def learning(cls, total_epoch, n_train, n_valid, n_test, batch_size, left_gram, right_gram, model_file, features_vector, labels_vector, n_hidden1=100,
learning_rate=0.01, early_stop_cost=0.001):
ngram = left_gram + right_gram
n_features = len(features_vector) * ngram # number of features = 17,380 * 4
n_classes = len(labels_vector) if len(labels_vector) >= 3 else 1 # number of classes = 2 but len=1
log.info('load characters list...')
log.info('load characters list OK. len: %s\n' % NumUtil.comma_str(len(features_vector)))
watch = WatchUtil()
train_file = os.path.join(KO_WIKIPEDIA_ORG_DIR, 'datasets', 'word_spacing',
'ko.wikipedia.org.dataset.sentences=%s.left=%d.right=%d.train.gz' % (n_train, left_gram, right_gram))
valid_file = os.path.join(KO_WIKIPEDIA_ORG_DIR, 'datasets', 'word_spacing',
'ko.wikipedia.org.dataset.sentences=%s.left=%d.right=%d.test.gz' % (n_valid, left_gram, right_gram))
test_file = os.path.join(KO_WIKIPEDIA_ORG_DIR, 'datasets', 'word_spacing',
'ko.wikipedia.org.dataset.sentences=%s.left=%d.right=%d.valid.gz' % (n_test, left_gram, right_gram))
if not os.path.exists(train_file) or not os.path.exists(valid_file) or not os.path.exists(test_file):
dataset_dir = os.path.dirname(train_file)
if not os.path.exists(dataset_dir):
os.makedirs(dataset_dir)
watch.start('create dataset')
log.info('create dataset...')
data_files = (('train', KO_WIKIPEDIA_ORG_TRAIN_SENTENCES_FILE, n_train, train_file, False),
('valid', KO_WIKIPEDIA_ORG_VALID_SENTENCES_FILE, n_valid, valid_file, False),
('test', KO_WIKIPEDIA_ORG_TEST_SENTENCES_FILE, n_test, test_file, False))
for name, data_file, total, dataset_file, to_one_hot_vector in data_files:
check_interval = 10000
log.info('check_interval: %s' % check_interval)
log.info('%s %s total: %s' % (name, os.path.basename(data_file), NumUtil.comma_str(total)))
features, labels = [], []
with gzip.open(data_file, 'rt', encoding='utf8') as f:
for i, line in enumerate(f, 1):
if total < i:
break
if i % check_interval == 0:
time.sleep(0.01) # prevent cpu overload
percent = i / total * 100
log.info('create dataset... %.1f%% readed. data len: %s. %s' % (percent, NumUtil.comma_str(len(features)), data_file))
_f, _l = WordSpacing.sentence2features_labels(line.strip(), left_gram=left_gram, right_gram=right_gram)
features.extend(_f)
labels.extend(_l)
dataset = DataSet(features=features, labels=labels, features_vector=features_vector, labels_vector=labels_vector, name=name)
log.info('dataset save... %s' % dataset_file)
dataset.save(dataset_file, gzip_format=True, verbose=True)
log.info('dataset save OK. %s' % dataset_file)
log.info('dataset: %s' % dataset)
log.info('create dataset OK.')
log.info('')
watch.stop('create dataset')
watch.start('dataset load')
log.info('dataset load...')
train = DataSet.load(train_file, gzip_format=True, verbose=True)
if n_train >= int('100,000'.replace(',', '')):
valid = DataSet.load(valid_file, gzip_format=True, verbose=True)
else:
valid = DataSet.load(train_file, gzip_format=True, verbose=True)
log.info('valid.convert_to_one_hot_vector()...')
valid = valid.convert_to_one_hot_vector(verbose=True)
log.info('valid.convert_to_one_hot_vector() OK.')
log.info('train dataset: %s' % train)
log.info('valid dataset: %s' % valid)
log.info('dataset load OK.')
log.info('')
watch.stop('dataset load')
graph = WordSpacing.build_FFNN(n_features, n_classes, n_hidden1, learning_rate, watch)
train_step, X, Y, cost, predicted, accuracy = graph['train_step'], graph['X'], graph['Y'], graph['cost'], graph['predicted'], graph['accuracy']
with tf.Session() as sess:
sess.run(tf.global_variables_initializer())
check_interval = 10 # max(1, min(1000, n_train // 10))
nth_train, nth_input, total_input = 0, 0, total_epoch * train.size
log.info('learn...')
