def get_nn_model(token_dict_size):
_logger.info('Initializing NN model with the following params:')
_logger.info('Input dimension: %s (token vector size)' % TOKEN_REPRESENTATION_SIZE)
_logger.info('Hidden dimension: %s' % HIDDEN_LAYER_DIMENSION)
_logger.info('Output dimension: %s (token dict size)' % token_dict_size)
_logger.info('Input seq length: %s ' % INPUT_SEQUENCE_LENGTH)
_logger.info('Output seq length: %s ' % MAX_NORMALIZED_TOKEN_LENGTH)
_logger.info('Batch size: %s' % SAMPLES_BATCH_SIZE)
model = Sequential()
seq2seq = SimpleSeq2Seq(
input_dim=TOKEN_REPRESENTATION_SIZE,
input_length=INPUT_SEQUENCE_LENGTH,
hidden_dim=HIDDEN_LAYER_DIMENSION,
output_dim=token_dict_size,
output_length=MAX_NORMALIZED_TOKEN_LENGTH,
depth=1
)
model.add(seq2seq)
model.compile(loss='categorical_crossentropy', optimizer='rmsprop')
# use previously saved model if it exists
_logger.info('Looking for a model %s' % NN_MODEL_PATH)
if os.path.isfile(NN_MODEL_PATH):
_logger.info('Loading previously calculated weights...')
model.load_weights(NN_MODEL_PATH)
_logger.info('Model is built')
return model
def train(self, train_names, train_codes, hyperparams, pct_train=0.8, lr=0.01, num_epoch=100):
if self.model_name == 'SimpleSeq2Seq' or self.model_name == 'AttentionSeq2Seq':
train_name, train_code, val_name, val_code, naming_data, hyperparams['n_tokens'] = trainModel.split_data(train_names, train_codes, hyperparams['output_length'], hyperparams['input_length'], pct_train)
hyperparams['is_embedding'] = False
train_name = trainModel.one_hot_name(train_name, hyperparams['n_tokens'])
required_params = ['output_dim', 'output_length', 'input_length', 'is_embedding', 'n_tokens']
for param in required_params:
assert param in hyperparams, (param)
if self.model_name == 'SimpleSeq2Seq':
model = SimpleSeq2Seq(**hyperparams)
elif self.model_name == 'AttentionSeq2Seq':
model = AttentionSeq2Seq(**hyperparams)
elif self.model_name == 'Seq2Seq':
model = Seq2Seq(**hyperparams)
else:
raise TypeError
my_adam = optimizers.Adam(lr=lr, beta_1=0.9, beta_2=0.999, epsilon=1e-08)
model.compile(optimizer=my_adam, loss='categorical_crossentropy')
print ('fit...')
model.fit(train_code, train_name, epochs=num_epoch)
print ('predict...')
predict_probs = model.predict(val_code)
predict_idx = np.argmax(predict_probs, axis=2)
print('evaluate...')
exact_match, _ = trainModel.exact_match(naming_data, predict_idx, val_name)
precision, recall, f1, _, _ = trainModel.evaluate_tokens(naming_data, predict_idx, val_name)
return model, exact_match, precision, recall, f1, naming_data
def createModel():
model = SimpleSeq2Seq(input_dim=112,
output_length=1,
output_dim=5,
depth=1)
model.compile(loss='mse', optimizer='rmsprop')
return model
def main(args):
if len(args) < 1:
sys.stderr.write("Error - one required argument: <data directory>\n")
sys.exit(-1)
working_dir = args[0]
data_file = os.path.join(working_dir, 'thyme_relational_onePathsBetweenArgs.txt')
sys.stderr.write("loading data file...\n")
# learn alphabet from training data
provider = dataset_noLabel.DatasetProvider(data_file)
