# Checkpoint directory. Tensorflow assumes this directory already exists so we need to create it
checkpoint_dir = os.path.abspath(os.path.join(out_dir, "checkpoints"))
checkpoint_prefix = os.path.join(checkpoint_dir, "model")
if not os.path.exists(checkpoint_dir): # 如果路径不存在就创建一个
os.makedirs(checkpoint_dir)
saver = tf.train.Saver(tf.global_variables(), max_to_keep=FLAGS.num_checkpoints)
# Write vocabulary
vocab_processor.save(os.path.join(checkpoint_dir, "vocab"))
# Initialize all variables
sess.run(tf.global_variables_initializer())
if not FLAGS.random:
vocabulary = vocab_processor.vocabulary_
initW = None
initW = data_helpers.load_embedding_vectors_word2vec(vocabulary, "./data/GoogleNews-vectors-negative300.bin", True)
print("word2vec file has been loaded")
# initW = data_helpers.load_embedding_vectors_glove(vocabulary,
# "./data/glove.6B.300d.txt", FLAGS.embedding_dim)
# print("glove file has been loaded")
sess.run(rnn.W.assign(initW))
def train_step(x_batch, y_batch):
"""
A single training step
"""
feed_dict = { # 给placeholder喂数据
rnn.input_x: x_batch,
rnn.input_y: y_batch,
rnn.dropout_keep_prob: FLAGS.dropout_keep_prob,
}
# Write vocabulary
vocab_processor.save(os.path.join(out_dir, "vocab"))
# Initialize all variables
#from here to line 203 added
sess.run(tf.global_variables_initializer())
if FLAGS.enable_word_embeddings and cfg['word_embeddings'][
'default'] is not None:
vocabulary = vocab_processor.vocabulary_
initW = None
if embedding_name == 'word2vec':
# load embedding vectors from the word2vec
print("Load word2vec file {}".format(
cfg['word_embeddings']['word2vec']['path']))
initW = data_helpers.load_embedding_vectors_word2vec(
vocabulary, cfg['word_embeddings']['word2vec']['path'],
cfg['word_embeddings']['word2vec']['binary'])
print("word2vec file has been loaded")
elif embedding_name == 'glove':
# load embedding vectors from the glove
print("Load glove file {}".format(
cfg['word_embeddings']['glove']['path']))
initW = data_helpers.load_embedding_vectors_glove(
vocabulary, cfg['word_embeddings']['glove']['path'],
embedding_dimension)
print("glove file has been loaded\n")
sess.run(cnn.W.assign(initW))
# learning rate was added as one of the parameters
def train_step(x_batch, y_batch, learning_rate):
"""
if not os.path.exists(checkpoint_dir):
os.makedirs(checkpoint_dir)
saver = tf.train.Saver(tf.global_variables(),
max_to_keep=FLAGS.num_checkpoints)
# Write vocabulary
vocab_processor.save(os.path.join(out_dir, "vocab"))
# Initialize all variables
sess.run(tf.global_variables_initializer())
# Load word2vec embeddings (Uncomment for word2vec stuff, if it actually works)
if FLAGS.embedding_path:
print('Loading word2vec embeddings...')
vocabulary = vocab_processor.vocabulary_
initW = data_helpers.load_embedding_vectors_word2vec(
vocabulary, FLAGS.embedding_path, True)
sess.run(cnn.W.assign(initW))
else:
warnings.warn(
'Pre-trained word vectors are not being used for this session.'
