def train(self):
train_losses = []
val_losses = []
model_path = os.path.join(self.model_dir, self.model_file)
print("Training model...\n")
timer = Timer()
timer.tic()
x = self.data.x.to(self.device)
train_pos_edge_index = self.data.train_pos_edge_index.to(self.device)
for epoch in range(self.epochs):
print("Epoch: {}".format(epoch + 1))
self.model.train()
self.optimizer.zero_grad()
z = self.model.encode(x, train_pos_edge_index)
loss = self.model.recon_loss(z, train_pos_edge_index)
if self.model_name == "ARGVA":
loss = loss + (1 / self.data.num_nodes) * self.model.kl_loss()
loss += self.dis_loss_para * self.model.discriminator_loss(z) + \
self.reg_loss_para * self.model.reg_loss(z)
loss.backward()
self.optimizer.step()
# Evaluate on validation data
self.model.eval()
with torch.no_grad():
train_losses.append(loss.cpu().detach().numpy())
# Compute validation statistics
val_pos_edge_index = self.data.val_pos_edge_index.to(
self.device)
val_neg_edge_index = self.data.val_neg_edge_index.to(
self.device)
z = self.model.encode(x, train_pos_edge_index)
val_loss = self.model.recon_loss(z, train_pos_edge_index)
if self.model_name == "ARGVA":
val_loss += (1 /
self.data.num_nodes) * self.model.kl_loss()
val_loss += self.dis_loss_para * self.model.discriminator_loss(
z) + self.reg_loss_para * self.model.reg_loss(z)
val_losses.append(val_loss.cpu().detach().numpy())
if val_losses[-1] == min(val_losses):
print("\tSaving model...")
torch.save(self.model.state_dict(), model_path)
print("\tSaved.")
print("\ttrain_loss=", "{:.5f}".format(loss), "val_loss=",
"{:.5f}".format(val_loss))
print("Finished training.\n")
training_time = timer.toc()
self._plot_losses(train_losses, val_losses)
self._print_stats(train_losses, val_losses, training_time)
def __init__(self, embedding_type, gpu=0):
os.environ["CUDA_DEVICE_ORDER"] = "PCI_BUS_ID"
os.environ["CUDA_VISIBLE_DEVICES"] = str(gpu)
self.embedding_type = embedding_type
self.embeddings_parser = EmbeddingsParser(gpu)
self.timer = Timer()
self.path_persistent = os.path.join(
os.path.dirname(os.path.realpath(__file__)), "..", "..", "..",
"data", "interim", "han", self.embedding_type)
if not os.path.exists(self.path_persistent):
os.makedirs(self.path_persistent)
def __init__(self, embedding_type, graph_type, threshold=2, gpu=0):
os.environ["CUDA_DEVICE_ORDER"] = "PCI_BUS_ID"
os.environ["CUDA_VISIBLE_DEVICES"] = str(gpu)
self.embedding_type = embedding_type
self.graph_type = graph_type
self.threshold = threshold
self.embeddings_parser = EmbeddingsParser(gpu)
self.timer = Timer()
self.path_persistent = os.path.join(
os.path.dirname(os.path.realpath(__file__)), "..", "..", "..",
"data", "interim", "graphsage", self.embedding_type,
self.graph_type)
if not os.path.isdir(self.path_persistent):
os.mkdir(self.path_persistent)
def __init__(self):
self.parser = FileParser()
self.persistent = {}
self.timer = Timer()
self.processes = {
"chapters_books": {
"process_data": "_process_data_chapters_books",
"persistent_file": os.path.join(self.path,
"chapters_books.pkl")
},
"chapters_all_scigraph_citations": {
"process_data":
"_process_data_chapters_all_scigraph_citations",
"persistent_file":
os.path.join(self.path, "chapters_all_scigraph_citations.pkl")
},
"chapters_confproc_scigraph_citations": {
"process_data":
"_process_data_chapters_confproc_scigraph_citations",
"persistent_file":
os.path.join(self.path,
"chapters_confproc_scigraph_citations.pkl")
},
"books_conferences": {
"process_data": "_process_data_books_conferences",
"persistent_file": os.path.join(self.path,
"books_conferences.pkl")
},
"author_id_chapters": {
"process_data":
"_process_data_author_id_chapters",
"persistent_file":
os.path.join(self.path, "author_id_chapters.pkl")
},
"author_name_chapters": {
"process_data":
"_process_data_author_name_chapters",
"persistent_file":
os.path.join(self.path, "author_name_chapters.pkl")
},
"confproc_scigraph_citations_chapters": {
"process_data":
"_process_data_confproc_scigraph_citations_chapters",
"persistent_file":
os.path.join(self.path,
"confproc_scigraph_citations_chapters.pkl")
}
}
def __init__(self,
embedding_type,
dataset,
graph_type="directed",
threshold=2,
gpu=0):
os.environ["CUDA_DEVICE_ORDER"] = "PCI_BUS_ID"
os.environ["CUDA_VISIBLE_DEVICES"] = str(gpu)
self.embedding_type = embedding_type
self.dataset = dataset
self.graph_type = graph_type
self.threshold = threshold
self.embeddings_parser = EmbeddingsParser(gpu)
self.timer = Timer()
self.path_persistent = os.path.join(
os.path.dirname(os.path.realpath(__file__)), "..", "..", "..",
"data", "interim", "gat", self.embedding_type, self.dataset)
if not os.path.exists(self.path_persistent):
os.makedirs(self.path_persistent)
def train(self, data):
if not self._load_model_classifier():
print("Classifier not trained yet. Training now...")
timer = Timer()
timer.tic()
print("Loading the training embeddings...")
if not self._load_train_embeddings():
print("The pretrained embeddings are missing.")
else:
print("Loaded.")
training_ids = list(data.chapter)
training_embeddings = self.pretrained_embeddings[[
self.pretrained_embeddings_id_map[id] for id in training_ids
]]
self.label_encoder = LabelEncoder()
self.labels = self.label_encoder.fit_transform(
data.conferenceseries)
self.classifier.fit(training_embeddings, self.labels)
self._save_model_classifier()
print("Training finished.")
timer.toc()
class DatasetsParser:
path = os.path.join(os.path.dirname(os.path.realpath(__file__)), "..",
"..", "data", "interim", "parsed_data")
def __init__(self):
self.parser = FileParser()
self.persistent = {}
self.timer = Timer()
self.processes = {
"chapters_books": {
"process_data": "_process_data_chapters_books",
"persistent_file": os.path.join(self.path,
"chapters_books.pkl")
},
"chapters_all_scigraph_citations": {
"process_data":
"_process_data_chapters_all_scigraph_citations",
"persistent_file":
os.path.join(self.path, "chapters_all_scigraph_citations.pkl")
},
"chapters_confproc_scigraph_citations": {
"process_data":
"_process_data_chapters_confproc_scigraph_citations",
"persistent_file":
os.path.join(self.path,
"chapters_confproc_scigraph_citations.pkl")
},
"books_conferences": {
"process_data": "_process_data_books_conferences",
"persistent_file": os.path.join(self.path,
"books_conferences.pkl")
},
"author_id_chapters": {
"process_data":
"_process_data_author_id_chapters",
"persistent_file":
os.path.join(self.path, "author_id_chapters.pkl")
},
"author_name_chapters": {
"process_data":
"_process_data_author_name_chapters",
"persistent_file":
os.path.join(self.path, "author_name_chapters.pkl")
},
"confproc_scigraph_citations_chapters": {
"process_data":
"_process_data_confproc_scigraph_citations_chapters",
"persistent_file":
os.path.join(self.path,
"confproc_scigraph_citations_chapters.pkl")
}
}
def get_data(self, process):
# Check if the data is already present
if (process in self.persistent):
return self.persistent[process]
print("Process '{}' not in memory yet.".format(process))
# Load from persistent file if data already processed
if os.path.isfile(self.processes[process]["persistent_file"]):
with open(self.processes[process]["persistent_file"], "rb") as f:
self.persistent[process] = pickle.load(f)
return self.persistent[process]
print("Process '{}' not persistent yet. Processing.".format(process))
# Process the data
self.persistent[process] = self._parse_file(
self.processes[process]["process_data"])
with open(self.processes[process]["persistent_file"], "wb") as f:
pickle.dump(self.persistent[process], f)
return self.persistent[process]
def _parse_file(self, process_data):
print("Start processing file.\n")
self.timer.tic()
process_data_function = self.__getattribute__(process_data)
results = process_data_function()
self.timer.toc()
return results
# processes implementation
def _process_data_chapters_books(self):
# Load datasets
df_chapters_books_isbns = pd.DataFrame(
list(self.parser.get_data("chapters_books_isbns").items()),
columns=["chapter", "books_isbns"])
df_isbn_book_ids = pd.DataFrame(list(
self.parser.get_data("isbn_books").items()),
columns=["isbn", "book"])
# Process datasets
df_chapters_books_isbns[["isbn1", "isbn2"]] = pd.DataFrame(
df_chapters_books_isbns["books_isbns"].tolist(),
index=df_chapters_books_isbns.index)
df_chapters_books_isbns.drop(columns=["books_isbns"],
axis=1,
inplace=True)
df_chapters_isbn1 = pd.merge(
df_chapters_books_isbns[["chapter", "isbn1"]],
df_isbn_book_ids,
how="inner",
left_on=["isbn1"],
right_on=["isbn"])
df_chapters_isbn1.drop(columns=["isbn1", "isbn"], inplace=True)
df_chapters_isbn2 = pd.merge(
df_chapters_books_isbns[["chapter", "isbn2"]],
df_isbn_book_ids,
how="inner",
left_on=["isbn2"],
right_on=["isbn"])
df_chapters_isbn2.drop(columns=["isbn2", "isbn"], inplace=True)
df_chapters_books = df_chapters_isbn1.append(df_chapters_isbn2,
ignore_index=True)
df_chapters_books.drop_duplicates(inplace=True)
return df_chapters_books
def _process_data_chapters_all_scigraph_citations(self):
df_chapters_citations = pd.DataFrame(
list(self.parser.get_data("chapters_all_citations").items()),
columns=["chapter", "chapter_citations"])
chapters_count = len(df_chapters_citations)
with tqdm(desc="Processing citations",
total=chapters_count,
unit="chapter") as pbar:
for idx in range(chapters_count):
citations = df_chapters_citations.iloc[idx][
"chapter_citations"]
citations = [
c for c in citations
if c is not None and c.startswith("sg")
]
df_chapters_citations.iloc[
idx]["chapter_citations"] = citations if citations \
else np.nan
pbar.update(1)
return df_chapters_citations[
df_chapters_citations["chapter_citations"].notnull()]
def _process_data_chapters_confproc_scigraph_citations(self):
df_scigraph_citations = self.get_data(
"chapters_all_scigraph_citations")
df_chapters = pd.DataFrame(self.parser.get_data("chapters"),
columns=["chapter"])
chapters = set(list(df_chapters["chapter"]))
chapters_count = len(df_scigraph_citations)
with tqdm(desc="Processing citations",
total=chapters_count,
unit="chapter") as pbar:
for idx in range(chapters_count):
scigraph_citations = df_scigraph_citations.iloc[idx][
"chapter_citations"]
citations = [c for c in scigraph_citations if c in chapters]
df_scigraph_citations.iloc[idx][
"chapter_citations"] = citations if citations else np.nan
pbar.update(1)
return df_scigraph_citations[
df_scigraph_citations["chapter_citations"].notnull()]
def _process_data_books_conferences(self):
df_old_books_new_books = pd.DataFrame(list(
self.parser.get_data("old_books_new_books").items()),
columns=["old_book", "new_book"])
df_old_books_conferences = pd.DataFrame(
list(self.parser.get_data("old_books_conferences").items()),
columns=["old_book", "conference"])
df = pd.merge(df_old_books_new_books,
df_old_books_conferences,
how="left",
on=["old_book", "old_book"])
df.drop(columns=["old_book"], axis=1, inplace=True)
df.rename(columns={
"new_book": "book",
"conference": "conference"
},
inplace=True)
return df[df["conference"].notnull()]
def _process_data_author_id_chapters(self):
df_chapters_authors = pd.DataFrame(list(
self.parser.get_data("chapters_authors").items()),
columns=["chapter", "authors"])
contributions = []
for idx in range(len(df_chapters_authors)):
authors = [
author for author in df_chapters_authors.iloc[idx]["authors"]
]
chapter = df_chapters_authors.iloc[idx]["chapter"]
contributions.extend([(author, chapter) for author in authors])
author_id_chapters = pd.DataFrame.from_records(
contributions, columns=["author", "chapter"])
return author_id_chapters
def _process_data_author_name_chapters(self):
df_chapters_authors_name = pd.DataFrame(
list(self.parser.get_data("chapters_authors_name").items()),
columns=["chapter", "authors_name"])
contributions = []
for idx in range(len(df_chapters_authors_name)):
authors_name = [
author_name for author_name in
df_chapters_authors_name.iloc[idx]["authors_name"]
]
chapter = df_chapters_authors_name.iloc[idx]["chapter"]
contributions.extend([(author_name, chapter)
for author_name in authors_name])
author_name_chapters = pd.DataFrame.from_records(
contributions, columns=["author_name", "chapter"])
return author_name_chapters
def _process_data_confproc_scigraph_citations_chapters(self):
df_chapters_confproc_scigraph_citations = self.get_data(
"chapters_confproc_scigraph_citations")
citations = []
for idx in range(len(df_chapters_confproc_scigraph_citations)):
citation_list = [
citation
for citation in df_chapters_confproc_scigraph_citations.
iloc[idx]["chapter_citations"]
]
chapter = df_chapters_confproc_scigraph_citations.iloc[idx][
"chapter"]
citations.extend([(citation, chapter)
for citation in citation_list])
confproc_scigraph_citations_chapter = pd.DataFrame.from_records(
citations, columns=["citation", "chapter"])
return confproc_scigraph_citations_chapter
def inference(self, test_data, gpu_mem_fraction=None):
print("Inference.")
timer = Timer()
timer.tic()
G = test_data[0]
features = test_data[1]
id_map = test_data[2]
class_map = test_data[4]
if isinstance(list(class_map.values())[0], list):
num_classes = len(list(class_map.values())[0])
else:
num_classes = len(set(class_map.values()))
if not features is None:
# pad with dummy zero vector
features = np.vstack([features, np.zeros((features.shape[1], ))])
placeholders = self._construct_placeholders(num_classes)
minibatch = NodeMinibatchIterator(G,
id_map,
placeholders,
class_map,
num_classes,
batch_size=self.batch_size,
max_degree=self.max_degree)
adj_info_ph = tf.compat.v1.placeholder(tf.int32,
shape=minibatch.adj.shape)
adj_info = tf.Variable(adj_info_ph, trainable=False, name="adj_info")
model = self._create_model(num_classes, placeholders, features,
adj_info, minibatch)
config = tf.compat.v1.ConfigProto(
log_device_placement=self.log_device_placement)
config.gpu_options.allow_growth = True
config.allow_soft_placement = True
# Initialize session
sess = tf.compat.v1.Session(config=config)
merged = tf.compat.v1.summary.merge_all()
# summary_writer = tf.summary.FileWriter(self._log_dir(), sess.graph)
# Initialize model saver
saver = tf.compat.v1.train.Saver(max_to_keep=self.epochs)
# Init variables
sess.run(tf.compat.v1.global_variables_initializer(),
feed_dict={adj_info_ph: minibatch.adj})
# Restore model
print("Restoring trained model.")
checkpoint_file = os.path.join(self._log_dir(), "model.ckpt")
ckpt = tf.compat.v1.train.get_checkpoint_state(checkpoint_file)
if checkpoint_file:
saver.restore(sess, checkpoint_file)
print("Model restored.")
else:
print("This model checkpoint does not exist. The model might " +
"not be trained yet or the checkpoint is invalid.")
val_adj_info = tf.compat.v1.assign(adj_info, minibatch.test_adj)
sess.run(val_adj_info.op)
print("Computing predictions...")
t_test = time.time()
finished = False
val_losses = []
val_preds = []
nodes = []
iter_num = 0
while not finished:
feed_dict_val, _, finished, nodes_subset = minibatch.incremental_node_val_feed_dict(
self.batch_size, iter_num, test=True)
node_outs_val = sess.run([model.preds, model.loss],
feed_dict=feed_dict_val)
val_preds.append(node_outs_val[0])
val_losses.append(node_outs_val[1])
nodes.extend(nodes_subset)
iter_num += 1
val_preds = np.vstack(val_preds)
print("Computed.")