# now load training examples and labels
train_x = provider.load(data_file)
sys.stderr.write("finished loading data file...\n")
# turn x into numpy array among other things
maxlen = max([len(seq) for seq in train_x])
train_x =[x[0:maxlen] for x in train_x]
train_x = pad_sequences(train_x, maxlen=maxlen)
# prepare embedding matrix
nb_words = len(provider.word2int)
train_y = np.zeros((train_x.shape[0], maxlen, nb_words), dtype=np.bool)
inst = 0
for x in train_x:
train_y[inst, 0, x[0]]=1
train_y[inst, 1, x[1]]=1
inst=inst+1
pickle.dump(maxlen, open(os.path.join(working_dir, 's2s_maxlen.p'),"wb"))
pickle.dump(provider.word2int, open(os.path.join(working_dir, 's2s_word2int.p'),"wb"))
#pickle.dump(nb_words, open(os.path.join(working_dir, 'wd_nb_words.p'),"wb"))
#pickle.dump(train_x, open(os.path.join(working_dir, 'train_x.p'),"wb"))
sys.stderr.write("training encoder...\n")
model = Sequential()
model.add(Embedding(len(provider.word2int),
EMBEDDING_DIM,
input_length=maxlen,
weights=None))
seq2seq = SimpleSeq2Seq(
input_dim=EMBEDDING_DIM,
input_length=maxlen,
hidden_dim=10,
output_dim=nb_words,
output_length=maxlen,
depth=1)
model.add(seq2seq)
model.compile(optimizer='RMSprop', loss='mse')
model.fit(train_x,train_y, batch_size=50, nb_epoch=3)
json_string = model.to_json()
open(os.path.join(working_dir, 's2s_encoder_0.json'), 'w').write(json_string)
model.save_weights(os.path.join(working_dir, 's2s_encoder_0.h5'), overwrite=True)
def train(self, input_file, pct_train=0.65, pct_val=0.05, pct_test=0.3):
assert self.parameters == None, ("The model has already been trained!")
assert "input_length" in self.hyperparameters, ('input_length')
train_data, val_data, test_data, self.naming_data = DataGenerator.get_data_for_simple_seq2seq_with_validation_and_test(
input_file, self.hyperparameters['output_length'],
self.hyperparameters['input_length'], pct_train, pct_val, pct_test)
train_name, train_code = train_data
val_name, val_code = val_data
self.test_name, self.test_code = test_data
self.hyperparameters[
'n_tokens'] = self.naming_data.all_tokens_dictionary.get_n_tokens(
)
def one_hot_name(names, max_name_size, name_dim):
X = np.zeros((len(names), max_name_size, name_dim))
for i, name in enumerate(names):
for j, token in enumerate(name):
X[i, j, token] = 1.0
return X
train_name = one_hot_name(train_name,
self.hyperparameters['output_length'],
self.hyperparameters['n_tokens'])
print('n_tokens: ', self.hyperparameters['n_tokens'])
with open('train_name.txt', 'w') as f:
f.write(str(train_name))
model = SimpleSeq2Seq(**self.hyperparameters)
my_rms = optimizers.RMSprop(lr=0.0001, rho=0.9, epsilon=1e-06)
my_adam = optimizers.Adam(lr=0.001,
beta_1=0.9,
beta_2=0.999,
epsilon=1e-08)
model.compile(optimizer=my_adam, loss='categorical_crossentropy')
self.model = model
print('fit...')
model.fit(train_code, train_name, epochs=20)
print('predict...')
predict_probs = model.predict(val_code)
print('predict_probs.shape: ', predict_probs.shape)
predict_idx = np.argmax(predict_probs, axis=2)
print('predict_idx.shape: ', predict_idx.shape)
print('Exact match evaluate...')