)
def train_step(x_batch, y_batch):
"""
A single training step
"""
feed_dict = {
cnn.input_x: x_batch,
cnn.input_y: y_batch,
cnn.dropout_keep_prob: FLAGS.dropout_keep_prob
}
num_filters=num_filters,
l2_reg_lambda=l2_reg_lambda)
# Define Training procedure
global_step = tf.Variable(0, name="global_step", trainable=False)
optimizer = tf.train.AdamOptimizer(1e-3)
grads_and_vars = optimizer.compute_gradients(cnn.loss)
train_op = optimizer.apply_gradients(grads_and_vars,
global_step=global_step)
# Initialize all variables
sess.run(tf.global_variables_initializer())
initW = None
# load embedding vectors from the word2vec
initW = data_helpers.load_embedding_vectors_word2vec(
vocabulary, word2vec_model_path, word2vec_binary)
print("word2vec file has been loaded")
sess.run(cnn.W.assign(initW))
def train_step(x_batch, y_batch):
feed_dict = {
cnn.input_x: x_batch,
cnn.input_y: y_batch,
cnn.dropout_keep_prob: dropout_keep_prob
}
_, step, loss, accuracy = sess.run(
[train_op, global_step, cnn.loss, cnn.accuracy], feed_dict)
time_str = datetime.datetime.now().isoformat()
print("{}: step {}, loss {:g}, acc {:g}".format(
time_str, step, loss, accuracy))
def train(x_train, y_train, vocab_processor, x_dev, y_dev):
# Training
# ==================================================
with tf.Graph().as_default():
session_conf = tf.ConfigProto(
allow_soft_placement=FLAGS.allow_soft_placement,
log_device_placement=FLAGS.log_device_placement)
sess = tf.Session(config=session_conf)
with sess.as_default():
cnn = TextCNN(
sequence_length=x_train.shape[1], #56
num_classes=y_train.shape[1], #2
vocab_size=len(vocab_processor.vocabulary_), #18765? 18758 √
embedding_size=FLAGS.embedding_dim, #128
filter_sizes=list(map(
int, FLAGS.filter_sizes.split(","))), #[3,4,5]
num_filters=FLAGS.num_filters, #128
l2_reg_lambda=FLAGS.l2_reg_lambda) #0
# Define Training procedure
global_step = tf.Variable(0, name="global_step", trainable=False)
optimizer = tf.train.AdamOptimizer(1e-3)
grads_and_vars = optimizer.compute_gradients(cnn.loss)
train_op = optimizer.apply_gradients(grads_and_vars,
global_step=global_step)
# Keep track of gradient values and sparsity (optional)
grad_summaries = []
for g, v in grads_and_vars:
if g is not None:
grad_hist_summary = tf.summary.histogram(
"{}/grad/hist".format(v.name), g)
sparsity_summary = tf.summary.scalar(
"{}/grad/sparsity".format(v.name),
tf.nn.zero_fraction(g))
grad_summaries.append(grad_hist_summary)
grad_summaries.append(sparsity_summary)
grad_summaries_merged = tf.summary.merge(grad_summaries)
# Output directory for models and summaries
timestamp = str(int(time.time()))
out_dir = os.path.abspath(
os.path.join(os.path.curdir, "runs", timestamp))
print("Writing to {}\n".format(out_dir))
# Summaries for loss and accuracy
loss_summary = tf.summary.scalar("loss", cnn.loss)
acc_summary = tf.summary.scalar("accuracy", cnn.accuracy)
# Train Summaries
train_summary_op = tf.summary.merge(
[loss_summary, acc_summary, grad_summaries_merged])
train_summary_dir = os.path.join(out_dir, "summaries", "train")
train_summary_writer = tf.summary.FileWriter(
train_summary_dir, sess.graph)
# Dev summaries
dev_summary_op = tf.summary.merge([loss_summary, acc_summary])
dev_summary_dir = os.path.join(out_dir, "summaries", "dev")
dev_summary_writer = tf.summary.FileWriter(dev_summary_dir,
sess.graph)
# Checkpoint directory. Tensorflow assumes this directory already exists so we need to create it
checkpoint_dir = os.path.abspath(
os.path.join(out_dir, "checkpoints"))
checkpoint_prefix = os.path.join(checkpoint_dir, "model")
if not os.path.exists(checkpoint_dir):
os.makedirs(checkpoint_dir)
saver = tf.train.Saver(tf.global_variables(),
max_to_keep=FLAGS.num_checkpoints)
# Write vocabulary
vocab_processor.save(os.path.join(out_dir, "vocab"))
# Initialize all variables
sess.run(tf.global_variables_initializer())
vocabulary = vocab_processor.vocabulary_
initW = None
initW = data_helpers.load_embedding_vectors_word2vec(
vocabulary, './GoogleNews-vectors-negative300.bin', True)
print("word2vec file has been loaded")
sess.run(cnn.W.assign(initW))
def train_step(x_batch, y_batch):
"""
A single training step
"""
feed_dict = {
cnn.input_x: x_batch,
cnn.input_y: y_batch,
cnn.dropout_keep_prob: FLAGS.dropout_keep_prob #0.5
}
_, step, summaries, loss, accuracy = sess.run([
train_op, global_step, train_summary_op, cnn.loss,
cnn.accuracy
], feed_dict)
time_str = datetime.datetime.now().isoformat()
print("{}: step {}, loss {:g}, acc {:g}".format(
time_str, step, loss, accuracy))
train_summary_writer.add_summary(summaries, step)
def dev_step(x_batch, y_batch, writer=None):
"""
Evaluates model on a dev set
"""
feed_dict = {
cnn.input_x: x_batch,
cnn.input_y: y_batch,
cnn.dropout_keep_prob: 1.0
}
step, summaries, loss, accuracy = sess.run(
[global_step, dev_summary_op, cnn.loss, cnn.accuracy],
feed_dict)
time_str = datetime.datetime.now().isoformat()
print("{}: step {}, loss {:g}, acc {:g}".format(
time_str, step, loss, accuracy))
if writer:
writer.add_summary(summaries, step)
# Generate batches
batches = data_helpers.batch_iter(list(zip(x_train, y_train)),
FLAGS.batch_size,
FLAGS.num_epochs)