# Return only the embeddings of the test nodes
test_preds_ids = {}
for i, node in enumerate(nodes):
test_preds_ids[node] = i
test_nodes = [n for n in G.nodes() if G.node[n]['test']]
test_preds = val_preds[[test_preds_ids[id] for id in test_nodes]]
timer.toc()
sess.close()
return test_nodes, test_preds
def train(self, train_data, test_data=None):
print("Training model...")
timer = Timer()
timer.tic()
G = train_data[0]
features = train_data[1]
id_map = train_data[2]
class_map = train_data[4]
if isinstance(list(class_map.values())[0], list):
num_classes = len(list(class_map.values())[0])
else:
num_classes = len(set(class_map.values()))
if not features is None:
# pad with dummy zero vector
features = np.vstack([features, np.zeros((features.shape[1], ))])
placeholders = self._construct_placeholders(num_classes)
minibatch = NodeMinibatchIterator(G,
id_map,
placeholders,
class_map,
num_classes,
batch_size=self.batch_size,
max_degree=self.max_degree)
adj_info_ph = tf.compat.v1.placeholder(tf.int32,
shape=minibatch.adj.shape)
adj_info = tf.Variable(adj_info_ph, trainable=False, name="adj_info")
model = self._create_model(num_classes, placeholders, features,
adj_info, minibatch)
config = tf.compat.v1.ConfigProto(
log_device_placement=self.log_device_placement)
config.gpu_options.allow_growth = True
config.allow_soft_placement = True
# Initialize session
sess = tf.compat.v1.Session(config=config)
merged = tf.compat.v1.summary.merge_all()
# summary_writer = tf.summary.FileWriter(self._log_dir(), sess.graph)
# Initialize model saver
saver = tf.compat.v1.train.Saver(max_to_keep=self.epochs)
# Init variables
sess.run(tf.compat.v1.global_variables_initializer(),
feed_dict={adj_info_ph: minibatch.adj})
# Train model
total_steps = 0
avg_time = 0.0
epoch_val_costs = []
train_losses = []
validation_losses = []
train_adj_info = tf.compat.v1.assign(adj_info, minibatch.adj)
val_adj_info = tf.compat.v1.assign(adj_info, minibatch.test_adj)
for epoch in range(self.epochs):
minibatch.shuffle()
iter = 0
print('Epoch: %04d' % (epoch))
epoch_val_costs.append(0)
train_loss_epoch = []
validation_loss_epoch = []
while not minibatch.end():
# Construct feed dictionary
feed_dict, labels = minibatch.next_minibatch_feed_dict()
feed_dict.update({placeholders['dropout']: self.dropout})
t = time.time()
# Training step
outs = sess.run(
[merged, model.opt_op, model.loss, model.preds],
feed_dict=feed_dict)
train_cost = outs[2]
train_loss_epoch.append(train_cost)
if iter % self.validate_iter == 0:
# Validation
sess.run(val_adj_info.op)
if self.validate_batch_size == -1:
val_cost, val_f1_mic, val_f1_mac, duration = self._incremental_evaluate(
sess, model, minibatch, self.batch_size)
else:
val_cost, val_f1_mic, val_f1_mac, duration = self._evaluate(
sess, model, minibatch, self.validate_batch_size)
sess.run(train_adj_info.op)
epoch_val_costs[-1] += val_cost
validation_loss_epoch.append(val_cost)
# if total_steps % self.print_every == 0:
# summary_writer.add_summary(outs[0], total_steps)
# Print results
avg_time = (avg_time * total_steps + time.time() -
t) / (total_steps + 1)
if total_steps % self.print_every == 0:
train_f1_mic, train_f1_mac = self._calc_f1(
labels, outs[-1])
print("Iter:", '%04d' % iter, "train_loss=",
"{:.5f}".format(train_cost), "train_f1_mic=",
"{:.5f}".format(train_f1_mic), "train_f1_mac=",
"{:.5f}".format(train_f1_mac), "val_loss=",
"{:.5f}".format(val_cost), "val_f1_mic=",
"{:.5f}".format(val_f1_mic), "val_f1_mac=",
"{:.5f}".format(val_f1_mac), "time=",
"{:.5f}".format(avg_time))
iter += 1
total_steps += 1
if total_steps > self.max_total_steps:
break
# Keep track of train and validation losses per epoch
train_losses.append(sum(train_loss_epoch) / len(train_loss_epoch))
validation_losses.append(
sum(validation_loss_epoch) / len(validation_loss_epoch))
# If the epoch has the lowest validation loss so far
if validation_losses[-1] == min(validation_losses):
print(
"Minimum validation loss so far ({}) at epoch {}.".format(
validation_losses[-1], epoch))
# Save model at each epoch
print("Saving model at epoch {}.".format(epoch))
saver.save(sess, os.path.join(self._log_dir(), "model.ckpt"))
if total_steps > self.max_total_steps:
break
print("Optimization Finished!")
training_time = timer.toc()
self._plot_losses(train_losses, validation_losses)
self._print_stats(train_losses, validation_losses, training_time)
sess.run(val_adj_info.op)
val_cost, val_f1_mic, val_f1_mac, duration = self._incremental_evaluate(
sess, model, minibatch, self.batch_size)
print("Full validation stats:", "loss=", "{:.5f}".format(val_cost),
"f1_micro=", "{:.5f}".format(val_f1_mic), "f1_macro=",
"{:.5f}".format(val_f1_mac), "time=", "{:.5f}".format(duration))
with open(self._log_dir() + "val_stats.txt", "w") as fp:
fp.write("loss={:.5f} f1_micro={:.5f} f1_macro={:.5f} time={:.5f}".
format(val_cost, val_f1_mic, val_f1_mac, duration))
def __init__(self):
self.timer = Timer()
self.persistent = {}
self.processes = {
# Old datasets
"old_books": {
"filename": os.path.join(self.path_raw,
old_books_file),
"process_line": "_process_line_old_books",
"persistent_file": os.path.join(self.path_persistent,
"old_books.pkl"),
"persistent_variable": [],
"dataset_format": "ntriples"
},
"old_books_new_books": {
"filename": os.path.join(self.path_raw,
old_books_file),
"process_line": "_process_line_old_books_new_books",
"persistent_file": os.path.join(
self.path_persistent,
"old_books_new_books.pkl"),
"persistent_variable": {},
"dataset_format": "ntriples"
},
"old_books_conferences": {
"filename": os.path.join(self.path_raw,
old_books_file),
"process_line": "_process_line_old_books_conferences",
"persistent_file": os.path.join(
self.path_persistent,
"old_books_conferences.pkl"),
"persistent_variable": {},
"dataset_format": "ntriples"
},
"conferences": {
"filename": os.path.join(self.path_raw,
old_conferences_file),
"process_line": "_process_line_conferences",
"persistent_file": os.path.join(self.path_persistent,
"conferences.pkl"),
"persistent_variable": [],
"dataset_format": "ntriples"
},
"conferences_name": {
"filename": os.path.join(self.path_raw,
old_conferences_file),
"process_line": "_process_line_conferences_name",
"persistent_file": os.path.join(
self.path_persistent, "conferences_name.pkl"),
"persistent_variable": {},
"dataset_format": "ntriples"
},
"conferences_acronym": {
"filename": os.path.join(self.path_raw,
old_conferences_file),
"process_line": "_process_line_conferences_acronym",
"persistent_file": os.path.join(
self.path_persistent,
"conferences_acronym.pkl"),
"persistent_variable": {},
"dataset_format": "ntriples"
},
"conferences_city": {
"filename": os.path.join(self.path_raw,
old_conferences_file),
"process_line": "_process_line_conferences_city",
"persistent_file": os.path.join(
self.path_persistent,
"conferences_city.pkl"),
"persistent_variable": {},
"dataset_format": "ntriples"
},
"conferences_country": {
"filename": os.path.join(self.path_raw,
old_conferences_file),
"process_line": "_process_line_conferences_country",
"persistent_file": os.path.join(
self.path_persistent,
"conferences_country.pkl"),
"persistent_variable": {},
"dataset_format": "ntriples"
},
"conferences_year": {
"filename": os.path.join(self.path_raw,
old_conferences_file),
"process_line": "_process_line_conferences_year",
"persistent_file": os.path.join(
self.path_persistent,
"conferences_year.pkl"),
"persistent_variable": {},
"dataset_format": "ntriples"
},
"conferences_datestart": {
"filename": os.path.join(self.path_raw,
old_conferences_file),
"process_line": "_process_line_conferences_datestart",
"persistent_file": os.path.join(
self.path_persistent,
"conferences_datestart.pkl"),
"persistent_variable": {},
"dataset_format": "ntriples"
},
"conferences_dateend": {
"filename": os.path.join(self.path_raw,
old_conferences_file),
"process_line": "_process_line_conferences_dateend",
"persistent_file": os.path.join(
self.path_persistent,
"conferences_dateend.pkl"),
"persistent_variable": {},
"dataset_format": "ntriples"
},
"conferences_conferenceseries": {
"filename": os.path.join(self.path_raw,
old_conferences_file),
"process_line": "_process_line_conferences_conferenceseries",
"persistent_file": os.path.join(
self.path_persistent,
"conferences_conferenceseries.pkl"),
"persistent_variable": {},
"dataset_format": "ntriples"
},
"conferenceseries": {
"filename": os.path.join(self.path_raw,
old_conferences_file),
"process_line": "_process_line_conferenceseries",
"persistent_file": os.path.join(
self.path_persistent, "conferenceseries.pkl"),
"persistent_variable": [],
"dataset_format": "ntriples"
},
"conferenceseries_name": {
"filename": os.path.join(self.path_raw,
old_conferences_file),
"process_line": "_process_line_conferenceseries_name",
"persistent_file": os.path.join(
self.path_persistent,
"conferenceseries_name.pkl"),
"persistent_variable": {},
"dataset_format": "ntriples"
},
# New datasets
"books": {
"filename": os.path.join(self.path_raw, books_file),
"process_line": "_process_line_books",
"persistent_file": os.path.join(self.path_persistent,
"books.pkl"),
"persistent_variable": [],
"dataset_format": "json"
},
"isbn_books": {
"filename": os.path.join(self.path_raw, books_file),
"process_line": "_process_line_isbn_books",
"persistent_file": os.path.join(self.path_persistent,
"isbn_books.pkl"),
"persistent_variable": {},
"dataset_format": "json"
},
"authors_name": {
"filename": os.path.join(self.path_raw, authors_file),
"process_line": "_process_line_authors_name",
"persistent_file": os.path.join(self.path_persistent,
"authors_name.pkl"),
"persistent_variable": {},
"dataset_format": "json"
},
"chapters": {
"filename": os.path.join(self.path_raw, chapters_file),
"process_line": "_process_line_chapters",
"persistent_file": os.path.join(self.path_persistent,
"chapters.pkl"),
"persistent_variable": [],
"dataset_format": "json"
},
"chapters_title": {
"filename": os.path.join(self.path_raw, chapters_file),
"process_line": "_process_line_chapters_title",
"persistent_file": os.path.join(self.path_persistent,
"chapters_title.pkl"),
"persistent_variable": {},
"dataset_format": "json"
},
"chapters_year": {
"filename": os.path.join(self.path_raw, chapters_file),
"process_line": "_process_line_chapters_year",
"persistent_file": os.path.join(self.path_persistent,
"chapters_year.pkl"),
"persistent_variable": {},
"dataset_format": "json"
},
"chapters_language": {
"filename": os.path.join(self.path_raw, chapters_file),
"process_line": "_process_line_chapters_language",
"persistent_file": os.path.join(
self.path_persistent, "chapters_language.pkl"),
"persistent_variable": {},
"dataset_format": "json"
},
"chapters_abstract": {
"filename": os.path.join(self.path_raw, chapters_file),
"process_line": "_process_line_chapters_abstract",
"persistent_file": os.path.join(
self.path_persistent, "chapters_abstract.pkl"),
"persistent_variable": {},
"dataset_format": "json"
},
"chapters_authors": {
"filename": os.path.join(self.path_raw, chapters_file),
"process_line": "_process_line_chapters_authors",
"persistent_file": os.path.join(
self.path_persistent, "chapters_authors.pkl"),
"persistent_variable": {},
"dataset_format": "json"
},
"chapters_authors_name": {
"filename": os.path.join(self.path_raw, chapters_file),
"process_line": "_process_line_chapters_authors_name",
"persistent_file": os.path.join(
self.path_persistent,
"chapters_authors_name.pkl"),
"persistent_variable": {},
"dataset_format": "json"
},
"chapters_all_citations": {
"filename": os.path.join(self.path_raw, chapters_file),
"process_line": "_process_line_chapters_all_citations",
"persistent_file": os.path.join(
self.path_persistent,
"chapters_all_citations.pkl"),
"persistent_variable": {},
"dataset_format": "json"
},
"chapters_keywords": {
"filename": os.path.join(self.path_raw, chapters_file),
"process_line": "_process_line_chapters_keywords",
"persistent_file": os.path.join(
self.path_persistent, "chapters_keywords.pkl"),
"persistent_variable": {},
"dataset_format": "json"
},
"chapters_books_isbns": {
"filename": os.path.join(self.path_raw, chapters_file),
"process_line": "_process_line_chapters_books_isbns",
"persistent_file": os.path.join(
self.path_persistent,
"chapters_books_isbns.pkl"),
"persistent_variable": {},
"dataset_format": "json"
},
}
def train(self, train_data):
print("Training model...")
