def train(self, nz=100, batch_size=64, epochs=10000, gpu=-1, **kwargs):
# CIFAR-10 images in range [-1, 1] (tanh generator outputs)
train, _ = datasets.get_cifar10(withlabel=False, ndim=3, scale=2)
train -= 1.0
train_iter = chainer.iterators.SerialIterator(train, batch_size)
z_iter = RandomNoiseIterator(GaussianNoiseGenerator(0, 1, nz),
batch_size)
optimizer_generator = optimizers.RMSprop(lr=0.00005)
optimizer_critic = optimizers.RMSprop(lr=0.00005)
optimizer_generator.setup(self.generator)
optimizer_critic.setup(self.critic)
updater = WassersteinGANUpdater(
iterator=train_iter,
noise_iterator=z_iter,
optimizer_generator=optimizer_generator,
optimizer_critic=optimizer_critic,
device=gpu)
trainer = training.Trainer(updater,
stop_trigger=(epochs, 'epoch'),
out=self.model_path)
trainer.extend(training.extensions.ProgressBar())
trainer.extend(training.extensions.LogReport(trigger=(1, 'iteration')))
trainer.extend(GeneratorSample(), trigger=(1, 'epoch'))
trainer.extend(
training.extensions.PrintReport([
'epoch', 'iteration', 'critic/loss', 'critic/loss/real',
'critic/loss/fake', 'generator/loss'
]))
trainer.run()
def train(args):
nz = args.nz
batch_size = args.batch_size
epochs = args.epochs
gpu = args.gpu
# CIFAR-10 images in range [-1, 1] (tanh generator outputs)
train, _ = datasets.get_cifar10(withlabel=True, ndim=3, scale=2)
train_iter = iterators.SerialIterator(train, batch_size)
z_iter = RandomNoiseIterator(GaussianNoiseGenerator(0, 1, args.nz),
batch_size)
optimizer_generator = optimizers.RMSprop(lr=0.00005)
optimizer_critic = optimizers.RMSprop(lr=0.00005)
generator = Generator()
optimizer_generator.setup(generator)
optimizer_critic.setup(Critic())
updater = WassersteinGANUpdater(iterator=train_iter,
noise_iterator=z_iter,
optimizer_generator=optimizer_generator,
optimizer_critic=optimizer_critic,
device=gpu)
trainer = training.Trainer(updater,
stop_trigger=(epochs, 'epoch'),
out=args.out)
trainer.extend(extensions.ProgressBar())
trainer.extend(extensions.LogReport(trigger=(10, 'iteration')))
trainer.extend(GeneratorSample(), trigger=(1, 'epoch'))
trainer.extend(
extensions.PrintReport([
'epoch', 'iteration', 'critic/loss', 'critic/loss/real',
'critic/loss/fake', 'generator/loss'
]))
# Take a snapshot at each epoch
trainer.extend(
extensions.snapshot(filename='snapshot_epoch_{.updater.epoch}'),
trigger=(1, 'epoch'))
trainer.extend(extensions.snapshot_object(generator,
'model_epoch_{.updater.epoch}'),
trigger=(1, 'epoch'))
if args.resume:
# Resume from a snapshot
serializers.load_npz(args.resume, trainer)
trainer.run()
def setup_optimizer(self,
optimizer_name,
gradient_clipping=3,
weight_decay=0.00001,
**kwargs):
# set optimizer
if optimizer_name == "Adam":
self.opt = optimizers.Adam(**kwargs)
elif optimizer_name == "AdaDelta":
self.opt = optimizers.AdaDelta(**kwargs)
elif optimizer_name == "AdaGrad":
self.opt = optimizers.AdaGrad(**kwargs)
elif optimizer_name == "RMSprop":
self.opt = optimizers.RMSprop(**kwargs)
elif optimizer_name == "RMSpropGraves":
self.opt = optimizers.RMSpropGraves(**kwargs)
elif optimizer_name == "SGD":
self.opt = optimizers.SGD(**kwargs)
elif optimizer_name == "MomentumSGD":
self.opt = optimizers.MomentumSGD(**kwargs)
# self.opt.use_cleargrads()
self.opt.setup(self)
self.opt.add_hook(optimizer.GradientClipping(gradient_clipping))
self.opt.add_hook(optimizer.WeightDecay(weight_decay))
self.opt_params = {
"optimizer_name": optimizer_name,
"gradient_clipping": gradient_clipping,
"weight_decay": weight_decay
}
def optimizer(opt_str):
"""
入力文字列からオプティマイザを推定する
"""
if (opt_str.lower() == 'adam'):
opt = O.Adam(amsgrad=True)
elif (opt_str.lower() == 'ada_d'):
opt = O.AdaDelta()
elif (opt_str.lower() == 'ada_g'):
opt = O.AdaGrad()
elif (opt_str.lower() == 'm_sgd'):
opt = O.MomentumSGD()
elif (opt_str.lower() == 'n_ag'):
opt = O.NesterovAG()
elif (opt_str.lower() == 'rmsp'):
opt = O.RMSprop()
elif (opt_str.lower() == 'rmsp_g'):
opt = O.RMSpropGraves()
elif (opt_str.lower() == 'sgd'):
opt = O.SGD()
elif (opt_str.lower() == 'smorms'):
