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.")
def __init__(self, embedding_type, dataset, model_name, max_degree=696,
learning_rate=0.001, weight_decay=5e-4, dropout=0.0,
epochs=300, early_stopping=30, hidden1=16, rank=128, skip=0,
var=0.5, sampler_device="cpu", gpu=None, recs=10):
self.embedding_type = embedding_type
self.dataset = dataset
self.model_name = model_name
self.learning_rate = learning_rate
self.weight_decay = weight_decay
self.dropout = dropout
self.epochs = epochs
self.early_stopping = early_stopping
self.hidden1 = hidden1
self.rank = rank
self.skip = skip
self.var = var
self.sampler_device = sampler_device
self.recs = recs
self.preprocessor = Processor(self.embedding_type, self.dataset, gpu)
self.training_data = self._load_training_data()
if not self._load_label_encoder():
print("The label encoder does not exist.")
def infer_embeddings(self, query, query_authors, graph_type, model,
model_checkpoint, queue):
df_test = pd.DataFrame(query,
columns=[
"chapter", "chapter_title",
"chapter_abstract", "chapter_citations"
])
# Load the training graph
print("Loading {} training graph...".format(graph_type))
G_train = self._load_training_graph(graph_type)
print("Loaded.")
# Load the training walks
print("Loading {} training walks...".format(graph_type))
walks = self._load_training_walks(graph_type, G_train)
print("Loaded.")
print("Preprocessing {} test data...".format(graph_type))
from preprocess_data import Processor
preprocessor = Processor(self.embedding_type, graph_type, self.gpu)
graph, features, id_map = preprocessor.test_data(
df_test, G_train, authors_df=query_authors)
print("Preprocessed.")
print("Inferring embeddings...")
embeddings = model.predict([graph, features, id_map, walks],
model_checkpoint)[1]
print("Inferred.")
queue.put(embeddings)
def __init__(self,
classifier,
embedding_type,
graph_type,
model_checkpoint,
train_prefix,
model_name,
model_size="small",
learning_rate=0.00001,
epochs=10,
dropout=0.0,
weight_decay=0.0,
max_degree=100,
samples_1=25,
samples_2=10,
dim_1=128,
dim_2=128,
random_context=True,
neg_sample_size=20,
batch_size=512,
identity_dim=0,
save_embeddings=False,
base_log_dir='../../../data/processed/graphsage/',
validate_iter=5000,
validate_batch_size=256,
gpu=0,
print_every=50,
max_total_steps=10**10,
log_device_placement=False,
recs=10):
self.classifier = classifier
self.embedding_type = embedding_type
self.graph_type = graph_type
self.model_checkpoint = model_checkpoint
self.recs = recs
os.environ["CUDA_DEVICE_ORDER"] = "PCI_BUS_ID"
os.environ["CUDA_VISIBLE_DEVICES"] = str(gpu)
self.graphsage_model = UnsupervisedModel(
train_prefix, model_name, model_size, learning_rate, epochs,
dropout, weight_decay, max_degree, samples_1, samples_2, dim_1,
dim_2, random_context, neg_sample_size, batch_size, identity_dim,
save_embeddings, base_log_dir, validate_iter, validate_batch_size,
gpu, print_every, max_total_steps, log_device_placement)
self.preprocessor = Processor(self.embedding_type, self.graph_type,
gpu)
self.classifier_file = os.path.join(
self.graphsage_model._log_dir(),
self.classifier.__class__.__name__ + ".pkl")
if not self._load_training_graph():
print("The training graph does not exist.")
if not self._load_training_walks():
print("The walks do not exist.")