# Training loop. For each batch...
for batch in batches:
#print (batch[0])
x_batch, y_batch = zip(
*batch) #x_batch = 64 * 56 y_batch = 64 * 2
train_step(x_batch, y_batch)
current_step = tf.train.global_step(sess, global_step)
if current_step % FLAGS.evaluate_every == 0: #100次
print("\nEvaluation:")
dev_step(x_dev, y_dev, writer=dev_summary_writer)
print("")
if current_step % FLAGS.checkpoint_every == 0: #100次
path = saver.save(sess,
checkpoint_prefix,
global_step=current_step)
print("Saved model checkpoint to {}\n".format(path))
def train(self):
# Training
# ==================================================
if self.x_train is None:
self.preprocess()
with tf.Graph().as_default():
session_conf = tf.ConfigProto(
allow_soft_placement=FLAGS.allow_soft_placement,
log_device_placement=FLAGS.log_device_placement)
sess = tf.Session(config=session_conf)
with sess.as_default():
cnn = TextCNN(sequence_length=self.x_train.shape[1],
num_classes=self.y_train.shape[1],
vocab_size=len(self.vocab_processor.vocabulary_),
embedding_size=self.embedding_dimension,
filter_sizes=list(
map(int, FLAGS.filter_sizes.split(","))),
num_filters=FLAGS.num_filters,
l2_reg_lambda=FLAGS.l2_reg_lambda)
# Define Training procedure
print("Define Training procedure")
global_step = tf.Variable(0,
name="global_step",
trainable=False)
optimizer = tf.train.GradientDescentOptimizer(
cnn.learning_rate)
grads_and_vars = optimizer.compute_gradients(cnn.loss)
train_op = optimizer.apply_gradients(grads_and_vars,
global_step=global_step)
# Keep track of gradient values and sparsity (optional)
print("Keep track of gradient values and sparsity (optional)")
grad_summaries = []
for g, v in grads_and_vars:
if g is not None:
grad_hist_summary = tf.summary.histogram(
"{}/grad/hist".format(v.name), g)
sparsity_summary = tf.summary.scalar(
"{}/grad/sparsity".format(v.name),
tf.nn.zero_fraction(g))
grad_summaries.append(grad_hist_summary)
grad_summaries.append(sparsity_summary)
grad_summaries_merged = tf.summary.merge(grad_summaries)
# Output directory for models and summaries
print("Output directory for models and summaries")
out_dir = os.path.abspath(
os.path.join(os.path.curdir, "runs", self.dataset_name,
str(self.embedding_name)))
print("Writing to {}\n".format(out_dir))
# Summaries for loss and accuracy
loss_summary = tf.summary.scalar("loss", cnn.loss)
acc_summary = tf.summary.scalar("accuracy", cnn.accuracy)
# Train Summaries
train_summary_op = tf.summary.merge(
[loss_summary, acc_summary, grad_summaries_merged])
train_summary_dir = os.path.join(out_dir, "summaries", "train")
train_summary_writer = tf.summary.FileWriter(
train_summary_dir, sess.graph)
# Dev summaries
dev_summary_op = tf.summary.merge([loss_summary, acc_summary])
dev_summary_dir = os.path.join(out_dir, "summaries", "dev")
dev_summary_writer = tf.summary.FileWriter(
dev_summary_dir, sess.graph)
# Checkpoint directory. Tensorflow assumes this directory already exists so we need to create it
checkpoint_dir = os.path.abspath(
os.path.join(out_dir, "checkpoints"))
checkpoint_prefix = os.path.join(checkpoint_dir, "model")
if not os.path.exists(checkpoint_dir):
os.makedirs(checkpoint_dir)
saver = tf.train.Saver(tf.global_variables(),
max_to_keep=FLAGS.num_checkpoints)
# Write vocabulary
print("Write vocabulary")
self.vocab_processor.save(os.path.join(out_dir, "vocab"))
# Initialize all variables
print("Initialize all variables")
sess.run(tf.global_variables_initializer())
if self.embedding_name is not None and self.cfg is not None:
vocabulary = self.vocab_processor.vocabulary_
initW = None
if self.embedding_name == 'word2vec':
# load embedding vectors from the word2vec
print("Load word2vec file {}".format(
