def train(config):
# --------- configurations --------- #
batch_size = config['batch_size']
save_path = config['save'] # path to store model
saved_model = config['load'] # None or path
if not os.path.exists(save_path):
os.makedirs(save_path)
# ---------------------------------- #
write_config(save_path + '/config.txt', config)
# random seed
random.seed(config['random_seed'])
# np.random.seed(config['random_seed'])
batches, vocab_size, src_word2id, tgt_word2id = construct_training_data_batches(
config)
tgt_id2word = list(tgt_word2id.keys())
params = {
'vocab_src_size': vocab_size['src'],
'vocab_tgt_size': vocab_size['tgt'],
'go_id': tgt_word2id['<go>'],
'eos_id': tgt_word2id['</s>']
}
model = EncoderDecoder(config, params)
model.build_network()
learning_rate = config['learning_rate']
decay_rate = config['decay_rate']
tf_variables = tf.trainable_variables()
for i in range(len(tf_variables)):
print(tf_variables[i])
# save & restore model
saver = tf.train.Saver(max_to_keep=1)
if config['use_gpu']:
if 'X_SGE_CUDA_DEVICE' in os.environ:
print('running on the stack...')
cuda_device = os.environ['X_SGE_CUDA_DEVICE']
print('X_SGE_CUDA_DEVICE is set to {}'.format(cuda_device))
os.environ['CUDA_VISIBLE_DEVICES'] = cuda_device
else: # development only e.g. air202
print('running locally...')
os.environ[
'CUDA_VISIBLE_DEVICES'] = '1' # choose the device (GPU) here
sess_config = tf.ConfigProto(allow_soft_placement=True)
sess_config.gpu_options.allow_growth = True # Whether the GPU memory usage can grow dynamically.
sess_config.gpu_options.per_process_gpu_memory_fraction = 0.95 # The fraction of GPU memory that the process can use.
else:
os.environ['CUDA_VISIBLE_DEVICES'] = ''
sess_config = tf.ConfigProto()
with tf.Session(config=sess_config) as sess:
if saved_model == None:
sess.run(tf.global_variables_initializer())
# ------------ load pre-trained embeddings ------------ #
if config['load_embedding_src'] != None:
src_embedding = sess.run(model.src_word_embeddings)
src_embedding_matrix = load_pretrained_embedding(
src_word2id, src_embedding, config['load_embedding_src'])
sess.run(
model.src_word_embeddings.assign(src_embedding_matrix))
if config['load_embedding_tgt'] != None:
if config['load_embedding_tgt'] == config[
'load_embedding_src']:
sess.run(
model.tgt_word_embeddings.assign(src_embedding_matrix))
else:
tgt_embedding = sess.run(model.tgt_word_embeddings)
tgt_embedding_matrix = load_pretrained_embedding(
tgt_word2id, tgt_embedding,
config['load_embedding_tgt'])
sess.run(
model.tgt_word_embeddings.assign(tgt_embedding_matrix))
# ----------------------------------------------------- #
else:
new_saver = tf.train.import_meta_graph(saved_model + '.meta')
new_saver.restore(sess, saved_model)
print('loaded model...', saved_model)
# ------------ TensorBoard ------------ #
# summary_writer = tf.summary.FileWriter(save_path + '/tfboard/', graph_def=sess.graph_def)
# ------------------------------------- #
# ------------ To print out some output -------------------- #
my_sentences = [
'this is test . </s>',
'this is confirm my reservation at hotel . </s>',
'playing tennis good for you . </s>',
'when talking about successful longterm business relationships customer services are important element </s>'
]
my_sent_ids = []
for my_sentence in my_sentences:
ids = []
for word in my_sentence.split():
if word in src_word2id:
ids.append(src_word2id[word])
else:
ids.append(src_word2id['<unk>'])
my_sent_ids.append(ids)
my_sent_len = [len(my_sent) for my_sent in my_sent_ids]
my_sent_ids = [
ids + [src_word2id['</s>']] *
(config['max_sentence_length'] - len(ids)) for ids in my_sent_ids
]
infer_dict = {
model.src_word_ids: my_sent_ids,
model.src_sentence_lengths: my_sent_len,
model.dropout: 0.0,
model.learning_rate: learning_rate
}
# ---------------------------------------------------------- #
num_epochs = config['num_epochs']
for epoch in range(num_epochs):
print("num_batches = ", len(batches))
random.shuffle(batches)
epoch_loss = 0
for i, batch in enumerate(batches):
feed_dict = {
model.src_word_ids: batch['src_word_ids'],
model.tgt_word_ids: batch['tgt_word_ids'],
model.src_sentence_lengths: batch['src_sentence_lengths'],