def __init__(self,
embedding_type,
graph_type,
train_prefix,
model_name,
model_size="small",
learning_rate=0.001,
epochs=10,
dropout=0.0,
weight_decay=0.0,
max_degree=100,
samples_1=25,
samples_2=10,
samples_3=0,
dim_1=128,
dim_2=128,
batch_size=512,
sigmoid=False,
identity_dim=0,
base_log_dir='../../../data/processed/graphsage/',
validate_iter=5000,
validate_batch_size=256,
gpu=0,
print_every=5,
max_total_steps=10**10,
log_device_placement=False,
recs=10,
threshold=2):
self.embedding_type = embedding_type
self.graph_type = graph_type
self.recs = recs
os.environ["CUDA_DEVICE_ORDER"] = "PCI_BUS_ID"
os.environ["CUDA_VISIBLE_DEVICES"] = str(gpu)
self.graphsage_model = SupervisedModel(
train_prefix, model_name, model_size, learning_rate, epochs,
dropout, weight_decay, max_degree, samples_1, samples_2, samples_3,
dim_1, dim_2, batch_size, sigmoid, identity_dim, base_log_dir,
validate_iter, validate_batch_size, gpu, print_every,
max_total_steps, log_device_placement)
self.preprocessor = Processor(self.embedding_type, self.graph_type,
threshold, gpu)
if not self._load_training_graph():
print("The training graph does not exist.")
if not self._load_training_class_map():
print("The training class map dows not exist.")
if not self._load_label_encoder():
print("The label encoder does not exist.")
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.")
def __init__(self,
embedding_type,
graph_type,
train_prefix,
model_name,
nonlinear_sampler=True,
fast_ver=False,
allhop_rewards=False,
model_size="small",
learning_rate=0.001,
epochs=10,
dropout=0.0,
weight_decay=0.0,
max_degree=100,
samples_1=25,
samples_2=10,
samples_3=0,
dim_1=512,
dim_2=512,
dim_3=0,
batch_size=128,
sigmoid=False,
identity_dim=0,
base_log_dir='../../../data/processed/graphsage_rl/',
validate_iter=5000,
validate_batch_size=128,
gpu=0,
print_every=5,
max_total_steps=10**10,
log_device_placement=False,
recs=10,
threshold=2):
self.embedding_type = embedding_type
self.graph_type = graph_type
self.fast_ver = fast_ver
self.recs = recs
os.environ["CUDA_DEVICE_ORDER"] = "PCI_BUS_ID"
if gpu is not None:
os.environ["CUDA_VISIBLE_DEVICES"] = str(gpu)
else:
os.environ["CUDA_VISIBLE_DEVICES"] = ""
self.graphsage_model = SupervisedModelRL(
train_prefix=train_prefix,
model_name=model_name,
nonlinear_sampler=nonlinear_sampler,
fast_ver=self.fast_ver,
allhop_rewards=allhop_rewards,
model_size=model_size,
learning_rate=learning_rate,
epochs=epochs,
dropout=dropout,
weight_decay=weight_decay,
max_degree=max_degree,
samples_1=samples_1,
samples_2=samples_2,
samples_3=samples_3,
dim_1=dim_1,
dim_2=dim_2,
dim_3=dim_3,
batch_size=batch_size,
sigmoid=sigmoid,
identity_dim=identity_dim,
base_log_dir=base_log_dir,
validate_iter=validate_iter,
validate_batch_size=validate_batch_size,
gpu=None,
print_every=print_every,
max_total_steps=max_total_steps,
log_device_placement=log_device_placement)
self.preprocessor = Processor(self.embedding_type, self.graph_type,
threshold, gpu)
if not self._load_training_graph():
print("The training graph does not exist.")
if not self._load_training_class_map():
print("The training class map dows not exist.")
if not self._load_label_encoder():
print("The label encoder does not exist.")