opt = O.SMORMS3()
else:
opt = O.Adam(amsgrad=True)
logger.warning('{}->{}'.format(opt_str, opt.__doc__.split('.')[0]))
logger.debug('Optimizer: {}'.format(opt.__doc__.split('.')[0]))
return opt
def optimizer(opt_str):
"""
入力文字列からオプティマイザを推定する
"""
if(opt_str.lower() == 'adam'):
opt = O.Adam(amsgrad=True)
elif(opt_str.lower() == 'ada_d'):
opt = O.AdaDelta()
elif(opt_str.lower() == 'ada_g'):
opt = O.AdaGrad()
elif(opt_str.lower() == 'm_sgd'):
opt = O.MomentumSGD()
elif(opt_str.lower() == 'n_ag'):
opt = O.NesterovAG()
elif(opt_str.lower() == 'rmsp'):
opt = O.RMSprop()
elif(opt_str.lower() == 'rmsp_g'):
opt = O.RMSpropGraves()
elif(opt_str.lower() == 'sgd'):
opt = O.SGD()
elif(opt_str.lower() == 'smorms'):
opt = O.SMORMS3()
else:
opt = O.Adam(amsgrad=True)
print('\n[Warning] {0}\n\t{1}->{2}\n'.format(
fileFuncLine(), opt_str, opt.__doc__.split('.')[0])
)
print('Optimizer:', opt.__doc__.split('.')[0])
return opt
def get_optimizer(model,
opt,
lr=None,
adam_alpha=None,
adam_beta1=None,
adam_beta2=None,
adam_eps=None,
weight_decay=None):
if opt == 'MomentumSGD':
optimizer = optimizers.MomentumSGD(lr=lr, momentum=0.9)
elif opt == 'Adam':
optimizer = optimizers.Adam(alpha=adam_alpha,
beta1=adam_beta1,
beta2=adam_beta2,
eps=adam_eps)
elif opt == 'AdaGrad':
optimizer = optimizers.AdaGrad(lr=lr)
elif opt == 'RMSprop':
optimizer = optimizers.RMSprop(lr=lr)
else:
raise Exception('No optimizer is selected')
# The first model as the master model
optimizer.setup(model)
if opt == 'MomentumSGD':
optimizer.add_hook(chainer.optimizer.WeightDecay(weight_decay))
return optimizer
def __init__(self, model=None, lr=0.045, decay=0.9, eps=1.0, weight_decay=4.0e-5, clip=2.0):
super(OptimizerGooglenetV3, self).__init__(model)
optimizer = optimizers.RMSprop(lr, decay, eps)
weight_decay = chainer.optimizer.WeightDecay(weight_decay)
clip = chainer.optimizer.GradientClipping(clip)
optimizer.setup(self.model)
optimizer.add_hook(weight_decay)
optimizer.add_hook(clip)
self.optimizer = optimizer
def init_optimizer(self, clip, decay, lr=0.001, alpha=0.9, eps=1e-6):
self.optimizer = optimizers.RMSprop(lr=lr, alpha=alpha, eps=eps)
self.optimizer.setup(self.model)
# Clip Gradient
self.optimizer.add_hook(chainer.optimizer.GradientClipping(clip))
# L2 Regularization
self.optimizer.add_hook(chainer.optimizer.WeightDecay(decay))
def test_share_states(self):
model = L.Linear(2, 2)
opt_a = optimizers.RMSprop()
opt_a.setup(model)
arrays = async .share_states_as_shared_arrays(opt_a)
opt_b = optimizers.RMSprop()
opt_b.setup(model)
opt_c = optimizers.RMSprop()
opt_c.setup(model)
def assert_different_pointers(a, b):
self.assertTrue(a)
for param_name in a:
self.assertTrue(a[param_name])
for state_name in a[param_name]:
self.assertTrue(
isinstance(a[param_name][state_name], np.ndarray))
self.assertTrue(
isinstance(b[param_name][state_name], np.ndarray))
self.assertNotEqual(a[param_name][state_name].ctypes.data,
b[param_name][state_name].ctypes.data)
assert_different_pointers(opt_a._states, opt_b._states)
assert_different_pointers(opt_a._states, opt_c._states)
async .set_shared_states(opt_b, arrays)
async .set_shared_states(opt_c, arrays)
def assert_same_pointers(a, b):
self.assertTrue(a)
for param_name in a:
self.assertTrue(a[param_name])
for state_name in a[param_name]:
self.assertTrue(
isinstance(a[param_name][state_name], np.ndarray))
self.assertTrue(
isinstance(b[param_name][state_name], np.ndarray))
self.assertEqual(a[param_name][state_name].ctypes.data,
b[param_name][state_name].ctypes.data)
assert_same_pointers(opt_a._states, opt_b._states)
assert_same_pointers(opt_a._states, opt_c._states)
def test_share_states(self):
model = L.Linear(2, 2)
opt_a = optimizers.RMSprop()
opt_a.setup(model)
arrays = async_.share_states_as_shared_arrays(opt_a)
opt_b = optimizers.RMSprop()
opt_b.setup(copy.deepcopy(model))
# In Chainer v2, a model cannot be set up by two optimizers or more.
opt_c = optimizers.RMSprop()
opt_c.setup(copy.deepcopy(model))
"""
Removed the tests by assert_different_pointers
since they are trivial now.
