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main.py
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main.py
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from __future__ import absolute_import
from __future__ import division
from __future__ import print_function
import os
import sys
import argparse
import numpy as np
import tensorflow as tf
from encoder import encoder
from decoder import decoder
import six
import json
import collections
_NUM_SAMPLES = {
'train' : 1000,
'test' : 50,
}
# Basic model parameters.
parser = argparse.ArgumentParser()
parser.add_argument('--mode', type=str, default='train')
parser.add_argument('--data_dir', type=str, default='data')
parser.add_argument('--model_dir', type=str, default='model')
parser.add_argument('--restore', action='store_true', default=False)
parser.add_argument('--encoder_num_layers', type=int, default=1)
parser.add_argument('--encoder_hidden_size', type=int, default=96)
parser.add_argument('--encoder_emb_size', type=int, default=32)
parser.add_argument('--mlp_num_layers', type=int, default=0)
parser.add_argument('--mlp_hidden_size', type=int, default=32)
parser.add_argument('--mlp_dropout', type=float, default=0.5)
parser.add_argument('--decoder_num_layers', type=int, default=1)
parser.add_argument('--decoder_hidden_size', type=int, default=32)
parser.add_argument('--source_length', type=int, default=60)
parser.add_argument('--encoder_length', type=int, default=60)
parser.add_argument('--decoder_length', type=int, default=60)
parser.add_argument('--encoder_dropout', type=float, default=0.0)
parser.add_argument('--decoder_dropout', type=float, default=0.0)
parser.add_argument('--weight_decay', type=float, default=1e-4)
parser.add_argument('--encoder_vocab_size', type=int, default=21)
parser.add_argument('--decoder_vocab_size', type=int, default=21)
parser.add_argument('--trade_off', type=float, default=0.5)
parser.add_argument('--train_epochs', type=int, default=1000)
parser.add_argument('--eval_frequency', type=int, default=10)
parser.add_argument('--batch_size', type=int, default=128)
parser.add_argument('--lr', type=float, default=1.0)
parser.add_argument('--optimizer', type=str, default='adam')
parser.add_argument('--start_decay_step', type=int, default=100)
parser.add_argument('--decay_steps', type=int, default=1000)
parser.add_argument('--decay_factor', type=float, default=0.9)
parser.add_argument('--attention', action='store_true', default=False)
parser.add_argument('--max_gradient_norm', type=float, default=5.0)
parser.add_argument('--beam_width', type=int, default=0)
parser.add_argument('--time_major', action='store_true', default=False)
parser.add_argument('--symmetry', action='store_true', default=False)
parser.add_argument('--predict_from_file', type=str, default=None)
parser.add_argument('--predict_to_file', type=str, default=None)
parser.add_argument('--predict_beam_width', type=int, default=0)
parser.add_argument('--predict_lambda', type=float, default=0.1)
SOS=0
EOS=0
def input_fn(params, mode, data_dir, batch_size, num_epochs=1):
"""Input_fn using the tf.data input pipeline for CIFAR-10 dataset.
Args:
is_training: A boolean denoting whether the input is for training.
data_dir: The directory containing the input data.
batch_size: The number of samples per batch.
num_epochs: The number of epochs to repeat the dataset.
Returns:
A tuple of images and labels.
"""
def get_filenames(mode, data_dir):
"""Returns a list of filenames."""