class GraphSAGERLModel(AbstractModel):
def __init__(self,
embedding_type,
graph_type,
train_prefix,
model_name,
nonlinear_sampler=True,
fast_ver=False,
allhop_rewards=False,
model_size="small",
learning_rate=0.001,
epochs=10,
dropout=0.0,
weight_decay=0.0,
max_degree=100,
samples_1=25,
samples_2=10,
samples_3=0,
dim_1=512,
dim_2=512,
dim_3=0,
batch_size=128,
sigmoid=False,
identity_dim=0,
base_log_dir='../../../data/processed/graphsage_rl/',
validate_iter=5000,
validate_batch_size=128,
gpu=0,
print_every=5,
max_total_steps=10**10,
log_device_placement=False,
recs=10,
threshold=2):
self.embedding_type = embedding_type
self.graph_type = graph_type
self.fast_ver = fast_ver
self.recs = recs
os.environ["CUDA_DEVICE_ORDER"] = "PCI_BUS_ID"
if gpu is not None:
os.environ["CUDA_VISIBLE_DEVICES"] = str(gpu)
else:
os.environ["CUDA_VISIBLE_DEVICES"] = ""
self.graphsage_model = SupervisedModelRL(
train_prefix=train_prefix,
model_name=model_name,
nonlinear_sampler=nonlinear_sampler,
fast_ver=self.fast_ver,
allhop_rewards=allhop_rewards,
model_size=model_size,
learning_rate=learning_rate,
epochs=epochs,
dropout=dropout,
weight_decay=weight_decay,
max_degree=max_degree,
samples_1=samples_1,
samples_2=samples_2,
samples_3=samples_3,
dim_1=dim_1,
dim_2=dim_2,
dim_3=dim_3,
batch_size=batch_size,
sigmoid=sigmoid,
identity_dim=identity_dim,
base_log_dir=base_log_dir,
validate_iter=validate_iter,
validate_batch_size=validate_batch_size,
gpu=None,
print_every=print_every,
max_total_steps=max_total_steps,
log_device_placement=log_device_placement)
self.preprocessor = Processor(self.embedding_type, self.graph_type,
threshold, gpu)
if not self._load_training_graph():
print("The training graph does not exist.")
if not self._load_training_class_map():
print("The training class map dows not exist.")
if not self._load_label_encoder():
print("The label encoder does not exist.")
def query_single(self, query):
"""Queries the model and returns a list of recommendations.
Args:
query (list): The query as needed by the model, is in the form
[chapter_title, chapter_abstract, list(chapter_citations)].
Returns
list: ids of the conferences
double: confidence scores
"""
# Generate an ID for the query
query_id = "new_node_id:" + "-".join(
[str(i) for i in random.sample(range(0, 10000), 5)])
if self.graph_type == "citations":
if len(query) < 3:
raise ValueError("The input does not contain enough data; " +
"chapter title chapter abstract, and " +
"chapter citations are required.")
return self.query_batch([(query_id, query[0], query[1], query[2])])
elif self.graph_type == "citations_authors_het_edges":
if len(query) < 4:
raise ValueError(
"The input does not contain enough data; " +
"chapter title chapter abstract, chapter " +
"citations, and chapter authors are required.")
authors_df = pd.DataFrame({
"author_name": query[3],
"chapter": [query_id] * len(query[3])
})
return self.query_batch(
([(query_id, query[0], query[1], query[2])], authors_df))
else:
raise ValueError("Graph type not recognised.")
def query_batch(self, batch):
"""Queries the model and returns a lis of recommendations.
Args:
batch (list of ntuples): The list of queries as needed
by the model. The ntuples are in the form (chapter_id,
chapter_title, chapter_abstract, list(chapter_citations)).
Returns
list: ids of the conferences
double: confidence scores
"""
if self.graph_type == "citations":
df_test = pd.DataFrame(batch,
columns=[
"chapter", "chapter_title",
"chapter_abstract", "chapter_citations"
])
# Preprocess the data
graph, features, id_map, class_map = self.preprocessor.test_data(
df_test, self.G_train, class_map=self.class_map_train)
elif self.graph_type == "citations_authors_het_edges":
df_test = pd.DataFrame(batch[0],
columns=[
"chapter", "chapter_title",
"chapter_abstract", "chapter_citations"
])
authors_df = batch[1]
# Preprocess the data
graph, features, id_map, class_map = self.preprocessor.test_data(
df_test,
self.G_train,
authors_df=authors_df,
class_map=self.class_map_train)
else:
raise ValueError("Graph type not recognised.")
# Inference on test data
if self.fast_ver:
sampler_name = "FastML"
else:
sampler_name = "ML"
predictions = self.graphsage_model.inference(
[graph, features, id_map, None, class_map], sampler_name)[1]
# Compute predictions
sorted_predictions = (-predictions).argsort(axis=1)
conferences = list()
confidences = list()
for i in range(len(predictions)):
one_hot_preds = np.zeros((self.recs, len(predictions[0])),
dtype=int)
for j in range(self.recs):
one_hot_preds[j][sorted_predictions[i, j]] = 1
conferences.append(
list(
self.label_encoder.inverse_transform(
one_hot_preds).flatten()))
confidences.append(
list(predictions[i, sorted_predictions[:, :self.recs][i]]))
results = [conferences, confidences]
return results
def train(self):
pass
def _load_training_graph(self):
graph_file = os.path.join(os.path.dirname(os.path.realpath(__file__)),
"..", "..", "..", "data", "interim",
"graphsage", self.embedding_type,
self.graph_type, "train_val-G.json")
if os.path.isfile(graph_file):
print("Loading training graph...")