self.cfg['word_embeddings']['word2vec']['path']))
initW = data_helpers.load_embedding_vectors_word2vec(
vocabulary,
self.cfg['word_embeddings']['word2vec']['path'],
self.cfg['word_embeddings']['word2vec']['binary'])
print("word2vec file has been loaded")
elif self.embedding_name == 'glove':
# load embedding vectors from the glove
print("Load glove file {}".format(
self.cfg['word_embeddings']['glove']['path']))
initW = data_helpers.load_embedding_vectors_glove(
vocabulary,
self.cfg['word_embeddings']['glove']['path'],
self.embedding_dimension)
print("glove file has been loaded\n")
if initW is not None:
sess.run(cnn.W.assign(initW))
else:
print(
"HIGH ALERT - cnn.W not assigned. initW is None\n")
def train_step(x_batch, y_batch, learning_rate):
"""
A single training step
"""
feed_dict = {
cnn.input_x: x_batch,
cnn.input_y: y_batch,
cnn.dropout_keep_prob: FLAGS.dropout_keep_prob,
cnn.learning_rate: learning_rate
}
_, step, summaries, loss, accuracy = sess.run([
train_op, global_step, train_summary_op, cnn.loss,
cnn.accuracy
], feed_dict)
time_str = datetime.datetime.now().isoformat()
if step % 50 == 0:
print(
"{}: step {}, loss {:g}, acc {:g}, learning_rate {:g}"
.format(time_str, step, loss, accuracy,
learning_rate))
train_summary_writer.add_summary(summaries, step)
def dev_step(x_batch, y_batch, writer=None):
"""
Evaluates model on a dev set
"""
feed_dict = {
cnn.input_x: x_batch,
cnn.input_y: y_batch,
cnn.dropout_keep_prob: 1.0
}
step, summaries, loss, accuracy = sess.run(
[global_step, dev_summary_op, cnn.loss, cnn.accuracy],
feed_dict)
time_str = datetime.datetime.now().isoformat()
print("{}: step {}, loss {:g}, acc {:g}".format(
time_str, step, loss, accuracy))
if writer:
writer.add_summary(summaries, step)
def get_learning_rate(decay_speed, counter):
# # It uses dynamic learning rate with a high value at the beginning to speed up the training
# max_learning_rate = 0.005
# min_learning_rate = 0.0001
# learning_rate = min_learning_rate + (max_learning_rate - min_learning_rate) * 0.25 * math.exp(
# -counter / decay_speed)
# # print("decay speed: {}. counter: {}. learning_rate: {}".format(decay_speed, counter, learning_rate))
# return learning_rate
return 0.0005
# Generate batches
print("Generate batches")
batches = data_helpers.batch_iter(
list(zip(self.x_train, self.y_train)), FLAGS.batch_size,
FLAGS.num_epochs)
decay_speed = FLAGS.decay_coefficient * len(
self.y_train) / FLAGS.batch_size
# Training loop. For each batch...
print("Training loop. For each batch...")
counter = 0
for batch in batches:
learning_rate = get_learning_rate(decay_speed, counter)
counter += 1
x_batch, y_batch = zip(*batch)
train_step(x_batch, y_batch, learning_rate)
current_step = tf.train.global_step(sess, global_step)
if current_step % FLAGS.evaluate_every == 0:
print("\nEvaluation:")
dev_step(self.x_eval,
self.y_eval,
writer=dev_summary_writer)
print()
if current_step % FLAGS.checkpoint_every == 0:
path = saver.save(sess,
checkpoint_prefix,
global_step=current_step)
print("\tSaved model checkpoint to {}\n".format(path))
print("End training. counter: {}. batch size: {}\n".format(
counter, FLAGS.batch_size))
def main():
import time
start_time = time.time()
FLAGS = flagClass()
with open("config.yml", 'r') as ymlfile:
cfg = yaml.load(ymlfile)
dataset_name = cfg["datasets"]["default"]
if FLAGS.enable_word_embeddings and cfg['word_embeddings'][
'default'] is not None:
embedding_name = cfg['word_embeddings']['default']
embedding_dimension = cfg['word_embeddings'][embedding_name][
'dimension']
else:
embedding_dimension = FLAGS.embedding_dim
# Data Preparation
# ==================================================
# Load data
print("Loading data...")