timer = Timer()
timer.tic()
G = train_data[0]
features = train_data[1]
id_map = train_data[2]
if features is not None:
# pad with dummy zero vector
features = np.vstack([features, np.zeros((features.shape[1], ))])
context_pairs = train_data[3] if self.random_context else None
placeholders = self._construct_placeholders()
minibatch = EdgeMinibatchIterator(G,
id_map,
placeholders,
batch_size=self.batch_size,
max_degree=self.max_degree,
num_neg_samples=self.neg_sample_size,
context_pairs=context_pairs)
adj_info_ph = tf.compat.v1.placeholder(tf.int32,
shape=minibatch.adj.shape)
adj_info = tf.Variable(adj_info_ph, trainable=False, name="adj_info")
model = self._create_model(placeholders, features, adj_info, minibatch)
config = tf.compat.v1.ConfigProto(
log_device_placement=self.log_device_placement)
config.gpu_options.allow_growth = True
config.allow_soft_placement = True
# Initialize session
sess = tf.compat.v1.Session(config=config)
merged = tf.compat.v1.summary.merge_all()
# summary_writer = tf.compat.v1.summary.FileWriter(self._log_dir(),
# sess.graph)
# Initialize model saver
saver = tf.compat.v1.train.Saver(max_to_keep=self.epochs)
# Init variables
sess.run(tf.compat.v1.global_variables_initializer(),
feed_dict={adj_info_ph: minibatch.adj})
# Train model
train_shadow_mrr = None
shadow_mrr = None
total_steps = 0
avg_time = 0.0
epoch_val_costs = []
train_losses = []
validation_losses = []
train_adj_info = tf.compat.v1.assign(adj_info, minibatch.adj)
val_adj_info = tf.compat.v1.assign(adj_info, minibatch.test_adj)
for epoch in range(self.epochs):
minibatch.shuffle()
iter = 0
print('Epoch: %04d' % (epoch))
epoch_val_costs.append(0)
train_loss_epoch = []
validation_loss_epoch = []
while not minibatch.end():
# Construct feed dictionary
feed_dict = minibatch.next_minibatch_feed_dict()
feed_dict.update({placeholders['dropout']: self.dropout})
t = time.time()
# Training step
outs = sess.run([
merged, model.opt_op, model.loss, model.ranks,
model.aff_all, model.mrr, model.outputs1
],
feed_dict=feed_dict)
train_cost = outs[2]
train_mrr = outs[5]
train_loss_epoch.append(train_cost)
if train_shadow_mrr is None:
train_shadow_mrr = train_mrr
else:
train_shadow_mrr -= (1 - 0.99) * (train_shadow_mrr -
train_mrr)
if iter % self.validate_iter == 0:
# Validation
sess.run(val_adj_info.op)
val_cost, ranks, val_mrr, duration = self._evaluate(
sess, model, minibatch, size=self.validate_batch_size)
sess.run(train_adj_info.op)
epoch_val_costs[-1] += val_cost
validation_loss_epoch.append(val_cost)
if shadow_mrr is None:
shadow_mrr = val_mrr
else:
shadow_mrr -= (1 - 0.99) * (shadow_mrr - val_mrr)
# if total_steps % self.print_every == 0:
# summary_writer.add_summary(outs[0], total_steps)
# Print results
avg_time = (avg_time * total_steps + time.time() -
t) / (total_steps + 1)
if total_steps % self.print_every == 0:
print(
"Iter: %04d" % iter,
"train_loss={:.5f}".format(train_cost),
"train_mrr={:.5f}".format(train_mrr),
# exponential moving average
"train_mrr_ema={:.5f}".format(train_shadow_mrr),
"val_loss={:.5f}".format(val_cost),
"val_mrr={:.5f}".format(val_mrr),
# exponential moving average
"val_mrr_ema={:.5f}".format(shadow_mrr),
"time={:.5f}".format(avg_time))
iter += 1
total_steps += 1
if total_steps > self.max_total_steps:
break
# Keep track of train and validation losses per epoch
train_losses.append(sum(train_loss_epoch) / len(train_loss_epoch))
validation_losses.append(
sum(validation_loss_epoch) / len(validation_loss_epoch))
# Save embeddings if the epoch has the lowest validation loss
# so far
if self.save_embeddings and validation_losses[-1] == min(
validation_losses):
print(
"Minimum validation loss so far ({}) at epoch {}.".format(
validation_losses[-1], epoch))
sess.run(val_adj_info.op)
self._save_embeddings(sess, model,
minibatch, self.validate_batch_size,
self._log_dir())
# Save model at each epoch
print("Saving model at epoch {}.".format(epoch))
saver.save(sess,
os.path.join(self._log_dir(),
"model_epoch_" + str(epoch) + ".ckpt"),
global_step=total_steps)
if total_steps > self.max_total_steps:
break
print("Optimization finished!\n")
training_time = timer.toc()
self._plot_losses(train_losses, validation_losses)
self._print_stats(train_losses, validation_losses, training_time)
def train(self):
# Make the datasets iterable
batch_size = 10000
train_data_loader = torch.utils.data.DataLoader(
dataset=self.training_data, batch_size=batch_size)
validation_data_loader = torch.utils.data.DataLoader(
dataset=self.validation_data, batch_size=batch_size)
train_labels_loader = torch.utils.data.DataLoader(
dataset=self.training_labels, batch_size=batch_size)
validation_labels_loader = torch.utils.data.DataLoader(
dataset=self.validation_labels, batch_size=batch_size)
# Train the model
timer = Timer()
timer.tic()
mean_train_losses = []
mean_validation_losses = []
for epoch in range(self.epochs):
print("Epoch: {}".format(epoch + 1))
train_losses = []
validation_losses = []
self.model.train()
for i, (train_data, train_labels) in enumerate(
zip(train_data_loader, train_labels_loader)):
self.model.train()
self.optimizer.zero_grad()
outputs = self.model(train_data)
loss = self.cross_entropy_loss(outputs.squeeze(), train_labels)
loss.backward()
self.optimizer.step()
train_losses.append(loss.item())
# Compute validation loss
self.model.eval()
with torch.no_grad():
for _, (val_data, val_labels) in enumerate(
zip(validation_data_loader,
validation_labels_loader)):
val_pred = self.model(val_data)
val_loss = self.cross_entropy_loss(
val_pred.squeeze(), val_labels)
validation_losses.append(val_loss.item())
print("\tTrain loss: {}, validation loss: {}".format(
np.mean(train_losses), np.mean(validation_losses)))
mean_train_losses.append(np.mean(train_losses))
mean_validation_losses.append(np.mean(validation_losses))
if mean_validation_losses[-1] == min(mean_validation_losses):
print("\tSaving model...")
torch.save(self.model.state_dict(), self.model_path)
print("\tSaved.")
print("Finished training.")
training_time = timer.toc()
self._plot_losses(mean_train_losses, mean_validation_losses)
self._print_stats(mean_train_losses, mean_validation_losses,
training_time)
def main():
parser = argparse.ArgumentParser(
description='Arguments for GraphSAGE concatenated ' +
'classifier model evaluation.')
parser.add_argument(
"classifier_name",
choices=["KNN", "MLP", "MultinomialLogisticRegression"],
help="The name of the classifier.")
parser.add_argument('embedding_type',
choices=[
"AVG_L", "AVG_2L", "AVG_SUM_L4", "AVG_SUM_ALL",
"MAX_2L", "CONC_AVG_MAX_2L",
"CONC_AVG_MAX_SUM_L4", "SUM_L", "SUM_2L"
],
help="Type of embedding.")
parser.add_argument('model_checkpoint_citations',
help='Name of the GraphSAGE model checkpoint ' +
'for the citations graph.')
parser.add_argument('model_checkpoint_authors',
help='Name of the GraphSAGE model checkpoint ' +
'for the authors graph.')
parser.add_argument('train_prefix_citations',
help='Name of the object file that stores the ' +
'citations training data.')
parser.add_argument('train_prefix_authors',
help='Name of the object file that stores the ' +
'authors training data.')
parser.add_argument('model_name',
choices=[
"graphsage_mean", "gcn", "graphsage_seq",
"graphsage_maxpool", "graphsage_meanpool"
],
help="Model names.")
parser.add_argument('--model_size',
choices=["small", "big"],
default="small",
help="Can be big or small; model specific def'ns")
parser.add_argument('--learning_rate',
type=float,
default=0.00001,
help='Initial learning rate.')
parser.add_argument('--epochs',
type=int,
default=10,
help='Number of epochs to train.')
parser.add_argument('--dropout',
type=float,
default=0.0,
help='Dropout rate (1 - keep probability).')
parser.add_argument('--weight_decay',
type=float,
default=0.0,
help='Weight for l2 loss on embedding matrix.')
parser.add_argument('--max_degree',
type=int,
default=100,
help='Maximum node degree.')
parser.add_argument('--samples_1',
type=int,
default=25,
help='Number of samples in layer 1.')
parser.add_argument('--samples_2',
type=int,
default=10,
help='Number of users samples in layer 2.')
parser.add_argument('--dim_1',
type=int,
default=128,
help='Size of output dim ' +
'(final is 2x this, if using concat)')
parser.add_argument('--dim_2',
type=int,
default=128,
help='Size of output dim ' +
'(final is 2x this, if using concat)')
parser.add_argument('--random_context',
action="store_false",
default=True,
help='Whether to use random context or direct ' +
'edges.')
parser.add_argument('--neg_sample_size',
type=int,
default=20,
help='Number of negative samples.')
parser.add_argument('--batch_size',
type=int,
default=512,
help='Minibatch size.')
parser.add_argument('--identity_dim',
type=int,
default=0,
help='Set to positive value to use identity ' +
'embedding features of that dimension.')
parser.add_argument('--save_embeddings',
action="store_true",
default=False,
help='Whether to save embeddings for all nodes ' +
'after training')
parser.add_argument('--base_log_dir',
default='../../../data/processed/graphsage/',
help='Base directory for logging and saving ' +
'embeddings')
parser.add_argument('--validate_iter',
type=int,
default=5000,
help='How often to run a validation minibatch.')
parser.add_argument('--validate_batch_size',
type=int,
default=256,
help='How many nodes per validation sample.')
parser.add_argument('--gpu',
type=int,
default=0,
help='Which gpu to use.')
parser.add_argument('--print_every',
type=int,
default=50,
help='How often to print training info.')
parser.add_argument('--max_total_steps',
type=int,
default=10**10,
help='Maximum total number of iterations.')
parser.add_argument('--log_device_placement',
action="store_true",
default=False,
help='Whether to log device placement.')
parser.add_argument('--recs',
type=int,
default=10,
help='Number of recommendations.')
args = parser.parse_args()
print("Starting evaluation...")
os.environ["CUDA_DEVICE_ORDER"] = "PCI_BUS_ID"
os.environ["CUDA_VISIBLE_DEVICES"] = str(args.gpu)
print("Using GPU {}.".format(str(args.gpu)))
from GraphSAGEClassifierConcatEvaluation import GraphSAGEClassifierConcatEvaluation
evaluation_model = GraphSAGEClassifierConcatEvaluation(
args.classifier_name, args.embedding_type, args.model_name,
args.model_size, args.learning_rate, args.gpu, args.recs)
# Initialize GraphSAGE models
graphsage_model_citations = UnsupervisedModel(
args.train_prefix_citations, args.model_name, args.model_size,
args.learning_rate, args.epochs, args.dropout, args.weight_decay,
args.max_degree, args.samples_1, args.samples_2, args.dim_1,
args.dim_2, args.random_context, args.neg_sample_size,
args.batch_size, args.identity_dim, args.save_embeddings,
args.base_log_dir, args.validate_iter, args.validate_batch_size,
args.gpu, args.print_every, args.max_total_steps,
args.log_device_placement)
graphsage_model_authors = UnsupervisedModel(
args.train_prefix_authors, args.model_name, args.model_size,
args.learning_rate, args.epochs, args.dropout, args.weight_decay,
args.max_degree, args.samples_1, args.samples_2, args.dim_1,
args.dim_2, args.random_context, args.neg_sample_size,
args.batch_size, args.identity_dim, args.save_embeddings,
args.base_log_dir, args.validate_iter, args.validate_batch_size,
args.gpu, args.print_every, args.max_total_steps,
args.log_device_placement)
# Train model if needed:
if not evaluation_model._has_persistent_model():
print("Classifier not trained yet. Training now...")
timer = Timer()
timer.tic()
evaluation_model.train(graphsage_model_citations,
graphsage_model_authors)
print("Training finished.")
timer.toc()
else:
evaluation_model._load_model_classifier()
# Load test data
print("Loading test data...")
query_test, query_test_authors, truth = evaluation_model.load_data()
print("Loaded.")
# Infer embeddings
print("Inferring embeddings for citations graph.")
queue_citations = mp.Queue()
process_citations = mp.Process(
target=evaluation_model.infer_embeddings,
args=(query_test, None, "citations", graphsage_model_citations,
args.model_checkpoint_citations, queue_citations))
process_citations.start()
embeddings_citations = queue_citations.get()
process_citations.join()
process_citations.terminate()
print("Inferring embeddings for authors graphs.")
queue_authors = mp.Queue()
process_authors = mp.Process(target=evaluation_model.infer_embeddings,
args=(query_test, query_test_authors,
"authors", graphsage_model_authors,
args.model_checkpoint_authors,
queue_authors))
process_authors.start()
embeddings_authors = queue_authors.get()
process_authors.join()
process_authors.terminate()
# Concatenate embeddings
test_embeddings = np.concatenate(
(embeddings_citations, embeddings_authors), axis=1)
print("Computing predictions...")
recommendation = evaluation_model.compute_predictions(test_embeddings)
print("Predictions computed.")
# Evaluate
print("Evaluating...")
evaluation = EvaluationContainer()
evaluation.evaluate(recommendation, truth)
print("Finished.")
class Processor():
def __init__(self, embedding_type, graph_type, threshold=2, gpu=0):
os.environ["CUDA_DEVICE_ORDER"] = "PCI_BUS_ID"
os.environ["CUDA_VISIBLE_DEVICES"] = str(gpu)
self.embedding_type = embedding_type
self.graph_type = graph_type
self.threshold = threshold
self.embeddings_parser = EmbeddingsParser(gpu)
self.timer = Timer()
self.path_persistent = os.path.join(
os.path.dirname(os.path.realpath(__file__)), "..", "..", "..",
"data", "interim", "graphsage", self.embedding_type,
self.graph_type)
if not os.path.isdir(self.path_persistent):
os.mkdir(self.path_persistent)
def training_data(self, num_walks=50):
self.prefix = "train_val"
self.timer.tic()
print("Creating training files.")
# Load training and validation data
d_train = DataLoader()
df_train = d_train.training_data_with_abstracts_citations().data
d_val = DataLoader()
df_validation = d_val.validation_data_with_abstracts_citations().data
# Create and save graph
self.G = nx.Graph()
# Add nodes and edges
print("Adding training nodes.")
self._add_nodes(df_train, test=False, val=False)
print("Adding training edges.")
if self.graph_type == "citations" or self.graph_type == "authors":
if self.graph_type == "authors":
df_train = d_train.author_names().data
self._add_edges(df_train)
elif self.graph_type == "citations_authors_het_edges":
# Adding heterogeneous edges
# Add citation edges
self._add_weighted_edges_citations(df_train)
# Add author edges
df_train = d_train.author_names().data
self._add_weighted_edges_authors(df_train)
else:
raise KeyError("Graph type unknown.")
print("Adding validation nodes.")
self._add_nodes(df_validation, test=False, val=True)
print("Adding validation edges.")
if self.graph_type == "citations" or self.graph_type == "authors":
if self.graph_type == "authors":
df_validation = d_val.author_names().data
self._add_edges(df_validation)
elif self.graph_type == "citations_authors_het_edges":
# Add citation edges
self._add_weighted_edges_citations(df_validation)
# Add author edges
df_validation = d_val.author_names().data
self._add_weighted_edges_authors(df_validation)
else:
raise KeyError("Graph type unknown.")
if self.graph_type == "citations_authors_het_edges":
# Remove edges with weight lower than threshold
remove_edges = [(u, v) for u, v, e in self.G.edges(data=True)
if e["weight"] < self.threshold]
self.G.remove_edges_from(remove_edges)
# Clear edge attributes
for n1, n2, d in self.G.edges(data=True):
d.clear()
print("Edges in graph: {}.\n".format(self.G.number_of_edges()))
print("Removing nodes without features.")
for node in list(self.G.nodes()):
if "feature" not in self.G.nodes[node].keys():
self.G.remove_node(node)
print("Nodes in graph: {}, edges in graph: {}.\n".format(
self.G.number_of_nodes(), self.G.number_of_edges()))
print("Saving graph to disk.")