exact_match_accuracy = self.exact_match(predict_idx, val_name)
print('exact_match_accuracy: ', exact_match_accuracy)
suggestions = self.show_names(predict_idx)
original_names = self.show_names(val_name)
with open('suggestions.txt', 'w') as f:
for i in range(len(suggestions)):
f.write('original name: ' + str(original_names[i]) + '\n')
f.write('suggestions: ' + str(suggestions[i]) + '\n')
f.write('\n')
def simple_s2s(input_length, input_dim, output_length, output_dim, hidden_dim, depth, dropout=0.0):
model = SimpleSeq2Seq(
input_shape=(input_length, input_dim),
hidden_dim=hidden_dim,
output_length=output_length,
output_dim=output_dim,
depth=depth,
dropout=dropout
)
model.compile(loss='categorical_crossentropy', optimizer='rmsprop')
return model
def simple_seq2seq_model(input_dim, hidden_dim, output_length, output_dim, input_length):
model = Sequential()
model_seq = SimpleSeq2Seq(input_dim=input_dim, hidden_dim=hidden_dim,
output_length=output_length, output_dim=output_dim,
input_length=input_length, readout_activation='softmax')
model.add(model_seq)
model.add(TimeDistributed(Dense(output_dim)))
model.add(Activation('softmax'))
model.compile(loss='categorical_crossentropy', optimizer='rmsprop')
#model.compile(loss='categorical_crossentropy', optimizer='rmsprop')
return model
def test_SimpleSeq2Seq():
x = np.random.random((samples, input_length, input_dim))
y = np.random.random((samples, output_length, output_dim))
models = []
models += [
SimpleSeq2Seq(output_dim=output_dim,
hidden_dim=hidden_dim,
output_length=output_length,
input_shape=(input_length, input_dim))
]
models += [
SimpleSeq2Seq(output_dim=output_dim,
hidden_dim=hidden_dim,
output_length=output_length,
input_shape=(input_length, input_dim),
depth=2)
]
for model in models:
model.compile(loss='mse', optimizer='sgd')
model.fit(x, y, nb_epoch=1)
def model_2(input_length, output_length, vocab_size, hidden_size=256):
model = Sequential()
model.add(SimpleSeq2Seq(
input_dim=vocab_size,
input_length=input_length,
output_length=output_length,
output_dim=vocab_size,
hidden_dim=hidden_size,
))
model.add(Dense(output_length * vocab_size))
model.add(Reshape((output_length, vocab_size)))
model.add(TimeDistributed(Dense(vocab_size, activation='softmax')))
return model
def mnist_test():
# Load the dataset
f = open('../../mnist.pkl', 'r')
train_set, valid_set, test_set = cPickle.load(f)
print(train_set[0].shape)
model = SimpleSeq2Seq(input_dim=28, output_dim=28, output_length=28)
model.compile(loss='mse', optimizer='rmsprop')
X = train_set[0].reshape(50000, 28, 28)
# a = model.layers[0].get_weights()
# print model.layers[0].set_weights(a)
plt.imshow(X[0])
plt.savefig('infig')
model.fit(X, X)
aa = model.predict(X)
plt.imshow(aa[0])
plt.savefig('outfig')
def create_model(self, input_shape, output_shape):
self.model = Sequential()
#self.model.add(Embedding(input_dim=input_shape[0], output_dim=input_shape[1]*2, input_length=input_shape[1]))
#self.model.add(BatchNormalization())
self.model.add(
SimpleSeq2Seq(output_dim=output_shape[2],
output_length=output_shape[1],
input_shape=(input_shape[1], input_shape[2]),
unroll=True))
"""
self.model.add(LSTM(512, return_sequences=True, unroll=True))
self.model.add(LSTM(1024, return_sequences=False, unroll=True))
self.model.add(Dense(output_classes))
self.model.add(Activation("softmax"))
"""
self.model.compile(optimizer=RMSprop(),
loss='categorical_crossentropy',
metrics=['accuracy'])
self.model.summary()
def couplet():
maxlen = 30 #length of input sequence and output sequence
max_features = 10000 #number of words
embedding_dim = 256 #word embedding size
data_dir = os.path.join(current_dir, "..", "data/couplet", "train")
tr_handler = preprocess(os.path.join(data_dir, "in.txt"),
os.path.join(data_dir, "out.txt"), max_features,
maxlen)
tr_handler.preprocess()
tr_x, tr_y = tr_handler.gen_all()
