def generate_keyword_mask(self, context_ids):
"""Generate mask to only keep the related keywords' Q-value.
"""
self.kg_adjacency_matrix = tf.cond(
pred=tf.equal(tx.global_mode(), tf.estimator.ModeKeys.TRAIN),
true_fn=lambda: self.train_kg_adjacency_matrix,
false_fn=lambda: tf.cond(
pred=tf.equal(tx.global_mode(), tf.estimator.ModeKeys.EVAL),
true_fn=lambda: self.valid_kg_adjacency_matrix,
false_fn=lambda: self.test_kg_adjacency_matrix))
context_ids = tf.cast(context_ids, tf.int64)
# shape of adj_matrix_context_ids: [_cur_keywords_len,]
adj_matrix_context_ids = self.map_vocab_ids_to_adj_matrix_ids(
context_ids)
# shape of context_related_adj_matrix: [#adj_matrix_context_ids, adj_matrix_size]
context_related_adj_matrix = tf.gather(self.kg_adjacency_matrix,
adj_matrix_context_ids)
# shape of keyword_mask: [adj_matrix_size,]
keyword_mask = tf.reduce_max(context_related_adj_matrix, axis=0)
num_related_keywords = tf.reduce_sum(
tf.cast(tf.equal(keyword_mask, 1.), tf.float32))
no_related_keywords = tf.equal(num_related_keywords, 0.)
ones_tensor = tf.ones(shape=[self.adj_matrix_size])
# if no related keywords for current context, keep all keywords' Q-value
keyword_mask = tf.cond(pred=no_related_keywords,
true_fn=lambda: ones_tensor,
false_fn=lambda: keyword_mask)
# remove the <PAD> dimension
keyword_mask = keyword_mask[1:]
return keyword_mask
def _train_epoch(sess, initial=False):
"""Trains on the training set, and evaluates on the dev set
periodically.
"""
iterator.restart_dataset(sess, 'train')
while True:
try:
# (1) Get data and yy sample
fetches_data = {
'batch': batch,
'batch_size': batch_size,
}
feed_dict_data = {
iterator.handle: iterator.get_handle(sess, 'train'),
tx.global_mode(): tf.estimator.ModeKeys.PREDICT,
}
rets_data = sess.run(fetches_data, feed_dict_data)
# (2) Optimize loss
feed_dict = {
#x1_ids: rets_data['batch']['x1_ids'],
x1_len: rets_data['batch']['x1_len'],
x1x4_ids: rets_data['batch']['x1x4_ids'],
x1x4_len: rets_data['batch']['x1x4_len'],
tau: config_train.tau,
tx.global_mode(): tf.estimator.ModeKeys.TRAIN,
}
fetches = {
'train_op': train_op,
'step': global_step,
}
fetches.update(loss_dict)
rets = sess.run(fetches, feed_dict)
step = rets['step']
dis_steps = config_train.display_steps
if _is_head() and dis_steps > 0 and step % dis_steps == 0:
_log_losses(rets, step)
eval_steps = config_train.eval_steps
if _is_head() and eval_steps > 0 and step % eval_steps == 0:
_dev_epoch(sess)
sample_steps = config_train.sample_steps
if _is_head() and sample_steps > 0 and step % sample_steps == 0:
print('-----------testing-----------------')
_test_epoch(sess, step=step)
ckpt_steps = config_train.checkpoint_steps
if _is_head() and ckpt_steps > 0 and step % ckpt_steps == 0:
ckpt_fn = os.path.join(output_dir, 'model.ckpt')
ckpt_fn = saver.save(sess, ckpt_fn, global_step=step)
_log('Checkpoint to {}'.format(ckpt_fn))
except tf.errors.OutOfRangeError:
break
def _eval_epoch(sess, epoch, mode):
references, hypotheses = [], []
bsize = test_batch_size
fetches = {
'inferred_ids': inferred_ids,
}
bno=0
while True:
#print("Temp",temp)
try:
print("Batch",bno)
feed_dict = {
iterator.handle: iterator.get_handle(sess, 'eval'),
tx.global_mode(): tf.estimator.ModeKeys.EVAL,
}
op = sess.run([batch],feed_dict)
feed_dict = {
src_input_ids:op[0]['src_input_ids'],
src_segment_ids : op[0]['src_segment_ids'],
tx.global_mode(): tf.estimator.ModeKeys.EVAL
}
fetches_ = sess.run(fetches, feed_dict=feed_dict)
labels = op[0]['tgt_labels']
hypotheses.extend(h.tolist() for h in fetches_['inferred_ids'])
references.extend(r.tolist() for r in labels)
hypotheses = utils.list_strip_eos(hypotheses, eos_token_id)
references = utils.list_strip_eos(references, eos_token_id)
bno = bno+1
except tf.errors.OutOfRangeError:
break
if mode == 'eval':
# Writes results to files to evaluate BLEU
# For 'eval' mode, the BLEU is based on token ids (rather than
# text tokens) and serves only as a surrogate metric to monitor
# the training process
fname = os.path.join(model_dir, 'tmp.eval')
hypotheses = tx.utils.str_join(hypotheses)
references = tx.utils.str_join(references)
hyp_fn, ref_fn = tx.utils.write_paired_text(
hypotheses, references, fname, mode='s')
eval_bleu = bleu_wrapper(ref_fn, hyp_fn, case_sensitive=True)