log.info('total: %s' % NumUtil.comma_str(train.size))
watch.start('learn')
valid_cost = sys.float_info.max
for epoch in range(1, total_epoch + 1):
if valid_cost < early_stop_cost:
break
for step, (features_batch, labels_batch) in enumerate(train.next_batch(batch_size=batch_size), 1):
if valid_cost < early_stop_cost:
log.info('valid_cost: %s, early_stop_cost: %s, early stopped.' % (valid_cost, early_stop_cost))
break
nth_train += 1
nth_input += features_batch.shape[0]
sess.run(train_step, feed_dict={X: features_batch, Y: labels_batch})
# if step % check_interval == 1:
percent = nth_input / total_input * 100
valid_cost = sess.run(cost, feed_dict={X: valid.features, Y: valid.labels})
log.info('[epoch=%s][%.1f%%] %s cost: %.4f' % (epoch, percent, valid.name, valid_cost))
watch.stop('learn')
log.info('learn OK.\n')
log.info('model save... %s' % model_file)
watch.start('model save...')
model_dir = os.path.dirname(model_file)
if not os.path.exists(model_dir):
os.makedirs(model_dir)
saver = tf.train.Saver()
saver.save(sess, model_file)
watch.stop('model save...')
log.info('model save OK. %s' % model_file)
log.info('\n')
log.info('batch_size: %s' % batch_size)
log.info(watch.summary())
log.info('\n')
if n_train >= int('100,000'.replace(',', '')):
sentences_file = test_sentences_file
else:
sentences_file = train_sentences_file
with gzip.open(sentences_file, 'rt', encoding='utf8') as f:
for i, line in enumerate(f, 1):
if len(sentences) >= max_test_sentences:
break
s = line.strip()
if s.count(' ') > 0: # sentence must have one or more space.
sentences.append(s)
log.info('len(sentences): %s' % NumUtil.comma_str(len(sentences)))
watch.stop('read sentences')
watch.start('run tensorflow')
accuracies, sims = [], []
with tf.Session() as sess:
graph = WordSpacing.build_FFNN(n_features, n_classes, n_hidden1, learning_rate)
X, Y, predicted, accuracy = graph['X'], graph['Y'], graph['predicted'], graph['accuracy']
saver = tf.train.Saver()
try:
restored = saver.restore(sess, model_file)
except:
log.error('restore failed. model_file: %s' % model_file)
try:
for i, s in enumerate(sentences):
log.info('')
if valid_timer.is_over():
valid_rsme, valid_summary = sess.run([rsme, summary], feed_dict={x: x_test, y: y_test})
valid_writer.add_summary(valid_summary, global_step=epoch)
valid_writer.flush()
if valid_rsme < best_cost:
best_cost = valid_rsme
best_epoch = epoch
saver.save(sess, model_file)
model_file_saved = True
log.info('[epoch: %s] rsme (train/valid): %.1f / %.1f model saved' % (epoch, train_rsme, valid_rsme))
else:
log.info('[epoch: %s] rsme (train/valid): %.1f / %.1f' % (epoch, train_rsme, valid_rsme))
if valid_rsme < early_stop_cost or valid_rsme > max_cost or math.isnan(valid_rsme):
running = False
break
watch.stop('train')
if model_file_saved and os.path.exists(model_file + '.index'):
restored = saver.restore(sess, model_file)
log.info('')
log.info('--------TEST----------')
watch.start('test')
test_rsme, _y_hat = sess.run([rsme, y_hat], feed_dict={x: x_test, y: y_test})
log.info('%s rsme (test): %.1f (epoch best/total: %s/%s), activation: %s, n_hiddens: %s, learning_rate: %s, weights_initializer: %s' % (
func.__name__, test_rsme, NumUtil.comma_str(best_epoch), NumUtil.comma_str(epoch), activation.__name__,
n_hiddens, learning_rate, weights_initializer.__name__))
# _y_hat = np.round(_y_hat)
for i in range(min(5, _y_hat.shape[0])):
def learning(cls, total_epoch, n_train, n_valid, n_test, batch_size, window_size, noise_rate, model_file, features_vector, labels_vector,
n_hidden1,
learning_rate,
dropout_keep_rate, early_stop_cost=0.001):
n_features = len(features_vector) * window_size # number of features = 17,382 * 10
log.info('load characters list...')