tr_y = tr_y.reshape(*tr_y.shape, 1)
# model setting
model = Sequential()
# model.add(Masking(mask_value=0))
model.add(
Embedding(max_features + 4, embedding_dim, input_length=maxlen + 2))
model.add(
SimpleSeq2Seq(input_length=maxlen + 2,
input_dim=embedding_dim,
hidden_dim=256,
output_length=maxlen + 2,
output_dim=embedding_dim,
depth=2,
dropout=0.2))
model.add(TimeDistributed(Dense(max_features + 4, activation='softmax')))
masked_categorical_crossentropy = get_loss(10003)
model.compile(optimizer='rmsprop',
loss=masked_categorical_crossentropy,
metrics=['accuracy'])
plot_model(model, to_file='model.png', show_shapes=True)
# training
out_batch = NBatchLogger(display=100, data_handler=tr_handler)
model.fit(tr_x, tr_y, epochs=100000, batch_size=64, callbacks=[out_batch])
print(model.predict(tr_x[:1])[0])
# Manual seeds
os.environ['PYTHONHASHSEED'] = '0' # Necessary for python3
np.random.seed(29)
rn.seed(29)
tf.set_random_seed(29)
hiddenDim = 256
depth = 2
myInput = Input(shape=(
framesPerWord,
nOfMouthPixels,
))
attn = SimpleSeq2Seq(input_dim=nOfMouthPixels,
hidden_dim=hiddenDim,
output_length=2,
output_dim=wordsVocabSize,
depth=depth)(myInput)
actn = Activation("softmax")(attn)
Seq2SeqLipReaderModel = Model(inputs=myInput, outputs=actn)
lr = 5e-4
adam = Adam(lr=lr)
Seq2SeqLipReaderModel.compile(optimizer=adam,
loss='categorical_crossentropy',
metrics=['accuracy'])
Seq2SeqLipReaderModel.summary()
filenamePre = 'SimpleSeq2Seq-h' + \
str(hiddenDim) + '-depth' + str(depth) + \
'-Adam-%1.e' % lr + '-GRIDcorpus-s'
def get_model(story_maxlen,
seq_maxlen,
num_inputs,
answer_maxlen,
char_embedding_size=30,
hidden_dim=150,
encoder_depth=1,
decoder_depth=1,
conv_nfilters=[],
query_lstm_dims=[],
hierarchical_lstm_dims=[],
query_maxlen=None,
dropout=0.5,
seq2seq_model="attention",
hierarchical=False):
assert seq2seq_model in ["attention", "simple", "seq2seq"]
if hierarchical:
assert story_maxlen is not None, "Need story maxlen for hierarchical model"
input_shape = (story_maxlen, seq_maxlen)
else:
input_shape = (seq_maxlen, )
# TODO Need to manually add this for correct output dims? Probably not since we add our own dense layer on top
# We WOULD need this if we eliminate last dense layer and have only an activation there.
# hidden_dims_decoder.append(num_inputs)
input1 = Input(shape=input_shape)
inputs = [input1]
embed_inner_input = Input((input_shape[-1], ))
embed1 = Embedding(num_inputs, char_embedding_size)(embed_inner_input)
embed1 = Dropout(dropout)(embed1)
pool = embed1
for conv_nfilter in conv_nfilters:
conv_len3 = Convolution1D(conv_nfilter,
3,
activation="tanh",
border_mode="same")(pool)
conv_len3 = Dropout(dropout)(conv_len3)
conv_len2 = Convolution1D(conv_nfilter,
2,
activation="tanh",
border_mode="same")(pool)
conv_len2 = Dropout(dropout)(conv_len2)
pool1 = MaxPooling1D(pool_length=2, stride=2,
border_mode='valid')(conv_len3)
pool2 = MaxPooling1D(pool_length=2, stride=2,
border_mode='valid')(conv_len2)
# could try merge with sum here instead, and no dense layer
pool = concatenate([pool1, pool2])
pool = TimeDistributed(Dense(conv_nfilter, activation="tanh"))(pool)
if hierarchical:
ln.debug("Inner LSTM input len is %s" % (pool._keras_shape[1]))
seq_embedding = pool
for hierarchical_lstm_dim in hierarchical_lstm_dims[:-1]:
seq_embedding = LSTM(hierarchical_lstm_dim,
return_sequences=True)(seq_embedding)
seq_embedding = LSTM(hierarchical_lstm_dims[-1],
return_sequences=False)(seq_embedding)
embed_inner_model = Model(embed_inner_input, seq_embedding)
seqs_embedded = TimeDistributed(embed_inner_model)(input1)
else:
embed_inner_model = Model(embed_inner_input, pool)
seqs_embedded = embed_inner_model(input1)
ln.debug("Will attend over %s time steps" % seqs_embedded._keras_shape[1])
if query_maxlen is not None:
input2 = Input(shape=(query_maxlen, ))
inputs.append(input2)