with open(graph_file) as f:
self.G_train = json_graph.node_link_graph(json.load(f))
print("Loaded.")
return True
return False
def _load_training_class_map(self):
class_map_file = os.path.join(
os.path.dirname(os.path.realpath(__file__)), "..", "..", "..",
"data", "interim", "graphsage", self.embedding_type,
self.graph_type, "train_val-class_map.json")
self.class_map_train = {}
if isinstance(list(self.G_train.nodes)[0], int):
conversion = lambda n: int(n)
else:
conversion = lambda n: n
if os.path.isfile(class_map_file):
print("Loading training class map...")
self.class_map_train = json.load(open(class_map_file))
if isinstance(list(self.class_map_train.values())[0], list):
lab_conversion = lambda n: n
else:
lab_conversion = lambda n: int(n)
self.class_map_train = {
conversion(k): lab_conversion(v)
for k, v in self.class_map_train.items()
}
print("Loaded.")
return True
return False
def _load_label_encoder(self):
label_encoder_file = os.path.join(
os.path.dirname(os.path.realpath(__file__)), "..", "..", "..",
"data", "interim", "graphsage", self.embedding_type,
self.graph_type, "label_encoder.pkl")
if os.path.isfile(label_encoder_file):
with open(label_encoder_file, "rb") as f:
print("Loading label encoder.")
self.label_encoder = pickle.load(f)
print("Loaded.")
return True
return False
def __init__(self,
embedding_type,
graph_type,
model_checkpoint,
train_prefix,
model_name,
model_size="small",
learning_rate=0.00001,
epochs=10,
dropout=0.0,
weight_decay=0.0,
max_degree=100,
samples_1=25,
samples_2=10,
dim_1=128,
dim_2=128,
random_context=True,
neg_sample_size=20,
batch_size=512,
identity_dim=0,
save_embeddings=False,
base_log_dir='../../../data/processed/graphsage/',
validate_iter=5000,
validate_batch_size=256,
gpu=0,
print_every=50,
max_total_steps=10**10,
log_device_placement=False,
recs=10):
self.embedding_type = embedding_type
self.graph_type = graph_type
self.model_checkpoint = model_checkpoint
self.recs = recs
self.gpu = gpu
os.environ["CUDA_DEVICE_ORDER"] = "PCI_BUS_ID"
os.environ["CUDA_VISIBLE_DEVICES"] = str(self.gpu)
self.graphsage_model = UnsupervisedModel(
train_prefix, model_name, model_size, learning_rate, epochs,
dropout, weight_decay, max_degree, samples_1, samples_2, dim_1,
dim_2, random_context, neg_sample_size, batch_size, identity_dim,
save_embeddings, base_log_dir, validate_iter, validate_batch_size,
gpu, print_every, max_total_steps, log_device_placement)
self.preprocessor = Processor(self.embedding_type, "citations",
self.gpu)
# Prepare the training data
d_train = DataLoader()
self.df_train = d_train.training_data_with_abstracts_citations().data
print("Loading the training embeddings...")
if not self._load_train_embeddings():
print("The pretrained embeddings are missing.")
else:
print("Loaded.")
training_ids = list(self.df_train.chapter)
self.training_embeddings = self.pretrained_embeddings[[
self.pretrained_embeddings_id_map[id] for id in training_ids
]]
self.sim = Similarities(self.training_embeddings, training_ids)
print("Loading training graph...")
if not self._load_training_graph():
print("The training graph does not exist.")
else:
print("Loaded.")
print("Loading training walks...")
if not self._load_training_walks():
print("The walks do not exist.")
else:
print("Loaded.")