eval_bleu = 100. * eval_bleu
logger.info('epoch: %d, eval_bleu %.4f', epoch, eval_bleu)
print('epoch: %d, eval_bleu %.4f' % (epoch, eval_bleu))
if eval_bleu > best_results['score']:
logger.info('epoch: %d, best bleu: %.4f', epoch, eval_bleu)
best_results['score'] = eval_bleu
best_results['epoch'] = epoch
model_path = os.path.join(model_dir, 'best-model.ckpt')
logger.info('saving model to %s', model_path)
print('saving model to %s' % model_path)
saver.save(sess, model_path)
def train(self):
batch = self.iterator.get_next()
loss_t, acc_t, _ = self.predict_keywords(batch)
kw_saver = tf.train.Saver()
loss, acc, _ = self.forward(batch)
retrieval_step = tf.Variable(0, name='retrieval_step')
train_op = tx.core.get_train_op(loss,
global_step=retrieval_step,
hparams=self.config.opt_hparams)
max_val_acc, stopping_flag = 0, 0
with tf.Session(config=self.gpu_config) as sess:
sess.run(tf.tables_initializer())
sess.run(tf.global_variables_initializer())
sess.run(tf.local_variables_initializer())
kw_saver.restore(sess, self.config._kernel_save_path)
saver = tf.train.Saver()
for epoch_id in range(self.config._max_epoch):
self.iterator.switch_to_train_data(sess)
cur_step = 0
cnt_acc, cnt_kwacc = [], []
while True:
try:
cur_step += 1
feed = {tx.global_mode(): tf.estimator.ModeKeys.TRAIN}
loss, acc_, acc_kw = sess.run([train_op, acc, acc_t],
feed_dict=feed)
cnt_acc.append(acc_)
cnt_kwacc.append(acc_kw)
if cur_step % 200 == 0:
print('batch {}, loss={}, acc1={}, kw_acc1={}'.
format(cur_step, loss,
np.mean(cnt_acc[-200:]),
np.mean(cnt_kwacc[-200:])))
except tf.errors.OutOfRangeError:
break
self.iterator.switch_to_val_data(sess)
cnt_acc, cnt_kwacc = [], []
while True:
try:
feed = {tx.global_mode(): tf.estimator.ModeKeys.EVAL}
acc_, acc_kw = sess.run([acc, acc_t], feed_dict=feed)
cnt_acc.append(acc_)
cnt_kwacc.append(acc_kw)
except tf.errors.OutOfRangeError:
mean_acc = np.mean(cnt_acc)
print('valid acc1={}, kw_acc1={}'.format(
mean_acc, np.mean(cnt_kwacc)))
if mean_acc > max_val_acc:
max_val_acc = mean_acc
saver.save(sess, self.config._save_path)
else:
stopping_flag += 1
break
if stopping_flag >= self.config._early_stopping:
break
def _train_epoch(sess, epoch, step, smry_writer):
fetches = {
'step': global_step,
'train_op': train_op,
'smry': summary_merged,
'mle_loss': mle_loss,
'type_cls_loss': type_cls_loss,
'conn_cls_loss': conn_cls_loss,
'total_loss': total_loss,
}
print("------ Epoch number", epoch + 1, "out of", total_epochs, "epochs ------")
for train_batch in range(num_train_batches_in_epoch):
try:
feed_dict = {
iterator.handle: iterator.get_handle(sess, 'train'),
tx.global_mode(): tf.estimator.ModeKeys.TRAIN,
}
op = sess.run([batch], feed_dict)
feed_dict = {
src_input_ids: op[0]['src_input_ids'],
src_segment_ids: op[0]['src_segment_ids'],
tgt_input_ids: op[0]['tgt_input_ids'],
labels: op[0]['tgt_labels'],
type_label: op[0]['type_label'],
conn_label: op[0]['conn_label'],
learning_rate: utils.get_lr(step, lr),
tx.global_mode(): tf.estimator.ModeKeys.TRAIN
}
fetches_ = sess.run(fetches, feed_dict=feed_dict)
step, m_loss, t_loss, c_loss = fetches_['step'], fetches_['mle_loss'], fetches_['type_cls_loss'], \
fetches_['conn_cls_loss']
if step and step % display_steps == 0:
logger.info('batch: %d/%d, mle_loss: %.4f, type_cls_loss: %.4f, conn_cls_loss: %.4f', train_batch,
num_train_batches_in_epoch, m_loss, t_loss, c_loss)
print('batch: %d/%d, mle_loss: %.4f, type_cls_loss: %.4f, conn_cls_loss: %.4f' % (train_batch+1,
num_train_batches_in_epoch,
m_loss, t_loss, c_loss))
smry_writer.add_summary(fetches_['smry'], global_step=step)
except tf.errors.OutOfRangeError:
break
model_path = model_dir + "/model_" + str(step) + ".ckpt"
logger.info('saving model to %s', model_path)
print('saving model to %s' % model_path)
saver.save(sess, model_path)
print("---EVAL---")
_eval_epoch(sess, epoch, mode='eval')
return step
def train(self):
batch = self.iterator.get_next()
kw_loss, kw_acc, _ = self.predict_keywords(batch)
kw_saver = tf.train.Saver()
loss, acc, rank = self.forward_response_retrieval(batch)
op_step = tf.Variable(0, name='retrieval_step')
train_op = tx.core.get_train_op(
loss,
global_step=op_step,
hparams=self.model_config._retrieval_opt_hparams)
max_val_acc = 0.
