def get_ae_pretrainer(layer, data, batch_size, epochs=30):
init_lr = 0.05
train_algo = SGD(
batch_size=batch_size,
learning_rate=init_lr,
learning_rule=Momentum(init_momentum=0.5),
monitoring_batches=batch_size,
monitoring_dataset=data,
# for ContractiveAutoencoder:
# cost=cost.SumOfCosts(costs=[[1., MeanSquaredReconstructionError()],
# [0.5, cost.MethodCost(method='contraction_penalty')]]),
# for HigherOrderContractiveAutoencoder:
# cost=cost.SumOfCosts(costs=[[1., MeanSquaredReconstructionError()],
# [0.5, cost.MethodCost(method='contraction_penalty')],
# [0.5, cost.MethodCost(method='higher_order_penalty')]]),
# for DenoisingAutoencoder:
cost=MeanSquaredReconstructionError(),
termination_criterion=EpochCounter(epochs))
return Train(model=layer,
algorithm=train_algo,
dataset=data,
extensions=[
MomentumAdjustor(final_momentum=0.9, start=0,
saturate=25),
LinearDecayOverEpoch(start=1,
saturate=25,
decay_factor=.02)
])
def create_adjustors(self):
initial_momentum = .5
final_momentum = .99
start = 1
saturate = self.max_epochs
self.momentum_adjustor = learning_rule.MomentumAdjustor(
final_momentum, start, saturate)
self.momentum_rule = learning_rule.Momentum(initial_momentum,
nesterov_momentum=True)
if self.lr_monitor_decay:
self.learning_rate_adjustor = MonitorBasedLRAdjuster(
high_trigger=1., shrink_amt=0.9,
low_trigger=.95, grow_amt=1.1, channel_name='train_objective')
elif self.lr_lin_decay:
self.learning_rate_adjustor = LinearDecayOverEpoch(
start, saturate, self.lr_lin_decay)
def create_adjustors(self):
initial_momentum = .5
final_momentum = .99
start = 1
saturate = self.max_epochs
self.momentum_adjustor = learning_rule.MomentumAdjustor(
final_momentum, start, saturate)
self.momentum_rule = learning_rule.Momentum(initial_momentum,
nesterov_momentum=True)
if self.lr_monitor_decay:
self.learning_rate_adjustor = MonitorBasedLRAdjuster(
high_trigger=1.,
shrink_amt=0.9,
low_trigger=.95,
grow_amt=1.1,
channel_name='train_objective')
elif self.lr_lin_decay:
self.learning_rate_adjustor = LinearDecayOverEpoch(
start, saturate, self.lr_lin_decay)
def get_finetuner(model, trainset, batch_size=100, epochs=100):
train_algo = SGD(batch_size=batch_size,
learning_rule=Momentum(init_momentum=0.5),
learning_rate=0.5,
monitoring_batches=batch_size,
monitoring_dataset=trainset,
cost=Dropout(input_include_probs={'h0': .5},
input_scales={'h0': 2.}),
termination_criterion=EpochCounter(epochs))
path = DATA_DIR + 'model' + str(SUBMODEL) + 'saved_daex.pkl'
return Train(model=model,
algorithm=train_algo,
dataset=trainset,
save_path=path,
save_freq=10,
extensions=[
MomentumAdjustor(final_momentum=0.9,
start=0,
saturate=int(epochs * 0.8)),
LinearDecayOverEpoch(start=1,
saturate=int(epochs * 0.7),
decay_factor=.02)
])
def get_trainer2(model, trainset, epochs=50):
train_algo = SGD(
batch_size=bsize,
learning_rate=0.5,
learning_rule=Momentum(init_momentum=0.5),
monitoring_batches=bsize,
monitoring_dataset=trainset,
cost=Dropout(input_include_probs={'h0': .8}, input_scales={'h0': 1.}),
termination_criterion=EpochCounter(epochs),
)
path = DATA_DIR + 'model2saved_conv.pkl'
return Train(model=model,
algorithm=train_algo,
dataset=trainset,
save_path=path,
save_freq=1,
extensions=[
MomentumAdjustor(final_momentum=0.7,
start=0,
saturate=int(epochs * 0.5)),
LinearDecayOverEpoch(start=1,
saturate=int(epochs * 0.8),
decay_factor=.01)
])
def get_trainer(model, trainset, validset, save_path):
monitoring = dict(valid=validset, train=trainset)
termination = MonitorBased(channel_name='valid_y_misclass', prop_decrease=.001, N=100)
extensions = [MonitorBasedSaveBest(channel_name='valid_y_misclass', save_path=save_path),
#MomentumAdjustor(start=1, saturate=100, final_momentum=.9),
LinearDecayOverEpoch(start=1, saturate=200, decay_factor=0.01)]
config = {
'learning_rate': .01,
#'learning_rule': Momentum(0.5),
'learning_rule': RMSProp(),
'train_iteration_mode': 'shuffled_sequential',
'batch_size': 1200,#250,
#'batches_per_iter' : 100,
'monitoring_dataset': monitoring,
'monitor_iteration_mode' : 'shuffled_sequential',
'termination_criterion' : termination,
}
return Train(model=model,
algorithm=SGD(**config),
dataset=trainset,
extensions=extensions)
def test_linear_decay_over_epoch():