class GraphSAGENeighbourModel(AbstractModel):
def __init__(self,
embedding_type,
graph_type,
model_checkpoint,
train_prefix,
model_name,
model_size="small",
learning_rate=0.00001,
epochs=10,
dropout=0.0,
weight_decay=0.0,
max_degree=100,
samples_1=25,
samples_2=10,
dim_1=128,
dim_2=128,
random_context=True,
neg_sample_size=20,
batch_size=512,
identity_dim=0,
save_embeddings=False,
base_log_dir='../../../data/processed/graphsage/',
validate_iter=5000,
validate_batch_size=256,
gpu=0,
print_every=50,
max_total_steps=10**10,
log_device_placement=False,
recs=10):
self.embedding_type = embedding_type
self.graph_type = graph_type
self.model_checkpoint = model_checkpoint
self.recs = recs
self.gpu = gpu
os.environ["CUDA_DEVICE_ORDER"] = "PCI_BUS_ID"
os.environ["CUDA_VISIBLE_DEVICES"] = str(self.gpu)
self.graphsage_model = UnsupervisedModel(
train_prefix, model_name, model_size, learning_rate, epochs,
dropout, weight_decay, max_degree, samples_1, samples_2, dim_1,
dim_2, random_context, neg_sample_size, batch_size, identity_dim,
save_embeddings, base_log_dir, validate_iter, validate_batch_size,
gpu, print_every, max_total_steps, log_device_placement)
self.preprocessor = Processor(self.embedding_type, "citations",
self.gpu)
# Prepare the training data
d_train = DataLoader()
self.df_train = d_train.training_data_with_abstracts_citations().data
print("Loading the training embeddings...")
if not self._load_train_embeddings():
print("The pretrained embeddings are missing.")
else:
print("Loaded.")
training_ids = list(self.df_train.chapter)
self.training_embeddings = self.pretrained_embeddings[[
self.pretrained_embeddings_id_map[id] for id in training_ids
]]
self.sim = Similarities(self.training_embeddings, training_ids)
print("Loading training graph...")
if not self._load_training_graph():
print("The training graph does not exist.")
else:
print("Loaded.")
print("Loading training walks...")
if not self._load_training_walks():
print("The walks do not exist.")
else:
print("Loaded.")
def query_single(self, query):
"""Queries the model and returns a list of recommendations.
Args:
query (list): The query as needed by the model, is in the form
[chapter_title, chapter_abstract, list(chapter_citations)].
Returns
list: ids of the conferences
double: confidence scores
"""
if len(query) < 3:
raise ValueError("The input does not contain enough data; " +
"chapter title chapter abstract, and chapter " +
"citations are required.")
# Generate an ID for the query
query_id = "new_node_id:" + "-".join(
[str(i) for i in random.sample(range(0, 10000), 5)])
return self.query_batch([(query_id, query[0], query[1], query[2])])
def query_batch(self, batch):
"""Queries the model and returns a lis of recommendations.
Args:
batch (list of ntuples): The list of queries as needed
by the model. The ntuples are in the form (chapter_id,
chapter_title, chapter_abstract, list(chapter_citations)).
Returns
list: ids of the conferences
double: confidence scores
"""
df_test = pd.DataFrame(batch,
columns=[
"chapter", "chapter_title",
"chapter_abstract", "chapter_citations"
])
# Preprocess the data
graph, features, id_map = self.preprocessor.test_data(
df_test, self.G_train)
# Infer embeddings
test_nodes, test_embeddings = self.graphsage_model.predict(
[graph, features, id_map, self.walks], self.model_checkpoint)
# Obtain the most similar neighbours
similarities = []
with tqdm(desc="Computing similarities",
total=len(test_embeddings)) as pbar:
for vector in test_embeddings:
similarities.append(
self.sim.similar_by_vector(vector, topn=self.recs * 10))
pbar.update(1)
# Map similar papers to conferences
conferenceseries = []
confidences = []
with tqdm(desc="Computing conference predicitons.",
total=len(similarities)) as pbar:
for similarity in similarities:
conferences = set()
scores = []
for idx in range(len(similarity)):
conferences_length = len(conferences)
if conferences_length < self.recs:
conferences.add(
list(self.df_train[self.df_train.chapter ==
similarity[idx]
[0]].conferenceseries)[0])
if len(conferences) != conferences_length:
scores.append(similarity[idx][1])
conferenceseries.append(list(conferences))
confidences.append(scores)