G_data = json_graph.node_link_data(self.G)
with open(os.path.join(self.path_persistent, self.prefix + "-G.json"),
"w") as f:
f.write(json.dumps(G_data))
# Create and save class map
self.label_encoder = OneHotEncoder(handle_unknown='ignore',
sparse=False,
dtype=np.int)
data = df_train.append(df_validation, ignore_index=True)
labels = data.conferenceseries.unique()
labels = labels.reshape(-1, 1)
self.label_encoder.fit(labels)
self._create_class_map(data)
# Create and save id map
self._create_id_map()
# Create and save features
self._create_features()
# Perform and save random walks
nodes = [
n for n in list(self.G.nodes())
if not self.G.node[n]["val"] and not self.G.node[n]["test"]
]
subgraph = self.G.subgraph(nodes)
self._run_random_walks(subgraph, nodes, num_walks)
print("Finished creating training files.")
self.timer.toc()
# print some statistics
self._get_stats()
# Plot degree histogram
self._degree_histogram()
def test_data(self,
df_test,
G_train,
authors_df=None,
class_map=None,
normalize=True):
# TO DO: Add case for authors
self.prefix = "test"
print("Preprocessing data...")
self.G = G_train
print("Training graph has {} nodes and {} edges.\n".format(
self.G.number_of_nodes(), self.G.number_of_edges()))
# Add nodes and edges
print("Adding test nodes.")
self._add_nodes(df_test, test=True, val=False)
print("Adding test edges.")
if self.graph_type == "citations" or self.graph_type == "authors":
if self.graph_type == "authors":
if authors_df is not None:
df_test = pd.merge(df_test,
authors_df,
how="left",
on=["chapter", "chapter"])
else:
raise ValueError("Chapter authors are missing.")
self._add_edges(df_test)
elif self.graph_type == "citations_authors_het_edges":
# Adding heterogeneous edges
# Add citation edges
self._add_weighted_edges_citations(df_test)
# Add author edges
if authors_df is not None:
df_test = pd.merge(df_test,
authors_df,
how="left",
on=["chapter", "chapter"])
else:
raise ValueError("Chapter authors are missing.")
self._add_weighted_edges_authors(df_test)
# Remove edges with weight lower than threshold
remove_edges = [
(u, v) for u, v, e in self.G.edges(data=True)
if "weight" in e.keys() and e["weight"] < self.threshold
]
self.G.remove_edges_from(remove_edges)
# Clear edge attributes
for n1, n2, d in self.G.edges(data=True):
d.clear()
print("Edges in graph: {}.\n".format(self.G.number_of_edges()))
else:
raise KeyError("Graph type unknown.")
print("Removing nodes without features.")
for node in list(self.G.nodes()):
if "feature" not in self.G.nodes[node].keys():
self.G.remove_node(node)
print("Nodes in graph: {}, edges in graph: {}.\n".format(
self.G.number_of_nodes(), self.G.number_of_edges()))
# Remove all nodes that do not have val/test annotations
broken_count = 0
for node in self.G.nodes():
if 'val' not in self.G.node[node] or 'test' not in self.G.node[
node]:
self.G.remove_node(node)
broken_count += 1
print(
"Removed {} nodes that lacked proper annotations due to networkx versioning issues."
.format(broken_count))
# Make sure the graph has edge train_removed annotations
for edge in self.G.edges():
if (self.G.node[edge[0]]['val'] or self.G.node[edge[1]]['val']
or self.G.node[edge[0]]['test']
or self.G.node[edge[1]]['test']):
self.G[edge[0]][edge[1]]['train_removed'] = True
else:
self.G[edge[0]][edge[1]]['train_removed'] = False
# Create and process id map
id_map = self._create_id_map()
if isinstance(list(self.G.nodes)[0], int):
conversion = lambda n: int(n)
else:
conversion = lambda n: n
id_map = {conversion(k): int(v) for k, v in id_map.items()}
# Create and process features
features = self._create_features()
if normalize:
train_ids = np.array([
id_map[n] for n in self.G.nodes()
if not self.G.node[n]['val'] and not self.G.node[n]['test']
])
train_feats = features[train_ids]
scaler = StandardScaler()
scaler.fit(train_feats)
features = scaler.transform(features)
print("Finished preprocessing data.")
# print some statistics
self._get_stats()
# Plot degree histogram
self._degree_histogram()
# Add "fake" temporary classes for test nodes in class map
if class_map is not None:
test_nodes = [n for n in self.G.nodes() if self.G.node[n]['test']]
for test_node in test_nodes:
class_map[test_node] = np.zeros(
(len(class_map[list(class_map.keys())[0]]), ), dtype=int)
return self.G, features, id_map, class_map
return self.G, features, id_map
def _add_nodes(self, data, test=False, val=False):
with tqdm(desc="Adding nodes: ", total=len(data), unit="node") as pbar:
for idx in range(len(data)):
self.G.add_node(
data.chapter.iloc[idx],
test=test,
feature=np.concatenate(
(self.embeddings_parser.embed_sequence(
data.chapter_title.iloc[idx], self.embedding_type),
self.embeddings_parser.embed_sequence(
data.chapter_abstract.iloc[idx],
self.embedding_type)),
axis=0).tolist(),
val=val)
pbar.update(1)
print("Nodes in graph: {}.\n".format(self.G.number_of_nodes()))
def _add_edges(self, data):
if self.graph_type == "citations":
self._add_edges_citations(data)
elif self.graph_type == "authors":
self._add_edges_authors(data)
else:
raise KeyError("Graph type unknown.")
def _add_edges_citations(self, data):
"""Adds edges between papers that share a citation.
"""
with tqdm(desc="Adding edges: ", total=len(data)) as pbar:
for idx in range(len(data)):
self.G.add_edges_from([
(data.chapter.iloc[idx],
data.chapter_citations.iloc[idx][i])
for i in range(len(data.chapter_citations.iloc[idx]))
])
pbar.update(1)
print("Edges in graph: {}.\n".format(self.G.number_of_edges()))
def _add_weighted_edges_citations(self, data):
"""Adds edges between papers that share a citation.
"""
with tqdm(desc="Adding edges: ", total=len(data)) as pbar:
for idx in range(len(data)):
self.G.add_edges_from(
[(data.chapter.iloc[idx],
data.chapter_citations.iloc[idx][i])
for i in range(len(data.chapter_citations.iloc[idx]))],
weight=100)
pbar.update(1)
print("Edges in graph: {}.\n".format(self.G.number_of_edges()))
def _add_edges_authors(self, data):
"""Adds edges between papers sharing an author.
"""
data_grouped = data.groupby("author_name")["chapter"].agg(
list).reset_index()
with tqdm(desc="Adding edges: ", total=len(data_grouped)) as pbar:
for idx in range(len(data_grouped)):
self.G.add_edges_from(
combinations(data_grouped.iloc[idx].chapter, 2))
pbar.update(1)
print("Edges in graph: {}.\n".format(self.G.number_of_edges()))
def _add_weighted_edges_authors(self, data):
"""Adds edges between papers sharing an author.
"""
data_grouped = data.groupby("author_name")["chapter"].agg(
list).reset_index()
with tqdm(desc="Adding edges: ", total=len(data_grouped)) as pbar:
for idx in range(len(data_grouped)):
edges = combinations(data_grouped.iloc[idx].chapter, 2)
for edge in edges:
if self.G.has_edge(edge[0], edge[1]):
self.G[edge[0]][edge[1]]["weight"] += 1
else:
self.G.add_edge(edge[0], edge[1], weight=1)
pbar.update(1)
print("Edges in graph: {}.\n".format(self.G.number_of_edges()))
def _create_class_map(self, data):
print("Creating class map.")
nodes = list(self.G.nodes)
class_map = {
nodes[i]: [
int(j) for j in list(
self.label_encoder.transform(
np.array(data[data.chapter == nodes[i]].
conferenceseries).reshape(-1, 1))[0])
]
for i in range(len(nodes))
}
print("Saving class map to disk.")
with open(
os.path.join(self.path_persistent,
self.prefix + "-class_map.json"), "w") as f:
f.write(json.dumps(class_map))
with open(os.path.join(self.path_persistent, "label_encoder.pkl"),
"wb") as f:
pickle.dump(self.label_encoder, f)
def _create_id_map(self):
if self.prefix == "train_val":
print("Creating id map.")
nodes = list(self.G.nodes)
id_map = {nodes[i]: i for i in range(len(nodes))}
if self.prefix == "test":
return id_map
else:
print("Saving id map to disk.")
with open(
os.path.join(self.path_persistent,
self.prefix + "-id_map.json"), "w") as f:
f.write(json.dumps(id_map))
def _create_features(self):
if self.prefix == "train_val":
print("Creating features.")
features = np.array(
[self.G.nodes[node]["feature"] for node in list(self.G.nodes)])
if self.prefix == "test":
return features
else:
print("Saving features to disk.")
np.save(
os.path.join(self.path_persistent, self.prefix + "-feats.npy"),
features)
def _run_random_walks(self, graph, nodes, num_walks):
print("Running random walks.")
walks = run_random_walks(graph, nodes, num_walks=num_walks)
print("Saving random walks to disk.")
with open(
os.path.join(self.path_persistent, self.prefix + "-walks.txt"),
"w") as fp:
fp.write("\n".join([str(w[0]) + "\t" + str(w[1]) for w in walks]))
def _get_stats(self):
degree_sequence = sorted([d for n, d in self.G.degree()], reverse=True)
degree_count = Counter(degree_sequence)
with open(
os.path.join(self.path_persistent, self.prefix + "-stats.txt"),
"w") as fp:
self._print(
"Number of nodes in the graph: {}\n".format(
self.G.number_of_nodes()), fp)
self._print(
"Number of edges in the graph: {}\n".format(
self.G.number_of_edges()), fp)
self._print(
"The graph is connected: {}\n".format(nx.is_connected(self.G)),
fp)
self._print(
"Number of connected components: {}\n".format(
nx.number_connected_components(self.G)), fp)
self._print(
"Number of self-loops: {}\n".format(
nx.number_of_selfloops(self.G)), fp)
self._print("Maximum degree: {}\n".format(max(degree_count)), fp)
self._print("Minimum degree: {}\n".format(min(degree_count)), fp)
self._print(
"Average degree: {}\n".format(
sum(degree_sequence) / len(self.G)), fp)
def _degree_histogram(self):
# Plot degree histogram
degree_sequence = sorted([d for n, d in self.G.degree()], reverse=True)
degree_count = Counter(degree_sequence)
deg, cnt = zip(*degree_count.items())
fig, ax = plt.subplots()
plt.bar(deg, cnt, width=0.80, color='b')
plt.title("Degree Histogram")
plt.ylabel("Count")
plt.xlabel("Degree")
ax.set_xticks([d + 0.4 for d in deg])
ax.set_xticklabels(deg)
plt.savefig(os.path.join(self.path_persistent,
self.prefix + "-degree_histogram.png"),
bbox_inches="tight")
def _print(self, text, f):
print(text)
f.write(text)
def main():
parser = argparse.ArgumentParser(
description='Arguments for data preprocessing.')
parser.add_argument('embedding_type',
choices=[
"AVG_L", "AVG_2L", "AVG_SUM_L4", "AVG_SUM_ALL",
"MAX_2L", "CONC_AVG_MAX_2L",
"CONC_AVG_MAX_SUM_L4", "SUM_L", "SUM_2L"
],
help="Type of embedding.")
parser.add_argument('dataset',
help='Name of the object file that stores the ' +
'training data.')
parser.add_argument('--threshold',
type=int,
default=2,
help='Threshold for edge weights in ' +
'heterogeneous graph.')
parser.add_argument('--gpu',
type=int,
default=0,
help='Which gpu to use.')
args = parser.parse_args()
print("Starting...")
from preprocess_data import Processor
processor = Processor(args.embedding_type, args.dataset,
args.threshold, args.gpu)
processor.training_data()
print("Finished.")
if __name__ == "__main__":
main()
class Processor:
def __init__(self, embedding_type, dataset, gpu=0):
os.environ["CUDA_DEVICE_ORDER"] = "PCI_BUS_ID"
os.environ["CUDA_VISIBLE_DEVICES"] = str(gpu)
self.embedding_type = embedding_type
self.dataset = dataset
self.embeddings_parser = EmbeddingsParser(gpu)
self.timer = Timer()
self.path_persistent = os.path.join(
os.path.dirname(os.path.realpath(__file__)), "..", "..", "..",
"data", "interim", "gat", self.embedding_type, self.dataset)
if not os.path.exists(self.path_persistent):
os.makedirs(self.path_persistent)
def training_data(self):
self.timer.tic()
print("Creating training files.\n")
# Load training and validation data
d_train = DataLoader()
df_train = d_train.training_data_with_abstracts_citations().data
d_val = DataLoader()
df_validation = d_val.validation_data_with_abstracts_citations().data
train_val_data = pd.concat((df_train, df_validation),
axis=0).reset_index(drop=True)
# Create file with feature vectors for both training and validation
# data (as a scipy.sparse.csr.csr_matrix object)
print("Creating feature vectors for training and validation data.")
train_val_features = self._create_features(train_val_data)
print("Created.")
print("Saving to disk...")
allx_file = os.path.join(self.path_persistent,
"ind." + self.dataset + ".allx")
with open(allx_file, "wb") as f:
pickle.dump(train_val_features, f)
print("Saved.\n")
# Create file with feature vectors only for training data
# (as a scipy.sparse.csr.csr_matrix object)
print("Creating feature vectors for training data.")
train_features = train_val_features[:len(df_train)]
print("Created.")
print("Saving to disk...")
x_file = os.path.join(self.path_persistent,
"ind." + self.dataset + ".x")
with open(x_file, "wb") as f:
pickle.dump(train_features, f)
print("Saved.\n")
# Create file with the labels for the training and validation data
# (as a numpy.ndarray object)
print("Creating labels for training and validation data.")
self._train_label_encoder(train_val_data)
train_val_labels = self.label_encoder.transform(
np.array(train_val_data.conferenceseries).reshape(-1, 1))
print("Created")
print("Saving to disk...")
ally_file = os.path.join(self.path_persistent,
"ind." + self.dataset + ".ally")
with open(ally_file, "wb") as f:
pickle.dump(train_val_labels, f)
print("Saved.\n")
# Create file with the labels for the training data
# (as a numpy.ndarray object)
print("Creating labels for training data.")
train_labels = train_val_labels[:len(df_train)]
print("Created.")
print("Saving to disk...")
y_file = os.path.join(self.path_persistent,
"ind." + self.dataset + ".y")
with open(y_file, "wb") as f:
pickle.dump(train_labels, f)
print("Saved.\n")
# Create a dict in the format {index: [index_of_neighbor_nodes]}
# (as a collections.defaultdict object)
print("Creating dictionary of neighbours.")
graph = defaultdict(list)
with tqdm(desc="Adding neighbours: ",
total=len(train_val_data)) as pbar:
for idx in range(len(train_val_data)):
citations_indices = [
train_val_data[train_val_data.chapter ==
citation].index.tolist()
for citation in train_val_data.chapter_citations.iloc[idx]
]
neighbours = [c[0] for c in citations_indices if c]
graph[idx].extend(neighbours)
for node in neighbours:
graph[node].append(idx)
pbar.update(1)
with tqdm(desc="Removing duplicates: ",
total=len(graph.keys())) as pbar:
for idx in range(len(graph.keys())):
graph[idx] = list(set(graph[idx]))
pbar.update(1)
print("Saving to disk...")
graph_file = os.path.join(self.path_persistent,
"ind." + self.dataset + ".graph")
with open(graph_file, "wb") as f:
pickle.dump(graph, f)
print("Saved.\n")
print("Statistics")
print("\tTraining data features: {}.".format(train_features.shape))
print("\tTraining data labels: {}.".format(len(train_labels)))
print("\tTraining and validation data features: {}.".format(
train_val_features.shape))
print("\tTraining and validation data labels: {}.".format(
len(train_val_labels)))
print("\tGraph size: {}.".format(len(graph)))
def _create_features(self, data):
features = []
with tqdm(desc="Creating features: ", total=len(data)) as pbar:
for idx in range(len(data)):
features.append(
np.concatenate((self.embeddings_parser.embed_sequence(
data.chapter_title.iloc[idx], self.embedding_type),
self.embeddings_parser.embed_sequence(
data.chapter_abstract.iloc[idx],
self.embedding_type)),
axis=0).tolist())
pbar.update(1)
return sp.csr.csr_matrix(np.array(features))
def _train_label_encoder(self, data):
self.label_encoder = OneHotEncoder(handle_unknown='ignore',
sparse=False,
dtype=np.int)
labels = data.conferenceseries.unique()
labels = labels.reshape(-1, 1)
self.label_encoder.fit(labels)
with open(os.path.join(self.path_persistent, "label_encoder.pkl"),
"wb") as f:
pickle.dump(self.label_encoder, f)
def test_data(self, df_test, train_features, train_labels,
train_val_features, train_val_labels, graph):
print("Preprocessing data...")