"""
async_.set_shared_states(opt_b, arrays)
async_.set_shared_states(opt_c, arrays)
def assert_same_pointers(a, b):
a = a.target
b = b.target
for param_name, param_a in a.namedparams():
param_b = dict(b.namedparams())[param_name]
state_a = param_a.update_rule.state
state_b = param_b.update_rule.state
self.assertTrue(state_a)
self.assertTrue(state_b)
for state_name, state_val_a in state_a.items():
state_val_b = state_b[state_name]
self.assertTrue(isinstance(
state_val_a, np.ndarray))
self.assertTrue(isinstance(
state_val_b, np.ndarray))
self.assertEqual(state_val_a.ctypes.data,
state_val_b.ctypes.data)
assert_same_pointers(opt_a, opt_b)
assert_same_pointers(opt_a, opt_c)
def get_optimizer(name, lr, momentum):
if name == "sgd":
return optimizers.SGD(lr=lr)
if name == "msgd":
return optimizers.MomentumSGD(lr=lr, momentum=momentum)
if name == "nesterov":
return optimizers.NesterovAG(lr=lr, momentum=momentum)
if name == "adam":
return optimizers.Adam(alpha=lr, beta1=momentum)
if name == "rmsprop":
return optimizers.RMSprop(lr=lr, alpha=momentum)
raise NotImplementedError()
def init_optimizer(self):
if self.optimizer == 'SGD':
self.optimizer = optimizers.MomentumSGD(lr=self.learning_rate,
momentum=self.momentum)
elif self.optimizer == 'AdaDelta':
self.optimizer = optimizers.AdaDelta()
elif self.optimizer == 'AdaGrad':
self.optimizer = optimizers.AdaGrad()
elif self.optimizer == 'Adam':
self.optimizer = optimizers.Adam()
elif self.optimizer == 'RMSprop':
self.optimizer = optimizers.RMSprop()
def cross_optimizers(opt):
if opt == 'SGD':
optimizer = optimizers.SGD()
elif opt == 'MomentumSGD':
optimizer = optimizers.MomentumSGD()
elif opt == 'AdaGrad':
optimizer = optimizers.AdaGrad()
elif opt == 'RMSprop':
optimizer = optimizers.RMSprop()
elif opt == 'AdaDelta':
optimizer = optimizers.AdaDelta()
elif opt == 'Adam':
optimizer = optimizers.Adam()
return copy.deepcopy(optimizer)
def _build_optimizer(self, trial, model):
# option of optimizer funciton
optimizer_name = trial.suggest_categorical(
'optimizer', ['Adam', "AdaDelta", 'RMSProp'])
if optimizer_name == 'Adam':
adam_alpha = trial.suggest_loguniform('adam_alpha', 1e-5, 1e-1)
optimizer = optimizers.Adam(alpha=adam_alpha)
elif optimizer_name == "AdaDelta":
optimizer = optimizers.AdaDelta()
elif optimizer_name == "RMSprop":
optimizer = optimizers.RMSprop()
weight_decay = trial.suggest_loguniform('weight_decay', 1e-10, 1e-3)
optimizer.setup(model)
optimizer.add_hook(chainer.optimizer.WeightDecay(weight_decay))
return optimizer
def select_optimizer(name):
if name == "AdaGrad":
optimizer = optimizers.AdaGrad(lr=0.001)
elif name == "Adam":
optimizer = chainer.optimizers.Adam(alpha=0.0001)
elif name == "MomentumSGD":
optimizer = optimizers.MomentumSGD(lr=0.01)
elif name == "RMSprop":
optimizer = optimizers.RMSprop(lr=0.01)
elif name == "SGD":
optimizer = optimizers.SGD(lr=0.01)
elif name == "AdaDelta":
optimizer = optimizers.AdaDelta(rho=0.9)
else:
raise Exception("Unknown network optimizer: " + args.optimizer)
return optimizer
def get_optimizer(self, name, lr, momentum=0.9):
if name.lower() == "adam":
return optimizers.Adam(alpha=lr, beta1=momentum)
if name.lower() == "smorms3":
return optimizers.SMORMS3(lr=lr)
if name.lower() == "adagrad":
return optimizers.AdaGrad(lr=lr)
if name.lower() == "adadelta":
return optimizers.AdaDelta(rho=momentum)
if name.lower() == "nesterov" or name.lower() == "nesterovag":
return optimizers.NesterovAG(lr=lr, momentum=momentum)
if name.lower() == "rmsprop":
return optimizers.RMSprop(lr=lr, alpha=momentum)
if name.lower() == "momentumsgd":
return optimizers.MomentumSGD(lr=lr, mommentum=mommentum)
if name.lower() == "sgd":
return optimizers.SGD(lr=lr)
def get_optimizer(name):
"""
:type name: str