pbar.update(1)
results = [conferenceseries, confidences]
return results
def train(self):
pass
def _load_train_embeddings(self):
embeddings_file = os.path.join(self.graphsage_model._log_dir(),
"embeddings.npy")
embeddings_ids_file = os.path.join(self.graphsage_model._log_dir(),
"embeddings_ids.txt")
if os.path.isfile(embeddings_file) and os.path.isfile(
embeddings_ids_file):
self.pretrained_embeddings = np.load(embeddings_file)
self.pretrained_embeddings_id_map = {}
with open(embeddings_ids_file) as f:
for i, line in enumerate(f):
self.pretrained_embeddings_id_map[line.strip()] = i
return True
return False
def _load_training_graph(self):
graph_file = os.path.join(os.path.dirname(os.path.realpath(__file__)),
"..", "..", "..", "data", "interim",
"graphsage", self.embedding_type,
self.graph_type, "train_val-G.json")
if os.path.isfile(graph_file):
with open(graph_file) as f:
self.G_train = json_graph.node_link_graph(json.load(f))
return True
return False
def _load_training_walks(self):
walks_file = os.path.join(os.path.dirname(os.path.realpath(__file__)),
"..", "..", "..", "data", "interim",
"graphsage", self.embedding_type,
self.graph_type, "train_val-walks.txt")
self.walks = []
if isinstance(list(self.G_train.nodes)[0], int):
conversion = lambda n: int(n)
else:
conversion = lambda n: n
if os.path.isfile(walks_file):
with open(walks_file) as f:
for line in f:
self.walks.append(map(conversion, line.split()))
return True
return False
class GraphSAGEClassifierModel(AbstractModel):
def __init__(self,
classifier,
embedding_type,
graph_type,
model_checkpoint,
train_prefix,
model_name,
model_size="small",
learning_rate=0.00001,
epochs=10,
dropout=0.0,
weight_decay=0.0,
max_degree=100,
samples_1=25,
samples_2=10,
dim_1=128,
dim_2=128,
random_context=True,
neg_sample_size=20,
batch_size=512,
identity_dim=0,
save_embeddings=False,
base_log_dir='../../../data/processed/graphsage/',
validate_iter=5000,
validate_batch_size=256,
gpu=0,
print_every=50,
max_total_steps=10**10,
log_device_placement=False,
recs=10):
self.classifier = classifier
self.embedding_type = embedding_type
self.graph_type = graph_type
self.model_checkpoint = model_checkpoint
self.recs = recs
os.environ["CUDA_DEVICE_ORDER"] = "PCI_BUS_ID"
os.environ["CUDA_VISIBLE_DEVICES"] = str(gpu)
self.graphsage_model = UnsupervisedModel(
train_prefix, model_name, model_size, learning_rate, epochs,
dropout, weight_decay, max_degree, samples_1, samples_2, dim_1,
dim_2, random_context, neg_sample_size, batch_size, identity_dim,
save_embeddings, base_log_dir, validate_iter, validate_batch_size,
gpu, print_every, max_total_steps, log_device_placement)
self.preprocessor = Processor(self.embedding_type, self.graph_type,
gpu)
self.classifier_file = os.path.join(
self.graphsage_model._log_dir(),
self.classifier.__class__.__name__ + ".pkl")
if not self._load_training_graph():
print("The training graph does not exist.")
if not self._load_training_walks():
print("The walks do not exist.")
def query_single(self, query):
"""Queries the model and returns a list of recommendations.
Args:
query (list): The query as needed by the model, is in the form
[chapter_title, chapter_abstract, list(chapter_citations)].
Returns
list: ids of the conferences
double: confidence scores
"""
# Generate an ID for the query
query_id = "new_node_id:" + "-".join(
[str(i) for i in random.sample(range(0, 10000), 5)])
if self.graph_type == "citations":
if len(query) < 3:
raise ValueError("The input does not contain enough data; " +
"chapter title chapter abstract, and " +
"chapter citations are required.")
return self.query_batch([(query_id, query[0], query[1], query[2])])
elif self.graph_type == "authors":
if len(query) < 4:
raise ValueError(
"The input does not contain enough data; " +
"chapter title chapter abstract, chapter " +
"citations, and chapter authors are required.")
authors_df = pd.DataFrame({
"author_name": query[3],
"chapter": [query_id] * len(query[3])
})
return self.query_batch([(query_id, query[0], query[1], query[2])],
authors_df)
else:
raise ValueError("Graph type not recognised.")
def query_batch(self, batch):
"""Queries the model and returns a lis of recommendations.