with tf.Session(config=self.gpu_config) as sess:
sess.run(tf.tables_initializer())
sess.run(tf.global_variables_initializer())
sess.run(tf.local_variables_initializer())
kw_saver.restore(sess, self.model_config._kp_save_path)
saver = tf.train.Saver()
for epoch_id in range(self.model_config._max_epoch):
self.iterator.switch_to_train_data(sess)
cur_step = 0
cnt_acc = []
while True:
try:
cur_step += 1
feed = {tx.global_mode(): tf.estimator.ModeKeys.TRAIN}
loss, acc_ = sess.run([train_op, acc], feed_dict=feed)
cnt_acc.append(acc_)
if cur_step % 200 == 0:
logs_loss_acc = 'batch {}, loss={}, acc1={}'.format(
cur_step, loss, np.mean(cnt_acc[-200:]))
add_log(self.logs_save_path, logs_loss_acc)
except tf.errors.OutOfRangeError:
break
self.iterator.switch_to_val_data(sess)
cnt_acc, cnt_kwacc = [], []
while True:
try:
feed = {tx.global_mode(): tf.estimator.ModeKeys.EVAL}
acc_, kw_acc_ = sess.run([acc, kw_acc], feed_dict=feed)
cnt_acc.append(acc_)
cnt_kwacc.append(kw_acc_)
except tf.errors.OutOfRangeError:
mean_acc = np.mean(cnt_acc)
logs_loss_acc = 'epoch_id {}, valid acc1={}, kw_acc1={}'.format(
epoch_id + 1, mean_acc, np.mean(cnt_kwacc))
add_log(self.logs_save_path, logs_loss_acc)
if mean_acc > max_val_acc:
max_val_acc = mean_acc
saver.save(sess,
self.model_config._retrieval_save_path)
break
def train_keywords(self):
batch = self.iterator.get_next()
acc = self.predict_keywords(batch)
with tf.Session(config=self.gpu_config) as sess:
sess.run(tf.global_variables_initializer())
sess.run(tf.local_variables_initializer())
sess.run(tf.tables_initializer())
self.iterator.switch_to_train_data(sess)
batchid = 0
while True:
try:
batchid += 1
if batchid % 200 == 0:
print(batchid)
feed = {tx.global_mode(): tf.estimator.ModeKeys.TRAIN}
source_keywords, target_keywords = sess.run([
batch['context_text_ids'], batch['keywords_text_ids']
],
feed_dict=feed)
for i in range(len(source_keywords)):
for skw_id in source_keywords[i]:
if skw_id == 0:
break
for tkw_id in target_keywords[i]:
if skw_id >= 3 and tkw_id >= 3:
tkw = self.config._vocab[tkw_id - 4]
if tkw in self.data_config._keywords_candi:
tkw_id = self.data_config._keywords_dict[
tkw]
self.pmi_matrix[skw_id][tkw_id] += 1
except tf.errors.OutOfRangeError:
break
self.pmi_matrix += 0.5
self.pmi_matrix = self.pmi_matrix / (
np.sum(self.pmi_matrix, axis=0) + 1)
with open(self.config._matrix_save_path, 'wb') as f:
pickle.dump(self.pmi_matrix, f)
self.pmi_matrix = tf.convert_to_tensor(self.pmi_matrix,
dtype=tf.float32)
self.iterator.switch_to_val_data(sess)
cnt_acc = []
while True:
try:
feed = {tx.global_mode(): tf.estimator.ModeKeys.EVAL}
acc_ = sess.run(acc, feed_dict=feed)
cnt_acc.append(acc_)
except tf.errors.OutOfRangeError:
print('valid acc1={}'.format(np.mean(cnt_acc)))
break
def _dev_epoch(sess):
"""Evaluates on the dev set.
"""
iterator.restart_dataset(sess, 'dev')
results = tx.utils.AverageRecorder()
nsamples = 0
fetches = {}
fetches.update(loss_dict)
# i = 0
while True:
try:
# (1) Get data and yy sample
fetches_data = {
'batch': batch,
'batch_size': batch_size,
}
feed_dict_data = {
iterator.handle: iterator.get_handle(sess, 'dev'),
tx.global_mode(): tf.estimator.ModeKeys.PREDICT,
}
rets_data = sess.run(fetches_data, feed_dict_data)
# (2) eval loss
feed_dict = {
#x1_ids: rets_data['batch']['x1_ids'],
x1_len: rets_data['batch']['x1_len'],
x1x4_ids: rets_data['batch']['x1x4_ids'],
x1x4_len: rets_data['batch']['x1x4_len'],
tau: config_train.tau,
tx.global_mode(): tf.estimator.ModeKeys.PREDICT,
}
rets = sess.run(fetches, feed_dict)
results.add(rets, weight=rets_data['batch_size'])
nsamples += rets_data['batch_size']
except tf.errors.OutOfRangeError:
break
_log_losses(results.avg())
_log('nsamples: %d' % nsamples)
avg_loss = results.avg('loss')
if FLAGS.do_train and avg_loss < dev_best['loss']:
dev_best.update(results.avg())
ckpt_fn = os.path.join(output_dir, 'model_best.ckpt')
ckpt_fn = saver_best.save(sess, ckpt_fn)
_log('Checkpoint best to {}'.format(ckpt_fn))
def train_keywords(self):
batch = self.iterator.get_next()
loss, acc = self.predict_keywords(batch)
op_step = tf.Variable(0, name='op_step')
train_op = tx.core.get_train_op(loss,
global_step=op_step,
hparams=self.config.kernel_opt_hparams)
max_val_acc, stopping_flag = 0, 0
self.saver = tf.train.Saver()
with tf.Session(config=self.gpu_config) as sess:
sess.run(tf.global_variables_initializer())
sess.run(tf.local_variables_initializer())
sess.run(tf.tables_initializer())
