import keras.backend as K
train_y = np.array(train_y, dtype=K.floatx())
dev_y = np.array(dev_y, dtype=K.floatx())
test_y = np.array(test_y, dtype=K.floatx())
if args.prompt_id != None:
train_pmt = np.array(train_pmt, dtype='int32')
dev_pmt = np.array(dev_pmt, dtype='int32')
test_pmt = np.array(test_pmt, dtype='int32')
# mfe: most frequent elements
# bincounts: dict objects. each counter stores the frequency of each elements for each column.
# Not so useful here. No idea if anywhere else use this function (!!!!!TO CONFIRM!!!!!)
# Here is used to count the distribution of scores.
bincounts, mfe_list = U.bincounts(train_y)
with open('%s/bincounts.txt' % out_dir, 'w') as output_file:
for bincount in bincounts:
output_file.write(str(bincount) + '\n')
logger.info('Statistics:')
# !!!!! This part is unused !!!!!
train_mean = train_y.mean(axis=0)
train_std = train_y.std(axis=0)
dev_mean = dev_y.mean(axis=0)
dev_std = dev_y.std(axis=0)
test_mean = test_y.mean(axis=0)
test_std = test_y.std(axis=0)
logger.info(' train_y mean: %s, stdev: %s, MFC: %s' %
(str(train_mean), str(train_std), str(mfe_list)))
# !!!!! This part is unused !!!!!
def train(args):
out_dir = args.out_dir_path
U.mkdir_p(out_dir + '/preds')
timestr = U.set_logger(onscreen=args.onscreen, out_dir=out_dir)
U.print_args(args)
# assert args.model_type in {'mlp', 'cls', 'clsp', 'reg', 'regp', 'breg', 'bregp'}
assert args.model_type in {'cls', 'reg'}
assert args.algorithm in {
'rmsprop', 'sgd', 'adagrad', 'adadelta', 'adam', 'adamax'
}
assert args.loss in {'mse', 'mae', 'cnp', 'hng'}
assert args.recurrent_unit in {'lstm', 'gru', 'simple'}
assert args.aggregation in {'mot', 'att'}
if args.seed > 0:
np.random.seed(args.seed)
from nea.asap_evaluator import Evaluator
import nea.asap_reader as dataset
###############################################################################################################################
## Prepare data
#
from keras.preprocessing import sequence
if args.valid_split > 0:
(train_x, train_y,
train_pmt), (test_x, test_y,
test_pmt), vocab, overal_maxlen = dataset.get_data(
(args.train_path, args.test_path),
args.prompt_id,
args.vocab_size,
args.maxlen,
tokenize_text=True,
to_lower=True,
sort_by_len=False,
vocab_path=args.vocab_path)
else:
# data_x is a list of lists
(train_x, train_y, train_pmt), (dev_x, dev_y, dev_pmt), (
test_x, test_y, test_pmt), vocab, overal_maxlen = dataset.get_data(
(args.train_path, args.dev_path, args.test_path),
args.prompt_id,
args.vocab_size,
args.maxlen,
tokenize_text=True,
to_lower=True,
sort_by_len=False,
vocab_path=args.vocab_path)
if args.pre_train_path:
if args.valid_split == 0:
args.valid_split = 0.2
(pre_train_x, pre_train_y,
pre_train_pmt), _, _, pre_overal_maxlen = dataset.get_data(
(args.pre_train_path, args.test_path),
args.prompt_id,
args.vocab_size,
args.maxlen,
tokenize_text=True,
to_lower=True,
sort_by_len=False,
vocab_path=args.vocab_path)
overal_maxlen = max(overal_maxlen, pre_overal_maxlen)
if args.tfidf > 0:
train_pca, TfIdf, Pca = dataset.get_tfidf(args.train_path,
args.prompt_id,
pca_dim=args.tfidf,
training_material=True)
if args.valid_split == 0:
dev_pca, _, _ = dataset.get_tfidf(args.dev_path,
args.prompt_id,
pca_dim=args.tfidf,
tfidf=TfIdf,
pca=Pca,
training_material=False)
test_pca, _, _ = dataset.get_tfidf(args.test_path,
args.prompt_id,
pca_dim=args.tfidf,
tfidf=TfIdf,
pca=Pca,
training_material=False)
else:
dev_pca = None
test_pca = None
if args.features:
train_ftr = dataset.get_features(args.train_path,
