ~c)
# Transform the True/False class into 1/0 integer
shuffled_dataset = shuffled_dataset.map(lambda graph_data_dict, img, c: (
GraphsTuple(**graph_data_dict), img, tf.cast(c, tf.int32)))
# Use the original dataset where all indices correspond and give them class True and turn that into an integer
# So every instance gets class 1
nonshuffeled_dataset = dataset.map(
lambda graph_data_dict, img, cluster_idx, projection_idx, vprime:
(GraphsTuple(**graph_data_dict), img, tf.constant(1, dtype=tf.int32)
)) # (graph, img, yes)
# For the training data, take a sample either from the correct or incorrect combinations of graphs and images
nn_dataset = tf.data.experimental.sample_from_datasets(
[shuffled_dataset, nonshuffeled_dataset])
return nn_dataset
def destandardize_graphs_tuple(self, graphs: GraphsTuple) -> GraphsTuple:
standard_graphs = graphs.replace(globals=self._destandardize(
graphs.globals, mean=self.global_mean, std=self.global_std))
standard_graphs = standard_graphs.replace(nodes=self._destandardize(
graphs.nodes, mean=self.nodes_mean, std=self.nodes_std))
standard_graphs = standard_graphs.replace(edges=self._destandardize(
graphs.edges, mean=self.edges_mean, std=self.edges_std))
return standard_graphs
def _build(self, graph: GraphsTuple, num_processing_steps):
# give edges and globals to graph from nodes
graph = self._first_block(graph)
output = []
for i in range(num_processing_steps):
graph = self._message_passing_graph(graph)
graph = graph._replace(globals=self._global_block(graph).globals +
graph.globals)
output.append(graph)
return output
def _get_graph_tuple(input_tensors: List[tf.Tensor]) -> GraphsTuple:
return GraphsTuple(
nodes=input_tensors[0],
edges=input_tensors[1],
senders=input_tensors[2],
receivers=input_tensors[3],
globals=tf.expand_dims(input_tensors[4], axis=0),
n_node=tf.convert_to_tensor([input_tensors[0].shape[0]]),
n_edge=tf.convert_to_tensor([input_tensors[1].shape[0]]),
)
def _build(self, graph: GraphsTuple, positions: GraphsTuple,
num_processing_steps):
# give edges and globals to graph from nodes
graph = self._first_block(graph)
outputs = []
for i in range(num_processing_steps):
graph = graph._replace(
nodes=tf.concat([positions.nodes, graph.nodes], axis=-1))
graph = self._message_passing_graph(graph)
outputs.append(self._property_block(graph))
return outputs
def _build(self, batch, *args, **kwargs):
(graph, img, c) = batch
del c
# The encoded cluster graph has globals which can be compared against the encoded image graph
encoded_graph = self.epd_graph(graph, self._core_steps)
# Add an extra dimension to the image (tf.summary expects a Tensor of rank 4)
img = img[None, ...]
im_before_cnn = (img - tf.reduce_min(img)) / (tf.reduce_max(img) - tf.reduce_min(img))
tf.summary.image(f'img_before_cnn', im_before_cnn, step=self.step)
img = self.auto_encoder.encoder(img)
# Prevent the autoencoder from learning
try:
for variable in self.auto_encoder.encoder.trainable_variables:
variable._trainable = False
for variable in self.auto_encoder.decoder.trainable_variables:
variable._trainable = False
except:
pass
img_after_autoencoder = (img - tf.reduce_min(img)) / (tf.reduce_max(img) - tf.reduce_min(img))
tf.summary.image(f'img_after_autoencoder', tf.transpose(img_after_autoencoder, [3, 1, 2, 0]), step=self.step)
decoded_img = self.auto_encoder.decoder(img)
decoded_img = (decoded_img - tf.reduce_min(decoded_img)) / (tf.reduce_max(decoded_img) - tf.reduce_min(decoded_img))
tf.summary.image(f'decoded_img', decoded_img, step=self.step)
# Reshape the encoded image so it can be used for the nodes
#1, w,h,c -> w*h, c
nodes = tf.reshape(img, (-1,self.image_feature_size))