embed2 = Embedding(num_inputs, char_embedding_size)(input2)
# conv_embed2 = Convolution1D(hidden_dim, 2, activation="relu", border_mode="same")(embed2)
# pool2 = MaxPooling1D(pool_length=2, border_mode='valid')(conv_embed2)
query_encoded = embed2
for query_lstm_dim in query_lstm_dims[:-1]:
query_encoded = LSTM(query_lstm_dim,
return_sequences=True)(query_encoded)
query_encoded = LSTM(query_lstm_dims[-1],
return_sequences=False)(query_encoded)
query_encoded = RepeatVector(
seqs_embedded._keras_shape[1])(query_encoded)
seqs_embedded = concatenate([seqs_embedded, query_encoded])
if seq2seq_model == "attention":
decoded = AttentionSeq2Seq(
batch_input_shape=seqs_embedded._keras_shape,
hidden_dim=hidden_dim,
output_dim=hidden_dim,
depth=(encoder_depth, decoder_depth),
output_length=answer_maxlen,
# TODO add dropout once it works
)(seqs_embedded)
elif seq2seq_model == "seq2seq":
decoded = Seq2Seq(batch_input_shape=seqs_embedded._keras_shape,
hidden_dim=hidden_dim,
output_dim=hidden_dim,
depth=(encoder_depth, decoder_depth),
output_length=answer_maxlen,
peek=True)(seqs_embedded)
else:
decoded = SimpleSeq2Seq(batch_input_shape=seqs_embedded._keras_shape,
hidden_dim=hidden_dim,
output_dim=hidden_dim,
depth=(encoder_depth, decoder_depth),
output_length=answer_maxlen,
dropout=dropout)(seqs_embedded)
pred = TimeDistributed(Dense(num_inputs, activation="softmax"))(decoded)
model = Model(inputs=inputs, outputs=pred)
return model
Y.append(word_model.wv[dialog[1]])
if i % 100 == 0:
print i, "/", total_dialogs
X = np.array(X)
Y = np.array(Y)
num_ex, sequence_length, vec_size = X.shape
print X.shape
print u"Построение модели."
# vec_size - длина векторного слова
# sequence_length - длина предложения
model = SimpleSeq2Seq(input_dim=vec_size,
hidden_dim=vec_size,
output_length=sequence_length,
output_dim=vec_size,
depth=2)
model.compile(loss='mse', optimizer='rmsprop', metrics=['acc'])
model.summary()
plot_model(model, to_file='model.png')
print u"Настройка tensorboard."
tensorboard = TensorBoard(log_dir='data/generated/tensorboard',
histogram_freq=0,
write_graph=True,
write_images=False)
tensorboard.set_model(model)
total_iterations = 100000
import seq2seq
from seq2seq.models import SimpleSeq2Seq
model = SimpleSeq2Seq(input_dim=5,
hidden_dim=10,
output_length=8,
output_dim=8)
model.compile(loss='mse', optimizer='rmsprop')
time_steps = 10
epsilon_std = 1
padded_idxes = pad_sequences(idxes, maxlen=time_steps, dtype='int32', \
padding='pre', truncating='pre', value=0.)
x_train, x_test = train_test_split(padded_idxes,
test_size=0.2,
random_state=42)
x_train
# x_train, x_test = np.zeros((50,time_steps)), np.zeros((10,time_steps))
optimizer, loss, x, y = SimpleSeq2Seq(output_dim=embedding_size, output_length=time_steps, latent_dim=latent_dim, \
batch_size=batch_size, epsilon_std=epsilon_std, lookup_matrix=lookup_matrix, \
input_shape=(time_steps, embedding_size))
with tf.Session() as sess:
init = tf.global_variables_initializer()
sess.run(init)
epochs = 0
print_freq = 15
while epochs < 30:
print "Epochs:" + str(epochs)
i = 0
while i < len(x_train):
samples = x_train[i:i + batch_size, :]
i += batch_size
_, loss_val = sess.run([optimizer, loss],
feed_dict={
def define_seq2seq_model(self):
self.model = SimpleSeq2Seq(input_dim=self.n_in, hidden_dim=512, output_length=self.n_out, output_dim=self.n_out, depth=3)
self.model.compile(loss=self.loss_function, optimizer=self.optimizer)
y_val.append(answers[sample][:, :])
(X_train, y_train) = np.asarray(questions), np.asarray(answers)
X_val, y_val = np.asarray(X_val), np.asarray(y_val)
# print('Pad sequences (samples x time)')
# X_train = sequence.pad_sequences(X_train, maxlen=maxlen)
# X_val = sequence.pad_sequences(X_val, maxlen=maxlen)
# print('X_train shape:', X_train.shape)
# print('X_val shape:', X_val.shape)
# print('y_val shape:', y_val.shape)
print('Building model...')