# tests that the class LinearDecayOverEpoch in sgd.py
# gets the learning rate properly over the training epochs
# it runs a small softmax and at the end checks the learning values.
# the learning rates are expected to start changing at epoch 'start' by an amount of 'step' specified below.
# the decrease of the learning rate should continue linearly untill we reach epoch 'saturate' at which the learning rate equals 'learning_rate * decay_factor'
dim = 3
m = 10
rng = np.random.RandomState([25, 9, 2012])
X = rng.randn(m, dim)
dataset = DenseDesignMatrix(X=X)
m = 15
X = rng.randn(m, dim)
# including a monitoring datasets lets us test that
# the monitor works with supervised data
monitoring_dataset = DenseDesignMatrix(X=X)
model = SoftmaxModel(dim)
learning_rate = 1e-1
batch_size = 5
# We need to include this so the test actually stops running at some point
epoch_num = 15
termination_criterion = EpochCounter(epoch_num)
cost = DummyCost()
algorithm = SGD(learning_rate,
cost,
batch_size=5,
monitoring_batches=3,
monitoring_dataset=monitoring_dataset,
termination_criterion=termination_criterion,
update_callbacks=None,
init_momentum=None,
set_batch_size=False)
start = 5
saturate = 10
decay_factor = 0.1
linear_decay = LinearDecayOverEpoch(start=start,
saturate=saturate,
decay_factor=decay_factor)
train = Train(dataset,
model,
algorithm,
save_path=None,
save_freq=0,
extensions=[linear_decay])
train.main_loop()
lr = model.monitor.channels['learning_rate']
step = (learning_rate - learning_rate * decay_factor) / (saturate - start +
1)
for i in xrange(epoch_num + 1):
actual = lr.val_record[i]
if i < start:
expected = learning_rate
elif i >= saturate:
expected = learning_rate * decay_factor
elif (start <= i) and (i < saturate):
expected = decay_factor * learning_rate + (saturate - i) * step
if not np.allclose(actual, expected):
raise AssertionError(
"After %d epochs, expected learning rate to be %f, but it is %f."
% (i, actual, expected))
def main():
#creating layers
#2 convolutional rectified layers, border mode valid
batch_size = 64
lr = 0.1 / 20
finMomentum = 0.9
maxout_units = 2000
num_pcs = 4
lay1_reg = lay2_reg = maxout_reg = None
#save_path = './models/no_maxout/titan_lr_0.1_btch_64_momFinal_0.9_maxout_2000_4.joblib'
#best_path = '/models/no_maxout/titan_bart10_gpu2_best.joblib'
#save_path = './models/'+params.host+'_'+params.device+'_'+sys.argv[1]+'.joblib'
#best_path = './models/'+params.host+'_'+params.device+'_'+sys.argv[1]+'best.joblib'
save_path = '/Tmp/zumerjer/eos1_sumcost_nodrop_noada_small_ema.joblib'
best_path = '/Tmp/zumerjer/eos1_sumcost_nodrop_noada_small_ema_best.joblib'
#numBatches = 400000/batch_size
'''
print 'Applying preprocessing'
ddmTrain = EmotiwKeypoints(start=0, stop =40000)
ddmValid = EmotiwKeypoints(start=40000, stop = 44000)
ddmTest = EmotiwKeypoints(start=44000)
stndrdz = preprocessing.Standardize()
stndrdz.applyLazily(ddmTrain, can_fit=True, name = 'train')
stndrdz.applyLazily(ddmValid, can_fit=False, name = 'val')
stndrdz.applyLazily(ddmTest, can_fit=False, name = 'test')
GCN = preprocessing.GlobalContrastNormalization(batch_size = 1000)
GCN.apply(ddmTrain, can_fit =True, name = 'train')
GCN.apply(ddmValid, can_fit =False, name = 'val')
GCN.apply(ddmTest, can_fit = False, name = 'test')
return
'''
ddmTrain = ComboDatasetPyTable('/Tmp/zumerjer/all_', which_set='train')
ddmValid = ComboDatasetPyTable('/Tmp/zumerjer/all_', which_set='valid')
ddmSmallTrain = ComboDatasetPyTable('/Tmp/zumerjer/all_',
which_set='small_train')
layer1 = ConvRectifiedLinear(layer_name='convRect1',
output_channels=64,
irange=.05,
kernel_shape=[5, 5],
pool_shape=[4, 4],
pool_stride=[2, 2],
W_lr_scale=0.1,
max_kernel_norm=lay1_reg)
layer2 = ConvRectifiedLinear(layer_name='convRect2',
output_channels=128,
irange=.05,
kernel_shape=[5, 5],
pool_shape=[3, 3],
pool_stride=[2, 2],
W_lr_scale=0.1,
max_kernel_norm=lay2_reg)
# Rectified linear units
#layer3 = RectifiedLinear(dim = 3000,
# sparse_init = 15,
# layer_name = 'RectLin3')
#Maxout layer
maxout = Maxout(layer_name='maxout',
irange=.005,
num_units=maxout_units,
num_pieces=num_pcs,
W_lr_scale=0.1,
max_col_norm=maxout_reg)
#multisoftmax
n_groups = 196
n_classes = 96
layer_name = 'multisoftmax'
layerMS = MultiSoftmax(n_groups=n_groups,
irange=0.05,
n_classes=n_classes,
layer_name=layer_name)
#setting up MLP0
MLPerc = MLP(batch_size=batch_size,
input_space=Conv2DSpace(shape=[96, 96],
num_channels=3,
axes=('b', 0, 1, 'c')),
layers=[layer1, layer2, maxout, layerMS])
#mlp_cost
missing_target_value = -1
mlp_cost = MLPCost(cost_type='default',
missing_target_value=missing_target_value)