# Load training and validation data
d_train = DataLoader()
df_train = d_train.training_data_with_abstracts_citations().data
d_val = DataLoader()
df_validation = d_val.validation_data_with_abstracts_citations().data
train_val_data = pd.concat((df_train, df_validation),
axis=0).reset_index(drop=True)
# Create the indices of test instances in graph (as a list object)
test_indices = list(df_test.index)
# Create "fake" temporary labels for test data
test_labels = np.zeros((len(df_test), len(train_val_labels[0])),
dtype=int)
# Update graph with test data
print("Updating graph information...")
with tqdm(desc="Adding neighbours: ", total=len(df_test)) as pbar:
for idx in list(df_test.index):
citations_indices = [
train_val_data[train_val_data.chapter ==
citation].index.tolist()
for citation in df_test.chapter_citations.loc[idx]
]
neighbours = [c[0] for c in citations_indices if c]
graph[idx].extend(neighbours)
for node in neighbours:
graph[node].append(idx)
pbar.update(1)
with tqdm(desc="Removing duplicates: ",
total=len(graph.keys())) as pbar:
for idx in range(len(graph.keys())):
graph[idx] = list(set(graph[idx]))
pbar.update(1)
print("Updated.")
# Create feature vectors of test instances
print("Creating features for test data...")
test_features = self._create_features(df_test)
print("Created.")
max_degree = len(max(graph.values(), key=len))
test_idx_range = np.sort(test_indices)
features = sp.vstack((train_val_features, test_features)).tolil()
features[test_indices, :] = features[test_idx_range, :]
adj = nx.adjacency_matrix(nx.from_dict_of_lists(graph))
labels = np.vstack((train_val_labels, test_labels))
labels[test_indices, :] = labels[test_idx_range, :]
idx_test = test_idx_range.tolist()
idx_train = range(len(train_labels))
idx_val = range(len(train_labels), len(train_val_labels))
train_mask = sample_mask(idx_train, labels.shape[0])
val_mask = sample_mask(idx_val, labels.shape[0])
test_mask = sample_mask(idx_test, labels.shape[0])
y_train = np.zeros(labels.shape)
y_val = np.zeros(labels.shape)
y_test = np.zeros(labels.shape)
y_train[train_mask, :] = labels[train_mask, :]
y_val[val_mask, :] = labels[val_mask, :]
y_test[test_mask, :] = labels[test_mask, :]
print("Finished preprocessing data.\n")
print("Adjacency matrix shape: {}.".format(adj.shape))
print("Features matrix shape: {}.".format(features.shape))
print("Graph size: {}.".format(len(graph)))
print("Max degree: {}.\n".format(max_degree))
dataset = [adj, features, y_train, y_test, train_mask, test_mask]
prepared_test_data = self._prepare_test_data(dataset, max_degree)
return prepared_test_data, max_degree
def _prepare_test_data(self, dataset, max_degree):
print("Preparing test data...")
adj, features, y_train, y_test, train_mask, test_mask = dataset
train_index = np.where(train_mask)[0]
adj_train = adj[train_index, :][:, train_index]
y_train = y_train[train_index]
test_index = np.where(test_mask)[0]
y_test = y_test[test_index]
num_train = adj_train.shape[0]
input_dim = features.shape[1]
features = nontuple_preprocess_features(features).todense()
train_features = features[train_index]
norm_adj_train = nontuple_preprocess_adj(adj_train)
norm_adj = nontuple_preprocess_adj(adj)
adj_train, adj_val_train = compute_adjlist(norm_adj_train, max_degree)
train_features = np.concatenate(
(train_features, np.zeros((1, input_dim))))
print("Prepared.\n")
return norm_adj, adj_train, adj_val_train, features, train_features, y_train, y_test, test_index
def main():
parser = argparse.ArgumentParser(
description='Arguments for data preprocessing.')
parser.add_argument('embedding_type',
choices=[
"AVG_L", "AVG_2L", "AVG_SUM_L4", "AVG_SUM_ALL",
"MAX_2L", "CONC_AVG_MAX_2L",
"CONC_AVG_MAX_SUM_L4", "SUM_L", "SUM_2L"
],
help="Type of embedding.")
parser.add_argument('dataset',
help='Name of the object file that stores the ' +
'training data.')
parser.add_argument('--gpu',
type=int,
default=0,
help='Which gpu to use.')
args = parser.parse_args()
print("Starting...")
from preprocess_data import Processor
processor = Processor(args.embedding_type, args.dataset, args.gpu)
processor.training_data()
print("Finished.")
if __name__ == "__main__":
main()
class Processor:
def __init__(self,
embedding_type,
dataset,
graph_type="directed",
threshold=2,
gpu=0):
os.environ["CUDA_DEVICE_ORDER"] = "PCI_BUS_ID"
os.environ["CUDA_VISIBLE_DEVICES"] = str(gpu)
self.embedding_type = embedding_type
self.dataset = dataset
self.graph_type = graph_type
self.threshold = threshold
self.embeddings_parser = EmbeddingsParser(gpu)
self.timer = Timer()
self.path_persistent = os.path.join(
os.path.dirname(os.path.realpath(__file__)), "..", "..", "..",
"data", "interim", "gat", self.embedding_type, self.dataset)
if not os.path.exists(self.path_persistent):
os.makedirs(self.path_persistent)
def training_data(self):
self.timer.tic()
print("Creating training files.\n")
# Load training and validation data
d_train = DataLoader()
df_train = d_train.training_data_with_abstracts_citations().data
d_val = DataLoader()
df_validation = d_val.validation_data_with_abstracts_citations().data
train_val_data = pd.concat((df_train, df_validation),
axis=0).reset_index(drop=True)
# Create file with feature vectors for both training and validation
# data (as a scipy.sparse.csr.csr_matrix object)
print("Creating feature vectors for training and validation data.")
train_val_features = self._create_features(train_val_data)
print("Created.")
print("Saving to disk...")
allx_file = os.path.join(self.path_persistent,
"ind." + self.dataset + ".allx")
with open(allx_file, "wb") as f:
pickle.dump(train_val_features, f)
print("Saved.\n")
# Create file with feature vectors only for training data
# (as a scipy.sparse.csr.csr_matrix object)
print("Creating feature vectors for training data.")
train_features = train_val_features[:len(df_train)]
print("Created.")
print("Saving to disk...")
x_file = os.path.join(self.path_persistent,
"ind." + self.dataset + ".x")
with open(x_file, "wb") as f:
pickle.dump(train_features, f)
print("Saved.\n")
# Create file with the labels for the training and validation data
# (as a numpy.ndarray object)
print("Creating labels for training and validation data.")
self._train_label_encoder(train_val_data)
train_val_labels = self.label_encoder.transform(
np.array(train_val_data.conferenceseries).reshape(-1, 1))
print("Created")
print("Saving to disk...")
ally_file = os.path.join(self.path_persistent,
"ind." + self.dataset + ".ally")
with open(ally_file, "wb") as f:
pickle.dump(train_val_labels, f)
print("Saved.\n")
# Create file with the labels for the training data
# (as a numpy.ndarray object)
print("Creating labels for training data.")
train_labels = train_val_labels[:len(df_train)]
print("Created.")
print("Saving to disk...")
y_file = os.path.join(self.path_persistent,
"ind." + self.dataset + ".y")
with open(y_file, "wb") as f:
pickle.dump(train_labels, f)
print("Saved.\n")
# Create a dict in the format {index: [index_of_neighbor_nodes]}
# (as a collections.defaultdict object)
if self.dataset == "citations":
if self.graph_type == "directed":
graph = self._create_directed_graph(train_val_data)
else:
graph = self._create_undirected_graph(train_val_data)
if self.dataset == "citations_authors_het_edges":
df_train_authors = d_train.author_names().data
df_val_authors = d_val.author_names().data
train_val_authors_data = pd.concat(
(df_train_authors, df_val_authors),
axis=0).reset_index(drop=True)
data_authors = train_val_authors_data.groupby(
"author_name")["chapter"].agg(list).reset_index()
if self.graph_type == "directed":
graph = self._create_heterogeneous_directed_graph(
train_val_data, data_authors)
else:
raise ValueError("Graph type incompatible. Only directed " +
"graph is suported.")
print("Finished creating training files.\n")
print("Statistics")
print("\tTraining data features: {}.".format(train_features.shape))
print("\tTraining data labels: {}.".format(len(train_labels)))
print("\tTraining and validation data features: {}.".format(
train_val_features.shape))
print("\tTraining and validation data labels: {}.".format(
len(train_val_labels)))
print("\tGraph size: {}.".format(len(graph)))
print("\tMax node degree: {}.".format(len(max(graph.values(),
key=len))))
def _create_directed_graph(self, train_val_data):
print("Creating dictionary of neighbours.")
graph = defaultdict(list)
with tqdm(desc="Adding neighbours: ",
total=len(train_val_data)) as pbar:
for idx in range(len(train_val_data)):
citations_indices = [
train_val_data[train_val_data.chapter ==
citation].index.tolist()
for citation in train_val_data.chapter_citations.iloc[idx]
]
graph[idx] = list(set([i[0] for i in citations_indices if i]))
pbar.update(1)
print("Created.")
print("Saving to disk...")
graph_file = os.path.join(self.path_persistent,
"ind." + self.dataset + ".graph_directed")
with open(graph_file, "wb") as f:
pickle.dump(graph, f)
print("Saved.\n")
return graph
def _create_heterogeneous_directed_graph(self, train_val_data,
data_authors):
print("Creating dictionary of neighbours.")
graph = defaultdict(list)
# Add citation edges between papers
with tqdm(desc="Adding citation neighbours: ",
total=len(train_val_data)) as pbar:
for idx in range(len(train_val_data)):
citations_indices = [
train_val_data[train_val_data.chapter ==
citation].index.tolist()
for citation in train_val_data.chapter_citations.iloc[idx]
]
graph[idx] = [(i[0], 100) for i in citations_indices if i]
pbar.update(1)
# Add edges between papers if they share an author
with tqdm(desc="Adding author neighbours: ",
total=len(data_authors)) as pbar:
for idx in range(len(data_authors)):
authors_indices = [
train_val_data[train_val_data.chapter ==
paper].index.tolist()
for paper in data_authors.chapter.iloc[idx]
]
authors_indices = [i[0] for i in authors_indices if i]
edges = [i for i in combinations(authors_indices, 2)]
for edge in edges:
graph[edge[0]].append((edge[1], 1))
pbar.update(1)
# Removed edges with weights below the threshold
for key in graph.keys():
d = defaultdict(int)
for x, y in graph[key]:
d[x] += y
graph[key] = [k for k, v in d.items() if v >= self.threshold]
print("Created.")
print("Saving to disk...")
graph_file = os.path.join(self.path_persistent,
"ind." + self.dataset + ".graph_directed")
with open(graph_file, "wb") as f:
pickle.dump(graph, f)
print("Saved.\n")
return graph
def _create_undirected_graph(self, train_val_data):
print("Creating dictionary of neighbours.")
graph = defaultdict(list)
with tqdm(desc="Adding neighbours: ",
total=len(train_val_data)) as pbar:
for idx in range(len(train_val_data)):
citations_indices = [
train_val_data[train_val_data.chapter ==
citation].index.tolist()
for citation in train_val_data.chapter_citations.iloc[idx]
]
neighbours = [c[0] for c in citations_indices if c]
graph[idx].extend(neighbours)
for node in neighbours:
graph[node].append(idx)
pbar.update(1)
with tqdm(desc="Removing duplicates: ",
total=len(graph.keys())) as pbar:
for idx in range(len(graph.keys())):
graph[idx] = list(set(graph[idx]))
pbar.update(1)
print("Created.")
print("Saving to disk...")
graph_file = os.path.join(self.path_persistent,
"ind." + self.dataset + ".graph")
with open(graph_file, "wb") as f:
pickle.dump(graph, f)
print("Saved.\n")
return graph
def _create_features(self, data):
features = []
with tqdm(desc="Creating features: ", total=len(data)) as pbar:
for idx in range(len(data)):
features.append(
np.concatenate((self.embeddings_parser.embed_sequence(
data.chapter_title.iloc[idx], self.embedding_type),
self.embeddings_parser.embed_sequence(
data.chapter_abstract.iloc[idx],
self.embedding_type)),
axis=0).tolist())
pbar.update(1)
return sp.csr.csr_matrix(np.array(features))
def _train_label_encoder(self, data):
self.label_encoder = OneHotEncoder(handle_unknown='ignore',
sparse=False,
dtype=np.int)
labels = data.conferenceseries.unique()
labels = labels.reshape(-1, 1)
self.label_encoder.fit(labels)
with open(os.path.join(self.path_persistent, "label_encoder.pkl"),
"wb") as f:
pickle.dump(self.label_encoder, f)
def _update_directed_graph(self, graph, train_val_data, df_test):
with tqdm(desc="Adding neighbours: ", total=len(df_test)) as pbar:
for idx in list(df_test.index):
citations_indices = [
train_val_data[train_val_data.chapter ==
citation].index.tolist()
for citation in df_test.chapter_citations.loc[idx]
]
graph[idx] = list(set([i[0] for i in citations_indices if i]))
pbar.update(1)
return graph
def _update_heterogeneous_directed_graph(self, graph, train_val_data,
df_test, data_authors):
with tqdm(desc="Adding citation neighbours: ",
total=len(df_test)) as pbar:
for idx in list(df_test.index):
citations_indices = [
train_val_data[train_val_data.chapter ==
citation].index.tolist()
for citation in df_test.chapter_citations.loc[idx]
]
graph[idx] = [(i[0], 100) for i in citations_indices if i]
pbar.update(1)
with tqdm(desc="Adding author neighbours: ",
total=len(data_authors)) as pbar:
for idx in range(len(data_authors)):
authors_indices = [
train_val_data[train_val_data.chapter ==
paper].index.tolist()
for paper in data_authors.chapter.iloc[idx]
]
authors_indices = [i[0] for i in authors_indices if i]
edges = [i for i in combinations(authors_indices, 2)]
for edge in edges:
graph[edge[0]].append((edge[1], 1))
pbar.update(1)
for key in graph.keys():
d = defaultdict(int)
for e in reversed(graph[key]):
if type(e) is tuple:
if e[0] in d.keys():
d[e[0]] += e[1]
else:
d[e[0]] = e[1]
graph[key].remove(e)
graph[key].extend([k for k, v in d.items() if v >= self.threshold])
return graph
def _update_undirected_graph(self, graph, train_val_data, df_test):
with tqdm(desc="Adding neighbours: ", total=len(df_test)) as pbar:
for idx in list(df_test.index):
citations_indices = [
train_val_data[train_val_data.chapter ==
citation].index.tolist()
for citation in df_test.chapter_citations.loc[idx]
]
neighbours = [c[0] for c in citations_indices if c]
graph[idx].extend(neighbours)
for node in neighbours:
graph[node].append(idx)
pbar.update(1)
with tqdm(desc="Removing duplicates: ",
total=len(graph.keys())) as pbar:
for idx in range(len(graph.keys())):
graph[idx] = list(set(graph[idx]))
pbar.update(1)
return graph
def test_data(self,
df_test,
train_features,
train_labels,
train_val_features,
train_val_labels,
graph,
authors_df=None):
print("Preprocessing data...")