datasets = None
if dataset_name == "mrpolarity":
datasets = data_helpers.get_datasets_mrpolarity(
cfg["datasets"][dataset_name]["positive_data_file"]["path"],
cfg["datasets"][dataset_name]["negative_data_file"]["path"])
elif dataset_name == 'spamham':
datasets = data_helpers.get_datasets_mrpolarity(
cfg["datasets"][dataset_name]["spam_file"]["path"],
cfg["datasets"][dataset_name]["ham_file"]["path"])
elif dataset_name == "20newsgroup":
datasets = data_helpers.get_datasets_20newsgroup(
subset="train",
categories=cfg["datasets"][dataset_name]["categories"],
shuffle=cfg["datasets"][dataset_name]["shuffle"],
random_state=cfg["datasets"][dataset_name]["random_state"])
elif dataset_name == "dbpedia":
datasets = data_helpers.get_datasets_dbpedia(
cfg["datasets"][dataset_name]["train_file"]["path"],
cfg["datasets"][dataset_name]["train_file"]["limit"])
elif dataset_name == "email":
datasets = data_helpers.get_datasets_email(
container_path=cfg["datasets"][dataset_name]["container_path"],
categories=cfg["datasets"][dataset_name]["categories"],
shuffle=cfg["datasets"][dataset_name]["shuffle"],
random_state=cfg["datasets"][dataset_name]["random_state"])
elif dataset_name == "localdata":
datasets = data_helpers.get_datasets_localdata(
container_path=cfg["datasets"][dataset_name]["container_path"],
categories=cfg["datasets"][dataset_name]["categories"],
shuffle=cfg["datasets"][dataset_name]["shuffle"],
random_state=cfg["datasets"][dataset_name]["random_state"])
x_text, y = data_helpers.load_data_labels(datasets)
# Build vocabulary
# To limit memory usage, you can cut off input text to first 40 words
# Other research has shown that first 40 words in text (IMDB dataset?)
# were representative of the content of the sentence for classification
# purposes - Comment out one of the two lines below
# max_document_length = max([len(x.split(" ")) for x in x_text])
max_document_length = 40 # read up to 40 words from each sentence
vocab_processor = learn.preprocessing.VocabularyProcessor(
max_document_length)
x = np.array(list(vocab_processor.fit_transform(x_text)))
# Randomly shuffle data
np.random.seed(10)
shuffle_indices = np.random.permutation(np.arange(len(y)))
x_shuffled = x[shuffle_indices]
y_shuffled = y[shuffle_indices]
# Split train/test set
# TODO: This is very crude, should use cross-validation
dev_sample_index = -1 * int(FLAGS.dev_sample_percentage * float(len(y)))
x_train, x_dev = x_shuffled[:dev_sample_index], x_shuffled[
dev_sample_index:]
y_train, y_dev = y_shuffled[:dev_sample_index], y_shuffled[
dev_sample_index:]
print("Vocabulary Size: {:d}".format(len(vocab_processor.vocabulary_)))
print("Train/Dev split: {:d}/{:d}".format(len(y_train), len(y_dev)))
print('Sequence_length={}'.format(x_train.shape[1]))
# Training
# ==================================================
with tf.Graph().as_default():
session_conf = tf.ConfigProto(
allow_soft_placement=FLAGS.allow_soft_placement,
log_device_placement=FLAGS.log_device_placement)
sess = tf.Session(config=session_conf)
with sess.as_default():
cnn = TextCNN(sequence_length=x_train.shape[1],
num_classes=y_train.shape[1],
vocab_size=len(vocab_processor.vocabulary_),
embedding_size=embedding_dimension,
filter_sizes=list(
map(int, FLAGS.filter_sizes.split(","))),
num_filters=FLAGS.num_filters,
l2_reg_lambda=FLAGS.l2_reg_lambda)
# Define Training procedure
global_step = tf.Variable(0, name="global_step", trainable=False)
optimizer = tf.train.AdamOptimizer(cnn.learning_rate)
grads_and_vars = optimizer.compute_gradients(cnn.loss)
train_op = optimizer.apply_gradients(grads_and_vars,
global_step=global_step)
# Keep track of gradient values and sparsity (optional)
grad_summaries = []
for g, v in grads_and_vars:
if g is not None:
grad_hist_summary = tf.summary.histogram(
"{}/grad/hist".format(v.name), g)