#mlp_cost.setup_dropout(input_include_probs= { 'convRect1' : 0.8 }, input_scales= { 'convRect1': 1. })
#dropout_cost = Dropout(input_include_probs= { 'convRect1' : .8 },
# input_scales= { 'convRect1': 1. })
#algorithm
monitoring_dataset = {'validation': ddmValid, 'mini-train': ddmSmallTrain}
term_crit = MonitorBased(prop_decrease=1e-7,
N=100,
channel_name='validation_objective')
kpSGD = KeypointSGD(learning_rate=lr,
init_momentum=0.5,
monitoring_dataset=monitoring_dataset,
batch_size=batch_size,
termination_criterion=term_crit,
cost=mlp_cost)
#train extension
#train_ext = ExponentialDecayOverEpoch(decay_factor = 0.998, min_lr_scale = 0.001)
train_ext = LinearDecayOverEpoch(start=1, saturate=250, decay_factor=.01)
#train_ext = ADADELTA(0.95)
#train object
train = Train(dataset=ddmTrain,
save_path=save_path,
save_freq=10,
model=MLPerc,
algorithm=kpSGD,
extensions=[
train_ext,
MonitorBasedSaveBest(channel_name='validation_objective',
save_path=best_path),
MomentumAdjustor(start=1,
saturate=25,
final_momentum=finMomentum)
])
train.main_loop()
train.save()
class SequenceTaggerNetwork(Model):
def __init__(self,
dataset,
w2i,
t2i,
featurizer,
edim=None,
hdims=None,
fedim=None,
max_epochs=100,
use_momentum=False,
lr=.01,
lr_lin_decay=None,
lr_scale=False,
lr_monitor_decay=False,
valid_stop=False,
reg_factors=None,
dropout=False,
dropout_params=None,
embedding_init=None,
embedded_model=None,
monitor_train=True,
plot_monitor=None,
num=False):
super(SequenceTaggerNetwork, self).__init__()
self.vocab_size = dataset.vocab_size
self.window_size = dataset.window_size
self.total_feats = dataset.total_feats
self.feat_num = dataset.feat_num
self.n_classes = dataset.n_classes
self.max_epochs = max_epochs
if edim is None:
edim = 50
if hdims is None:
hdims = [100]
if fedim is None:
fedim = 5
self.edim = edim
self.fedim = fedim
self.hdims = hdims
self.w2i = w2i
self.t2i = t2i
self.featurizer = featurizer
self._create_tagger()
A_value = numpy.random.uniform(low=-.1,
high=.1,
size=(self.n_classes + 2,
self.n_classes))
self.A = sharedX(A_value, name='A')
self.use_momentum = use_momentum
self.lr = lr
self.lr_lin_decay = lr_lin_decay
self.lr_monitor_decay = lr_monitor_decay
self.lr_scale = lr_scale
self.valid_stop = valid_stop
self.reg_factors = reg_factors
self.close_cache = {}
self.dropout_params = dropout_params
self.dropout = dropout or self.dropout_params is not None
self.hdims = hdims
self.monitor_train = monitor_train
self.num = num
self.plot_monitor = plot_monitor
if embedding_init is not None:
self.set_embedding_weights(embedding_init)
def _create_tagger(self):
self.tagger = WordTaggerNetwork(self.vocab_size, self.window_size,
self.total_feats, self.feat_num,
self.hdims, self.edim, self.fedim,
self.n_classes)
def _create_data_specs(self, dataset):
self.input_space = CompositeSpace([
dataset.data_specs[0].components[i]
for i in xrange(len(dataset.data_specs[0].components) - 1)
])
self.output_space = dataset.data_specs[0].components[-1]
self.input_source = dataset.data_specs[1][:-1]
self.target_source = dataset.data_specs[1][-1]
def __getstate__(self):
d = {}
d['vocab_size'] = self.vocab_size
d['window_size'] = self.window_size
d['feat_num'] = self.feat_num
d['total_feats'] = self.total_feats
d['n_classes'] = self.n_classes
d['input_space'] = self.input_space
d['output_space'] = self.output_space
d['input_source'] = self.input_source
d['target_source'] = self.target_source
d['A'] = self.A
d['tagger'] = self.tagger
d['w2i'] = self.w2i
d['t2i'] = self.t2i
d['featurizer'] = self.featurizer
d['max_epochs'] = self.max_epochs
d['use_momentum'] = self.use_momentum
d['lr'] = self.lr
d['lr_lin_decay'] = self.lr_lin_decay
d['lr_monitor_decay'] = self.lr_monitor_decay
d['lr_scale'] = self.lr_scale
d['valid_stop'] = self.valid_stop
d['reg_factors'] = self.reg_factors
d['dropout'] = self.dropout
d['dropout_params'] = self.dropout_params
d['monitor_train'] = self.monitor_train
d['num'] = self.num
d['plot_monitor'] = self.plot_monitor
return d
def fprop(self, data):
tagger_out = self.tagger.fprop(data)
probs = T.concatenate([self.A, tagger_out])
return probs
def dropout_fprop(self,
data,
default_input_include_prob=0.5,
input_include_probs=None,
default_input_scale=2.0,
input_scales=None,
per_example=True):
if input_scales is None:
input_scales = {'input': 1.0}
if input_include_probs is None:
input_include_probs = {'input': 1.0}
if self.dropout_params is not None:
if len(self.dropout_params) == len(self.tagger.layers) - 1:
input_include_probs['tagger_out'] = self.dropout_params[-1]
input_scales['tagger_out'] = 1.0 / self.dropout_params[-1]