:rtype: chainer.Optimizer
"""
if name == "adadelta":
opt = optimizers.AdaDelta()
elif name == "adagrad":
opt = optimizers.AdaGrad()
elif name == "adam":
opt = optimizers.Adam()
elif name == "rmsprop":
opt = optimizers.RMSprop()
elif name == "smorms3":
opt = optimizers.SMORMS3()
else:
raise ValueError("Unknown optimizer_name=%s" % name)
return opt
def select_optimizer(opt_name, learning_rate):
if opt_name == "Adam":
return optimizers.Adam(alpha=learning_rate)
elif opt_name == "SGD":
return optimizers.SGD(lr=learning_rate)
elif opt_name == "RMSpropGraves":
return optimizers.RMSpropGraves(lr=learning_rate)
elif opt_name == "RMSprop":
return optimizers.RMSprop(lr=learning_rate)
elif opt_name == "AdaDelta":
return optimizers.AdaDelta()
elif opt_name == "AdaGrad":
return optimizers.AdaGrad(lr=learning_rate)
elif opt_name == "MomentumSGD":
return optimizers.MomentumSGD(lr=learning_rate)
elif opt_name == "NesterovAG":
return optimizers.NesterovAG(lr=learning_rate)
else:
print('please select correct optimizer')
exit()
def setOptimizer(model, method, params):
learningRate = params['learningRate'] if (
params.has_key('learningRate')) else 0.001
alpha = params['alpha'] if (params.has_key('alpha')) else 0.001
if (method == 'adam'):
optimizer = optimizers.Adam(alpha=alpha)
elif (method == 'smorms3'):
optimizer = optimizers.SMORMS3(lr=learningRate)
elif (method == 'rmsprop'):
optimizer = optimizers.RMSprop(lr=learningRate)
elif (method == 'sgd'):
optimizer = optimizers.SGD(lr=learningRate)
elif (method == 'momentum'):
optimizer = optimizers.MomentumSGD(lr=learningRate)
elif (method == 'adagrad'):
optimizer = optimizers.AdaGrad(lr=learningRate)
elif (method == 'adadelta'):
optimizer = optimizers.AdaDelta()
optimizer.setup(model)
return optimizer
def train(max_epoch, train_size, valid_size):
model = RNN()
# train に1000サンプル、 testに1000サンプル使用
x_train, x_test, y_train, y_test = dataset(train_size + valid_size, train_size)
optimizer = optimizers.RMSprop(lr=0.03)
optimizer.setup(model)
early_stopping = 20
min_valid_loss = 1e8
min_epoch = 0
train_loss, valid_loss = [], []
for epoch in range(1, max_epoch):
_y = model(x_test)
y = _y.data
y = np.array([1 - y, y], dtype='f').T[0]
accuracy = F.accuracy(y, y_test.data.flatten()).data
_train_loss = F.sigmoid_cross_entropy(model(x_train), y_train).data
_valid_loss = F.sigmoid_cross_entropy(_y, y_test).data
train_loss.append(_train_loss)
valid_loss.append(_valid_loss)
# valid_lossが20回連続で更新されなかった時点で学習を終了
if min_valid_loss >= _valid_loss:
min_valid_loss = _valid_loss
min_epoch = epoch
elif epoch - min_epoch >= early_stopping:
break
optimizer.update(forward, x_train, y_train, model)
print('epoch: {} acc: {} loss: {} valid_loss: {}'.format(epoch, accuracy, _train_loss, _valid_loss))
loss_plot(train_loss, valid_loss)
serializers.save_npz('model.npz', model)
def set_params(self, params):
self.gpu = params.get('gpu', False)
self.learning_rate = params.get('learning_rate', 0.00025)
self.decay_rate = params.get('decay_rate', 0.95)
self.discount = params.get('discount', 0.95)
self.clip_err = params.get('clip_err', False)
self.target_net_update = params.get('target_net_update', 10000)
self.double_DQN = params.get('double_DQN', False)
# setting up various possible gradient update algorithms
opt = params.get('optim_name', 'ADAM')
if opt == 'RMSprop':
self.optimizer = optimizers.RMSprop(lr=self.learning_rate,
alpha=self.decay_rate)
elif opt == 'ADADELTA':
print(
"Supplied learning rate not used with ADADELTA gradient update method"
)
self.optimizer = optimizers.AdaDelta()
elif opt == 'ADAM':
self.optimizer = optimizers.Adam(alpha=self.learning_rate)
elif opt == 'SGD':
self.optimizer = optimizers.SGD(lr=self.learning_rate)
else:
print('The requested optimizer is not supported!!!')