# Create a graph that has a node for every encoded pixel. The features of each node
# are the channels of the corresponding pixel. Then connect each node with every other
# node.
img_graph = GraphsTuple(nodes=nodes,
edges=None,
globals=None,
receivers=None,
senders=None,
n_node=tf.shape(nodes)[0:1],
n_edge=tf.constant([0]))
connected_graph = fully_connect_graph_dynamic(img_graph)
# The encoded image graph has globals which can be compared against the encoded cluster graph
encoded_img = self.epd_image(connected_graph, 1)
# Compare the globals from the encoded cluster graph and encoded image graph
# to estimate the similarity between the input graph and input image
distance = self.compare(tf.concat([encoded_graph.globals, encoded_img.globals], axis=1)) + self.compare(
tf.concat([encoded_img.globals, encoded_graph.globals], axis=1))
return distance
def _build_dataset(data_dir):
tfrecords = glob.glob(os.path.join(data_dir, '*.tfrecords'))
dataset = tf.data.TFRecordDataset(tfrecords).map(
partial(decode_examples_old,
node_shape=(11, ),
image_shape=(256, 256, 1))) # (graph, image, spsh, proj)
dataset = dataset.map(lambda graph_data_dict, img, spsh, proj:
(GraphsTuple(**graph_data_dict), img))
return dataset
def build_dataset(data_dir, batch_size):
tfrecords = glob.glob(os.path.join(data_dir, '*.tfrecords'))
dataset = tf.data.TFRecordDataset(tfrecords).map(
lambda record_bytes: decode_examples(record_bytes, node_shape=[4]))
dataset = dataset.map(lambda graph_data_dict, img, c: GraphsTuple(
globals=tf.zeros([1]), edges=None, **graph_data_dict))
dataset = dataset.map(lambda graph: graph._replace(nodes=tf.concat(
[graph.nodes[:, :3],
tf.math.log(graph.nodes[:, 3:])], axis=1)))
dataset = dataset.map(lambda graph: (graph, ))
# dataset = batch_dataset_set_graph_tuples(all_graphs_same_size=True, dataset=dataset, batch_size=batch_size)
return dataset
def to_placeholders(self, batch_size=None):
"""Creates a placeholder to be fed into a graph_net"""
# pylint: disable=protected-access
placeholders = utils_tf._build_placeholders_from_specs(
dtypes=GraphsTuple(
nodes=tf.float64,
edges=tf.float64,
receivers=tf.int32,
senders=tf.int32,
globals=tf.float64,
n_node=tf.int32,
n_edge=tf.int32,
),
shapes=GraphsTuple(
nodes=[batch_size, self.node_dim],
edges=[batch_size, self.edge_dim],
receivers=[batch_size],
senders=[batch_size],
globals=[batch_size, self.global_dim],
n_node=[batch_size],
n_edge=[batch_size],
),
)
def make_feed_dict(val):
if isinstance(val, GraphsTuple):
graphs_tuple = val
else:
dicts = []
for graphs_tuple in val:
dicts.append(
utils_np.graphs_tuple_to_data_dicts(graphs_tuple)[0])
graphs_tuple = utils_np.data_dicts_to_graphs_tuple(dicts)
return utils_tf.get_feed_dict(placeholders, graphs_tuple)
placeholders.make_feed_dict = make_feed_dict
placeholders.name = "Graph observation placeholder"
return placeholders
def build_dataset(tfrecords_dirs, batch_size, type='train'):
"""
Build data set from a directory of tfrecords. With graph batching
Args:
data_dir: str, path to *.tfrecords
Returns: Dataset obj.