sparsity_summary = tf.summary.scalar(
"{}/grad/sparsity".format(v.name),
tf.nn.zero_fraction(g))
grad_summaries.append(grad_hist_summary)
grad_summaries.append(sparsity_summary)
grad_summaries_merged = tf.summary.merge(grad_summaries)
# Output directory for models and summaries
timestamp = str(int(time.time()))
out_dir = os.path.abspath(
os.path.join(os.path.curdir, "runs", timestamp))
print("Writing to {}\n".format(out_dir))
# Summaries for loss and accuracy
loss_summary = tf.summary.scalar("loss", cnn.loss)
acc_summary = tf.summary.scalar("accuracy", cnn.accuracy)
# Train Summaries
train_summary_op = tf.summary.merge(
[loss_summary, acc_summary, grad_summaries_merged])
train_summary_dir = os.path.join(out_dir, "summaries", "train")
train_summary_writer = tf.summary.FileWriter(
train_summary_dir, sess.graph)
# Dev summaries
dev_summary_op = tf.summary.merge([loss_summary, acc_summary])
dev_summary_dir = os.path.join(out_dir, "summaries", "dev")
dev_summary_writer = tf.summary.FileWriter(dev_summary_dir,
sess.graph)
# Checkpoint directory. Tensorflow assumes this directory already exists so we need to create it
checkpoint_dir = os.path.abspath(
os.path.join(out_dir, "checkpoints"))
checkpoint_prefix = os.path.join(checkpoint_dir, "model")
if not os.path.exists(checkpoint_dir):
os.makedirs(checkpoint_dir)
saver = tf.train.Saver(tf.global_variables(),
max_to_keep=FLAGS.num_checkpoints)
# Write vocabulary
vocab_processor.save(os.path.join(out_dir, "vocab"))
# Initialize all variables
sess.run(tf.global_variables_initializer())
if FLAGS.enable_word_embeddings and cfg['word_embeddings'][
'default'] is not None:
vocabulary = vocab_processor.vocabulary_
initW = None
if embedding_name == 'word2vec':
# load embedding vectors from the word2vec
print("Load word2vec file {}".format(
cfg['word_embeddings']['word2vec']['path']))
initW = data_helpers.load_embedding_vectors_word2vec(
vocabulary, cfg['word_embeddings']['word2vec']['path'],
cfg['word_embeddings']['word2vec']['binary'])
print("word2vec file has been loaded")
elif embedding_name == 'glove':
# load embedding vectors from the glove
print("Load glove file {}".format(
cfg['word_embeddings']['glove']['path']))
initW = data_helpers.load_embedding_vectors_glove(
vocabulary, cfg['word_embeddings']['glove']['path'],
embedding_dimension)
print("glove file has been loaded\n")
sess.run(cnn.W.assign(initW))
def train_step(x_batch, y_batch, learning_rate):
"""
A single training step
"""
feed_dict = {
cnn.input_x: x_batch,
cnn.input_y: y_batch,
cnn.dropout_keep_prob: FLAGS.dropout_keep_prob,
cnn.learning_rate: learning_rate
}
_, step, summaries, loss, accuracy = sess.run([
train_op, global_step, train_summary_op, cnn.loss,
cnn.accuracy
], feed_dict)
time_str = datetime.datetime.now().isoformat()
print("{}: step {}, loss {:g}, acc {:g}, learning_rate {:g}".
format(time_str, step, loss, accuracy, learning_rate))
train_summary_writer.add_summary(summaries, step)
def dev_step(x_batch, y_batch, writer=None):
"""
Evaluates model on a dev set
"""
feed_dict = {
cnn.input_x: x_batch,
cnn.input_y: y_batch,
cnn.dropout_keep_prob: 1.0
}
step, summaries, loss, accuracy, gr = sess.run([
global_step, dev_summary_op, cnn.loss, cnn.accuracy,
cnn.grad
], feed_dict)
time_str = datetime.datetime.now().isoformat()
print("{}: step {}, loss {:g}, acc {:g}, gr {}".format(
time_str, step, loss, accuracy, gr))
if writer:
writer.add_summary(summaries, step)
# Generate batches
batches = data_helpers.batch_iter(list(zip(x_train, y_train)),
FLAGS.batch_size,
FLAGS.num_epochs)
print("Number of epochs: {}".format(FLAGS.num_epochs))
num_batches_per_epoch = int(
(len(list(zip(x_train, y_train))) - 1) / FLAGS.batch_size) + 1
print("Batches per epoch: {}".format(num_batches_per_epoch))
print("Batch size: {}".format(FLAGS.batch_size))