# model = Sequential()
model = SimpleSeq2Seq(input_dim=26,
hidden_dim=50,
output_length=8,
output_dim=26)
model.compile(loss='mse', optimizer='adam')
# model.compile(loss='binary_crossentropy', optimizer='adam', metrics=['accuracy', 'perplexity'])
lookup = [
'a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j', 'k', 'l', 'm', 'n', 'o',
'p', 'q', 'r', 's', 't', 'u', 'v', 'w', 'x', 'y', 'z'
]
for i in xrange(10):
print('Training...')
model.fit(X_train,
y_train,
batch_size=batch_size,
nb_epoch=128,
validation_data=(X_val, y_val),
def build_model(self,input_dim,hidden_dim,output_length,output_dim,depth):
#model = SimpleSeq2Seq(input_dim=, hidden_dim=10, output_length=8, output_dim=20, depth=(4, 5))
self.model = SimpleSeq2Seq(input_dim=self.input_dim, hidden_dim=self.hidden_dim, output_length=self.output_length, output_dim=self.output_dim, depth=self.depth)
self.model.compile(loss='mse', optimizer='rmsprop')
# np.savetxt(f_handle, iids, delimiter=",",fmt="%s")
# f_handle.close()
iids = np.genfromtxt(
'/home/simon/Documents/LiClipse Workspace/MoviePrediction/iids.csv',
delimiter=',',
dtype=int)
X, Y, ds = getnewdata(iids[2], config)
Xt, Yt, ds = getnewdata(
iids[randint(config.getTestIndex()[0],
config.getTestIndex()[1])], config)
model = Sequential()
s2s = SimpleSeq2Seq(batch_input_shape=(1, X.shape[1], X.shape[2]),
hidden_dim=1,
output_length=config.getWindows()[1],
output_dim=1)
model.add(s2s)
model.add(Dense(40, activation='relu'))
model.add(Dropout(0.2))
model.add(Dense(2999, activation='softmax'))
opt = optimizers.Nadam()
model.compile(loss='sparse_categorical_crossentropy',
optimizer=opt,
metrics=['accuracy'])
for rounds in range(0, config.getEpochs()):
for index in range(config.getTrainIndex()[0], config.getTrainIndex()[1]):
print "Index ", index, " Round ", rounds
X, Y, ds = getnewdata(iids[index], config)
r = randint(config.getTestIndex()[0], config.getTestIndex()[1])
import seq2seq
from seq2seq.models import SimpleSeq2Seq
model = SimpleSeq2Seq(input_dim=5,
hidden_dim=10,
output_length=8,
output_dim=20,
depth=(4, 5))
model.compile(loss='mse', optimizer='rmsprop')
y_valid = valid["y"]
test = handler.getTest(padded=True, one_hot=True)
X_test = test["X"]
y_test = test["y"]
print "dimensiones del dataset:"
print "entrenamiento: " + str(X_train.shape)
print "validacion cruzada " + str(X_valid.shape)
print "testeo: " + str(X_test.shape)
print "-------------------------------"
model = SimpleSeq2Seq(input_dim=X_train.shape[2],
hidden_dim=512,
output_length=handler.max_output_length,
output_dim=y_train.shape[2],
depth=(1, 1))
model.compile(loss='mse', optimizer='rmsprop', metrics=['accuracy'])
print model.summary()
model_dir = "model/vmodel3.json"
weights_dir = "model/vmodel3.h5"
print "Salvando modelo en: " + model_dir
model_json = model.to_json()
with open(model_dir, "w") as json_file:
json_file.write(model_json)
print "arquitectura salvada!"
ITER = 500
print "Entrenando modelo: ..."