args.train_feature_path,
args.prompt_id)
if args.valid_split == 0:
valid_ftr = dataset.get_features(args.dev_path,
args.dev_feature_path,
args.prompt_id)
test_ftr = dataset.get_features(args.test_path, args.test_feature_path,
args.prompt_id)
else:
test_ftr = None
if not args.vocab_path:
# Dump vocab
with open(out_dir + '/vocab.pkl', 'wb') as vocab_file:
pk.dump(vocab, vocab_file)
# Pad sequences for mini-batch processing
# if args.model_type in {'breg', 'bregp', 'clsp', 'cls', 'mlp'}:
# assert args.rnn_dim > 0
# assert args.recurrent_unit == 'lstm'
train_x = sequence.pad_sequences(train_x, maxlen=overal_maxlen)
if args.valid_split == 0:
dev_x = sequence.pad_sequences(dev_x, maxlen=overal_maxlen)
if args.pre_train_path:
pre_train_x = sequence.pad_sequences(pre_train_x, maxlen=overal_maxlen)
test_x = sequence.pad_sequences(test_x, maxlen=overal_maxlen)
# else:
# train_x = sequence.pad_sequences(train_x)
# dev_x = sequence.pad_sequences(dev_x)
# test_x = sequence.pad_sequences(test_x)
###############################################################################################################################
## Some statistics
#
import keras.backend as K
train_y = np.array(train_y, dtype=K.floatx())
if args.valid_split == 0:
dev_y = np.array(dev_y, dtype=K.floatx())
if args.pre_train_path:
pre_train_y = np.array(pre_train_y, dtype=K.floatx())
test_y = np.array(test_y, dtype=K.floatx())
if args.prompt_id >= 0:
train_pmt = np.array(train_pmt, dtype='int32')
if args.valid_split == 0:
dev_pmt = np.array(dev_pmt, dtype='int32')
test_pmt = np.array(test_pmt, dtype='int32')
# count score distribution
bincounts, mfs_list = U.bincounts(train_y)
with open('%s/bincounts.txt' % out_dir, 'w') as output_file:
for bincount in bincounts:
output_file.write(str(bincount) + '\n')
train_mean = train_y.mean(axis=0)
train_std = train_y.std(axis=0)
train_max = train_y.max(axis=0)
train_min = train_y.min(axis=0)
# dev_mean = dev_y.mean(axis=0)
# dev_std = dev_y.std(axis=0)
# test_mean = test_y.mean(axis=0)
# test_std = test_y.std(axis=0)
logger.info('Statistics:')
logger.info(' train_x shape: ' + str(np.array(train_x).shape))
if args.valid_split == 0:
logger.info(' dev_x shape: ' + str(np.array(dev_x).shape))
logger.info(' test_x shape: ' + str(np.array(test_x).shape))
logger.info(' train_y shape: ' + str(train_y.shape))
if args.valid_split == 0:
logger.info(' dev_y shape: ' + str(dev_y.shape))
logger.info(' test_y shape: ' + str(test_y.shape))
logger.info(
' train_y max: %d, min: %d, mean: %.2f, stdev: %.3f, MFC: %s' %
(train_max, train_min, train_mean, train_std, str(mfs_list)))
logger.info(' train_y statistic: %s' % (str(bincounts[0]), ))
# We need the dev and test sets in the original scale for evaluation
# if args.valid_split == 0:
# dev_y_org = dev_y.astype(dataset.get_ref_dtype())
test_y_org = test_y.astype(dataset.get_ref_dtype())
if "reg" in args.model_type:
if args.normalize:
logger.info(' normalize score to range (0,1)')
# Convert scores to boundary of [0 1] for training and evaluation (loss calculation)
train_y = dataset.get_model_friendly_scores(train_y, train_pmt)
if args.valid_split == 0:
dev_y = dataset.get_model_friendly_scores(dev_y, dev_pmt)
test_y = dataset.get_model_friendly_scores(test_y, test_pmt)
else:
logger.info(' covert train_y to one hot shape')
assert len(bincounts) == 1, "support only one y value"
categ = int(max(bincounts[0].keys())) + 1
if args.pre_train_path:
categ = 5