# It uses dynamic learning rate with a high value at the beginning to speed up the training
max_learning_rate = 0.005
min_learning_rate = 0.0001
decay_speed = FLAGS.decay_coefficient * len(
y_train) / FLAGS.batch_size
# Training loop. For each batch...
counter = 0
for batch in batches:
learning_rate = min_learning_rate + (
max_learning_rate - min_learning_rate) * math.exp(
-counter / decay_speed)
counter += 1
x_batch, y_batch = zip(*batch)
train_step(x_batch, y_batch, learning_rate)
current_step = tf.train.global_step(sess, global_step)
if current_step % FLAGS.evaluate_every == 0:
print("\nEvaluation:")
dev_step(x_dev, y_dev, writer=dev_summary_writer)
print("")
if current_step % FLAGS.checkpoint_every == 0:
path = saver.save(sess,
checkpoint_prefix,
global_step=current_step)
print("Saved model checkpoint to {}\n".format(path))
print("runtime was " + str(time.time() - start_time))
def train(x_train, y_train, vocab_processor, x_test, y_test, x_valid, y_valid,
report_df, current_fold, df_valid):
# Training
# ==================================================
with tf.Graph().as_default():
session_conf = tf.ConfigProto(
allow_soft_placement=FLAGS.allow_soft_placement,
log_device_placement=FLAGS.log_device_placement)
sess = tf.Session(config=session_conf)
with sess.as_default():
cnn = TextCNN(sequence_length=x_train.shape[1],
num_classes=y_train.shape[1],
vocab_size=len(vocab_processor.vocabulary_),
embedding_size=FLAGS.embedding_dim,
filter_sizes=list(
map(int, FLAGS.filter_sizes.split(","))),
num_filters=FLAGS.num_filters,
l2_reg_lambda=FLAGS.l2_reg_lambda)
# Define Training procedure
global_step = tf.Variable(0, name="global_step", trainable=False)
optimizer = tf.train.AdamOptimizer(1e-3)
grads_and_vars = optimizer.compute_gradients(cnn.loss)
train_op = optimizer.apply_gradients(grads_and_vars,
global_step=global_step)
# Keep track of gradient values and sparsity (optional)
grad_summaries = []
for g, v in grads_and_vars:
if g is not None:
grad_hist_summary = tf.summary.histogram(
"{}/grad/hist".format(v.name), g)
sparsity_summary = tf.summary.scalar(
"{}/grad/sparsity".format(v.name),
tf.nn.zero_fraction(g))
grad_summaries.append(grad_hist_summary)
grad_summaries.append(sparsity_summary)
grad_summaries_merged = tf.summary.merge(grad_summaries)
# Output directory for models and summaries
timestamp = str(int(time.time()))
out_dir = os.path.abspath(
os.path.join(os.path.curdir, "runs", timestamp))
print("Writing to {}\n".format(out_dir))
# Summaries for loss and accuracy
loss_summary = tf.summary.scalar("loss", cnn.loss)
acc_summary = tf.summary.scalar("accuracy", cnn.accuracy)
# Train Summaries
train_summary_op = tf.summary.merge(
[loss_summary, acc_summary, grad_summaries_merged])
train_summary_dir = os.path.join(out_dir, "summaries", "train")
train_summary_writer = tf.summary.FileWriter(
train_summary_dir, sess.graph)
# Dev summaries
dev_summary_op = tf.summary.merge([loss_summary, acc_summary])
dev_summary_dir = os.path.join(out_dir, "summaries", "dev")
dev_summary_writer = tf.summary.FileWriter(dev_summary_dir,
sess.graph)
# Checkpoint directory. Tensorflow assumes this directory already exists so we need to create it
checkpoint_dir = os.path.abspath(
os.path.join(out_dir, "checkpoints"))
checkpoint_prefix = os.path.join(checkpoint_dir, "model")
if not os.path.exists(checkpoint_dir):
os.makedirs(checkpoint_dir)
saver = tf.train.Saver(tf.global_variables(),
max_to_keep=FLAGS.num_checkpoints)
# Write vocabulary
vocab_processor.save(os.path.join(out_dir, "vocab"))
# Initialize all variables
sess.run(tf.global_variables_initializer())
## code by Sven
vocabulary = vocab_processor.vocabulary_
initW = None
# load embedding vectors from the word2vec
print("Load word2vec file {}".format(FLAGS.embedding_path))