for i, p in enumerate(self.dropout_params[:-1]):
input_include_probs['h{0}'.format(i)] = p
input_scales['h{0}'.format(i)] = 1.0 / p
tagger_out = self.tagger.dropout_fprop(data,
default_input_include_prob,
input_include_probs,
default_input_scale,
input_scales, per_example)
probs = T.concatenate([self.A, tagger_out])
return probs
@functools.wraps(Model.get_lr_scalers)
def get_lr_scalers(self):
if not self.lr_scale:
return {}
d = self.tagger.get_lr_scalers()
d[self.A] = 1. / self.n_classes
return d
@functools.wraps(Model.get_params)
def get_params(self):
return self.tagger.get_params() + [self.A]
def create_adjustors(self):
initial_momentum = .5
final_momentum = .99
start = 1
saturate = self.max_epochs
self.momentum_adjustor = learning_rule.MomentumAdjustor(
final_momentum, start, saturate)
self.momentum_rule = learning_rule.Momentum(initial_momentum,
nesterov_momentum=True)
if self.lr_monitor_decay:
self.learning_rate_adjustor = MonitorBasedLRAdjuster(
high_trigger=1.,
shrink_amt=0.9,
low_trigger=.95,
grow_amt=1.1,
channel_name='train_objective')
elif self.lr_lin_decay:
self.learning_rate_adjustor = LinearDecayOverEpoch(
start, saturate, self.lr_lin_decay)
def compute_used_inputs(self):
seen = {'words': set(), 'feats': set()}
for sen_w in self.dataset['train'].X1:
seen['words'] |= reduce(lambda x, y: set(x) | set(y), sen_w, set())
for sen_f in self.dataset['train'].X2:
seen['feats'] |= reduce(lambda x, y: set(x) | set(y), sen_f, set())
words = set(xrange(len(self.w2i)))
feats = set(xrange(self.total_feats))
self.notseen = {
'words': numpy.array(sorted(words - seen['words'])),
'feats': numpy.array(sorted(feats - seen['feats']))
}
def set_dataset(self, data):
self._create_data_specs(data['train'])
self.dataset = data
self.compute_used_inputs()
self.tagger.notseen = self.notseen
def create_algorithm(self, data, save_best_path=None):
self.set_dataset(data)
self.create_adjustors()
term = EpochCounter(max_epochs=self.max_epochs)
if self.valid_stop:
cost_crit = MonitorBased(channel_name='valid_objective',
prop_decrease=.0,
N=3)
term = And(criteria=[cost_crit, term])
#(layers, A_weight_decay)
coeffs = None
if self.reg_factors:
rf = self.reg_factors
lhdims = len(self.tagger.hdims)
l_inputlayer = len(self.tagger.layers[0].layers)
coeffs = ([[rf] * l_inputlayer] + ([rf] * lhdims) + [rf], rf)
cost = SeqTaggerCost(coeffs, self.dropout)
self.cost = cost
self.mbsb = MonitorBasedSaveBest(channel_name='valid_objective',
save_path=save_best_path)
mon_dataset = dict(self.dataset)
if not self.monitor_train:
del mon_dataset['train']
_learning_rule = (self.momentum_rule if self.use_momentum else None)
self.algorithm = SGD(
batch_size=1,
learning_rate=self.lr,
termination_criterion=term,
monitoring_dataset=mon_dataset,
cost=cost,
learning_rule=_learning_rule,
)
self.algorithm.setup(self, self.dataset['train'])
if self.plot_monitor:
cn = ["valid_objective", "test_objective"]
if self.monitor_train:
cn.append("train_objective")
plots = Plots(channel_names=cn, save_path=self.plot_monitor)
self.pm = PlotManager([plots], freq=1)
self.pm.setup(self, None, self.algorithm)
def train(self):
while True:
if not self.algorithm.continue_learning(self):
break
self.algorithm.train(dataset=self.dataset['train'])
self.monitor.report_epoch()
self.monitor()
self.mbsb.on_monitor(self, self.dataset['valid'], self.algorithm)
if self.use_momentum:
self.momentum_adjustor.on_monitor(self, self.dataset['valid'],
self.algorithm)
if hasattr(self, 'learning_rate_adjustor'):
self.learning_rate_adjustor.on_monitor(self,
self.dataset['valid'],
self.algorithm)
if hasattr(self, 'pm'):
self.pm.on_monitor(self, self.dataset['valid'], self.algorithm)
def prepare_tagging(self):
X = self.get_input_space().make_theano_batch(batch_size=1)
Y = self.fprop(X)
self.f = theano.function([X[0], X[1]], Y)
self.start = self.A.get_value()[0]
self.end = self.A.get_value()[1]
self.A_value = self.A.get_value()[2:]
def process_input(self, words, feats):
return self.f(words, feats)
def tag_sen(self, words, feats, debug=False, return_probs=False):
if not hasattr(self, 'f'):
self.prepare_tagging()
y = self.process_input(words, feats)
tagger_out = y[2 + self.n_classes:]
res = viterbi(self.start, self.A_value, self.end, tagger_out,
self.n_classes, return_probs)
if return_probs:
return res / res.sum(axis=1)[:, numpy.newaxis]
#return res.reshape((1, len(res)))
if debug:
return numpy.array([[e] for e in res[1]]), tagger_out
return numpy.array([[e] for e in res[1]])
def get_score(self, dataset, mode='pwp'):
self.prepare_tagging()
tagged = (self.tag_sen(w, f) for w, f in izip(dataset.X1, dataset.X2))
gold = dataset.y
good, bad = 0., 0.