exit()
if self.clip_err is not False:
self.optimizer.add_hook(
chainer.optimizer.GradientClipping(self.clip_err))
self.optim_name = params['optim_name']
def main():
parser = argparse.ArgumentParser(description='Chainer: WGAN MNIST')
parser.add_argument('--batchsize',
'-b',
type=int,
default=50,
help='Number of images in each mini-batch')
parser.add_argument('--epoch',
'-e',
type=int,
default=100,
help='Number of sweeps over the dataset to train')
parser.add_argument('--gpu',
'-g',
type=int,
default=-1,
help='GPU ID (negative value indicates CPU)')
parser.add_argument('--out',
'-o',
default='result',
help='Directory to output the result')
parser.add_argument('--n_hidden',
'-n',
type=int,
default=100,
help='Number of hidden dim of units (z)')
parser.add_argument('--snapshot_interval',
type=int,
default=1000,
help='Interval of snapshot')
parser.add_argument('--seed',
type=int,
default=0,
help='Random seed of z at visualization stage')
parser.add_argument('--display_interval',
type=int,
default=100,
help='Interval of displaying log to console')
args = parser.parse_args()
print('GPU: {}'.format(args.gpu))
print('# Minibatch-size: {}'.format(args.batchsize))
print('# n_hidden: {}'.format(args.n_hidden))
print('# epoch: {}'.format(args.epoch))
print('')
train, _ = datasets.get_mnist(withlabel=False, ndim=3,
scale=1.) # ndim=3 : (ch,width,height)
train_iter = chainer.iterators.SerialIterator(train, args.batchsize)
#z_iter = RandomNoiseIterator(GaussianNoiseGenerator(0, 1, args.n_hidden), args.batchsize)
z_iter = RandomNoiseIterator(UniformNoiseGenerator(-1, 1, args.n_hidden),
args.batchsize)
# make the model
gen = Generator(n_hidden=args.n_hidden)
critic = Critic()
if args.gpu >= 0:
# make a specified GPU current
chainer.cuda.get_device_from_id(args.gpu).use()
gen.to_gpu() # copy the model to the GPU
critic.to_gpu()
# make the optimizer
optimizer_generator = optimizers.RMSprop(lr=0.00005)
optimizer_critic = optimizers.RMSprop(lr=0.00005)
optimizer_generator.setup(gen)
optimizer_critic.setup(critic)
updater = WGANUpdater(iterator=train_iter,
noise_iterator=z_iter,
optimizer_generator=optimizer_generator,
optimizer_critic=optimizer_critic,
device=args.gpu)
epoch_interval = (10, 'epoch')
display_interval = (10, 'iteration')
trainer = training.Trainer(updater, (args.epoch, 'epoch'), out=args.out)
trainer.extend(extensions.LogReport(trigger=display_interval))
trainer.extend(
extensions.snapshot(filename='snapshot_epoch_{.updater.epoch}.npz'),
trigger=epoch_interval)
trainer.extend(extensions.snapshot_object(
gen, 'gen_epoch_{.updater.epoch}.npz'),
trigger=epoch_interval)
trainer.extend(extensions.snapshot_object(
critic, 'critic_epoch_{.updater.epoch}.npz'),
trigger=epoch_interval)
trainer.extend(extensions.PrintReport([
'epoch', 'iteration', 'critic/loss', 'critic/loss/real',
'critic/loss/fake', 'generator/loss'
]),
trigger=display_interval)
trainer.extend(extensions.ProgressBar(update_interval=10))
trainer.extend(out_generated_image(gen, 10, 10, args.seed, args.out,
args.n_hidden),
trigger=epoch_interval)
trainer.run()
def create(self):
kwargs = {'eps_inside_sqrt': self.eps_inside_sqrt}
if self.dtype == numpy.float16:
kwargs['eps'] = 1e-6
return optimizers.RMSprop(0.1, **kwargs)
def do_train(
db_model,
root_output_dir,
filename,
vocabulary,
use_mecab=False,
initmodel=None,
resume=False,
rnn_size=128,
learning_rate=2e-3,
learning_rate_decay=0.97,
learning_rate_decay_after=10,
decay_rate=0.95,
dropout=0.0,
seq_length=50,
batchsize=50, # minibatch size
grad_clip=5, # gradient norm threshold to clip
interruptable=None
):
logger.info('Start LSTM training. model_id: {0}, use_mecab: {1}, initmodel: {2}, gpu: {3}'
.format(db_model.id, use_mecab, initmodel, db_model.gpu))
n_epoch = db_model.epoch
bprop_len = seq_length # length of truncated BPTT
grad_clip = grad_clip
(model_dir, model_name) = os.path.split(db_model.network_path)
model_name = re.sub(r"\.py$", "", model_name)
model_module = load_module(model_dir, model_name)
if db_model.trained_model_path is None:
db_model.trained_model_path = os.path.join(root_output_dir, model_name)