# Load training and validation data
d_train = DataLoader()
df_train = d_train.training_data_with_abstracts_citations().data
d_val = DataLoader()
df_validation = d_val.validation_data_with_abstracts_citations().data
train_val_data = pd.concat((df_train, df_validation),
axis=0).reset_index(drop=True)
# Create the indices of test instances in graph (as a list object)
test_indices = list(df_test.index)
# Create "fake" temporary labels for test data
test_labels = np.zeros((len(df_test), len(train_val_labels[0])),
dtype=int)
# Update graph with test data
print("Updating graph information...")
if self.dataset == "citations":
if self.graph_type == "directed":
graph = self._update_directed_graph(graph, train_val_data,
df_test)
else:
graph = self._update_undirected_graph(graph, train_val_data,
df_test)
if self.dataset == "citations_authors_het_edges":
data_authors = authors_df.groupby("author_name")["chapter"].agg(
list).reset_index()
if self.graph_type == "directed":
graph = self._update_heterogeneous_directed_graph(
graph, train_val_data, df_test, data_authors)
else:
raise ValueError("Graph type incompatible. Only directed " +
"graph is suported.")
print("Updated.")
# Create feature vectors of test instances
print("Creating features for test data...")
test_features = self._create_features(df_test)
print("Created.")
test_idx_range = np.sort(test_indices)
features = sp.vstack((train_val_features, test_features)).tolil()
features[test_indices, :] = features[test_idx_range, :]
adj = nx.adjacency_matrix(nx.from_dict_of_lists(graph))
labels = np.vstack((train_val_labels, test_labels))
labels[test_indices, :] = labels[test_idx_range, :]
idx_test = test_idx_range.tolist()
idx_train = range(len(train_labels))
idx_val = range(len(train_labels), len(train_val_labels))
train_mask = sample_mask(idx_train, labels.shape[0])
val_mask = sample_mask(idx_val, labels.shape[0])
test_mask = sample_mask(idx_test, labels.shape[0])
y_train = np.zeros(labels.shape)
y_val = np.zeros(labels.shape)
y_test = np.zeros(labels.shape)
y_train[train_mask, :] = labels[train_mask, :]
y_val[val_mask, :] = labels[val_mask, :]
y_test[test_mask, :] = labels[test_mask, :]
print("Finished preprocessing data.")
print("Adjacency matrix shape: {}.".format(adj.shape))
print("Features matrix shape: {}.".format(features.shape))
print("Graph size: {}.".format(len(graph)))
return adj, features, y_train, y_test, train_mask, test_mask
def main():
parser = argparse.ArgumentParser(
description='Arguments for data preprocessing.')
parser.add_argument('embedding_type',
choices=[
"AVG_L", "AVG_2L", "AVG_SUM_L4", "AVG_SUM_ALL",
"MAX_2L", "CONC_AVG_MAX_2L",
"CONC_AVG_MAX_SUM_L4", "SUM_L", "SUM_2L"
],
help="Type of embedding.")
parser.add_argument('dataset',
help='Name of the object file that stores the ' +
'training data.')
parser.add_argument('--graph_type',
choices=["directed", "undirected"],
default="directed",
help='The type of graph used ' +
'(directed vs. undirected).')
parser.add_argument('--threshold',
type=int,
default=2,
help='Threshold for edge weights in ' +
'heterogeneous graph.')
parser.add_argument('--gpu',
type=int,
default=0,
help='Which gpu to use.')
args = parser.parse_args()
print("Starting...")
from preprocess_data import Processor
processor = Processor(args.embedding_type, args.dataset,
args.graph_type, args.threshold, args.gpu)
processor.training_data()
print("Finished.")
if __name__ == "__main__":
main()
class Processor:
def __init__(self, embedding_type, gpu=0):
os.environ["CUDA_DEVICE_ORDER"] = "PCI_BUS_ID"
os.environ["CUDA_VISIBLE_DEVICES"] = str(gpu)
self.embedding_type = embedding_type
self.embeddings_parser = EmbeddingsParser(gpu)
self.timer = Timer()
self.path_persistent = os.path.join(
os.path.dirname(os.path.realpath(__file__)), "..", "..", "..",
"data", "interim", "han", self.embedding_type)
if not os.path.exists(self.path_persistent):
os.makedirs(self.path_persistent)
def training_data(self):
self.timer.tic()
print("Creating training files.\n")
# Load training and validation data
d_train = DataLoader()
df_train = d_train.training_data_with_abstracts_citations().data
d_val = DataLoader()
df_validation = d_val.validation_data_with_abstracts_citations().data
train_val_data = pd.concat((df_train, df_validation),
axis=0).reset_index(drop=True)
print("Creating index files for training and validation data.")
train_idx = np.asarray(list(train_val_data.index))[:len(df_train)]
train_idx = np.asarray([train_idx])
val_idx = np.asarray(list(train_val_data.index))[len(df_train):]
val_idx = np.asarray([val_idx])
print("Created.")
print("Saving to disk...")
train_idx_file = os.path.join(self.path_persistent, "train_idx.pkl")
val_idx_file = os.path.join(self.path_persistent, "val_idx.pkl")
with open(train_idx_file, "wb") as f:
pickle.dump(train_idx, f)
with open(val_idx_file, "wb") as f:
pickle.dump(val_idx, f)
print("Saved.")
print("Creating labels for training and validation data.")
self._train_label_encoder(train_val_data)
train_val_labels = self.label_encoder.transform(
np.array(train_val_data.conferenceseries).reshape(-1, 1))
print("Created")
print("Saving to disk...")
labels_file = os.path.join(self.path_persistent, "labels.pkl")
with open(labels_file, "wb") as f:
pickle.dump(train_val_labels, f)
print("Saved.\n")
print("Creating feature vectors for training and validation data.")
train_val_features = self._create_features(train_val_data)
print("Created.")
print("Saving to disk...")
features_file = os.path.join(self.path_persistent, "features.pkl")
with open(features_file, "wb") as f:
pickle.dump(train_val_features, f)
print("Saved.\n")
df_train_authors = d_train.author_names().data
df_val_authors = d_val.author_names().data
train_val_authors_data = pd.concat((df_train_authors, df_val_authors),
axis=0).reset_index(drop=True)
data_authors = train_val_authors_data.groupby(
"author_name")["chapter"].agg(list).reset_index()
print("Creating adjacency matrices...")
PCP = self._create_PCP_adjacency(train_val_data)
PAP = self._create_PAP_adjacency(train_val_data, data_authors)
print("Created.")
print("Finished creating training files.\n")
print("Statistics")
print("\tTraining and validation data features: {}.".format(
train_val_features.shape))
print("\tTraining and validation data labels: {}.".format(
train_val_labels.shape))
print("\tPCP graph size: {}.".format(len(PCP)))
print("\tMax node degree: {}.".format(len(max(PCP.values(), key=len))))
print("\tPAP graph size: {}.".format(len(PAP)))
print("\tMax node degree: {}.".format(len(max(PAP.values(), key=len))))
def test_data(self, df_test, authors_df, train_idx, features, labels, PCP,
PAP):
print("Preprocessing data...")
# Load training and validation data
d_train = DataLoader()
df_train = d_train.training_data_with_abstracts_citations().data
d_val = DataLoader()
df_validation = d_val.validation_data_with_abstracts_citations().data
train_val_data = pd.concat((df_train, df_validation),
axis=0).reset_index(drop=True)
data_authors = authors_df.groupby("author_name")["chapter"].agg(
list).reset_index()
# Create the indices of test instances in graph (as a list object)
test_idx = np.asarray(list(df_test.index))
test_idx = np.asarray([test_idx])
# Create "fake" temporary labels for test data
test_labels = np.zeros((len(df_test), len(labels[0])), dtype=int)
labels = np.vstack((labels, test_labels))
train_mask = sample_mask(train_idx, labels.shape[0])
test_mask = sample_mask(test_idx, labels.shape[0])
y_train = np.zeros(labels.shape)
y_test = np.zeros(labels.shape)
y_train[train_mask, :] = labels[train_mask, :]
y_test[test_mask, :] = labels[test_mask, :]
# Update graph with test data
print("Updating graph information...")
PCP_graph = self._update_PCP_adjacency(PCP, train_val_data, df_test)
PAP_graph = self._update_PAP_adjacency(PAP, train_val_data, df_test,
data_authors)
print("Updated.")
PAP = nx.adjacency_matrix(nx.from_dict_of_lists(PAP_graph))
PCP = nx.adjacency_matrix(nx.from_dict_of_lists(PCP_graph))
row_networks = [PCP, PAP]
print("PCP: {}; PAP: {}".format(PCP.shape, PAP.shape))
# Create feature vectors of test instances
print("Creating features for test data...")
test_features = self._create_features(df_test)
features = np.vstack((features, test_features))
print("Features: {}".format(features.shape))
print("Created.")
print("Finished preprocessing data.")
print("y_train: {}, y_test: {}, train_idx: {}, test_idx: {}".format(
y_train.shape, y_test.shape, train_idx.shape, test_idx.shape))
features_list = [features, features, features]
return row_networks, features_list, y_train, y_test, train_mask, test_mask
def _create_PCP_adjacency(self, data):
print("Creating paper-citation-paper adjacency lists.")
graph = defaultdict(list)
with tqdm(desc="Adding neighbours: ", total=len(data)) as pbar:
for idx in range(len(data)):
citations_indices = [
data[data.chapter == citation].index.tolist()
for citation in data.chapter_citations.iloc[idx]
]
graph[idx] = list(set([i[0] for i in citations_indices if i]))
pbar.update(1)
print("Created.")
print("Saving to disk...")
graph_file = os.path.join(self.path_persistent, "PCP.pkl")
with open(graph_file, "wb") as f:
pickle.dump(graph, f)
print("Saved.\n")
return graph
def _update_PCP_adjacency(self, graph, data, df_test):
print("Updating paper-citation-paper adjacency lists.")
with tqdm(desc="Adding neighbours: ", total=len(df_test)) as pbar:
for idx in list(df_test.index):
citations_indices = [
data[data.chapter == citation].index.tolist()
for citation in df_test.chapter_citations.loc[idx]
]
graph[idx] = list(set([i[0] for i in citations_indices if i]))
pbar.update(1)
print("Updated.")
return graph
def _create_PAP_adjacency(self, data, data_authors):
print("Creating paper-author-paper adjacency lists.")
graph = defaultdict()
for idx in data.index:
graph[idx] = []
# Add edges between papers if they share an author
with tqdm(desc="Adding neighbours: ", total=len(data_authors)) as pbar:
for idx in range(len(data_authors)):
authors_indices = [
data[data.chapter == paper].index.tolist()
for paper in data_authors.chapter.iloc[idx]
]
authors_indices = [i[0] for i in authors_indices if i]
edges = [i for i in combinations(authors_indices, 2)]
for edge in edges:
graph[edge[0]].append(edge[1])
pbar.update(1)
print("Created.")
print("Saving to disk...")
graph_file = os.path.join(self.path_persistent, "PAP.pkl")
with open(graph_file, "wb") as f:
pickle.dump(graph, f)
print("Saved.\n")
return graph
def _update_PAP_adjacency(self, graph, data, df_test, data_authors):
print("Updating paper-author-paper adjacency lists.")
for idx in df_test.index:
graph[idx] = []
with tqdm(desc="Adding neighbours: ", total=len(data_authors)) as pbar:
for idx in range(len(data_authors)):
authors_indices = [
data[data.chapter == paper].index.tolist()
for paper in data_authors.chapter.iloc[idx]
]
authors_indices = [i[0] for i in authors_indices if i]
edges = [i for i in combinations(authors_indices, 2)]
for edge in edges:
graph[edge[0]].append(edge[1])
pbar.update(1)
print("Updated.")
return graph
def _create_features(self, data):
features = []
with tqdm(desc="Creating features: ", total=len(data)) as pbar:
for idx in range(len(data)):
features.append(
np.concatenate((self.embeddings_parser.embed_sequence(
data.chapter_title.iloc[idx], self.embedding_type),
self.embeddings_parser.embed_sequence(
data.chapter_abstract.iloc[idx],
self.embedding_type)),
axis=0).tolist())
pbar.update(1)
return np.asarray(features)
def _train_label_encoder(self, data):
self.label_encoder = OneHotEncoder(handle_unknown='ignore',
sparse=False,
dtype=np.int)
labels = data.conferenceseries.unique()
labels = labels.reshape(-1, 1)
self.label_encoder.fit(labels)
with open(os.path.join(self.path_persistent, "label_encoder.pkl"),
"wb") as f:
pickle.dump(self.label_encoder, f)
def main():
parser = argparse.ArgumentParser(
description='Arguments for data preprocessing.')
parser.add_argument('embedding_type',
choices=[
"AVG_L", "AVG_2L", "AVG_SUM_L4", "AVG_SUM_ALL",
"MAX_2L", "CONC_AVG_MAX_2L",
"CONC_AVG_MAX_SUM_L4", "SUM_L", "SUM_2L"
],
help="Type of embedding.")
parser.add_argument('--gpu',
type=int,
default=0,
help='Which gpu to use.')
args = parser.parse_args()
print("Starting...")
from preprocess_data import Processor
processor = Processor(args.embedding_type, args.gpu)
processor.training_data()
print("Finished.")
if __name__ == "__main__":
main()
def predict(self, test_data, model_checkpoint, gpu_mem_fraction=None):
timer = Timer()
timer.tic()
G = test_data[0]
features = test_data[1]
id_map = test_data[2]
if features is not None:
# pad with dummy zero vector
features = np.vstack([features, np.zeros((features.shape[1], ))])
context_pairs = test_data[3] if self.random_context else None
placeholders = self._construct_placeholders()
minibatch = EdgeMinibatchIterator(G,
id_map,
placeholders,
batch_size=self.batch_size,
max_degree=self.max_degree,
num_neg_samples=self.neg_sample_size,
context_pairs=context_pairs)
adj_info_ph = tf.compat.v1.placeholder(tf.int32,
shape=minibatch.adj.shape)
adj_info = tf.Variable(adj_info_ph, trainable=False, name="adj_info")
model = self._create_model(placeholders, features, adj_info, minibatch)
config = tf.compat.v1.ConfigProto(
log_device_placement=self.log_device_placement)
if gpu_mem_fraction is not None:
config.gpu_options.per_process_gpu_memory_fraction = gpu_mem_fraction
config.gpu_options.allow_growth = True
config.allow_soft_placement = True
# Initialize session
sess = tf.compat.v1.Session(config=config)
merged = tf.compat.v1.summary.merge_all()
# summary_writer = tf.compat.v1.summary.FileWriter(self._log_dir(),
# sess.graph)
# Initialize model saver
saver = tf.compat.v1.train.Saver()
# Init variables
sess.run(tf.compat.v1.global_variables_initializer(),
feed_dict={adj_info_ph: minibatch.adj})
val_adj_info = tf.compat.v1.assign(adj_info, minibatch.test_adj)
# Restore model
print("Restoring trained model.")
checkpoint_file = os.path.join(self._log_dir(), model_checkpoint)
ckpt = tf.compat.v1.train.get_checkpoint_state(checkpoint_file)
if checkpoint_file:
saver.restore(sess, checkpoint_file)
print("Model restored.")
else:
print("This model checkpoint does not exist. The model might " +
"not be trained yet or the checkpoint is invalid.")