if mode == 'pwp':
for t, g in izip(tagged, gold):
g = g.argmax(axis=1)
t = t.flatten()
good += sum(t == g)
bad += sum(t != g)
return [good / (good + bad)]
elif mode == 'f1':
i2t = [t for t, i in sorted(self.t2i.items(), key=lambda x: x[1])]
f1c = FScCounter(i2t, binary_input=False)
gold = map(lambda x: x.argmax(axis=1), gold)
tagged = map(lambda x: x.flatten(), tagged)
return f1c.count_score(gold, tagged)
def set_embedding_weights(self, embedding_init):
# load embedding with gensim
from gensim.models import Word2Vec
try:
m = Word2Vec.load_word2vec_format(embedding_init, binary=False)
edim = m.layer1_size
except UnicodeDecodeError:
try:
m = Word2Vec.load_word2vec_format(embedding_init, binary=True)
edim = m.layer1_size
except UnicodeDecodeError:
# not in word2vec format
m = Word2Vec.load(embedding_init)
edim = m.layer1_size
except ValueError:
# glove model
m = {}
if embedding_init.endswith('gz'):
fp = gzip.open(embedding_init)
else:
fp = open(embedding_init)
for l in fp:
le = l.split()
m[le[0].decode('utf-8')] = numpy.array(
[float(e) for e in le[1:]], dtype=theano.config.floatX)
edim = len(le) - 1
if edim != self.edim:
raise Exception("Embedding dim and edim doesn't match")
m_lower = {}
vocab = (m.vocab if hasattr(m, 'vocab') else m)
for k in vocab:
if k in ['UNKNOWN', 'PADDING']:
continue
if self.num:
m_lower[replace_numerals(k.lower())] = m[k]
else:
m_lower[k.lower()] = m[k]
# transform weight matrix with using self.w2i
params = numpy.zeros(
self.tagger.layers[0].layers[0].get_param_vector().shape,
dtype=theano.config.floatX)
e = self.edim
for w in self.w2i:
if w in m_lower:
v = m_lower[w]
i = self.w2i[w]
params[i * e:(i + 1) * e] = v
if 'UNKNOWN' in vocab:
params[-1 * e:] = vocab['UNKNOWN']
if 'PADDING' in vocab:
params[-2 * e:-1 * e] = vocab['PADDING']
self.tagger.layers[0].layers[0].set_param_vector(params)
class SequenceTaggerNetwork(Model):
def __init__(self, dataset, w2i, t2i, featurizer,
edim=None, hdims=None, fedim=None,
max_epochs=100, use_momentum=False, lr=.01, lr_lin_decay=None,
lr_scale=False, lr_monitor_decay=False,
valid_stop=False, reg_factors=None, dropout=False,
dropout_params=None, embedding_init=None,
embedded_model=None, monitor_train=True, plot_monitor=None,
num=False):
super(SequenceTaggerNetwork, self).__init__()
self.vocab_size = dataset.vocab_size
self.window_size = dataset.window_size
self.total_feats = dataset.total_feats
self.feat_num = dataset.feat_num
self.n_classes = dataset.n_classes
self.max_epochs = max_epochs
if edim is None:
edim = 50
if hdims is None:
hdims = [100]
if fedim is None:
fedim = 5
self.edim = edim
self.fedim = fedim
self.hdims = hdims
self.w2i = w2i
self.t2i = t2i
self.featurizer = featurizer
self._create_tagger()
A_value = numpy.random.uniform(low=-.1, high=.1,
size=(self.n_classes + 2,
self.n_classes))
self.A = sharedX(A_value, name='A')
self.use_momentum = use_momentum
self.lr = lr
self.lr_lin_decay = lr_lin_decay
self.lr_monitor_decay = lr_monitor_decay
self.lr_scale = lr_scale
self.valid_stop = valid_stop
self.reg_factors = reg_factors
self.close_cache = {}
self.dropout_params = dropout_params
self.dropout = dropout or self.dropout_params is not None
self.hdims = hdims
self.monitor_train = monitor_train
self.num = num
self.plot_monitor = plot_monitor
if embedding_init is not None:
self.set_embedding_weights(embedding_init)
def _create_tagger(self):
self.tagger = WordTaggerNetwork(
self.vocab_size, self.window_size, self.total_feats,
self.feat_num, self.hdims, self.edim, self.fedim, self.n_classes)
def _create_data_specs(self, dataset):
self.input_space = CompositeSpace([
dataset.data_specs[0].components[i]
for i in xrange(len(dataset.data_specs[0].components) - 1)])
self.output_space = dataset.data_specs[0].components[-1]
self.input_source = dataset.data_specs[1][:-1]
self.target_source = dataset.data_specs[1][-1]
def __getstate__(self):