if not os.path.exists(db_model.trained_model_path):
os.mkdir(db_model.trained_model_path)
vocab = {}
vocab_size = 0
if vocabulary != '':
vocab = pickle.load(open(vocabulary, 'rb'))
vocab_size = len(vocab)
if db_model.gpu >= 0:
cuda.check_cuda_available()
xp = cuda.cupy if db_model.gpu >= 0 else np
train_data, words, vocab = load_data(filename, use_mecab, vocab)
pickle.dump(vocab, open('%s/vocab2.bin' % db_model.trained_model_path, 'wb'))
# Prepare model
lm = model_module.Network(len(vocab), rnn_size, dropout_ratio=dropout, train=False)
model = L.Classifier(lm)
model.compute_accuracy = False # we only want the perplexity
for param in model.params():
data = param.data
data[:] = np.random.uniform(-0.1, 0.1, data.shape)
# Setup optimizer
optimizer = optimizers.RMSprop(lr=learning_rate, alpha=decay_rate, eps=1e-8)
optimizer.setup(model)
# Load pretrained model
if initmodel is not None and initmodel.find("model") > -1:
if vocabulary == '':
logger.info("Load model from : " + db_model.trained_model_path + os.sep + initmodel)
serializers.load_npz(os.path.join(db_model.trained_model_path, initmodel), model)
else:
lm2 = model_module.Network(vocab_size, rnn_size, dropout_ratio=dropout, train=False)
model2 = L.Classifier(lm2)
model2.compute_accuracy = False # we only want the perplexity
logger.info("Load model from : " + db_model.trained_model_path + os.sep + initmodel)
serializers.load_npz(os.path.join(db_model.trained_model_path, initmodel), model2)
copy_model(model2, model)
# delete old models
try:
shutil.copyfile(os.path.join(db_model.trained_model_path, initmodel),
os.path.join(db_model.trained_model_path, 'previous_' + initmodel))
except Exception as e:
logger.exception('Could not copy {0} to {1}. {2}'
.format(os.path.join(db_model.trained_model_path, initmodel),
os.path.join(db_model.trained_model_path,
'previous_' + initmodel), e))
raise e
pretrained_models = sorted(os.listdir(db_model.trained_model_path), reverse=True)
for m in pretrained_models:
if m.startswith('model') and initmodel != m:
try:
os.remove(os.path.join(db_model.trained_model_path, m))
except Exception as e:
logger.exception('Could not remove old trained model: {0} {1}'
.format(os.path.join(db_model.trained_model_path, m), e))
raise e
if db_model.gpu >= 0:
cuda.get_device(db_model.gpu).use()
model.to_gpu()
# Load pretrained optimizer
resume_path = os.path.join(db_model.trained_model_path, 'resume')
if resume:
logger.info("Load optimizer state from : {}".format(os.path.join(db_model.trained_model_path, 'resume.state')))
serializers.load_npz(os.path.join(resume_path, 'resume.model'), model)
serializers.load_npz(os.path.join(resume_path, 'resume.state'), optimizer)
db_model.is_trained = 1
db_model.update_and_commit()
# Learning loop
whole_len = train_data.shape[0]
jump = whole_len // batchsize
if resume:
resume_data = json.load(open(os.path.join(resume_path, 'resume.json')))
initmodel = resume_data['initmodel']
cur_log_perp = xp.zeros(())
cur_log_perp += resume_data['cur_log_perp']
loss_for_graph = xp.zeros(())
loss_for_graph += resume_data['loss_for_graph']
iteration_from = resume_data['i']
epoch = (iteration_from + 1) / jump
else:
cur_log_perp = xp.zeros(())
loss_for_graph = xp.zeros(())
iteration_from = 0
epoch = 0
start_at = time.time()
cur_at = start_at
accum_loss = 0
batch_idxs = list(range(batchsize))
graph_tsv_path = os.path.join(db_model.trained_model_path, 'line_graph.tsv')
train_log_path = os.path.join(db_model.trained_model_path, 'train.log')
if not resume:
with open(graph_tsv_path, 'a') as fp:
fp.write('count\tepoch\tperplexity\n')
with open(train_log_path, 'a') as fp:
fp.write(json.dumps({
'type': 'text',
'text': "going to train {} iterations".format(jump * n_epoch)
}) + '\n')
# delete layer visualization cache
# trained_model_pathに存在する全てのディレクトリを削除している。
for f in os.listdir(db_model.trained_model_path):
if os.path.isdir(os.path.join(db_model.trained_model_path, f)):
try:
shutil.rmtree(os.path.join(db_model.trained_model_path, f))
except Exception as e:
logger.exception('Could not remove visualization cache: {0} {1}'