initW = data_helpers.load_embedding_vectors_word2vec(
vocabulary, FLAGS.embedding_path, FLAGS.embedding_bin)
print("word2vec file has been loaded")
sess.run(cnn.W.assign(initW))
## end of change
def train_step(x_batch, y_batch):
"""
A single training step
"""
feed_dict = {
cnn.input_x: x_batch,
cnn.input_y: y_batch,
cnn.dropout_keep_prob: FLAGS.dropout_keep_prob
}
_, step, summaries, loss, accuracy = sess.run([
train_op, global_step, train_summary_op, cnn.loss,
cnn.accuracy
], feed_dict)
time_str = datetime.datetime.now().isoformat()
print("{}: step {}, loss {:g}, acc {:g}".format(
time_str, step, loss, accuracy))
train_summary_writer.add_summary(summaries, step)
def dev_step(x_batch, y_batch, writer=None):
"""
Evaluates model on a dev set
"""
feed_dict = {
cnn.input_x: x_batch,
cnn.input_y: y_batch,
cnn.dropout_keep_prob: 1.0
}
step, summaries, loss, accuracy = sess.run(
[global_step, dev_summary_op, cnn.loss, cnn.accuracy],
feed_dict)
# compute f1 score
labels = np.array(y_batch)[:, 1]
prediction = cnn.predictions.eval(feed_dict)
f1 = f1_score(labels, prediction)
time_str = datetime.datetime.now().isoformat()
print("{}: step {}, loss {:g}, acc {:g} f1 {:g}".format(
time_str, step, loss, accuracy, f1))
if writer:
writer.add_summary(summaries, step)
return accuracy, f1
# Generate batches
batches = data_helpers.batch_iter(list(zip(x_train, y_train)),
FLAGS.batch_size,
FLAGS.num_epochs)
# Training loop. For each batch...
for batch in batches:
x_batch, y_batch = zip(*batch)
train_step(x_batch, y_batch)
current_step = tf.train.global_step(sess, global_step)
if current_step % FLAGS.evaluate_every == 0:
print("\nTest evaluation:")
dev_step(x_test, y_test, writer=dev_summary_writer)
print("")
if current_step % FLAGS.checkpoint_every == 0:
path = saver.save(sess,
checkpoint_prefix,
global_step=current_step)
print("Saved model checkpoint to {}\n".format(path))
print("\nEnd test evaluation:")
acc_score_in_cat, f1_score_in_cat = dev_step(
x_test, y_test, writer=dev_summary_writer)
print("\nEnd val evaluation:")
acc_score_out_of_cat, f1_score_out_of_cat = dev_step(
x_valid, y_valid, writer=dev_summary_writer)
cat_dict = {}
for category in df_valid.category.unique():
mask = df_valid['category'] == category
category_df = df_valid[mask]
category_array = np.array(category_df['text'].values.tolist())
category_label = np.array(
category_df['labels'].values.tolist())
print(category_array.shape)
print(x_valid.shape)
print(category_label.shape)
print(y_valid.shape)
cat_acc, cat_f1 = dev_step(category_array, category_label)
cat_dict[category + "-f1"] = cat_f1
cat_dict[category + "-acc"] = cat_acc
name = 'fold-' + str(current_fold)
report_df.append([
name, acc_score_in_cat, f1_score_in_cat, acc_score_out_of_cat,
f1_score_out_of_cat
] + list(cat_dict.values()))
return list(cat_dict.keys())
checkpoint_prefix = os.path.join(checkpoint_dir, "model")
if not os.path.exists(checkpoint_dir):
os.makedirs(checkpoint_dir)
saver = tf.train.Saver(tf.global_variables(),
max_to_keep=FLAGS.num_checkpoints)
# Write vocabulary
vocab_processor.save(os.path.join(out_dir, "vocab"))
# Initialize all variables
sess.run(tf.global_variables_initializer())
if FLAGS.model_type != "rand":
if FLAGS.word2vec != None:
print("Load word2vec file {}\n".format(FLAGS.word2vec))
initW = data_helpers.load_embedding_vectors_word2vec(
vocab_processor.vocabulary_, FLAGS.word2vec, True)
print("The word2vec file {} is loaded!\n".format(
FLAGS.word2vec))
sess.run(cnn.W.assign(initW))
if FLAGS.model_type == "multichannel":
sess.run(cnn.W_MultiChannel.assign(initW))
def train_step(x_batch, y_batch):
"""
A single training step
"""
feed_dict = {
cnn.input_x: x_batch,
cnn.input_y: y_batch,