d = {}
d['vocab_size'] = self.vocab_size
d['window_size'] = self.window_size
d['feat_num'] = self.feat_num
d['total_feats'] = self.total_feats
d['n_classes'] = self.n_classes
d['input_space'] = self.input_space
d['output_space'] = self.output_space
d['input_source'] = self.input_source
d['target_source'] = self.target_source
d['A'] = self.A
d['tagger'] = self.tagger
d['w2i'] = self.w2i
d['t2i'] = self.t2i
d['featurizer'] = self.featurizer
d['max_epochs'] = self.max_epochs
d['use_momentum'] = self.use_momentum
d['lr'] = self.lr
d['lr_lin_decay'] = self.lr_lin_decay
d['lr_monitor_decay'] = self.lr_monitor_decay
d['lr_scale'] = self.lr_scale
d['valid_stop'] = self.valid_stop
d['reg_factors'] = self.reg_factors
d['dropout'] = self.dropout
d['dropout_params'] = self.dropout_params
d['monitor_train'] = self.monitor_train
d['num'] = self.num
d['plot_monitor'] = self.plot_monitor
return d
def fprop(self, data):
tagger_out = self.tagger.fprop(data)
probs = T.concatenate([self.A, tagger_out])
return probs
def dropout_fprop(self, data, default_input_include_prob=0.5,
input_include_probs=None, default_input_scale=2.0,
input_scales=None, per_example=True):
if input_scales is None:
input_scales = {'input': 1.0}
if input_include_probs is None:
input_include_probs = {'input': 1.0}
if self.dropout_params is not None:
if len(self.dropout_params) == len(self.tagger.layers) - 1:
input_include_probs['tagger_out'] = self.dropout_params[-1]
input_scales['tagger_out'] = 1.0/self.dropout_params[-1]
for i, p in enumerate(self.dropout_params[:-1]):
input_include_probs['h{0}'.format(i)] = p
input_scales['h{0}'.format(i)] = 1.0/p
tagger_out = self.tagger.dropout_fprop(
data, default_input_include_prob, input_include_probs,
default_input_scale, input_scales, per_example)
probs = T.concatenate([self.A, tagger_out])
return probs
@functools.wraps(Model.get_lr_scalers)
def get_lr_scalers(self):
if not self.lr_scale:
return {}
d = self.tagger.get_lr_scalers()
d[self.A] = 1. / self.n_classes
return d
@functools.wraps(Model.get_params)
def get_params(self):
return self.tagger.get_params() + [self.A]
def create_adjustors(self):
initial_momentum = .5
final_momentum = .99
start = 1
saturate = self.max_epochs
self.momentum_adjustor = learning_rule.MomentumAdjustor(
final_momentum, start, saturate)
self.momentum_rule = learning_rule.Momentum(initial_momentum,
nesterov_momentum=True)
if self.lr_monitor_decay:
self.learning_rate_adjustor = MonitorBasedLRAdjuster(
high_trigger=1., shrink_amt=0.9,
low_trigger=.95, grow_amt=1.1, channel_name='train_objective')
elif self.lr_lin_decay:
self.learning_rate_adjustor = LinearDecayOverEpoch(
start, saturate, self.lr_lin_decay)
def compute_used_inputs(self):
seen = {'words': set(), 'feats': set()}
for sen_w in self.dataset['train'].X1:
seen['words'] |= reduce(
lambda x, y: set(x) | set(y),
sen_w, set())
for sen_f in self.dataset['train'].X2:
seen['feats'] |= reduce(
lambda x, y: set(x) | set(y),
sen_f, set())
words = set(xrange(len(self.w2i)))
feats = set(xrange(self.total_feats))
self.notseen = {
'words': numpy.array(sorted(words - seen['words'])),
'feats': numpy.array(sorted(feats - seen['feats']))
}
def set_dataset(self, data):
self._create_data_specs(data['train'])
self.dataset = data
self.compute_used_inputs()
self.tagger.notseen = self.notseen
def create_algorithm(self, data, save_best_path=None):
self.set_dataset(data)
self.create_adjustors()
term = EpochCounter(max_epochs=self.max_epochs)
if self.valid_stop:
cost_crit = MonitorBased(channel_name='valid_objective',
prop_decrease=.0, N=3)
term = And(criteria=[cost_crit, term])
#(layers, A_weight_decay)
coeffs = None
if self.reg_factors:
rf = self.reg_factors
lhdims = len(self.tagger.hdims)
l_inputlayer = len(self.tagger.layers[0].layers)
coeffs = ([[rf] * l_inputlayer] + ([rf] * lhdims) + [rf], rf)
cost = SeqTaggerCost(coeffs, self.dropout)