# covert to np array to minus 1 to get zero based value
train_y = to_categorical(train_y, categ)
if args.valid_split == 0:
dev_y = to_categorical(dev_y, categ)
if args.pre_train_path:
pre_train_y = to_categorical(pre_train_y, categ)
test_y = to_categorical(test_y, categ)
###############################################################################################################################
## Optimizer algorithm
#
from nea.optimizers import get_optimizer
optimizer = get_optimizer(args)
###############################################################################################################################
## Building model
#
if "reg" in args.model_type:
logger.info(' use regression model')
final_categ = train_y.mean(axis=0)
if args.loss == 'mae':
loss = 'mean_absolute_error'
metric = 'mean_squared_error'
elif args.loss == 'mse':
loss = 'mean_squared_error'
metric = 'mean_absolute_error'
else:
raise NotImplementedError
else:
logger.info(' use classification model')
final_categ = categ
if args.loss == 'cnp':
loss = 'categorical_crossentropy'
metric = 'categorical_accuracy'
elif args.loss == 'hng':
loss = 'hinge'
metric = 'squared_hinge'
else:
raise NotImplementedError
from nea.models import create_model
model = create_model(args, final_categ, overal_maxlen, vocab)
model.compile(loss=loss, optimizer=optimizer, metrics=[metric])
if args.onscreen: model.summary()
###############################################################################################################################
## Plotting model
#
from keras.utils.visualize_util import plot
plot(model, to_file=out_dir + '/' + timestr + 'model_plot.png')
###############################################################################################################################
## Save model architecture
#
logger.info('Saving model architecture')
with open(out_dir + '/' + timestr + 'model_config.json', 'w') as arch:
arch.write(model.to_json(indent=2))
logger.info(' Done')
###############################################################################################################################
## Initialize Evaluator
#
evl = Evaluator(args,
out_dir,
timestr,
metric,
test_x,
test_y,
test_y_org,
test_pmt,
test_pca=test_pca,
test_ftr=test_ftr)
earlystop = EarlyStopping(patience=args.earlystop, verbose=1, mode='auto')
###############################################################################################################################
## Training
#
logger.info(
'------------------------------------------------------------------------------------------'
)
logger.info('Initial Evaluation:')
evl.eval(model, -1, print_info=True)
model_train_x = [
train_x,
]
if not args.valid_split:
model_dev_x = [
dev_x,
]
if args.tfidf > 0:
model_train_x.append(train_pca)
if not args.valid_split:
model_dev_x.append(dev_pca)
if args.features:
model_train_x.append(train_ftr)
if not args.valid_split:
model_dev_x.append(valid_ftr)
if args.pre_train_path:
model.fit(pre_train_x,
pre_train_y,
validation_split=0.12,
batch_size=args.batch_size,
nb_epoch=args.pre_epochs,
verbose=args.verbose,
callbacks=[earlystop, evl])
if args.valid_split > 0:
model.fit(model_train_x,
train_y,
validation_split=args.valid_split,
batch_size=args.batch_size,
nb_epoch=args.epochs,
verbose=args.verbose,
callbacks=[earlystop, evl])
else:
model.fit(model_train_x,
train_y,
validation_data=(model_dev_x, dev_y),
batch_size=args.batch_size,
nb_epoch=args.epochs,
verbose=args.verbose,
callbacks=[earlystop, evl])
return evl.print_final_info()