for epoch_id in range(self.config._max_epoch):
self.iterator.switch_to_train_data(sess)
cur_step = 0
cnt_acc = []
while True:
try:
cur_step += 1
feed = {tx.global_mode(): tf.estimator.ModeKeys.TRAIN}
loss_, acc_ = sess.run([train_op, acc], feed_dict=feed)
cnt_acc.append(acc_)
if cur_step % 100 == 0:
print('batch {}, loss={}, acc1={}'.format(
cur_step, loss_, np.mean(cnt_acc[-100:])))
except tf.errors.OutOfRangeError:
break
self.iterator.switch_to_val_data(sess)
cnt_acc = []
while True:
try:
feed = {tx.global_mode(): tf.estimator.ModeKeys.EVAL}
acc_ = sess.run(acc, feed_dict=feed)
cnt_acc.append(acc_)
except tf.errors.OutOfRangeError:
mean_acc = np.mean(cnt_acc)
if mean_acc > max_val_acc:
max_val_acc = mean_acc
self.saver.save(sess,
self.config._kernel_save_path)
else:
stopping_flag += 1
print('epoch_id {}, valid acc1={}'.format(
epoch_id + 1, mean_acc))
break
if stopping_flag >= self.config._early_stopping:
break
def _train_epoch(sess, epoch, step, smry_writer):
fetches = {
'step': global_step,
'train_op': train_op,
'smry': summary_merged,
'loss': mle_loss,
}
while True:
try:
feed_dict = {
iterator.handle: iterator.get_handle(sess, 'train'),
tx.global_mode(): tf.estimator.ModeKeys.TRAIN,
}
op = sess.run([batch], feed_dict)
feed_dict = {
src_input_ids: op[0]['src_input_ids'],
src_segment_ids: op[0]['src_segment_ids'],
tgt_input_ids: op[0]['tgt_input_ids'],
labels: op[0]['tgt_labels'],
learning_rate: utils.get_lr(step, lr),
tx.global_mode(): tf.estimator.ModeKeys.TRAIN
}
fetches_ = sess.run(fetches, feed_dict=feed_dict)
step, loss = fetches_['step'], fetches_['loss']
if step and step % display_steps == 0:
logger.info('step: %d, loss: %.4f', step, loss)
print('step: %d, loss: %.4f' % (step, loss))
smry_writer.add_summary(fetches_['smry'], global_step=step)
if step and step % checkpoint_steps == 0:
model_path = model_dir + "/model_" + str(step) + ".ckpt"
logger.info('saving model to %s', model_path)
print('saving model to %s' % model_path)
saver.save(sess, model_path)
if step > 40000 and step % eval_steps == 0:
_eval_epoch(sess, epoch, mode='eval')
if step and step <= 40000 and step % (test_steps * 2) == 0:
_eval_epoch(sess, epoch, mode='test')
if step > 40000 and step % test_steps == 0:
_eval_epoch(sess, epoch, mode='test')
except tf.errors.OutOfRangeError:
break
return step
def _train_epoch(sess):
"""Trains on the training set, and evaluates on the dev set
periodically.
"""
iterator.restart_dataset(sess, 'train')
fetches = {'loss': train_op, 'step': global_step}
while True:
try:
feed_dict = {
iterator.handle: iterator.get_handle(sess, 'train'),
tx.global_mode(): tf.estimator.ModeKeys.TRAIN,
}
rets = sess.run(fetches, feed_dict)
step = rets['step']
dis_steps = config_train.display_steps
if _is_head() and dis_steps > 0 and step % dis_steps == 0:
tf.logging.info('step:%d; loss:%f' % (step, rets['loss']))
eval_steps = config_train.eval_steps
if _is_head() and eval_steps > 0 and step % eval_steps == 0:
_dev_epoch(sess)
ckpt_steps = config_train.checkpoint_steps
if _is_head() and ckpt_steps > 0 and step % ckpt_steps == 0:
ckpt_fn = os.path.join(FLAGS.output_dir, 'model.ckpt')
ckpt_fn = saver.save(sess, ckpt_fn, global_step=step)
tf.logging.info('Checkpoint to {}'.format(ckpt_fn))
except tf.errors.OutOfRangeError:
break
def _run(sess, mode):
fetches = {
'accu': accu,
'batch_size': batch_size,
'step': global_step,
'loss': loss,
}
if mode == 'train':
fetches['train_op'] = train_op
while True:
try:
feed_dict = {
iterator.handle: iterator.get_handle(sess, 'train'),
tx.global_mode(): tf.estimator.ModeKeys.TRAIN,
}
rets = sess.run(fetches, feed_dict)
if rets['step'] % 50 == 0:
tf.logging.info('step:%d loss:%f' %
(rets['step'], rets['loss']))
if rets['step'] == num_train_steps:
break
except tf.errors.OutOfRangeError:
break
if mode == 'eval':
cum_acc = 0.0
nsamples = 0
while True:
try:
feed_dict = {
iterator.handle: iterator.get_handle(sess, 'eval'),
tx.context.global_mode(): tf.estimator.ModeKeys.EVAL,
}
rets = sess.run(fetches, feed_dict)
cum_acc += rets['accu'] * rets['batch_size']
nsamples += rets['batch_size']
except tf.errors.OutOfRangeError:
break
tf.logging.info('dev accu: {}'.format(cum_acc / nsamples))
if mode == 'test':
_all_preds = []
while True:
try:
feed_dict = {
iterator.handle: iterator.get_handle(sess, 'test'),
tx.context.global_mode():
tf.estimator.ModeKeys.PREDICT,
}
_preds = sess.run(preds, feed_dict=feed_dict)
_all_preds.extend(_preds.tolist())
except tf.errors.OutOfRangeError:
break
output_file = os.path.join(FLAGS.output_dir, "test_results.tsv")
with tf.gfile.GFile(output_file, "w") as writer:
writer.write('\n'.join(str(p) for p in _all_preds))
def _train_qnet(self, feed_dict):
minibatch = self._replay_memory.get(self._sample_batch_size)
observ_batch = np.array([data['observ'] for data in minibatch])
action_batch = np.array([data['action'] for data in minibatch])
reward_batch = np.array([data['reward'] for data in minibatch])
terminal_batch = np.array([data['terminal'] for data in minibatch])
next_observ_batch = \
np.array([data['next_observ'] for data in minibatch])
target_qvalue = self._sess.run(self._target_outputs['qvalues'],
feed_dict={
self._observ_inputs:
next_observ_batch,
tx.global_mode():
tf.estimator.ModeKeys.PREDICT
})
y_batch = reward_batch
for i in range(self._sample_batch_size):
if not terminal_batch[i]:
y_batch[i] += self._discount_factor * np.max(target_qvalue[i])
feed_dict_ = {
self._observ_inputs: observ_batch,
self._y_inputs: y_batch,
self._action_inputs: action_batch
}
feed_dict_.update(feed_dict or {})
self._sess.run(self._train_op, feed_dict=feed_dict_)
self._update_target(feed_dict)
def _eval_epoch(sess, mode):
"""`mode` is one of {'val', 'test'}
"""
iterator.restart_dataset(sess, mode)
refs, hypos = [], []
while True:
try:
fetches = [
batch['target_text'][:, 1:],
infer_outputs.predicted_ids[:, :, 0]
]
feed_dict = {
tx.global_mode(): tf.estimator.ModeKeys.PREDICT,
iterator.handle: iterator.get_handle(sess, mode)
}
target_texts, output_ids = \
sess.run(fetches, feed_dict=feed_dict)
target_texts = tx.utils.strip_special_tokens(target_texts)
output_texts = tx.utils.map_ids_to_strs(
ids=output_ids, vocab=val_data.target_vocab)
for hypo, ref in zip(output_texts, target_texts):
hypos.append(hypo)
refs.append([ref])
except tf.errors.OutOfRangeError:
break
return tx.evals.corpus_bleu_moses(list_of_references=refs,
hypotheses=hypos)
def _qvalues_from_target(self, observ):
return self._sess.run(self._target_outputs['qvalues'],
feed_dict={
self._observ_inputs: np.array([observ]),
tx.global_mode():
tf.estimator.ModeKeys.PREDICT
})
def _train_epoch(sess, summary_writer, mode, train_op, summary_op,
mle_outputs):
print('in _train_epoch')
data_iterator.restart_dataset(sess, mode)
feed_dict = {
tx.global_mode(): tf.estimator.ModeKeys.TRAIN,
data_iterator.handle: data_iterator.get_handle(sess, mode),
}
cnt = 0
while True:
try:
loss, summary, tf_outputs, ground_truth, _gamma = \
sess.run((train_op, summary_op, mle_outputs, tgt_y_ids, gamma), feed_dict)
step = tf.train.global_step(sess, global_step)
print('step {:d}: loss = {:.6f} gamma = {:.4f}'.format(
step, loss, _gamma))
summary_writer.add_summary(summary, step)
# if step % config_train.steps_per_eval == 0:
# _eval_epoch(sess, summary_writer, 'val')
# # _eval_epoch(sess, summary_writer, 'test')
# if step > 921 and (step % 100 == 0):
# _eval_epoch(sess, summary_writer, 'val')
except tf.errors.OutOfRangeError:
break
print('end _train_epoch')
def _run_epoch(sess, data_iter, epoch, is_train=False):
loss = 0.
iters = 0
fetches = {"mle_loss": mle_loss}
if is_train:
fetches["train_op"] = train_op
mode = (tf.estimator.ModeKeys.TRAIN
if is_train else tf.estimator.ModeKeys.EVAL)
for _, (x, y) in enumerate(data_iter):
batch_size = x.shape[0]
feed_dict = {
inputs: x,
targets: y,
learning_rate: lr,
tx.global_mode(): mode,
}
rets = sess.run(fetches, feed_dict)
loss += rets["mle_loss"]
iters += batch_size
ppl = np.exp(loss / iters)
return ppl
def _get_align(sess, mode):
print('in _get_align')
data_iterator.restart_dataset(sess, mode)
feed_dict = {
tx.global_mode(): tf.estimator.ModeKeys.EVAL,
data_iterator.handle: data_iterator.get_handle(sess, mode),
}
with open('align.pkl', 'wb') as out_file:
while True:
try:
batch = sess.run(data_batch, feed_dict)
sd_texts, sent_texts = (
[batch['{}{}_text'.format(field, ref_strs[1])]
for field in fields]
for fields in (sd_fields, sent_fields))
aligns = batch_get_align(*(sd_texts + sent_texts))
sd_texts, sent_texts = (
[batch_strip_special_tokens_of_list(texts)
for texts, field in zip(all_texts, fields)]
for all_texts, fields in zip(
(sd_texts, sent_texts), (sd_fields, sent_fields)))
if FLAGS.verbose:
batch_print_align(*(sd_texts + sent_texts + [aligns]))
for align in aligns:
pickle.dump(align, out_file)
except tf.errors.OutOfRangeError:
break
print('end _get_align')
def _train_epoch(sess):
"""Trains on the training set, and evaluates on the dev set
periodically.