self.cost = cost
self.mbsb = MonitorBasedSaveBest(channel_name='valid_objective',
save_path=save_best_path)
mon_dataset = dict(self.dataset)
if not self.monitor_train:
del mon_dataset['train']
_learning_rule = (self.momentum_rule if self.use_momentum else None)
self.algorithm = SGD(batch_size=1, learning_rate=self.lr,
termination_criterion=term,
monitoring_dataset=mon_dataset,
cost=cost,
learning_rule=_learning_rule,
)
self.algorithm.setup(self, self.dataset['train'])
if self.plot_monitor:
cn = ["valid_objective", "test_objective"]
if self.monitor_train:
cn.append("train_objective")
plots = Plots(channel_names=cn, save_path=self.plot_monitor)
self.pm = PlotManager([plots], freq=1)
self.pm.setup(self, None, self.algorithm)
def train(self):
while True:
if not self.algorithm.continue_learning(self):
break
self.algorithm.train(dataset=self.dataset['train'])
self.monitor.report_epoch()
self.monitor()
self.mbsb.on_monitor(self, self.dataset['valid'], self.algorithm)
if self.use_momentum:
self.momentum_adjustor.on_monitor(self, self.dataset['valid'],
self.algorithm)
if hasattr(self, 'learning_rate_adjustor'):
self.learning_rate_adjustor.on_monitor(
self, self.dataset['valid'], self.algorithm)
if hasattr(self, 'pm'):
self.pm.on_monitor(
self, self.dataset['valid'], self.algorithm)
def prepare_tagging(self):
X = self.get_input_space().make_theano_batch(batch_size=1)
Y = self.fprop(X)
self.f = theano.function([X[0], X[1]], Y)
self.start = self.A.get_value()[0]
self.end = self.A.get_value()[1]
self.A_value = self.A.get_value()[2:]
def process_input(self, words, feats):
return self.f(words, feats)
def tag_sen(self, words, feats, debug=False, return_probs=False):
if not hasattr(self, 'f'):
self.prepare_tagging()
y = self.process_input(words, feats)
tagger_out = y[2 + self.n_classes:]
res = viterbi(self.start, self.A_value, self.end, tagger_out,
self.n_classes, return_probs)
if return_probs:
return res / res.sum(axis=1)[:,numpy.newaxis]
#return res.reshape((1, len(res)))
if debug:
return numpy.array([[e] for e in res[1]]), tagger_out
return numpy.array([[e] for e in res[1]])
def get_score(self, dataset, mode='pwp'):
self.prepare_tagging()
tagged = (self.tag_sen(w, f) for w, f in
izip(dataset.X1, dataset.X2))
gold = dataset.y
good, bad = 0., 0.
if mode == 'pwp':
for t, g in izip(tagged, gold):
g = g.argmax(axis=1)
t = t.flatten()
good += sum(t == g)
bad += sum(t != g)
return [good / (good + bad)]
elif mode == 'f1':
i2t = [t for t, i in sorted(self.t2i.items(), key=lambda x: x[1])]
f1c = FScCounter(i2t, binary_input=False)
gold = map(lambda x:x.argmax(axis=1), gold)
tagged = map(lambda x:x.flatten(), tagged)
return f1c.count_score(gold, tagged)
def set_embedding_weights(self, embedding_init):
# load embedding with gensim
from gensim.models import Word2Vec
try:
m = Word2Vec.load_word2vec_format(embedding_init, binary=False)
edim = m.layer1_size
except UnicodeDecodeError:
try:
m = Word2Vec.load_word2vec_format(embedding_init, binary=True)
edim = m.layer1_size
except UnicodeDecodeError:
# not in word2vec format
m = Word2Vec.load(embedding_init)
edim = m.layer1_size
except ValueError:
# glove model
m = {}
if embedding_init.endswith('gz'):
fp = gzip.open(embedding_init)
else:
fp = open(embedding_init)
for l in fp:
le = l.split()
m[le[0].decode('utf-8')] = numpy.array(
[float(e) for e in le[1:]], dtype=theano.config.floatX)
edim = len(le) - 1
if edim != self.edim:
raise Exception("Embedding dim and edim doesn't match")
m_lower = {}
vocab = (m.vocab if hasattr(m, 'vocab') else m)
for k in vocab:
if k in ['UNKNOWN', 'PADDING']:
continue
if self.num:
m_lower[replace_numerals(k.lower())] = m[k]
else:
m_lower[k.lower()] = m[k]
# transform weight matrix with using self.w2i
params = numpy.zeros(
self.tagger.layers[0].layers[0].get_param_vector().shape, dtype=theano.config.floatX)
e = self.edim
for w in self.w2i:
if w in m_lower:
v = m_lower[w]
i = self.w2i[w]
params[i*e:(i+1)*e] = v
if 'UNKNOWN' in vocab:
params[-1*e:] = vocab['UNKNOWN']
if 'PADDING' in vocab:
params[-2*e:-1*e] = vocab['PADDING']
self.tagger.layers[0].layers[0].set_param_vector(params)
def train(d=None):
train_X = np.array(d.train_X)
train_y = np.array(d.train_Y)
valid_X = np.array(d.valid_X)
valid_y = np.array(d.valid_Y)
test_X = np.array(d.test_X)
test_y = np.array(d.test_Y)
nb_classes = len(np.unique(train_y))
train_y = convert_one_hot(train_y)
valid_y = convert_one_hot(valid_y)
# train_set = RotationalDDM(X=train_X, y=train_y)
train_set = DenseDesignMatrix(X=train_X, y=train_y)
valid_set = DenseDesignMatrix(X=valid_X, y=valid_y)
print 'Setting up'
batch_size = 100
c0 = mlp.ConvRectifiedLinear(
layer_name='c0',
output_channels=64,
irange=.05,
kernel_shape=[5, 5],
pool_shape=[4, 4],
pool_stride=[2, 2],
# W_lr_scale=0.25,
max_kernel_norm=1.9365)
c1 = mlp.ConvRectifiedLinear(
layer_name='c1',
output_channels=64,
irange=.05,
kernel_shape=[5, 5],
pool_shape=[4, 4],
pool_stride=[2, 2],
# W_lr_scale=0.25,
max_kernel_norm=1.9365)
c2 = mlp.ConvRectifiedLinear(
layer_name='c2',
output_channels=64,
irange=.05,
kernel_shape=[5, 5],
pool_shape=[4, 4],
pool_stride=[5, 4],
W_lr_scale=0.25,
# max_kernel_norm=1.9365
)
sp0 = mlp.SoftmaxPool(
detector_layer_dim=16,
layer_name='sp0',
pool_size=4,
sparse_init=512,
)
sp1 = mlp.SoftmaxPool(
detector_layer_dim=16,
layer_name='sp1',
pool_size=4,
sparse_init=512,
)
r0 = mlp.RectifiedLinear(
layer_name='r0',
dim=512,
sparse_init=512,
)
r1 = mlp.RectifiedLinear(
layer_name='r1',
dim=512,
sparse_init=512,
)
s0 = mlp.Sigmoid(
layer_name='s0',
dim=500,
# max_col_norm=1.9365,
sparse_init=15,
)
out = mlp.Softmax(
n_classes=nb_classes,
layer_name='output',
irange=.0,
# max_col_norm=1.9365,
# sparse_init=nb_classes,
)
epochs = EpochCounter(100)
layers = [s0, out]
decay_coeffs = [.00005, .00005, .00005]
in_space = Conv2DSpace(
shape=[d.size, d.size],
num_channels=1,
)
vec_space = VectorSpace(d.size**2)
nn = mlp.MLP(
layers=layers,
# input_space=in_space,
nvis=d.size**2,
# batch_size=batch_size,
)
trainer = sgd.SGD(
learning_rate=0.01,
# cost=SumOfCosts(costs=[
# dropout.Dropout(),
# MethodCost(method='cost_from_X'),
# WeightDecay(decay_coeffs),
# ]),
# cost=MethodCost(method='cost_from_X'),
batch_size=batch_size,
# train_iteration_mode='even_shuffled_sequential',
termination_criterion=epochs,
# learning_rule=learning_rule.Momentum(init_momentum=0.5),
)
trainer = bgd.BGD(
batch_size=10000,
line_search_mode='exhaustive',
conjugate=1,
updates_per_batch=10,
termination_criterion=epochs,
)
lr_adjustor = LinearDecayOverEpoch(
start=1,
saturate=10,
decay_factor=.1,
)
momentum_adjustor = learning_rule.MomentumAdjustor(
final_momentum=.99,
start=1,
saturate=10,
)
trainer.setup(nn, train_set)
print 'Learning'
test_X = vec_space.np_format_as(test_X, nn.get_input_space())
train_X = vec_space.np_format_as(train_X, nn.get_input_space())
i = 0
X = nn.get_input_space().make_theano_batch()
Y = nn.fprop(X)
predict = theano.function([X], Y)
best = -40
best_iter = -1
while trainer.continue_learning(nn):
print '--------------'
print 'Training Epoch ' + str(i)
trainer.train(dataset=train_set)
nn.monitor()
print 'Evaluating...'
predictions = convert_categorical(predict(train_X[:2000]))
score = accuracy_score(convert_categorical(train_y[:2000]),
predictions)
print 'Score on train: ' + str(score)
predictions = convert_categorical(predict(test_X))
score = accuracy_score(test_y, predictions)
print 'Score on test: ' + str(score)
best, best_iter = (best, best_iter) if best > score else (score, i)
print 'Current best: ' + str(best) + ' at iter ' + str(best_iter)
print classification_report(test_y, predictions)
print 'Adjusting parameters...'
# momentum_adjustor.on_monitor(nn, valid_set, trainer)
# lr_adjustor.on_monitor(nn, valid_set, trainer)
i += 1
print ' '