log.info('load characters list OK. len: %s' % NumUtil.comma_str(len(features_vector)))
watch = WatchUtil()
train_file = os.path.join(KO_WIKIPEDIA_ORG_DIR, 'datasets', 'spelling_error_correction',
'ko.wikipedia.org.dataset.sentences=%s.window_size=%d.train.gz' % (n_train, window_size))
valid_file = os.path.join(KO_WIKIPEDIA_ORG_DIR, 'datasets', 'spelling_error_correction',
'ko.wikipedia.org.dataset.sentences=%s.window_size=%d.valid.gz' % (n_valid, window_size))
test_file = os.path.join(KO_WIKIPEDIA_ORG_DIR, 'datasets', 'spelling_error_correction',
'ko.wikipedia.org.dataset.sentences=%s.window_size=%d.test.gz' % (n_test, window_size))
log.info('train_file: %s' % train_file)
log.info('valid_file: %s' % valid_file)
log.info('test_file: %s' % test_file)
if not os.path.exists(train_file) or not os.path.exists(valid_file) or not os.path.exists(test_file):
dataset_dir = os.path.dirname(train_file)
if not os.path.exists(dataset_dir):
os.makedirs(dataset_dir)
watch.start('create dataset') # FIXME: out of memory (1M sentences)
log.info('create dataset...')
data_files = (('train', KO_WIKIPEDIA_ORG_TRAIN_SENTENCES_FILE, n_train, train_file, False),
('valid', KO_WIKIPEDIA_ORG_VALID_SENTENCES_FILE, n_valid, valid_file, False),
('test', KO_WIKIPEDIA_ORG_TEST_SENTENCES_FILE, n_test, test_file, False))
for (name, data_file, total, dataset_file, to_one_hot_vector) in data_files:
check_interval = 10000
log.info('check_interval: %s' % check_interval)
log.info('%s %s total: %s' % (name, os.path.basename(data_file), NumUtil.comma_str(total)))
log.info('noise_rate: %s' % noise_rate)
features, labels = [], []
with gzip.open(data_file, 'rt') as f:
for i, line in enumerate(f, 1):
if total < i:
break
if i % check_interval == 0:
time.sleep(0.01) # prevent cpu overload
percent = i / total * 100
log.info('create dataset... %.1f%% readed. data len: %s. %s' % (percent, NumUtil.comma_str(len(features)), data_file))
sentence = line.strip()
for start in range(0, len(sentence) - window_size + 1): # 문자 단위로 노이즈(공백) 생성
chars = sentence[start: start + window_size]
for idx in range(len(chars)):
noised_chars = StringUtil.replace_with_index(chars, ' ', idx)
features.append(noised_chars)
labels.append(chars)
log.debug('create dataset... %s "%s" -> "%s"' % (name, noised_chars, chars))
# log.info('noise_sampling: %s' % noise_sampling)
# for nth_sample in range(noise_sampling): # 초성, 중성, 종성 단위로 노이즈 생성
# for start in range(0, len(sentence) - window_size + 1):
# chars = sentence[start: start + window_size]
# noised_chars = SpellingErrorCorrection.encode_noise(chars, noise_rate=noise_rate, noise_with_blank=True)
# if chars == noised_chars:
# continue
# if i % check_interval == 0 and nth_sample == 0:
# log.info('create dataset... %s "%s" -> "%s"' % (name, noised_chars, chars))
# features.append(noised_chars)
# labels.append(chars)
# print('dataset features:', features)
# print('dataset labels:', labels)
dataset = DataSet(features=features, labels=labels, features_vector=features_vector, labels_vector=labels_vector, name=name)
log.info('dataset save... %s' % dataset_file)
dataset.save(dataset_file, gzip_format=True, verbose=True)
log.info('dataset save OK. %s' % dataset_file)
log.info('dataset: %s' % dataset)
log.info('create dataset OK.')
log.info('')
watch.stop('create dataset')
watch.start('dataset load')
log.info('dataset load...')
train = DataSet.load(train_file, gzip_format=True, verbose=True)
if n_train >= int('100,000'.replace(',', '')):
valid = DataSet.load(valid_file, gzip_format=True, verbose=True)
else:
valid = DataSet.load(train_file, gzip_format=True, verbose=True)
log.info('valid.convert_to_one_hot_vector()...')