"""
iterator.restart_dataset(sess, 'train')
fetches = {
'train_op': train_op,
'loss': loss,
'batch_size': batch_size,
'step': global_step
}
while True:
try:
feed_dict = {
iterator.handle: iterator.get_handle(sess, 'train'),
tx.global_mode(): tf.estimator.ModeKeys.TRAIN,
}
rets = sess.run(fetches, feed_dict)
step = rets['step']
dis_steps = config_data.display_steps
if _is_head() and dis_steps > 0 and step % dis_steps == 0:
tf.logging.info('step:%d; loss:%f;' % (step, rets['loss']))
eval_steps = config_data.eval_steps
if _is_head() and eval_steps > 0 and step % eval_steps == 0:
_eval_epoch(sess)
except tf.errors.OutOfRangeError:
break
def test(self):
batch = self.iterator.get_next()
loss, acc, rank = self.forward(batch)
with tf.Session(config=self.gpu_config) as sess:
sess.run(tf.tables_initializer())
self.saver = tf.train.Saver()
self.saver.restore(sess, self.config._save_path)
self.iterator.switch_to_test_data(sess)
rank_cnt = []
while True:
try:
feed = {tx.global_mode(): tf.estimator.ModeKeys.PREDICT}
ranks, labels = sess.run([rank, batch['label']],
feed_dict=feed)
for i in range(len(ranks)):
rank_cnt.append(np.where(ranks[i] == labels[i])[0][0])
except tf.errors.OutOfRangeError:
rec = [0, 0, 0, 0, 0]
MRR = 0
for rank in rank_cnt:
for i in range(5):
rec[i] += (rank <= i)
MRR += 1 / (rank + 1)
print(
'test rec1@20={:.4f}, rec3@20={:.4f}, rec5@20={:.4f}, MRR={:.4f}'
.format(rec[0] / len(rank_cnt), rec[2] / len(rank_cnt),
rec[4] / len(rank_cnt), MRR / len(rank_cnt)))
break
def _train_epoch(sess, summary_writer, mode, train_ops, summary_ops,
names):
print('in _train_epoch')
data_iterator.restart_dataset(sess, mode)
feed_dict = {
tx.global_mode(): tf.estimator.ModeKeys.TRAIN,
data_iterator.handle: data_iterator.get_handle(sess, mode),
}
while True:
try:
losses, summaries = sess.run((train_ops, summary_ops),
feed_dict)
step = tf.train.global_step(sess, global_step)
print('step {:d}:\t{}'.format(
step, '\t'.join('{}: {:.6f}'.format(name, losses[name])
for name in names)))
for summary in summaries.values():
summary_writer.add_summary(summary, step)
if step % config_train.steps_per_eval == 0:
_eval_epoch(sess, summary_writer, 'val')
except tf.errors.OutOfRangeError:
break
print('end _train_epoch')
def train_epoch(self, sess, summary_writer, mode, train_op, summary_op):
print("in _train_epoch")
self.data_iterator.restart_dataset(sess, mode)
feed_dict = {
tx.global_mode(): tf.estimator.ModeKeys.TRAIN,
self.data_iterator.handle:
self.data_iterator.get_handle(sess, mode),
}
while True:
try:
loss, summary = sess.run((train_op, summary_op), feed_dict)
step = tf.train.global_step(sess, self.global_step)
print("step {:d}: loss = {:.6f}".format(step, loss))
summary_writer.add_summary(summary, step)
# if step % config_train.steps_per_eval == 0:
# _eval_epoch(sess, summary_writer, 'val')
except tf.errors.OutOfRangeError:
break
print("end _train_epoch")
def test_keywords(self):
batch = self.iterator.get_next()
loss, acc, kws = self.predict_keywords(batch)
saver = tf.train.Saver()
with tf.Session(config=self.gpu_config) as sess:
sess.run(tf.global_variables_initializer())
sess.run(tf.local_variables_initializer())
sess.run(tf.tables_initializer())
saver.restore(sess, self.config._neural_save_path)
self.iterator.switch_to_test_data(sess)
cnt_acc, cnt_rec1, cnt_rec3, cnt_rec5 = [], [], [], []
while True:
try:
feed = {tx.global_mode(): tf.estimator.ModeKeys.PREDICT}
acc_, kw_ans, kw_labels = sess.run(
[acc, kws, batch['keywords_text_ids']], feed_dict=feed)
cnt_acc.append(acc_)
rec = [0, 0, 0, 0, 0]
sum_kws = 0
for i in range(len(kw_ans)):
sum_kws += sum(kw_labels[i] > 3)
for j in range(5):
if kw_ans[i][j] in kw_labels[i]:
for k in range(j, 5):
rec[k] += 1
cnt_rec1.append(rec[0] / sum_kws)
cnt_rec3.append(rec[2] / sum_kws)
cnt_rec5.append(rec[4] / sum_kws)
except tf.errors.OutOfRangeError:
print(
'test_kw acc@1={:.4f}, rec@1={:.4f}, rec@3={:.4f}, rec@5={:.4f}'
.format(np.mean(cnt_acc), np.mean(cnt_rec1),
np.mean(cnt_rec3), np.mean(cnt_rec5)))
break
def _eval_epoch(sess, mode):
if mode == 'val':
data_iterator.switch_to_val_data(sess)
else:
data_iterator.switch_to_test_data(sess)
refs, hypos = [], []
while True:
try:
fetches = [
batch['target_text'][:, 1:],
infer_outputs.predicted_ids[:, :, 0]
]
feed_dict = {
tx.global_mode(): tf.estimator.ModeKeys.EVAL
}
target_texts_ori, output_ids = \
sess.run(fetches, feed_dict=feed_dict)
target_texts = tx.utils.strip_special_tokens(target_texts_ori)
output_texts = tx.utils.map_ids_to_strs(
ids=output_ids, vocab=val_data.target_vocab)
for hypo, ref in zip(output_texts, target_texts):
hypos.append(hypo)
refs.append([ref])
except tf.errors.OutOfRangeError:
break
return tx.evals.corpus_bleu_moses(list_of_references=refs,
hypotheses=hypos)
def _eval(sess, epoch, data_tag):
fetches = {
"predicts": predicts,
}
mode = tf.estimator.ModeKeys.EVAL
file_name = 'tmp/%s%d' % (data_tag, epoch)
writer = CoNLLWriter(i2w, i2n)
writer.start(file_name)
data = data_dev if data_tag == 'dev' else data_test
for batch in iterate_batch(data, config.batch_size, shuffle=False):
word, char, ner, mask, length = batch
feed_dict = {
inputs: word,
chars: char,
targets: ner,
masks: mask,
seq_lengths: length,
global_step: epoch,
tx.global_mode(): mode,
}
rets = sess.run(fetches, feed_dict)
predictions = rets['predicts']
writer.write(word, predictions, ner, length)
writer.close()
acc, precision, recall, f1 = scores.scores(file_name)
print('%s acc: %.2f%%, precision: %.2f%%, recall: %.2f%%, F1: %.2f%%' %
(data_tag, acc, precision, recall, f1))
return acc, precision, recall, f1
def retrieve_init(self, sess):
data_batch = self.iterator.get_next()
loss, acc, _ = self.forward(data_batch)
self.corpus = self.data_config._corpus
self.corpus_data = tx.data.MonoTextData(self.data_config.corpus_hparams)
corpus_iterator = tx.data.DataIterator(self.corpus_data)
batch = corpus_iterator.get_next()
corpus_embed = self.embedder(batch['corpus_text_ids'])
utter_code = self.target_encoder(corpus_embed, sequence_length=batch['corpus_length'])[1]
self.corpus_code = np.zeros([0, self.config._code_len])
corpus_iterator.switch_to_dataset(sess)
sess.run(tf.tables_initializer())
saver = tf.train.Saver()
saver.restore(sess, self.config._save_path)
feed = {tx.global_mode(): tf.estimator.ModeKeys.PREDICT}
while True:
try:
utter_code_ = sess.run(utter_code, feed_dict=feed)
self.corpus_code = np.concatenate([self.corpus_code, utter_code_], axis=0)
except tf.errors.OutOfRangeError:
break
self.minor_length_input = tf.placeholder(dtype=tf.int32, shape=(1, 9))
self.major_length_input = tf.placeholder(dtype=tf.int32, shape=(1))
self.history_input = tf.placeholder(dtype=object, shape=(9, self.data_config._max_seq_len + 2))
history_ids = self.vocab.map_tokens_to_ids(self.history_input)
history_embed = self.embedder(history_ids)
history_code = self.source_encoder(tf.expand_dims(history_embed, axis=0),
sequence_length_minor=self.minor_length_input,
sequence_length_major=self.major_length_input)[1]
select_corpus = tf.cast(self.corpus_code, dtype=tf.float32)
feature_code = self.linear_matcher(select_corpus * history_code)
self.ans_output = tf.nn.top_k(tf.squeeze(feature_code, 1), k=self.data_config._retrieval_candidates)[1]
def _eval_epoch(sess, mode):
if mode == 'valid':
data_iterator.switch_to_val_data(sess)
else:
data_iterator.switch_to_test_data(sess)
refs, hypos = [], []
i = 0
while True:
try:
fetches = [
data_batch['target_text_ids'][:, 1:],
infer_outputs.predicted_ids[:, :, 0]
]
feed_dict = {tx.global_mode(): tf.estimator.ModeKeys.PREDICT}
target_ids, output_ids = sess.run(fetches, feed_dict=feed_dict)
target_texts = tx.utils.map_ids_to_strs(
ids=target_ids, vocab=valid_data.target_vocab)
output_texts = tx.utils.map_ids_to_strs(
ids=output_ids, vocab=valid_data.target_vocab)
if i == 0:
print('Target and Output texts')
print(target_texts)
print(output_texts)
i += 1
for hypo, ref in zip(output_texts, target_texts):
hypos.append(hypo)
refs.append([ref])
except tf.errors.OutOfRangeError:
break
return tx.evals.corpus_bleu(list_of_references=refs, hypotheses=hypos)
def _test_epochs_bleu(sess, epoch):
iterator.switch_to_test_data(sess)
bleu_prec = [[] for i in range(1, 5)]
bleu_recall = [[] for i in range(1, 5)]
def bleus(ref, sample):
res = []
for weight in [[1, 0, 0, 0],
[1, 0, 0, 0],
[0, 1, 0, 0],
[0, 0, 1, 0],
[0, 0, 0, 1]]:
res.append(sentence_bleu([ref], sample,
smoothing_function=SmoothingFunction().method7,
weights=weight))
return res
while True:
try:
feed = {tx.global_mode(): tf.estimator.ModeKeys.EVAL}
beam_samples, beam_length, references, refs_cnt = \
sess.run([beam_sample_text, beam_lengths,
data_batch['refs_text'][:, :, 1:],
data_batch['refs_utterance_cnt']],
feed_dict=feed)
beam_samples = np.transpose(beam_samples, (0, 2, 1))
beam_samples = [[sample[:l] for sample, l in zip(beam, lens)]
for beam, lens in zip(beam_samples.tolist(), beam_length)]
references = [[ref[:ref.index(b'<EOS>')] for ref in refs[:cnt]]
for refs, cnt in zip(references.tolist(), refs_cnt)]
for beam, refs in zip(beam_samples, references):
bleu_scores = np.array([[bleus(ref, sample)
for i, ref in enumerate(refs)]
for j, sample in enumerate(beam)])
bleu_scores = np.transpose(bleu_scores, (2, 0, 1))
for i in range(1, 5):
bleu_i = bleu_scores[i]
bleu_i_precision = bleu_i.max(axis=1).mean()
bleu_i_recall = bleu_i.max(axis=0).mean()
bleu_prec[i-1].append(bleu_i_precision)
bleu_recall[i-1].append(bleu_i_recall)
except tf.errors.OutOfRangeError:
break
bleu_prec = [np.mean(x) for x in bleu_prec]
bleu_recall = [np.mean(x) for x in bleu_recall]
print('epoch {}:'.format(epoch))
for i in range(1, 5):
print(' -- bleu-{} prec={}, recall={}'.format(
i, bleu_prec[i-1], bleu_recall[i-1]))
def _train_epoch(sess, epoch, step, smry_writer):
fetches = {
'step': global_step,
'train_op': train_op,
'smry': summary_merged,
'loss': mle_loss,
}
while True:
try:
feed_dict = {
iterator.handle: iterator.get_handle(sess, 'train'),
tx.global_mode(): tf.estimator.ModeKeys.TRAIN,
}
op = sess.run([batch], feed_dict)
feed_dict = {
src_input_ids: op[0]['src_input_ids'],
src_segment_ids: op[0]['src_segment_ids'],
tgt_input_ids: op[0]['tgt_input_ids'],
labels: op[0]['tgt_labels'],
learning_rate: utils.get_lr(step, lr),
tx.global_mode(): tf.estimator.ModeKeys.TRAIN
}
fetches_ = sess.run(fetches, feed_dict=feed_dict)
step, loss = fetches_['step'], fetches_['loss']
display_steps = 100
if step and step % display_steps == 0:
# with open(os.path.join('/var/scratch/vro220','modeltime_check_loss.txt'),'a')as file_obj:
# print(step,loss,file=file_obj)
#logger.info('step: %d, loss: %.4f', step, loss)
print('step: %d, loss: %.4f' % (step, loss))
smry_writer.add_summary(fetches_['smry'], global_step=step)
if step and step % 1000 == 0:
model_path = "/var/scratch/vro220/models10/model_" + str(
step) + ".ckpt"
print('saving model to %s' % model_path)
saver.save(sess, model_path)
# _eval_epoch(sess, epoch,step,mode='eval')
except tf.errors.OutOfRangeError:
break
return step
def generate(sess, saver, fname=None):
if tf.train.checkpoint_exists(FLAGS.model):
saver.restore(sess, FLAGS.model)
else:
raise ValueError("cannot find checkpoint model")
batch_size = train_data.batch_size
dst = tfd.MultivariateNormalDiag(
loc=tf.zeros([batch_size, config.latent_dims]),
scale_diag=tf.ones([batch_size, config.latent_dims]))
dcdr_states, latent_z = connector_stoch(dst)
# to concatenate latent variable to input word embeddings
def _cat_embedder(ids):
embedding = decoder_embedder(ids)
return tf.concat([embedding, latent_z], axis=1)
vocab = train_data.vocab
start_tokens = tf.ones(batch_size, tf.int32) * vocab.bos_token_id
end_token = vocab.eos_token_id
if config.decoder_hparams["type"] == "lstm":
outputs, _, _ = decoder(initial_state=dcdr_states,
decoding_strategy="infer_sample",
embedding=_cat_embedder,
max_decoding_length=100,
start_tokens=start_tokens,
end_token=end_token)
else:
outputs, _ = decoder(memory=dcdr_states,
decoding_strategy="infer_sample",
memory_sequence_length=tf.ones(
tf.shape(dcdr_states)[0]),
max_decoding_length=100,
start_tokens=start_tokens,
end_token=end_token)
sample_tokens = vocab.map_ids_to_tokens(outputs.sample_id)
sess.run(tf.tables_initializer())
mode_key = tf.estimator.ModeKeys.EVAL
feed = {tx.global_mode(): mode_key}
sample_tokens_ = sess.run(sample_tokens, feed_dict=feed)
if fname is None:
fh = sys.stdout
else:
fh = open(fname, 'w', encoding='utf-8')
for sent in sample_tokens_:
sent = list(sent)
end_id = sent.index(vocab.eos_token)
fh.write(' '.join(sent[:end_id + 1]) + '\n')
fh.close()