"""
tfrecords = []
for tfrecords_dir in tfrecords_dirs:
tfrecords += glob.glob(os.path.join(tfrecords_dir, type,
'*.tfrecords'))
random.shuffle(tfrecords)
print(f'Number of {type} tfrecord files : {len(tfrecords)}')
dataset = tf.data.TFRecordDataset(tfrecords).map(
partial(decode_examples,
node_shape=(10, ),
edge_shape=(2, ),
image_shape=(256, 256, 1))) # (graph, image, idx)
dataset = dataset.map(
lambda graph_data_dict, img, cluster_idx, projection_idx, vprime:
(GraphsTuple(**graph_data_dict).replace(nodes=tf.concat([
GraphsTuple(**graph_data_dict).nodes[:, :3],
GraphsTuple(**graph_data_dict).nodes[:, 6:8]
],
axis=-1)),
gaussian_filter2d(img))).shuffle(buffer_size=52).batch(
batch_size=batch_size)
return dataset
def test_compute_accuracy_is_as_expected(self):
t_nodes = np.array([[1, 0], [1, 0], [0, 1]], dtype=np.float32)
o_nodes = np.array([[0, 1], [1, 0], [1, 0]], dtype=np.float32)
t_edges = np.array([[0, 1], [1, 0]], dtype=np.float32)
o_edges = np.array([[1, 0], [1, 0]], dtype=np.float32)
globals = None
senders = np.array([0, 1])
receivers = np.array([1, 2])
n_node = np.array([3])
n_edge = np.array([2])
target = GraphsTuple(nodes=t_nodes,
edges=t_edges,
globals=globals,
receivers=receivers,
senders=senders,
n_node=n_node,
n_edge=n_edge)
output = GraphsTuple(nodes=o_nodes,
edges=o_edges,
globals=globals,
receivers=receivers,
senders=senders,
n_node=n_node,
n_edge=n_edge)
correct, solved = compute_accuracy(target, output)
expected_correct = 2 / 5
expected_solved = 0
self.assertEqual(expected_correct, correct)
self.assertEqual(expected_solved, solved)
def connect_graph_dynamic(graph: GraphsTuple, is_edge_func, name="connect_graph_dynamic"):
"""
Connects a graph using a boolean edge mask to create edges.
Args:
graph: GraphsTuple
is_edge_func: callable(sender: int, receiver: int) -> bool, should broadcast
name:
Returns:
connected GraphsTuple
"""
utils_tf._validate_edge_fields_are_all_none(graph)
with tf.name_scope(name):
def body(i, senders, receivers, n_edge):
edges = _create_functional_connect_edges_dynamic(graph.n_node[i], is_edge_func)
# edges = create_edges_func(graph.n_node[i])
return (i + 1, senders.write(i, edges['senders']),
receivers.write(i, edges['receivers']),
n_edge.write(i, edges['n_edge']))
num_graphs = utils_tf.get_num_graphs(graph)
loop_condition = lambda i, *_: tf.less(i, num_graphs)
initial_loop_vars = [0] + [
tf.TensorArray(dtype=tf.int32, size=num_graphs, infer_shape=False)
for _ in range(3) # senders, receivers, n_edge
]
_, senders_array, receivers_array, n_edge_array = tf.while_loop(loop_condition, body, initial_loop_vars)
n_edge = n_edge_array.concat()
offsets = utils_tf._compute_stacked_offsets(graph.n_node, n_edge)
senders = senders_array.concat() + offsets
receivers = receivers_array.concat() + offsets
senders.set_shape(offsets.shape)
receivers.set_shape(offsets.shape)
receivers.set_shape([None])
senders.set_shape([None])
num_graphs = graph.n_node.get_shape().as_list()[0]
n_edge.set_shape([num_graphs])
return graph.replace(senders=tf.stop_gradient(senders),
receivers=tf.stop_gradient(receivers),
n_edge=tf.stop_gradient(n_edge))
def sample_decoder(self, positions, logits, temperature):
token_distribution = tfp.distributions.RelaxedOneHotCategorical(temperature, logits=logits)
token_samples_onehot = token_distribution.sample((1,),