if mode == 'train':
return [os.path.join(data_dir, 'encoder.train.input'), os.path.join(data_dir, 'encoder.train.target'),
os.path.join(data_dir, 'decoder.train.target')]
else:
return [os.path.join(data_dir, 'encoder.test.input'), os.path.join(data_dir, 'encoder.test.target'),
os.path.join(data_dir, 'decoder.test.target')]
files = get_filenames(mode, data_dir)
encoder_input_dataset = tf.data.TextLineDataset(files[0])
encoder_target_dataset = tf.data.TextLineDataset(files[1])
decoder_target_dataset = tf.data.TextLineDataset(files[2])
dataset = tf.data.Dataset.zip((encoder_input_dataset, encoder_target_dataset, decoder_target_dataset))
is_training = mode == 'train'
if is_training:
dataset = dataset.shuffle(buffer_size=_NUM_SAMPLES['train'])
def decode_record(encoder_src, encoder_tgt, decoder_tgt): #src:sequence tgt:performance
sos_id = tf.constant([SOS])
eos_id = tf.constant([EOS])
encoder_src = tf.string_split([encoder_src]).values
encoder_src = tf.string_to_number(encoder_src, out_type=tf.int32)
encoder_tgt = tf.string_to_number(encoder_tgt, out_type=tf.float32)
decoder_tgt = tf.string_split([decoder_tgt]).values
decoder_tgt = tf.string_to_number(decoder_tgt, out_type=tf.int32)
decoder_src = tf.concat([sos_id ,decoder_tgt[:-1]], axis=0)
return (encoder_src, encoder_tgt, decoder_src, decoder_tgt)
def generate_symmetry(encoder_src, encoder_tgt, decoder_src, decoder_tgt):
a = tf.random_uniform([], 0, 5, dtype=tf.int32)
b = tf.random_uniform([], 0, 5, dtype=tf.int32)
half_length = params['source_length'] // 2
encoder_src = tf.concat([encoder_src[:6*a], encoder_src[6*a+3:6*a+6], encoder_src[6*a:6*a+3], encoder_src[6*(a+1):half_length+6*b],
encoder_src[half_length+6*b+3:half_length+6*b+6], encoder_src[half_length+6*b:half_length+6*b+3], encoder_src[half_length+6*(b+1):]], axis=0)
decoder_tgt = encoder_src
return encoder_src, encoder_tgt, decoder_src, decoder_tgt
dataset = dataset.map(decode_record)
if is_training and params['symmetry']:
dataset = dataset.map(generate_symmetry)
dataset = dataset.repeat(num_epochs)
dataset = dataset.batch(batch_size)
iterator = dataset.make_one_shot_iterator()
batched_examples = iterator.get_next()
encoder_input, encoder_target, decoder_input, decoder_target = batched_examples
assert encoder_input.shape.ndims == 2
assert encoder_target.shape.ndims == 1
while encoder_target.shape.ndims < 2:
encoder_target = tf.expand_dims(encoder_target, axis=-1)
assert decoder_input.shape.ndims == 2
assert decoder_target.shape.ndims == 2
return {
'encoder_input' : encoder_input,
'encoder_target' : encoder_target,
'decoder_input' : decoder_input,
'decoder_target' : decoder_target
}, encoder_target
def create_vocab_tables(vocab_file):
"""Creates vocab tables for src_vocab_file and tgt_vocab_file."""
vocab_table = lookup_ops.index_table_from_file(
vocab_file, default_value=0)
return vocab_table
def predict_from_file(estimator, batch_size, decode_from_file, decode_to_file=None):
def infer_input_fn():
dataset = tf.data.TextLineDataset(decode_from_file)
def decode_record(record):
src = tf.string_split([record]).values
src = tf.string_to_number(src, out_type=tf.int32)
return src, tf.constant([SOS], dtype=tf.int32)
dataset = dataset.map(decode_record)
dataset = dataset.batch(FLAGS.batch_size)
iterator = dataset.make_one_shot_iterator()
inputs, targets_inputs = iterator.get_next()
assert inputs.shape.ndims == 2
#assert targets_inputs.shape.ndims == 2
return {
'encoder_input' : inputs,
'decoder_input' : targets_inputs,
}, None
results = []
new_ids = []
perfs = []
result_iter = estimator.predict(infer_input_fn)
for result in result_iter:
output = result['sample_id'].flatten()
output = ' '.join(map(str, output))
tf.logging.info('Inference results OUTPUT: %s' % output)
results.append(output)
output = result['new_sample_id'].flatten()
output = ' '.join(map(str, output))
new_ids.append(output)
output = result['predict_value'].flatten()
output = ' '.join(map(str, output))
perfs.append(output)
if decode_to_file:
output_filename = decode_to_file
else:
output_filename = '%s.result' % decode_from_file
tf.logging.info('Writing results into {0}'.format(output_filename))
with tf.gfile.Open(output_filename+'.arch', 'w') as f:
for res in results:
f.write('%s\n' % (res))
with tf.gfile.Open(output_filename+'.new_arch', 'w') as f:
for res in new_ids:
f.write('%s\n' % (res))
with tf.gfile.Open(output_filename+'.perf', 'w') as f:
for res in perfs:
f.write('%s\n' % (res))
def model_fn(features, labels, mode, params):
if mode == tf.estimator.ModeKeys.TRAIN:
encoder_input = features['encoder_input']
encoder_target = features['encoder_target']
decoder_input = features['decoder_input']
decoder_target = features['decoder_target']
my_encoder = encoder.Model(encoder_input, encoder_target, params, mode, 'Encoder')
#my_encoder_sym = encoder.Model(encoder_input[:,params['source_length']:], encoder_target, params, mode, 'Encoder', True)
encoder_outputs = my_encoder.encoder_outputs
encoder_state = my_encoder.arch_emb
encoder_state.set_shape([None, params['decoder_hidden_size']])
encoder_state = tf.contrib.rnn.LSTMStateTuple(encoder_state, encoder_state)
encoder_state = (encoder_state,) * params['decoder_num_layers']
my_decoder = decoder.Model(encoder_outputs, encoder_state, decoder_input, decoder_target, params, mode, 'Decoder')
encoder_loss = my_encoder.loss
decoder_loss = my_decoder.loss
total_loss = params['trade_off'] * encoder_loss + (1 - params['trade_off']) * decoder_loss + params['weight_decay'] * tf.add_n(
[tf.nn.l2_loss(v) for v in tf.trainable_variables()])
global_step = tf.train.get_or_create_global_step()
learning_rate = tf.constant(params['lr'])
if params['optimizer'] == "sgd":
learning_rate = tf.cond(
global_step < params['start_decay_step'],
lambda: learning_rate,
lambda: tf.train.exponential_decay(
learning_rate,
(global_step - params['start_decay_step']),
params['decay_steps'],
params['decay_factor'],
staircase=True),
name="calc_learning_rate")
opt = tf.train.GradientDescentOptimizer(learning_rate)
elif params['optimizer'] == "adam":
assert float(params['lr']) <= 0.001, "! High Adam learning rate %g" % params['lr']
opt = tf.train.AdamOptimizer(learning_rate)
elif params['optimizer'] == 'adadelta':
opt = tf.train.AdadeltaOptimizer(learning_rate=learning_rate)
global_step = tf.train.get_or_create_global_step()
learning_rate = tf.constant(params['lr'])
if params['optimizer'] == "sgd":
learning_rate = tf.cond(
global_step < params['start_decay_step'],
lambda: learning_rate,
lambda: tf.train.exponential_decay(
learning_rate,
(global_step - params['start_decay_step']),
params['decay_steps'],
params['decay_factor'],
staircase=True),
name="calc_learning_rate")
opt = tf.train.GradientDescentOptimizer(learning_rate)
elif params['optimizer'] == "adam":
assert float(params['lr']) <= 0.001, "! High Adam learning rate %g" % params['lr']
opt = tf.train.AdamOptimizer(learning_rate)
elif params['optimizer'] == 'adadelta':
opt = tf.train.AdadeltaOptimizer(learning_rate=learning_rate)
update_ops = tf.get_collection(tf.GraphKeys.UPDATE_OPS)
with tf.control_dependencies(update_ops):
gradients, variables = zip(*opt.compute_gradients(total_loss))
clipped_gradients, _ = tf.clip_by_global_norm(gradients, params['max_gradient_norm'])
train_op = opt.apply_gradients(
zip(clipped_gradients, variables), global_step=global_step)
tf.identity(learning_rate, 'learning_rate')
tf.summary.scalar("learning_rate", learning_rate),
tf.summary.scalar("total_loss", total_loss),
#_log_variable_sizes(tf.trainable_variables(), "Trainable Variables")
return tf.estimator.EstimatorSpec(
mode=mode,
loss=total_loss,
train_op=train_op)
elif mode == tf.estimator.ModeKeys.EVAL:
encoder_input = features['encoder_input']
encoder_target = features['encoder_target']
decoder_input = features['decoder_input']
decoder_target = features['decoder_target']
my_encoder = encoder.Model(encoder_input, encoder_target, params, mode, 'Encoder')
encoder_outputs = my_encoder.encoder_outputs
#encoder_state = my_encoder.encoder_state
encoder_state = my_encoder.arch_emb
encoder_state.set_shape([None, params['decoder_hidden_size']])
encoder_state = tf.contrib.rnn.LSTMStateTuple(encoder_state, encoder_state)
encoder_state = (encoder_state,) * params['decoder_num_layers']
my_decoder = decoder.Model(encoder_outputs, encoder_state, decoder_input, decoder_target, params, mode, 'Decoder')
encoder_loss = my_encoder.loss
decoder_loss = my_decoder.loss