# Infer embeddings
sess.run(val_adj_info.op)
print("Computing embeddings...")
val_embeddings = []
finished = False
seen = set([])
nodes = []
iter_num = 0
while not finished:
feed_dict_val, finished, edges = minibatch.incremental_embed_feed_dict(
self.validate_batch_size, iter_num)
iter_num += 1
outs_val = sess.run([model.loss, model.mrr, model.outputs1],
feed_dict=feed_dict_val)
for i, edge in enumerate(edges):
if not edge[0] in seen:
val_embeddings.append(outs_val[-1][i, :])
nodes.append(edge[0])
seen.add(edge[0])
val_embeddings = np.vstack(val_embeddings)
if self.save_embeddings:
print("Saving embeddings...")
if not os.path.exists(self._log_dir()):
os.makedirs(self._log_dir())
np.save(self._log_dir() + "inferred_embeddings.npy",
val_embeddings)
with open(self._log_dir() + "inferred_embeddings_ids.txt",
"w") as fp:
fp.write("\n".join(map(str, nodes)))
print("Embeddings saved.\n")
# Return only the embeddings of the test nodes
test_embeddings_ids = {}
for i, node in enumerate(nodes):
test_embeddings_ids[node] = i
test_nodes = [n for n in G.nodes() if G.node[n]['test']]
test_embeddings = val_embeddings[[
test_embeddings_ids[id] for id in test_nodes
]]
sess.close()
tf.compat.v1.reset_default_graph()
timer.toc()
return test_nodes, test_embeddings
def train(self):
print("Loading data...")
adj_list, features_list, y_train, y_val, train_mask, val_mask = load_data(
self.embedding_type)
print("Loaded.")
nb_nodes = features_list[0].shape[0]
ft_size = features_list[0].shape[1]
nb_classes = y_train.shape[1]
features_list = [features[np.newaxis] for features in features_list]
y_train = y_train[np.newaxis]
y_val = y_val[np.newaxis]
train_mask = train_mask[np.newaxis]
val_mask = val_mask[np.newaxis]
biases_list = [preprocess_adj_bias(adj) for adj in adj_list]
print("Training model...")
timer = Timer()
timer.tic()
print(
"Parameters: batch size={}, nb_nodes={}, ft_size={}, nb_classes={}\n"
.format(self.batch_size, nb_nodes, ft_size, nb_classes))
model = HAN(self.model,
self.hid_units,
self.n_heads,
nb_classes,
nb_nodes,
l2_coef=self.weight_decay,
ffd_drop=self.ffd_drop,
attn_drop=self.attn_drop,
activation=self.nonlinearity,
residual=self.residual)
vlss_mn = np.inf
vacc_mx = 0.0
curr_step = 0
train_loss_avg = 0
train_acc_avg = 0
val_loss_avg = 0
val_acc_avg = 0
train_losses = []
val_losses = []
train_accuracies = []
val_accuracies = []
for epoch in range(self.epochs):
print("\nEpoch {}".format(epoch))
# Training
tr_step = 0
tr_size = features_list[0].shape[0]
while tr_step * self.batch_size < tr_size:
feats_list = [
features[tr_step * self.batch_size:(tr_step + 1) *
self.batch_size] for features in features_list
]
_, train_embed, att_val, acc_tr, loss_value_tr = self._train(
model=model,
inputs_list=feats_list,
bias_mat_list=biases_list,
lbl_in=y_train[tr_step * self.batch_size:(tr_step + 1) *
self.batch_size],
msk_in=train_mask[tr_step * self.batch_size:(tr_step + 1) *
self.batch_size])
train_loss_avg += loss_value_tr
train_acc_avg += acc_tr
tr_step += 1
# Validation
vl_step = 0
vl_size = features_list[0].shape[0]
while vl_step * self.batch_size < vl_size:
feats_list = [
features[vl_step * self.batch_size:(vl_step + 1) *
self.batch_size] for features in features_list
]
_, val_embed, att_val, acc_vl, loss_value_vl = self.evaluate(
model=model,
inputs_list=feats_list,
bias_mat_list=biases_list,
lbl_in=y_val[vl_step * self.batch_size:(vl_step + 1) *
self.batch_size],
msk_in=val_mask[vl_step * self.batch_size:(vl_step + 1) *
self.batch_size])
val_loss_avg += loss_value_vl
val_acc_avg += acc_vl
vl_step += 1
print(
'Training: loss = %.5f, acc = %.5f | Val: loss = %.5f, acc = %.5f'
% (train_loss_avg / tr_step, train_acc_avg / tr_step,
val_loss_avg / vl_step, val_acc_avg / vl_step))
train_losses.append(train_loss_avg / tr_step)
val_losses.append(val_loss_avg / vl_step)
train_accuracies.append(train_acc_avg / tr_step)
val_accuracies.append(val_acc_avg / vl_step)
# Early Stopping
if val_acc_avg / vl_step >= vacc_mx or val_loss_avg / vl_step <= vlss_mn:
if val_acc_avg / vl_step >= vacc_mx and val_loss_avg / vl_step <= vlss_mn:
vacc_early_model = val_acc_avg / vl_step
vlss_early_model = val_loss_avg / vl_step
working_weights = model.get_weights()
print(
"Minimum validation loss ({}), maximum accuracy ({}) so far at epoch {}."
.format(val_loss_avg / vl_step, val_acc_avg / vl_step,
epoch))
self._save_model(model)
vacc_mx = np.max((val_acc_avg / vl_step, vacc_mx))
vlss_mn = np.min((val_loss_avg / vl_step, vlss_mn))
curr_step = 0
else:
curr_step += 1
if curr_step == self.patience:
print("Early stop! Min loss: {}, Max accuracy: {}".format(
vlss_mn, vacc_mx))
print("Early stop model validation loss: {}, accuracy: {}".
format(vlss_early_model, vacc_early_model))
model.set_weights(working_weights)
break
train_loss_avg = 0
train_acc_avg = 0
val_loss_avg = 0
val_acc_avg = 0
print("Training finished.")
training_time = timer.toc()
train_losses = [x.numpy() for x in train_losses]
val_losses = [x.numpy() for x in val_losses]
train_accuracies = [x.numpy() for x in train_accuracies]
val_accuracies = [x.numpy() for x in val_accuracies]
self._plot_losses(train_losses, val_losses)
self._plot_accuracies(train_accuracies, val_accuracies)
self._print_stats(train_losses, val_losses, train_accuracies,
val_accuracies, training_time)
def train(self, train_data, sampler_name='Uniform'):
print("Training model...")
timer = Timer()
timer.tic()
G = train_data[0]
features = train_data[1]
id_map = train_data[2]
if features is not None:
# pad with dummy zero vector
features = np.vstack([features, np.zeros((features.shape[1], ))])
context_pairs = train_data[3] if self.random_context else None
placeholders = self._construct_placeholders()
minibatch = EdgeMinibatchIterator(G,
id_map,
placeholders,
batch_size=self.batch_size,
max_degree=self.max_degree,
num_neg_samples=self.neg_sample_size,
context_pairs=context_pairs)
adj_info_ph = tf.compat.v1.placeholder(tf.int32,
shape=minibatch.adj.shape)
adj_info = tf.Variable(adj_info_ph, trainable=False, name="adj_info")
adj_shape = adj_info.get_shape().as_list()
model = self._create_model(sampler_name, placeholders, features,
adj_info, minibatch)
config = tf.compat.v1.ConfigProto(
log_device_placement=self.log_device_placement)
config.gpu_options.allow_growth = True
config.allow_soft_placement = True
# Initialize session
sess = tf.compat.v1.Session(config=config)
merged = tf.compat.v1.summary.merge_all()
# summary_writer = tf.compat.v1.summary.FileWriter(
# self._log_dir(sampler_name), sess.graph)
# Initialize model saver
saver = tf.compat.v1.train.Saver(max_to_keep=self.epochs)
# Init variables
sess.run(tf.compat.v1.global_variables_initializer(),
feed_dict={adj_info_ph: minibatch.adj})
# Restore params of ML sampler model
if sampler_name == 'ML' or sampler_name == 'FastML':
sampler_vars = tf.compat.v1.get_collection(
tf.compat.v1.GraphKeys.GLOBAL_VARIABLES, scope="MLsampler")
saver_sampler = tf.compat.v1.train.Saver(var_list=sampler_vars)
sampler_model_path = self._sampler_model_path()
saver_sampler.restore(sess, sampler_model_path + 'model.ckpt')
# Loss node path
loss_node_path = self._loss_node_path(sampler_name)
if not os.path.exists(loss_node_path):
os.makedirs(loss_node_path)
# Train model
train_shadow_mrr = None
shadow_mrr = None
total_steps = 0
avg_time = 0.0
epoch_val_costs = []
train_adj_info = tf.compat.v1.assign(adj_info, minibatch.adj)
val_adj_info = tf.compat.v1.assign(adj_info, minibatch.test_adj)
train_losses = []
validation_losses = []
val_cost_ = []
val_mrr_ = []
shadow_mrr_ = []
duration_ = []
ln_acc = sparse.csr_matrix((adj_shape[0], adj_shape[0]),
dtype=np.float32)
lnc_acc = sparse.csr_matrix((adj_shape[0], adj_shape[0]),
dtype=np.int32)
ln_acc = ln_acc.tolil()
lnc_acc = lnc_acc.tolil()
for epoch in range(self.epochs):
minibatch.shuffle()
iter = 0
print('Epoch: %04d' % (epoch))
epoch_val_costs.append(0)
train_loss_epoch = []
validation_loss_epoch = []
while not minibatch.end():
# Construct feed dictionary
feed_dict = minibatch.next_minibatch_feed_dict()
feed_dict.update({placeholders['dropout']: self.dropout})
t = time.time()
# Training step
outs = sess.run([
merged, model.opt_op, model.loss, model.ranks,
model.aff_all, model.mrr, model.outputs1, model.loss_node,
model.loss_node_count
],
feed_dict=feed_dict)
train_cost = outs[2]
train_mrr = outs[5]
train_loss_epoch.append(train_cost)
if train_shadow_mrr is None:
train_shadow_mrr = train_mrr
else:
train_shadow_mrr -= (1 - 0.99) * (train_shadow_mrr -
train_mrr)
if iter % self.validate_iter == 0:
# Validation
sess.run(val_adj_info.op)
val_cost, ranks, val_mrr, duration = self._evaluate(
sess, model, minibatch, size=self.validate_batch_size)
sess.run(train_adj_info.op)
epoch_val_costs[-1] += val_cost
validation_loss_epoch.append(val_cost)
if shadow_mrr is None:
shadow_mrr = val_mrr
else:
shadow_mrr -= (1 - 0.99) * (shadow_mrr - val_mrr)
val_cost_.append(val_cost)
val_mrr_.append(val_mrr)
shadow_mrr_.append(shadow_mrr)
duration_.append(duration)
# if total_steps % self.print_every == 0:
# summary_writer.add_summary(outs[0], total_steps)
# Print results
avg_time = (avg_time * total_steps + time.time() -
t) / (total_steps + 1)
if total_steps % self.print_every == 0:
print(
"Iter: %04d" % iter,
"train_loss={:.5f}".format(train_cost),
"train_mrr={:.5f}".format(train_mrr),
# exponential moving average
"train_mrr_ema={:.5f}".format(train_shadow_mrr),
"val_loss={:.5f}".format(val_cost),
"val_mrr={:.5f}".format(val_mrr),
# exponential moving average
"val_mrr_ema={:.5f}".format(shadow_mrr),
"time={:.5f}".format(avg_time))
ln = outs[7].values
ln_idx = outs[7].indices
ln_acc[ln_idx[:, 0], ln_idx[:, 1]] += ln
lnc = outs[8].values
lnc_idx = outs[8].indices
lnc_acc[lnc_idx[:, 0], lnc_idx[:, 1]] += lnc
iter += 1
total_steps += 1
if total_steps > self.max_total_steps:
break
# Keep track of train and validation losses per epoch
train_losses.append(sum(train_loss_epoch) / len(train_loss_epoch))
validation_losses.append(
sum(validation_loss_epoch) / len(validation_loss_epoch))
# If the epoch has the lowest validation loss so far
if validation_losses[-1] == min(validation_losses):
print(
"Minimum validation loss so far ({}) at epoch {}.".format(
validation_losses[-1], epoch))
# Save loss node and count
loss_node = sparse.save_npz(loss_node_path + 'loss_node.npz',
sparse.csr_matrix(ln_acc))
loss_node_count = sparse.save_npz(
loss_node_path + 'loss_node_count.npz',
sparse.csr_matrix(lnc_acc))
# Save embeddings
if self.save_embeddings and sampler_name is not "Uniform":
sess.run(val_adj_info.op)
self._save_embeddings(sess, model, minibatch,
self.validate_batch_size,
self._log_dir(sampler_name))
# Save model at each epoch
print("Saving model at epoch {}.".format(epoch))
saver.save(
sess,
os.path.join(self._log_dir(sampler_name),
"model_epoch_" + str(epoch) + ".ckpt"))
if total_steps > self.max_total_steps:
break
print("Optimization Finished!")