.format(os.path.join(db_model.trained_model_path, f), e))
raise e
# ので、↓のresumeファイルの削除は不要
# remove_resume_file(db_model.trained_model_path)
for i in six.moves.range(iteration_from, jump * n_epoch):
# 1バッチが終わったタイミングを意図している。
if interruptable.is_interrupting() and isinstance(accum_loss, int):
os.mkdir(resume_path)
serializers.save_npz(os.path.join(resume_path, 'resume.state'), optimizer)
serializers.save_npz(os.path.join(resume_path, 'resume.model'), model)
json.dump({
'i': i,
'initmodel': initmodel,
'cur_log_perp': float(cur_log_perp),
'loss_for_graph': float(loss_for_graph),
'epoch': epoch
}, open(os.path.join(resume_path, 'resume.json'), 'w'))
interruptable.set_interruptable()
while True:
time.sleep(1)
x = chainer.Variable(
xp.asarray([train_data[(jump * j + i) % whole_len] for j in batch_idxs]))
t = chainer.Variable(
xp.asarray([train_data[(jump * j + i + 1) % whole_len] for j in batch_idxs]))
loss_i = model(x, t)
accum_loss += loss_i
loss_for_graph += loss_i.data
cur_log_perp += loss_i.data
if (i + 1) % bprop_len == 0: # Run truncated BPTT
model.zerograds()
accum_loss.backward()
accum_loss.unchain_backward() # truncate
accum_loss = 0
optimizer.update()
if (i + 1) % 100 == 0:
now = time.time()
throuput = 10000. / (now - cur_at)
perp = math.exp(float(cur_log_perp) / 10000)
with open(train_log_path, 'a') as fp:
fp.write(json.dumps({
'type': 'log',
'log': 'iter {} training perplexity: {:.2f} ({:.2f} iters/sec)'.format(i + 1, perp, throuput),
'time_stamp': datetime.datetime.now().strftime('%Y-%m-%d %H:%M:%S'),
'epoch': epoch
}) + '\n')
cur_at = now
cur_log_perp.fill(0)
if (i + 1) % 100 == 0:
perp_for_graph = math.exp(float(loss_for_graph) / 100)
with open(graph_tsv_path, 'a') as fp:
fp.write('{}\t{}\t{:.2f}\n'.format(i + 1, epoch, perp_for_graph))
loss_for_graph.fill(0)
if (i + 1) % jump == 0:
epoch += 1
now = time.time()
cur_at += time.time() - now # skip time of evaluation
with open(train_log_path, 'a') as fp:
if epoch >= 6:
optimizer.lr /= 1.2
fp.write(json.dumps({
'type': 'data',
'text': 'learning rate = {:.10f}'.format(optimizer.lr),
}) + '\n')
fp.write(json.dumps({
'type': 'text',
'text': '--- epoch: {} ------------------------'.format(epoch),
}) + '\n')
# Save the model and the optimizer
serializers.save_npz(os.path.join(db_model.trained_model_path,
'model%04d' % epoch), model)
serializers.save_npz(os.path.join(db_model.trained_model_path,
'rnnlm.state'), optimizer)
sys.stdout.flush()
if os.path.exists(os.path.join(db_model.trained_model_path, 'previous_' + initmodel)):
# delete backup file
try:
os.remove(os.path.join(db_model.trained_model_path, 'previous_' + initmodel))
except Exception as e:
logger.exception('Could not remove backuped file: {0} {1}'
.format(os.path.join(db_model.trained_model_path,
'previous_' + initmodel), e))
raise e
with open(train_log_path, 'a') as fp:
fp.write(json.dumps({
'type': 'text',
'text': '===== finish train. =====',
}) + '\n')
db_model.is_trained = 2
db_model.pid = None
db_model.gpu = None
db_model.update_and_commit()
interruptable.clear_interrupt()
interruptable.terminate()
logger.info('Finish LSTM train. model_id: {0}'.format(db_model.id))
def create(self):
if self.dtype == numpy.float16:
kwargs = {'eps': 1e-6}
else:
kwargs = {}
return optimizers.RMSprop(0.1, **kwargs)
bprop_len = args.seq_length
grad_clip = args.grad_clip
train_data, words, vocab = load_data(args)
pickle.dump(vocab, open('%s/vocab.bin'%args.data_dir, 'wb'))
if len(args.init_from) > 0:
model = pickle.load(open(args.init_from, 'rb'))
else:
model = CharRNN(len(vocab), n_units)
if args.gpu >= 0:
cuda.init()
model.to_gpu()
optimizer = optimizers.RMSprop(lr=args.learning_rate, alpha=args.decay_rate, eps=1e-8)
optimizer.setup(model)
whole_len = train_data.shape[0]
jump = whole_len / batchsize
epoch = 0
start_at = time.time()
cur_at = start_at
state = make_initial_state(n_units, batchsize=batchsize)
if args.gpu >= 0:
accum_loss = Variable(cuda.zeros(()))
for key, value in state.items():
value.data = cuda.to_gpu(value.data)
else:
accum_loss = Variable(np.zeros(()).astype(np.float32))
repeat=False,
shuffle=False)