Args:
batch (list of ntuples): The list of queries as needed
by the model. The ntuples are in the form (chapter_id,
chapter_title, chapter_abstract, list(chapter_citations)).
Returns
list: ids of the conferences
double: confidence scores
"""
if self.graph_type == "citations":
df_test = pd.DataFrame(batch,
columns=[
"chapter", "chapter_title",
"chapter_abstract", "chapter_citations"
])
# Preprocess the data
graph, features, id_map = self.preprocessor.test_data(
df_test, self.G_train)
elif self.graph_type == "authors":
df_test = pd.DataFrame(batch[0],
columns=[
"chapter", "chapter_title",
"chapter_abstract", "chapter_citations"
])
authors_df = batch[1]
# Preprocess the data
graph, features, id_map = self.preprocessor.test_data(
df_test, self.G_train, authors_df=authors_df)
else:
raise ValueError("Graph type not recognised.")
# Infer embeddings
test_embeddings = self.graphsage_model.predict(
[graph, features, id_map, self.walks], self.model_checkpoint)[1]
# Compute predictions
predictions = self.classifier.predict_proba(test_embeddings)
sorted_predictions = np.argsort(-np.array(predictions))
conferenceseries = list()
confidences = list()
for index, order in enumerate(sorted_predictions):
conferences = list()
scores = list()
i = 0
while len(conferences) < self.recs:
conf = self.label_encoder.inverse_transform([order[i]
]).tolist()[0]
if conf not in conferences:
conferences.append(conf)
scores.append(predictions[index][order][i])
i += 1
conferenceseries.append(conferences)
confidences.append(scores)
results = [conferenceseries, confidences]
return results
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()
def _load_training_graph(self):
graph_file = os.path.join(os.path.dirname(os.path.realpath(__file__)),
"..", "..", "..", "data", "interim",
"graphsage", self.embedding_type,
self.graph_type, "train_val-G.json")
if os.path.isfile(graph_file):
print("Loading training graph...")
with open(graph_file) as f:
self.G_train = json_graph.node_link_graph(json.load(f))
print("Loaded.")
return True
return False
def _load_training_walks(self):
walks_file = os.path.join(os.path.dirname(os.path.realpath(__file__)),
"..", "..", "..", "data", "interim",
"graphsage", self.embedding_type,
self.graph_type, "train_val-walks.txt")
self.walks = []
if isinstance(list(self.G_train.nodes)[0], int):
conversion = lambda n: int(n)
else:
conversion = lambda n: n
if os.path.isfile(walks_file):
print("Loading training walks...")
with open(walks_file) as f:
for line in f:
self.walks.append(map(conversion, line.split()))
print("Loaded.")
return True
return False
def _load_train_embeddings(self):
embeddings_file = os.path.join(self.graphsage_model._log_dir(),
"embeddings.npy")
embeddings_ids_file = os.path.join(self.graphsage_model._log_dir(),
"embeddings_ids.txt")
if os.path.isfile(embeddings_file) and os.path.isfile(
embeddings_ids_file):
self.pretrained_embeddings = np.load(embeddings_file)
self.pretrained_embeddings_id_map = {}
with open(embeddings_ids_file) as f:
for i, line in enumerate(f):
self.pretrained_embeddings_id_map[line.strip()] = i
return True
return False
def _load_model_classifier(self):
if os.path.isfile(self.classifier_file):
print("Loading classifier...")
with open(self.classifier_file, "rb") as f:
self.label_encoder, self.labels, self.classifier = pickle.load(
f)
print("Loaded.")