training_time = timer.toc()
self._plot_losses(train_losses, validation_losses, sampler_name)
self._print_stats(train_losses, validation_losses, training_time,
sampler_name)
class FileParser:
path_raw = os.path.join(os.path.dirname(os.path.realpath(__file__)),
"..", "..", "data", "raw")
path_persistent = os.path.join(os.path.dirname(os.path.realpath(__file__)),
"..", "..", "data", "interim", "parsed_data"
)
def __init__(self):
self.timer = Timer()
self.persistent = {}
self.processes = {
# Old datasets
"old_books": {
"filename": os.path.join(self.path_raw,
old_books_file),
"process_line": "_process_line_old_books",
"persistent_file": os.path.join(self.path_persistent,
"old_books.pkl"),
"persistent_variable": [],
"dataset_format": "ntriples"
},
"old_books_new_books": {
"filename": os.path.join(self.path_raw,
old_books_file),
"process_line": "_process_line_old_books_new_books",
"persistent_file": os.path.join(
self.path_persistent,
"old_books_new_books.pkl"),
"persistent_variable": {},
"dataset_format": "ntriples"
},
"old_books_conferences": {
"filename": os.path.join(self.path_raw,
old_books_file),
"process_line": "_process_line_old_books_conferences",
"persistent_file": os.path.join(
self.path_persistent,
"old_books_conferences.pkl"),
"persistent_variable": {},
"dataset_format": "ntriples"
},
"conferences": {
"filename": os.path.join(self.path_raw,
old_conferences_file),
"process_line": "_process_line_conferences",
"persistent_file": os.path.join(self.path_persistent,
"conferences.pkl"),
"persistent_variable": [],
"dataset_format": "ntriples"
},
"conferences_name": {
"filename": os.path.join(self.path_raw,
old_conferences_file),
"process_line": "_process_line_conferences_name",
"persistent_file": os.path.join(
self.path_persistent, "conferences_name.pkl"),
"persistent_variable": {},
"dataset_format": "ntriples"
},
"conferences_acronym": {
"filename": os.path.join(self.path_raw,
old_conferences_file),
"process_line": "_process_line_conferences_acronym",
"persistent_file": os.path.join(
self.path_persistent,
"conferences_acronym.pkl"),
"persistent_variable": {},
"dataset_format": "ntriples"
},
"conferences_city": {
"filename": os.path.join(self.path_raw,
old_conferences_file),
"process_line": "_process_line_conferences_city",
"persistent_file": os.path.join(
self.path_persistent,
"conferences_city.pkl"),
"persistent_variable": {},
"dataset_format": "ntriples"
},
"conferences_country": {
"filename": os.path.join(self.path_raw,
old_conferences_file),
"process_line": "_process_line_conferences_country",
"persistent_file": os.path.join(
self.path_persistent,
"conferences_country.pkl"),
"persistent_variable": {},
"dataset_format": "ntriples"
},
"conferences_year": {
"filename": os.path.join(self.path_raw,
old_conferences_file),
"process_line": "_process_line_conferences_year",
"persistent_file": os.path.join(
self.path_persistent,
"conferences_year.pkl"),
"persistent_variable": {},
"dataset_format": "ntriples"
},
"conferences_datestart": {
"filename": os.path.join(self.path_raw,
old_conferences_file),
"process_line": "_process_line_conferences_datestart",
"persistent_file": os.path.join(
self.path_persistent,
"conferences_datestart.pkl"),
"persistent_variable": {},
"dataset_format": "ntriples"
},
"conferences_dateend": {
"filename": os.path.join(self.path_raw,
old_conferences_file),
"process_line": "_process_line_conferences_dateend",
"persistent_file": os.path.join(
self.path_persistent,
"conferences_dateend.pkl"),
"persistent_variable": {},
"dataset_format": "ntriples"
},
"conferences_conferenceseries": {
"filename": os.path.join(self.path_raw,
old_conferences_file),
"process_line": "_process_line_conferences_conferenceseries",
"persistent_file": os.path.join(
self.path_persistent,
"conferences_conferenceseries.pkl"),
"persistent_variable": {},
"dataset_format": "ntriples"
},
"conferenceseries": {
"filename": os.path.join(self.path_raw,
old_conferences_file),
"process_line": "_process_line_conferenceseries",
"persistent_file": os.path.join(
self.path_persistent, "conferenceseries.pkl"),
"persistent_variable": [],
"dataset_format": "ntriples"
},
"conferenceseries_name": {
"filename": os.path.join(self.path_raw,
old_conferences_file),
"process_line": "_process_line_conferenceseries_name",
"persistent_file": os.path.join(
self.path_persistent,
"conferenceseries_name.pkl"),
"persistent_variable": {},
"dataset_format": "ntriples"
},
# New datasets
"books": {
"filename": os.path.join(self.path_raw, books_file),
"process_line": "_process_line_books",
"persistent_file": os.path.join(self.path_persistent,
"books.pkl"),
"persistent_variable": [],
"dataset_format": "json"
},
"isbn_books": {
"filename": os.path.join(self.path_raw, books_file),
"process_line": "_process_line_isbn_books",
"persistent_file": os.path.join(self.path_persistent,
"isbn_books.pkl"),
"persistent_variable": {},
"dataset_format": "json"
},
"authors_name": {
"filename": os.path.join(self.path_raw, authors_file),
"process_line": "_process_line_authors_name",
"persistent_file": os.path.join(self.path_persistent,
"authors_name.pkl"),
"persistent_variable": {},
"dataset_format": "json"
},
"chapters": {
"filename": os.path.join(self.path_raw, chapters_file),
"process_line": "_process_line_chapters",
"persistent_file": os.path.join(self.path_persistent,
"chapters.pkl"),
"persistent_variable": [],
"dataset_format": "json"
},
"chapters_title": {
"filename": os.path.join(self.path_raw, chapters_file),
"process_line": "_process_line_chapters_title",
"persistent_file": os.path.join(self.path_persistent,
"chapters_title.pkl"),
"persistent_variable": {},
"dataset_format": "json"
},
"chapters_year": {
"filename": os.path.join(self.path_raw, chapters_file),
"process_line": "_process_line_chapters_year",
"persistent_file": os.path.join(self.path_persistent,
"chapters_year.pkl"),
"persistent_variable": {},
"dataset_format": "json"
},
"chapters_language": {
"filename": os.path.join(self.path_raw, chapters_file),
"process_line": "_process_line_chapters_language",
"persistent_file": os.path.join(
self.path_persistent, "chapters_language.pkl"),
"persistent_variable": {},
"dataset_format": "json"
},
"chapters_abstract": {
"filename": os.path.join(self.path_raw, chapters_file),
"process_line": "_process_line_chapters_abstract",
"persistent_file": os.path.join(
self.path_persistent, "chapters_abstract.pkl"),
"persistent_variable": {},
"dataset_format": "json"
},
"chapters_authors": {
"filename": os.path.join(self.path_raw, chapters_file),
"process_line": "_process_line_chapters_authors",
"persistent_file": os.path.join(
self.path_persistent, "chapters_authors.pkl"),
"persistent_variable": {},
"dataset_format": "json"
},
"chapters_authors_name": {
"filename": os.path.join(self.path_raw, chapters_file),
"process_line": "_process_line_chapters_authors_name",
"persistent_file": os.path.join(
self.path_persistent,
"chapters_authors_name.pkl"),
"persistent_variable": {},
"dataset_format": "json"
},
"chapters_all_citations": {
"filename": os.path.join(self.path_raw, chapters_file),
"process_line": "_process_line_chapters_all_citations",
"persistent_file": os.path.join(
self.path_persistent,
"chapters_all_citations.pkl"),
"persistent_variable": {},
"dataset_format": "json"
},
"chapters_keywords": {
"filename": os.path.join(self.path_raw, chapters_file),
"process_line": "_process_line_chapters_keywords",
"persistent_file": os.path.join(
self.path_persistent, "chapters_keywords.pkl"),
"persistent_variable": {},
"dataset_format": "json"
},
"chapters_books_isbns": {
"filename": os.path.join(self.path_raw, chapters_file),
"process_line": "_process_line_chapters_books_isbns",
"persistent_file": os.path.join(
self.path_persistent,
"chapters_books_isbns.pkl"),
"persistent_variable": {},
"dataset_format": "json"
},
}
def get_data(self, process):
# Check if the data is already present
if (process in self.persistent):
return self.persistent[process]
print("Process '{}' not in memory yet.".format(process))
# Load from persistent file if data already processed
if os.path.isfile(self.processes[process]["persistent_file"]):
with open(self.processes[process]["persistent_file"],
"rb") as f:
self.persistent[process] = pickle.load(f)
return self.persistent[process]
print("Process '{}' not persistent yet. Processing.".format(
process))
# Process the raw data
self.persistent[process] = self.processes[process][
"persistent_variable"]
self._parse_file(
self.processes[process]["filename"],
self.processes[process]["process_line"],
self.persistent[process],
self.processes[process]["dataset_format"]
)
with open(self.processes[process]["persistent_file"], "wb") as f:
pickle.dump(self.persistent[process], f)
return self.persistent[process]
def _parse_file(self, filename, process_line, results, dataset_format):
if dataset_format == "json":
self._process_json_file(filename, process_line, results)
else:
self._process_ntriples_file(filename, process_line, results)
def _process_json_file(self, filename, process_line, results):
print("Computing number of json files.")
with tarfile.open(filename, "r:gz", encoding="utf-8") as tar:
count_files = len(tar.getnames())
print("Finished computing number of files: {}.\n".format(
count_files))
print("Start processing file.\n")
self.timer.tic()
process_line_function = self.__getattribute__(process_line)
with tqdm(desc="Processing files: ", total=count_files,
unit="file") as pbar:
with tarfile.open(filename, "r:gz", encoding="utf-8") as tar:
for member in tar.getmembers():
if "jsonl" in member.name:
file = tar.extractfile(member)
content = [json.loads(line) for line in
file.readlines()]
for line in content:
process_line_function(line, results)
pbar.update(1)
self.timer.toc()
print("Finished processing file.\n\n")
def _process_ntriples_file(self, filename, process_line, results):
print("Computing file size.")
with gzip.open(filename, mode="rt", encoding="utf-8") as f:
file_size = f.seek(0, io.SEEK_END)
print("Finished computing file size: {} bytes.\n".format(
file_size))
print("Start processing file.\n")
self.timer.tic()
process_line_function = self.__getattribute__(process_line)
with tqdm(desc="Processing file: ", total=file_size,
unit="bytes") as pbar:
with gzip.open(filename, mode="rt", encoding="utf-8") as f:
for line in f:
process_line_function(line, results)
pbar.update(len(line))
self.timer.toc()
print("Finished processing file.\n\n")
# Processes implementations
def _process_line_old_books(self, line, results):
line = line.rstrip(" .\n").split(maxsplit=2)
if line[1] == nt_has_conference:
if line[0].startswith(nt_book):
if line[0] not in results:
results.append(line[0])
def _process_line_old_books_new_books(self, line, results):
line = line.rstrip(" .\n").split(maxsplit=2)
if line[1] == nt_webpage:
if line[0].startswith(nt_book):
if line[0] in self.get_data("old_books"):
new_book_id = "sg:pub." + line[2].split(
".com/")[-1].rsplit(">")[0]
results[line[0]] = new_book_id
def _process_line_old_books_conferences(self, line, results):
line = line.rstrip(" .\n").split(maxsplit=2)
if line[1] == nt_has_conference:
if line[0].startswith(nt_book):
results[line[0]] = line[2]
def _process_line_conferences(self, line, results):
line = line.rstrip(" .\n").split(maxsplit=2)
if line[0].startswith(nt_conferences):
if line[0] not in results:
results.append(line[0])
def _process_line_conferences_name(self, line, results):
line = line.rstrip(" .\n").split(maxsplit=2)
if line[1] == nt_name:
if line[0].startswith(nt_conferences):
results[line[0]] = line[2]
def _process_line_conferences_acronym(self, line, results):
line = line.rstrip(" .\n").split(maxsplit=2)
if line[1] == nt_acronym:
if line[0].startswith(nt_conferences):
results[line[0]] = line[2]
def _process_line_conferences_city(self, line, results):
line = line.rstrip(" .\n").split(maxsplit=2)
if line[1] == nt_city:
if line[0].startswith(nt_conferences):
results[line[0]] = line[2]
def _process_line_conferences_country(self, line, results):
line = line.rstrip(" .\n").split(maxsplit=2)
if line[1] == nt_country:
if line[0].startswith(nt_conferences):
results[line[0]] = line[2]
def _process_line_conferences_year(self, line, results):
line = line.rstrip(" .\n").split(maxsplit=2)
if line[1] == nt_year:
if line[0].startswith(nt_conferences):
results[line[0]] = line[2]
def _process_line_conferences_datestart(self, line, results):
line = line.rstrip(" .\n").split(maxsplit=2)
if line[1] == nt_datestart:
if line[0].startswith(nt_conferences):
results[line[0]] = line[2]
def _process_line_conferences_dateend(self, line, results):
line = line.rstrip(" .\n").split(maxsplit=2)
if line[1] == nt_dateend:
if line[0].startswith(nt_conferences):
results[line[0]] = line[2]
def _process_line_conferences_conferenceseries(self, line, results):
line = line.rstrip(" .\n").split(maxsplit=2)
if line[1] == nt_has_conference_series:
results[line[0]] = line[2]
def _process_line_conferenceseries(self, line, results):
line = line.rstrip(" .\n").split(maxsplit=2)
if line[0].startswith(nt_conference_series):
if line[0] not in results:
results.append(line[0])
def _process_line_conferenceseries_name(self, line, results):
line = line.rstrip(" .\n").split(maxsplit=2)
if line[1] == nt_name:
if line[0].startswith(nt_conference_series):
results[line[0]] = line[2]
def _process_line_books(self, line, results):
new_books = list(self.get_data("old_books_new_books").values())
if line["id"] not in results:
if line["id"] in new_books:
results.append(line["id"])
def _process_line_isbn_books(self, line, results):
if "isbn" in line.keys():
if line["id"] in self.get_data("books"):
isbn_list = line["isbn"]
for isbn in isbn_list:
results[isbn] = line["id"]
def _process_line_authors_name(self, line, results):
family_name = line["familyName"] if "familyName" in line.keys() else ""
given_name = line["givenName"] if "givenName" in line.keys() else ""
if not family_name == "Not available":
author_name = family_name + " " + given_name
else:
author_name = ""
results[line["id"]] = author_name
def _process_line_chapters(self, line, results):
if "isPartOf" in line.keys():
if line["id"] not in results:
book = line["isPartOf"]
if "isbn" in book.keys():
isbn_list = book["isbn"]
for isbn in isbn_list:
if isbn in self.get_data("isbn_books"):
results.append(line["id"])
def _process_line_chapters_title(self, line, results):
if "name" in line.keys():
if line["id"] in self.get_data("chapters"):
results[line["id"]] = line["name"]
def _process_line_chapters_year(self, line, results):
if "datePublished" in line.keys():
if line["id"] in self.get_data("chapters"):
year = line["datePublished"].split("-")[0]
results[line["id"]] = year
def _process_line_chapters_language(self, line, results):
if "inLanguage" in line.keys():
if line["id"] in self.get_data("chapters"):
results[line["id"]] = line["inLanguage"][0]
def _process_line_chapters_abstract(self, line, results):
if "description" in line.keys():
if line["id"] in self.get_data("chapters"):
results[line["id"]] = line["description"]
def _process_line_chapters_authors(self, line, results):
if "author" in line.keys():
if line["id"] in self.get_data("chapters"):
authors = line["author"]
authors_id = [authors[i]["id"] for i in
range(len(authors)) if "id" in
authors[i].keys()]
results[line["id"]] = authors_id
def _process_line_chapters_authors_name(self, line, results):
if "author" in line.keys():
if line["id"] in self.get_data("chapters"):
authors = line["author"]
author_names = list()
for i in range(len(authors)):
family_name = authors[i]["familyName"] if \
"familyName" in authors[i].keys() else ""
given_name = authors[i]["givenName"] if "givenName" \
in authors[i].keys() else ""
author_names.append(family_name + " " + given_name)
results[line["id"]] = author_names
def _process_line_chapters_all_citations(self, line, results):
if "citation" in line.keys():
if line["id"] in self.get_data("chapters"):
citations = line["citation"]
citations_id = [citations[i]["id"] for i in range(
len(citations))]
results[line["id"]] = citations_id
def _process_line_chapters_keywords(self, line, results):
if "keywords" in line.keys():
if line["id"] in self.get_data("chapters"):
results[line["id"]] = line["keywords"]
def _process_line_chapters_books_isbns(self, line, results):
if "isPartOf" in line.keys():
if line["id"] in self.get_data("chapters"):
book = line["isPartOf"]
if "isbn" in book.keys():
isbn_list = book["isbn"]
results[line["id"]] = isbn_list