model.tgt_sentence_lengths: batch['tgt_sentence_lengths'],
model.dropout: config['dropout'],
model.learning_rate: learning_rate
}
[_, loss] = sess.run([model.train_op, model.train_loss],
feed_dict=feed_dict)
epoch_loss += loss
if i % 100 == 0:
# to print out training status
# if config['decoding_method'] != 'beamsearch':
# [train_loss, infer_loss] = sess.run([model.train_loss, model.infer_loss], feed_dict=feed_dict)
# print("batch: {} --- train_loss: {:.5f} | inf_loss: {:.5f}".format(i, train_loss, infer_loss))
# else:
# --- beam search --- #
# [train_loss] = sess.run([model.train_loss], feed_dict=feed_dict)
# print("BEAMSEARCH - batch: {} --- train_loss: {:.5f}".format(i, train_loss))
print("batch: {} --- avg train loss: {:.5f}".format(
i, epoch_loss / (i + 1)))
sys.stdout.flush()
if i % 500 == 0:
[my_translations] = sess.run([model.translations],
feed_dict=infer_dict)
# pdb.set_trace()
for my_sent in my_translations:
my_words = [tgt_id2word[id] for id in my_sent]
print(' '.join(my_words))
model.increment_counter()
learning_rate *= decay_rate
print("---------------------------------------------------")
print("epoch {} done".format(epoch + 1))
print("total training loss = {}".format(epoch_loss))
print("---------------------------------------------------")
if math.isnan(epoch_loss):
print("stop training - loss/gradient exploded")
break
saver.save(sess, save_path + '/model', global_step=epoch)
def adapt(config):
if 'X_SGE_CUDA_DEVICE' in os.environ:
print('running on the stack...')
cuda_device = os.environ['X_SGE_CUDA_DEVICE']
print('X_SGE_CUDA_DEVICE is set to {}'.format(cuda_device))
os.environ['CUDA_VISIBLE_DEVICES'] = cuda_device
else: # development only e.g. air202
print('running locally...')
os.environ[
'CUDA_VISIBLE_DEVICES'] = '3' # choose the device (GPU) here
sess_config = tf.ConfigProto()
batches, vocab_size, src_word2id, tgt_word2id = construct_training_data_batches(
config)
tgt_id2word = list(tgt_word2id.keys())
params = {
'vocab_src_size': len(src_word2id),
'vocab_tgt_size': len(tgt_word2id),
'go_id': tgt_word2id['<go>'],
'eos_id': tgt_word2id['</s>']
}
# build the model
model = EncoderDecoder(config, params)
model.build_network()
# -------- Adaption work -------- #
bias_name = 'decoder/decode_with_shared_attention/decoder/dense/bias:0'
weight_name = 'decoder/decode_with_shared_attention/decoder/dense/kernel:0'
param_names = [bias_name, weight_name]
# param_names = [var.name for var in tf.trainable_variables()]
model.adapt_weights(param_names)
# ------------------------------- #
new_save_path = config['save']
if not os.path.exists(new_save_path):
os.makedirs(new_save_path)
write_config(new_save_path + '/config.txt', config)
# save & restore model
saver = tf.train.Saver(max_to_keep=1)
save_path = config['load']
model_number = config['model_number'] if config[
'model_number'] != None else config['num_epochs'] - 1
full_save_path_to_model = save_path + '/model-' + str(model_number)
with tf.Session(config=sess_config) as sess:
# Restore variables from disk.
saver.restore(sess, full_save_path_to_model)
for epoch in range(10):
print("num_batches = ", len(batches))
random.shuffle(batches)
for i, batch in enumerate(batches):
feed_dict = {
model.src_word_ids: batch['src_word_ids'],
model.tgt_word_ids: batch['tgt_word_ids'],
model.src_sentence_lengths: batch['src_sentence_lengths'],
model.tgt_sentence_lengths: batch['tgt_sentence_lengths'],
model.dropout: config['dropout']
}
_ = sess.run([model.adapt_op], feed_dict=feed_dict)
if i % 100 == 0:
# to print out training status
if config['decoding_method'] != 'beamsearch':
[train_loss, infer_loss
] = sess.run([model.train_loss, model.infer_loss],
feed_dict=feed_dict)
print(
"batch: {} --- train_loss: {:.5f} | inf_loss: {:.5f}"
.format(i, train_loss, infer_loss))
else:
# --- beam search --- #
[train_loss] = sess.run([model.train_loss],
feed_dict=feed_dict)
print("BEAMSEARCH - batch: {} --- train_loss: {:.5f}".
format(i, train_loss))
sys.stdout.flush()
model.increment_counter()
print("################## EPOCH {} done ##################".format(
epoch))
saver.save(sess, new_save_path + '/model', global_step=epoch)