return True
return False
def _save_model_classifier(self):
with open(self.classifier_file, "wb") as f:
pickle.dump([self.label_encoder, self.labels, self.classifier],
f,
protocol=4)
def _has_persistent_model(self):
if os.path.isfile(self.classifier_file):
return True
return False
class ASGCNModel(AbstractModel):
def __init__(self, embedding_type, dataset, model_name, max_degree=696,
learning_rate=0.001, weight_decay=5e-4, dropout=0.0,
epochs=300, early_stopping=30, hidden1=16, rank=128, skip=0,
var=0.5, sampler_device="cpu", gpu=None, recs=10):
self.embedding_type = embedding_type
self.dataset = dataset
self.model_name = model_name
self.learning_rate = learning_rate
self.weight_decay = weight_decay
self.dropout = dropout
self.epochs = epochs
self.early_stopping = early_stopping
self.hidden1 = hidden1
self.rank = rank
self.skip = skip
self.var = var
self.sampler_device = sampler_device
self.recs = recs
self.preprocessor = Processor(self.embedding_type, self.dataset, gpu)
self.training_data = self._load_training_data()
if not self._load_label_encoder():
print("The label encoder does not exist.")
def query_single(self, query):
"""Queries the model and returns a list of recommendations.
Args:
query (list): The query as needed by the model, is in the form
[chapter_title, chapter_abstract, list(chapter_citations)].
Returns
list: ids of the conferences
double: confidence scores
"""
# Generate an ID for the query
if len(query) < 3:
raise ValueError("The input does not contain enough data; " +
"chapter title, chapter abstract, and chapter " +
"citations are required.")
return self.query_batch([(query[0], query[1], query[2])])
def query_batch(self, batch):
"""Queries the model and returns a lis of recommendations.
Args:
batch (list of ntuples): The list of queries as needed
by the model. The ntuples are in the form (chapter_id,
chapter_title, chapter_abstract, list(chapter_citations)).
Returns
list: ids of the conferences
double: confidence scores
"""
if len(batch) == 3:
df_test = pd.DataFrame(batch,
columns=["chapter_title",
"chapter_abstract",
"chapter_citations"])
else:
df_test_extended = pd.DataFrame(batch,
columns=["chapter",
"chapter_title",
"chapter_abstract",
"chapter_citations"])
df_test = df_test_extended[["chapter_title", "chapter_abstract",
"chapter_citations"]]
train_features, train_labels, train_val_features, train_val_labels, graph = self.training_data
# Reindex test dataframe such that indices follow those from the
# train data
df_test.index = range(train_val_features.shape[0],
train_val_features.shape[0] + len(df_test))
# Preprocess the data
test_data, max_degree = self.preprocessor.test_data(
df_test, train_features, train_labels, train_val_features,
train_val_labels, graph)
# Inference on test data
asgcn_model = ASGCN(
self.embedding_type, self.dataset, self.model_name, max_degree,
self.learning_rate, self.weight_decay, self.dropout,
self.epochs, self.early_stopping, self.hidden1, self.rank,
self.skip, self.var, self.sampler_device, gpu=None)
predictions = asgcn_model.test(test_data)
# Compute predictions
sorted_predictions = (-predictions).argsort(axis=1)
conferences = list()
confidences = list()
for i in range(len(predictions)):
one_hot_preds = np.zeros((self.recs, len(predictions[0])),
dtype=int)
for j in range(self.recs):
one_hot_preds[j][sorted_predictions[i, j]] = 1
conferences.append(list(self.label_encoder.inverse_transform(
one_hot_preds).flatten()))
confidences.append(list(
predictions[i, sorted_predictions[:, :self.recs][i]]))
results = [conferences, confidences]
return results
def train(self):
pass
def _load_training_data(self):
print("Loading training data.")
path_persistent = os.path.join(
os.path.dirname(os.path.realpath(__file__)),
"..", "..", "..", "data", "interim", "gat",
self.embedding_type, self.dataset)
names = ['x', 'y', 'allx', 'ally', 'graph']
objects = []
for i in range(len(names)):
with open(path_persistent + "/ind.{}.{}".format(
self.dataset, names[i]), 'rb') as f:
objects.append(pickle.load(f, encoding='latin1'))
x, y, allx, ally, graph = tuple(objects)
print("Loaded.")
return x, y, allx, ally, graph
def _load_label_encoder(self):
label_encoder_file = os.path.join(
os.path.dirname(os.path.realpath(__file__)),
"..", "..", "..", "data", "interim", "gat",
self.embedding_type, self.dataset, "label_encoder.pkl")
if os.path.isfile(label_encoder_file):
with open(label_encoder_file, "rb") as f:
print("Loading label encoder.")
self.label_encoder = pickle.load(f)
print("Loaded.")
return True
return False