name='token_samples')
token_sample_onehot = token_samples_onehot[0] # [n_node, num_embedding]
token_sample = tf.matmul(token_sample_onehot, self.embeddings) # [n_node, embedding_dim]
n_node = tf.shape(token_sample)[0]
latent_graph = GraphsTuple(nodes=token_sample,
edges=None,
globals=tf.constant([0.], dtype=tf.float32),
senders=None,
receivers=None,
n_node=tf.constant([n_node], dtype=tf.int32),
n_edge=tf.constant([0], dtype=tf.int32)) # [n_node, embedding_dim]
latent_graph = fully_connect_graph_dynamic(latent_graph)
gaussian_tokens = self.decoder(latent_graph) # nodes=[num_gaussian_components, component_dim]
reconstructed_fields = reconstruct_fields_from_gaussians(gaussian_tokens, positions)
return reconstructed_fields
def build_dataset(data_dir, batch_size):
tfrecords = glob.glob(os.path.join(data_dir, '*.tfrecords'))
dataset = tf.data.TFRecordDataset(tfrecords).map(partial(decode_examples,
node_shape=(11,),
image_shape=(256, 256, 1),
k=6)) # (graph, image, spsh, proj)
dataset = dataset.map(lambda graph_data_dict, img, spsh, proj, e: (graph_data_dict, img))
dataset.batch(batch_size)
#batch fixing mechanism
dataset = dataset.map(lambda data_dict, image: (batch_graph_data_dict(data_dict), image))
dataset = dataset.map(lambda data_dict, image: (GraphsTuple(**data_dict,
edges=None, receivers=None, senders=None, globals=None), image))
dataset = dataset.map(lambda batched_graphs, image: (graph_unbatch_reshape(batched_graphs), image))
# dataset = dataset.cache()
return dataset
def _single_decode(token_sample_onehot):
"""
Args:
token_sample: [n_node, embedding_dim]
Returns:
log_likelihood: scalar
kl_term: scalar
"""
token_sample = tf.matmul(
token_sample_onehot,
self.embeddings) # [n_node, embedding_dim] # = z ~ q(z|x)
latent_graph = GraphsTuple(
nodes=token_sample,
edges=None,
globals=tf.constant([0.], dtype=tf.float32),
senders=None,
receivers=None,
n_node=encoded_graph.n_node,
n_edge=tf.constant([0],
dtype=tf.int32)) # [n_node, embedding_dim]
latent_graph = fully_connect_graph_dynamic(latent_graph)
# print('\n latent_graph', latent_graph, '\n')
gaussian_tokens = self.decoder(
latent_graph) # nodes=[num_gaussian_components, component_dim]
# print('\n gaussian_tokens_nodes', gaussian_tokens.nodes, '\n')
_, log_likelihood = gaussian_loss_function(gaussian_tokens.nodes,
graph)
# [n_node, num_embeddings].[n_node, num_embeddings]
sum_selected_logits = tf.math.reduce_sum(token_sample_onehot *
logits,
axis=1) # [n_node]
# print('sum', sum_selected_logits)
# print('norm', log_norm)
# print('num_embed', tf.cast(self.num_embedding, tf.float32))
# print('embed', tf.math.log(tf.cast(self.num_embedding, tf.float32)))
kl_term = sum_selected_logits - self.num_embedding * log_norm + \
self.num_embedding * tf.math.log(tf.cast(self.num_embedding, tf.float32))
# print('kl_term 0', kl_term)
# print('kl_term', tf.reduce_mean(kl_term))
kl_term = self.beta * tf.reduce_mean(kl_term)
return log_likelihood, kl_term
def decode_examples(record_bytes, node_shape=None, edge_shape=None, image_shape=None):
"""
Decodes raw bytes as returned from tf.data.TFRecordDataset([example_path]) into a GraphTuple and image
Args:
record_bytes: raw bytes
node_shape: shape of nodes if known.
edge_shape: shape of edges if known.
image_shape: shape of image if known.