total_loss = params['trade_off'] * encoder_loss + (1-params['trade_off']) * decoder_loss + params['weight_decay'] * tf.add_n(
[tf.nn.l2_loss(v) for v in tf.trainable_variables()])
#_log_variable_sizes(tf.trainable_variables(), "Trainable Variables")
return tf.estimator.EstimatorSpec(
mode=mode,
loss=total_loss)
elif mode == tf.estimator.ModeKeys.PREDICT:
encoder_input = features['encoder_input']
encoder_target = features.get('encoder_target', None)
decoder_input = features.get('decoder_input', None)
decoder_target = features.get('decoder_target', None)
my_encoder = encoder.Model(encoder_input, encoder_target, params, mode, 'Encoder')
encoder_outputs = my_encoder.encoder_outputs
#encoder_state = my_encoder.encoder_state
encoder_state = my_encoder.arch_emb
encoder_state.set_shape([None, params['decoder_hidden_size']])
encoder_state = tf.contrib.rnn.LSTMStateTuple(encoder_state, encoder_state)
encoder_state = (encoder_state,) * params['decoder_num_layers']
my_decoder = decoder.Model(encoder_outputs, encoder_state, decoder_input, decoder_target, params, mode, 'Decoder')
res = my_encoder.infer()
predict_value = res['predict_value']
arch_emb = res['arch_emb']
new_arch_emb = res['new_arch_emb']
new_arch_outputs = res['new_arch_outputs']
res = my_decoder.decode()
sample_id = res['sample_id']
encoder_state = new_arch_emb
encoder_state.set_shape([None, params['decoder_hidden_size']])
encoder_state = tf.contrib.rnn.LSTMStateTuple(encoder_state, encoder_state)
encoder_state = (encoder_state,) * params['decoder_num_layers']
tf.get_variable_scope().reuse_variables()
my_decoder = decoder.Model(new_arch_outputs, encoder_state, decoder_input, decoder_target, params, mode, 'Decoder')
res = my_decoder.decode()
new_sample_id = res['sample_id']
#_log_variable_sizes(tf.trainable_variables(), "Trainable Variables")
predictions = {
'arch' : decoder_target,
'ground_truth_value' : encoder_target,
'predict_value' : predict_value,
'sample_id' : sample_id,
'new_sample_id' : new_sample_id,
}
_del_dict_nones(predictions)
return tf.estimator.EstimatorSpec(mode=mode, predictions=predictions)
def _log_variable_sizes(var_list, tag):
"""Log the sizes and shapes of variables, and the total size.
Args:
var_list: a list of varaibles
tag: a string
"""
name_to_var = {v.name: v for v in var_list}
total_size = 0
for v_name in sorted(list(name_to_var)):
v = name_to_var[v_name]
v_size = int(np.prod(np.array(v.shape.as_list())))
tf.logging.info("Weight %s\tshape %s\tsize %d",
v.name[:-2].ljust(80),
str(v.shape).ljust(20), v_size)
total_size += v_size
tf.logging.info("%s Total size: %d", tag, total_size)
def _del_dict_nones(d):
for k in list(d.keys()):
if d[k] is None:
del d[k]
def get_params():
params = vars(FLAGS)
if FLAGS.restore:
with open(os.path.join(FLAGS.model_dir, 'hparams.json'), 'r') as f:
old_params = json.load(f)
params.update(old_params)
return params
def pairwise_accuracy(la, lb):
N = len(la)
assert N == len(lb)
total = 0
count = 0
for i in range(N):
for j in range(i+1, N):
total += 1
if la[i] > la[j] and lb[i] > lb[j]:
count += 1
continue
if la[i] < la[j] and lb[i] < lb[j]:
count += 1
continue
return float(count) / total
def main(unparsed):
# Using the Winograd non-fused algorithms provides a small performance boost.
os.environ['TF_ENABLE_WINOGRAD_NONFUSED'] = '1'
with open(os.path.join(FLAGS.data_dir, 'encoder.train.input'), 'r') as f:
lines = f.read().splitlines()
_NUM_SAMPLES['train'] = len(lines)
with open(os.path.join(FLAGS.data_dir, 'encoder.test.input'), 'r') as f:
lines = f.read().splitlines()
_NUM_SAMPLES['test'] = len(lines)
if FLAGS.mode == 'train':
params = get_params()
#model_fn(tf.zeros([128,40,1], dtype=tf.int32),tf.zeros([128,1]),tf.estimator.ModeKeys.TRAIN, params)
with open(os.path.join(FLAGS.model_dir, 'hparams.json'), 'w') as f:
json.dump(params, f)
if os.path.exists(os.path.join(params['model_dir'], 'checkpoint')):
with open(os.path.join(params['model_dir'], 'checkpoint'), 'r') as f:
line = f.readline()
line = line.strip().split(' ')[-1]
line = line.split('-')[-1][:-1]
previous_step = int(line)
num_samples = _NUM_SAMPLES['train']
batches_per_epoch = num_samples / params['batch_size']
start_epoch_loop = int(previous_step / batches_per_epoch // FLAGS.eval_frequency)
else:
start_epoch_loop = 0
# Set up a RunConfig to only save checkpoints once per training cycle.
run_config = tf.estimator.RunConfig(
keep_checkpoint_max=1000,
save_checkpoints_secs=1e9)
estimator = tf.estimator.Estimator(
model_fn=model_fn, model_dir=params['model_dir'], config=run_config,
params=params)
for _ in range(start_epoch_loop, params['train_epochs'] // params['eval_frequency']):
tensors_to_log = {
'learning_rate': 'learning_rate',
'mean_squared_error': 'Encoder/squared_error',#'mean_squared_error'
'cross_entropy': 'Decoder/cross_entropy',#'mean_squared_error'
}
logging_hook = tf.train.LoggingTensorHook(
tensors=tensors_to_log, every_n_iter=100)
estimator.train(
input_fn=lambda: input_fn(
params, 'train', params['data_dir'], params['batch_size'], params['eval_frequency']),
hooks=[logging_hook])
# Evaluate the model and print results
eval_results = estimator.evaluate(
input_fn=lambda: input_fn(params, 'test', params['data_dir'], _NUM_SAMPLES['test']))
tf.logging.info('Evaluation on test data set')
print(eval_results)
result_iter = estimator.predict(lambda: input_fn(params, 'test', params['data_dir'], _NUM_SAMPLES['test']))
predictions_list, targets_list = [], []
for i, result in enumerate(result_iter):
predict_value = result['predict_value'].flatten()#[0]
targets = result['ground_truth_value'].flatten()#[0]
predictions_list.extend(predict_value)
targets_list.extend(targets)
predictions_list = np.array(predictions_list)
targets_list = np.array(targets_list)
mse = ((predictions_list - targets_list) ** 2).mean(axis=0)
pairwise_acc = pairwise_accuracy(targets_list, predictions_list)
tf.logging.info('test pairwise accuracy = {0}'.format(pairwise_acc))
tf.logging.info('test mean squared error = {0}'.format(mse))
elif FLAGS.mode == 'test':
if not os.path.exists(os.path.join(FLAGS.model_dir, 'hparams.json')):
raise ValueError('No hparams.json found in {0}'.format(FLAGS.model_dir))
with open(os.path.join(FLAGS.model_dir, 'hparams.json'), 'r') as f:
params = json.load(f)
estimator = tf.estimator.Estimator(
model_fn=model_fn, model_dir=FLAGS.model_dir, params=params)
eval_results = estimator.evaluate(
input_fn=lambda: input_fn(params, 'test', FLAGS.data_dir, _NUM_SAMPLES['test']))
tf.logging.info('Evaluation on test data set')
print(eval_results)
result_iter = estimator.predict(lambda: input_fn(params, 'test', params['data_dir'], _NUM_SAMPLES['test']))
predictions_list, targets_list = [], []
for i, result in enumerate(result_iter):
predict_value = result['predict_value'].flatten()#[0]
targets = result['ground_truth_value'].flatten()#[0]
predictions_list.extend(predict_value)
targets_list.extend(targets)
predictions_list = np.array(predictions_list)
targets_list = np.array(targets_list)
mse = ((predictions_list - targets_list) ** 2).mean(axis=0)
pairwise_acc = pairwise_accuracy(targets_list, predictions_list)
tf.logging.info('test pairwise accuracy = {0}'.format(pairwise_acc))
tf.logging.info('test mean squared error = {0}'.format(mse))
elif FLAGS.mode == 'predict':
if not os.path.exists(os.path.join(FLAGS.model_dir, 'hparams.json')):
raise ValueError('No hparams.json found in {0}'.format(FLAGS.model_dir))
params = vars(FLAGS)
with open(os.path.join(FLAGS.model_dir, 'hparams.json'), 'r') as f:
old_params = json.load(f)
for k,v in old_params.items():
if not k.startswith('predict'):
params[k] = v
estimator = tf.estimator.Estimator(
model_fn=model_fn, model_dir=FLAGS.model_dir, params=params)
predict_from_file(estimator, FLAGS.batch_size, FLAGS.predict_from_file, FLAGS.predict_to_file)
if __name__ == '__main__':
tf.logging.set_verbosity(tf.logging.INFO)
FLAGS, unparsed = parser.parse_known_args()
tf.app.run(argv=[sys.argv[0]] + unparsed)