valid = valid.convert_to_one_hot_vector(verbose=True)
log.info('valid.convert_to_one_hot_vector() OK.')
log.info('train dataset: %s' % train)
log.info('valid dataset: %s' % valid)
log.info('dataset load OK.')
log.info('')
watch.stop('dataset load')
X, Y, dropout_keep_prob, train_step, cost, y_hat, accuracy = SpellingErrorCorrection.build_DAE(n_features, window_size, noise_rate, n_hidden1,
learning_rate, watch)
with tf.Session() as sess:
sess.run(tf.global_variables_initializer())
check_interval = max(1, min(1000, n_train // 10))
nth_train, nth_input, total_input = 0, 0, total_epoch * train.size
log.info('')
log.info('learn...')
log.info('total_epoch: %s' % total_epoch)
log.info('train.size (total features): %s' % NumUtil.comma_str(train.size))
log.info('check_interval: %s' % check_interval)
log.info('total_epoch: %s' % total_epoch)
log.info('batch_size: %s' % batch_size)
log.info('total_input: %s (total_epoch * train.size)' % total_input)
log.info('')
watch.start('learn')
valid_cost = sys.float_info.max
for epoch in range(1, total_epoch + 1):
if valid_cost < early_stop_cost:
log.info('valid_cost: %s, early_stop_cost: %s, early stopped.' % (valid_cost, early_stop_cost))
break
for step, (features_batch, labels_batch) in enumerate(train.next_batch(batch_size=batch_size, to_one_hot_vector=True), 1):
if valid_cost < early_stop_cost:
break
nth_train += 1
nth_input += features_batch.shape[0]
sess.run(train_step, feed_dict={X: features_batch, Y: labels_batch, dropout_keep_prob: dropout_keep_rate})
# if nth_train % check_interval == 1:
percent = nth_input / total_input * 100
valid_cost = sess.run(cost, feed_dict={X: valid.features, Y: valid.labels, dropout_keep_prob: 1.0})
log.info('[epoch=%s][%.1f%%] %s cost: %.8f' % (epoch, percent, valid.name, valid_cost))
watch.stop('learn')
log.info('learn OK.')
log.info('')
log.info('model save... %s' % model_file)
watch.start('model save...')
model_dir = os.path.dirname(model_file)
if not os.path.exists(model_dir):
os.makedirs(model_dir)
saver = tf.train.Saver()
saver.save(sess, model_file)
watch.stop('model save...')
log.info('model save OK. %s' % model_file)
log.info('')
log.info('total_epoch: %s' % total_epoch)
log.info('batch_size: %s' % batch_size)
log.info('total_input: %s (total_epoch * train.size)' % total_input)
log.info('')
log.info(watch.summary())
log.info('')
def learning(cls,
sentences_file,
batch_size,
left_gram,
right_gram,
model_file,
features_vector,
labels_vector,
n_hidden1=100,
max_sentences=0,
learning_rate=0.01,
layers=2):
ngram = left_gram + right_gram
n_features = len(
features_vector) * ngram # number of features = 17,380 * 4
n_classes = len(labels_vector) if len(
labels_vector) >= 3 else 1 # number of classes = 2 but len=1
log.info('load characters list...')
log.info('load characters list OK. len: %s\n' %
NumUtil.comma_str(len(features_vector)))
watch = WatchUtil()
train_file = os.path.join(
KO_WIKIPEDIA_ORG_DATA_DIR, 'datasets',
'ko.wikipedia.org.dataset.sentences=%d.left=%d.right=%d.train.gz' %
(max_sentences, left_gram, right_gram))
validation_file = train_file.replace('.train.', '.validation.')
test_file = train_file.replace('.train.', '.test.')
if not os.path.exists(train_file) or not os.path.exists(
validation_file) or not os.path.exists(test_file):
watch.start('create dataset')
log.info('create dataset...')
features, labels = [], []
check_interval = min(10000, math.ceil(max_sentences))
log.info('total: %s' % NumUtil.comma_str(max_sentences))
with gzip.open(sentences_file, 'rt') as f:
for i, line in enumerate(f, 1):
if max_sentences < i:
break
if i % check_interval == 0:
log.info(
'create dataset... %.1f%% readed. data len: %s' %
(i / max_sentences * 100,
NumUtil.comma_str(len(features))))
_f, _l = WordSpacing.sentence2features_labels(
line.strip(),
left_gram=left_gram,
right_gram=right_gram)
features.extend(_f)
labels.extend(_l)
dataset = DataSet(features=features,
labels=labels,
features_vector=features_vector,
labels_vector=labels_vector,
name='all')
log.info('dataset: %s' % dataset)
log.info('create dataset OK.\n')
watch.stop('create dataset')
watch.start('dataset save')
log.info('split to train, test, validation...')