Returns: (GraphTuple, image)
"""
parsed_example = tf.io.parse_single_example(
# Data
record_bytes,
# Schema
dict(
image=tf.io.FixedLenFeature([], dtype=tf.string),
**feature_to_graph_tuple('graph')
)
)
image = tf.io.parse_tensor(parsed_example['image'], tf.float32)
image.set_shape(image_shape)
graph_nodes = tf.io.parse_tensor(parsed_example['graph_nodes'], tf.float32)
if node_shape is not None:
graph_nodes.set_shape([None] + list(node_shape))
graph_edges = tf.io.parse_tensor(parsed_example['graph_edges'], tf.float32)
if edge_shape is not None:
graph_edges.set_shape([None] + list(edge_shape))
receivers = tf.io.parse_tensor(parsed_example['graph_receivers'], tf.int64)
receivers.set_shape([None])
senders = tf.io.parse_tensor(parsed_example['graph_senders'], tf.int64)
senders.set_shape([None])
graph = GraphsTuple(nodes=graph_nodes,
edges=graph_edges,
globals=None,
receivers=receivers,
senders=senders,
n_node=tf.shape(graph_nodes)[0:1],
n_edge=tf.shape(graph_edges)[0:1])
return (graph, image)
def apply_random_rotation(graph: graphs.GraphsTuple) -> graphs.GraphsTuple:
"""Returns randomly rotated graph representation.
The rotation is an element of O(3) with rotation angles multiple of pi/2.
This function assumes that the relative particle distances are stored in
the edge features.
Args:
graph: The graphs tuple as defined in `graph_nets.graphs`.
"""
# Transposes edge features, so that the axes are in the first dimension.
# Outputs a tensor of shape [3, n_particles].
xyz = tf.transpose(graph.edges)
# Random pi/2 rotation(s)
permutation = tf.random.shuffle(tf.constant([0, 1, 2], dtype=tf.int32))
xyz = tf.gather(xyz, permutation)
# Random reflections.
symmetry = tf.random_uniform([3], minval=0, maxval=2, dtype=tf.int32)
symmetry = 1 - 2 * tf.cast(tf.reshape(symmetry, [3, 1]), tf.float32)
xyz = xyz * symmetry
edges = tf.transpose(xyz)
return graph.replace(edges=edges)
def _build(self, batch, *args, **kwargs):
(graph, img, c) = batch
del c
encoded_graph = self.encoder_graph(graph)
tf.summary.image(f'img_before_cnn', img[None, ...], step=self.step)
img = self.image_cnn(img[None, ...])
for channel in range(img.shape[-1]):
tf.summary.image(f'img_after_cnn[{channel}]',
img[..., channel:channel + 1],
step=self.step)
#1, w,h,c -> w*h, c
nodes = tf.reshape(img, (-1, self.image_feature_size))
img_graph = GraphsTuple(nodes=nodes,
edges=None,
globals=None,
receivers=None,
senders=None,
n_node=tf.shape(nodes)[0:1],
n_edge=tf.constant([0]))
connected_graph = fully_connect_graph_dynamic(img_graph)
encoded_img = self.encoder_image(connected_graph)
return self.compare(
tf.concat([encoded_graph.globals, encoded_img.globals],
axis=1)) #[1]
def build_dataset(tfrecords, batch_size):
"""
Build data set from a directory of tfrecords. With graph batching
Args:
data_dir: str, path to *.tfrecords
Returns: Dataset obj.
"""
dataset = tf.data.TFRecordDataset(tfrecords).map(
partial(decode_examples,
node_shape=(10, ),
edge_shape=(2, ),
image_shape=(1024, 1024, 1))) # (graph, image, idx)
dataset = dataset.map(lambda graph_data_dict, img, cluster_idx,
projection_idx, vprime: graph_data_dict).shuffle(
buffer_size=50)
dataset = dataset.map(
lambda graph_data_dict: GraphsTuple(**graph_data_dict))
# dataset = batch_dataset_set_graph_tuples(all_graphs_same_size=True, dataset=dataset, batch_size=batch_size)
return dataset