test_iter = iterators.SerialIterator(test,
batch_size,
repeat=False,
shuffle=False)
# model = LeNet5()
model = CNN()
model = L.Classifier(model)
device = -1
if device >= 0:
model.to_gpu(device)
optimizer = optimizers.RMSprop()
optimizer.setup(model)
updater = training.updaters.StandardUpdater(train_iter,
optimizer,
device=device)
trainer = training.Trainer(updater, (max_epochs, 'epoch'), out=output_file)
# add extensions to current trainer
trainer.extend(extensions.LogReport()) # save log fiels automatically
# automatically serialize the state periodically
trainer.extend(
extensions.snapshot(filename='snapshot_epoch--{.updater.epoch}'))
# evaluate models on validation set
def train(
output_path,
train_data,
words,
vocab,
fine_tuning=True,
pretrained_vocab_size=0,
gpu=-1,
n_epoch=100,
rnn_size=128,
learning_rate=2e-3,
learning_rate_decay=0.97,
learning_rate_decay_after=10,
decay_rate=0.95,
dropout=0.0,
bprop_len=50,
batchsize=50, # minibatch size
grad_clip=5 # gradient norm threshold to clip
):
xp = cuda.cupy if gpu >= 0 else np
# Prepare model
lm = Network(len(vocab), rnn_size, dropout_ratio=dropout, train=True)
model = L.Classifier(lm)
model.compute_accuracy = False # we only want the perplexity
# load pre-trained model
pretrained_model_path = os.path.join(output_path, 'model.npz')
if fine_tuning and os.path.exists(pretrained_model_path):
lm2 = Network(pretrained_vocab_size,
rnn_size,
dropout_ratio=dropout,
train=True)
model2 = L.Classifier(lm2)
model2.compute_accuracy = False
serializers.load_npz(pretrained_model_path, model2)
copy_model(model2, model)
# Setup optimizer
optimizer = optimizers.RMSprop(lr=learning_rate,
alpha=decay_rate,
eps=1e-8)
optimizer.setup(model)
if gpu >= 0:
cuda.get_device(gpu).use()
model.to_gpu()
# Learning loop
whole_len = train_data.shape[0]
jump = whole_len // batchsize
cur_log_perp = xp.zeros(())
epoch = 0
start_at = time.time()
cur_at = start_at
accum_loss = 0
batch_idxs = list(range(batchsize))
print 'Goint to train {} iterations'.format(jump * n_epoch)
for i in six.moves.range(jump * n_epoch):
x = chainer.Variable(
xp.asarray(
[train_data[(jump * j + i) % whole_len] for j in batch_idxs]))
t = chainer.Variable(
xp.asarray([
train_data[(jump * j + i + 1) % whole_len] for j in batch_idxs
]))
loss_i = model(x, t)
accum_loss += loss_i
if (i + 1) % bprop_len == 0: # Run truncated BPTT
model.zerograds()
accum_loss.backward()
accum_loss.unchain_backward() # truncate
accum_loss = 0
optimizer.update()
if (i + 1) % 500 == 0:
now = time.time()
throuput = 10000. / (now - cur_at)
perp = math.exp(float(cur_log_perp) / 10000)
print 'epoch {} iter {} training perplexity: {:.2f} ({:.2f} iters/sec)'.format(
epoch, i + 1, perp, throuput)
cur_at = now
cur_log_perp.fill(0)
if (i + 1) % jump == 0:
epoch += 1
now = time.time()
cur_at += time.time() - now # skip time of evaluation
if epoch >= 6:
optimizer.lr /= 1.2
print 'learning rate = {:.10f}'.format(optimizer.lr)
# Save the model and the optimizer
serializers.save_npz('{}/model.npz'.format(output_path), model)
serializers.save_npz('{}/rnnlm.state.npz'.format(output_path),
optimizer)
print '===== finish train. ====='
def train(self, x, t, train=True):
h = self.__call__(x, train=train)
loss = chainer.functions.mean_squared_error(h, t)
return loss
print "Loading dataset"
X, y = loadDataset()
X, y = X.astype(np.float32), y.astype(np.float32)
X_train, X_test, y_train, y_test = train_test_split(X,
y,
test_size=0.2,
random_state=1337)
y_train.shape, y_test.shape = (y_train.shape[0], 1), (y_test.shape[0], 1)
alex = Alex()
optimizer = optimizers.RMSprop(lr=0.001, alpha=0.9)
# optimizer = optimizers.RMSprop()
optimizer.setup(alex)
for i in range(150):
optimizer.zero_grads()
alex.zerograds()
loss = alex.train(chainer.Variable(X_train), chainer.Variable(y_train))
eval_loss = F.mean_squared_error(alex(chainer.Variable(X_test)),
chainer.Variable(y_test))
print "epoch: %d, eval, train loss: %f, eval loss: %f" % (i, loss.data,
eval_loss.data)
loss.backward()
optimizer.clip_grads(2.0)
optimizer.update()
def create(self):
return optimizers.RMSprop(0.1)