datasets = DataSets.to_datasets(dataset,
test_rate=0.1,
valid_rate=0.1,
test_max=10000,
valid_max=1000,
shuffle=True)
train, test, validation = datasets.train, datasets.test, datasets.validation
log.info(train)
log.info(test)
log.info(validation)
# log.info('%s %s' % (test.features[0], test.labels[0]))
log.info('split to train, test, validation OK.\n')
log.info('dataset save... %s' % train_file)
train.save(train_file, verbose=True) # save as text
log.info('dataset save OK.\n')
log.info('dataset save... %s' % validation_file)
validation = validation.convert_to_one_hot_vector(
verbose=True) # save as vector
validation.save(validation_file, verbose=True)
log.info('dataset save OK.\n')
log.info('dataset save... %s' % test_file)
test = test.convert_to_one_hot_vector(verbose=True)
test.save(test_file, verbose=True) # save as vector
log.info('dataset save OK.\n')
watch.stop('dataset save')
else:
watch.start('dataset load')
log.info('dataset load...')
train = DataSet.load(train_file, verbose=True)
validation = DataSet.load(validation_file, verbose=True)
test = DataSet.load(test_file, verbose=True)
log.info(train)
log.info(validation)
log.info(test)
log.info('dataset load OK.\n')
watch.stop('dataset load')
log.info('check samples...')
for i, (features_batch, labels_batch) in enumerate(
train.next_batch(batch_size=5, to_one_hot_vector=True), 1):
if i > 2:
break
for a, b in zip(features_batch, labels_batch):
feature, label = a, b
_feature = feature.reshape((ngram, len(features_vector)))
chars = ''.join(features_vector.to_values(_feature))
has_space = np.argmax(label)
log.info('[%s] %s -> %s, %s (len=%s) %s (len=%s)' %
(i, chars, has_space, feature, len(feature), label,
len(label)))
log.info('check samples OK.\n')
graph = WordSpacing.build_FFNN(n_features,
n_classes,
n_hidden1,
learning_rate,
watch,
layers=layers)
train_step, X, Y, cost, hypothesis, predicted, accuracy = graph[
'train_step'], graph['X'], graph['Y'], graph['cost'], graph[
'hypothesis'], graph['predicted'], graph['accuracy']
with tf.Session() as sess:
sess.run(tf.global_variables_initializer())
n_input = 0
log.info('total: %s' % NumUtil.comma_str(train.size))
log.info('learn...')
watch.start('learn')
for step, (features_batch, labels_batch) in enumerate(
train.next_batch(batch_size=batch_size), 1):
n_input += batch_size
sess.run(train_step,
feed_dict={
X: features_batch,
Y: labels_batch
})
log.info(
'[%s][%.1f%%] validation cost: %.4f' %
(NumUtil.comma_str(n_input), n_input / train.size * 100,
sess.run(cost,
feed_dict={
X: validation.features,
Y: validation.labels
})))
watch.stop('learn')
log.info('learn OK.\n')
log.info('evaluate...')
watch.start('evaluate...')
_hypothesis, _correct, _accuracy = sess.run(
[hypothesis, predicted, accuracy],
feed_dict={
X: test.features,
Y: test.labels
}) # Accuracy report
watch.stop('evaluate...')
log.info('evaluate OK.')
log.info('model save... %s' % model_file)
watch.start('model save...')
model_dir = os.path.dirname(model_file)
if not os.path.exists(model_dir):
os.makedirs(model_dir)
saver = tf.train.Saver()
saver.save(sess, model_file)
watch.stop('model save...')
log.info('model save OK. %s' % model_file)
log.info('\n')
log.info(watch.summary())
# log.info('hypothesis: %s %s' % (_hypothesis.shape, _hypothesis))
# log.info('correct: %s %s' % (_correct.shape, _correct))
log.info('accuracy: %s %s' % (_accuracy.shape, _accuracy))
log.info('\n')