def fit(self, X, y, subpolicies=None):
if subpolicies is not None:
which = np.random.randint(len(subpolicies), size=len(X))
for i, subpolicy in enumerate(subpolicies):
X[which == i] = subpolicy(X[which == i])
X = X.astype(np.float32) / 255
callback = TqdmCallback(leave=False, file=sys.stdout, verbose=0)
callback.on_train_batch_begin = callback.on_batch_begin
callback.on_train_batch_end = callback.on_batch_end
self.model.fit(X,
y,
CHILD_BATCH_SIZE,
CHILD_EPOCHS,
verbose=0,
callbacks=[callback])
return self
def run(self,
numHidden1,
numHidden2=0,
numEpochs=20,
batchSize=512,
codeSuffix=''):
x_train, y_train = self.loadData()
x_train = np.array(x_train, np.float32)
numClasses = max(y_train) + 1
train_data = tf.data.Dataset.from_tensor_slices((x_train, y_train))
train_data = train_data.repeat().shuffle(5000).batch(
batchSize).prefetch(1)
layers = []
if (numHidden1 > 0):
layers += [tf.keras.layers.Dense(numHidden1, activation='relu')]
if (numHidden2 > 0):
layers += [tf.keras.layers.Dense(numHidden2, activation='relu')]
layers += [tf.keras.layers.Dense(numClasses)]
model = tf.keras.Sequential(layers)
model.compile(optimizer='adam',
loss=tf.keras.losses.SparseCategoricalCrossentropy(
from_logits=True),
metrics=['accuracy'])
model.fit(train_data,
epochs=numEpochs,
steps_per_epoch=100,
verbose=0,
callbacks=[TqdmCallback(verbose=2)])
self.writeCodeFile(model, codeSuffix)
def main():
df = pd.read_csv(args.input)
df = df[['ID', 'FORM', 'XPOSTAG']]
print(df.head())
sentences = Preparing_tagged_data(df)
print('Maximum sequence length:', MAX)
word2idx, idx2word, tag2idx, idx2tag = preparedicts(df)
X, y = prepareData(sentences, word2idx, tag2idx)
X_train, X_test, y_train, y_test = train_test_split(X,
y,
test_size=0.05,
random_state=7)
print("Dataset dimentions \n")
print(X_train.shape, y_train.shape)
print(X_test.shape, y_test.shape)
embedding_matrix = embeddings(word2idx)
model = BUILD_MODEL(X, MAX, len(word2idx), len(tag2idx), embedding_matrix)
history = model.fit(X_train,
y_train,
epochs=10,
batch_size=32,
validation_split=0.1,
verbose=0,
callbacks=[TqdmCallback(verbose=2)])
#evaluate_model(history)
print("Saving model at ", args.output)
model.save(args.output)
TestData(model, X_test, y_test, idx2tag)
def train_top_model():
train_data = np.load(open('bottleneck_features_train.npy', 'rb'))
train_labels = np.array(
[0] * (int(nb_train_samples / 2)) + [1] * (int(nb_train_samples / 2)))
validation_data = np.load(open('bottleneck_features_validation.npy', 'rb'))
validation_labels = np.array(
[0] * (int(nb_validation_samples / 2)) +
[1] * (int(nb_validation_samples / 2)))
model = Sequential()
model.add(Flatten(input_shape=train_data.shape[1:]))
model.add(Dense(256, activation='relu'))
model.add(Dropout(0.5))
model.add(Dense(1, activation='sigmoid'))
model.compile(optimizer='rmsprop',
loss='binary_crossentropy', metrics=['accuracy'])
model.fit(train_data, train_labels,
epochs=epochs,
batch_size=batch_size,
validation_data=(validation_data, validation_labels),
verbose=0,
callbacks=[TqdmCallback(), CSVLogger("metrics.csv")])
model.save_weights(top_model_weights_path)
def train_model(model, train_data, train_labels, regenerate=True):
# Build tensorflow dataset
dataset = tf.data.Dataset.from_tensor_slices((train_data, train_labels)).batch(128)
if regenerate:
# Train Model
early_stopping_callback = keras.callbacks.EarlyStopping(monitor='loss',
min_delta=10e-8,
patience=50,
verbose=0,
mode='auto',
baseline=None)
model.fit(dataset,
shuffle=True,
epochs=5000, # war 10000
verbose=0,
callbacks=[TqdmCallback(verbose=1),
early_stopping_callback])
# Save model
model.save('model.h5')
else:
model = tf.keras.models.load_model('model.h5')
print(model.summary())
return model
def get_callbacks():
filepath1 = "./weights/weights-race-{epoch:02d}-{val_dense_5_accuracy:.2f}.h5"
checkpoint1 = ModelCheckpoint(filepath1,
monitor='val_dense_5_accuracy',
verbose=1,
mode='auto',
save_best_only=True)
filepath2 = "./weights/weights-age-{epoch:02d}-{val_dense_3_accuracy:.2f}.h5"
checkpoint2 = ModelCheckpoint(filepath2,
monitor='val_dense_3_accuracy',
verbose=1,
mode='auto',
save_best_only=True)
def lr_scheduler(epoch, lr):
decay_rate = 0.1
decay_step = 50
if epoch % decay_step == 0 and epoch > 10:
lr = decay_rate * lr
return lr
scheduler = LearningRateScheduler(lr_scheduler, verbose=1)
es = EarlyStopping(monitor='val_loss',
patience=40,
verbose=1,
min_delta=1e-2)
callbacks_list = [checkpoint1, checkpoint2, scheduler, TqdmCallback()]
return callbacks_list
def train_model(model,
train_id,
x_train,
y_train,
dydx_train=None,
scaled_MSE=None,
epochs = EPOCHS,
x_true = None,
y_true = None,
dydx_true = None):
x_norm, y_norm, dydx_norm = get_norm_layers(x_train, y_train, dydx_train)
if scaled_MSE is not None:
scaled_MSE.adapt(dydx_train)
history = model.fit(
x_norm(x_train), [y_norm(y_train), dydx_norm(dydx_train)],
steps_per_epoch = STEPS_PER_EPOCH,
epochs=epochs,
callbacks=[
# tf.keras.callbacks.TensorBoard(log_dir = log_dir+train_id, histogram_freq=1),
tf.keras.callbacks.EarlyStopping(monitor='loss',patience=100),
TqdmCallback(verbose=1)
],
validation_data = (x_norm(x_true), [y_norm(y_true), dydx_norm(dydx_true)]),
verbose=0
)
return history, x_norm, y_norm
def train_top_model():
train_data = np.load(train_feature_path)
train_labels = np.array([0] * (nb_train_samples // 2) + [1] *
(nb_train_samples // 2))
validation_data = np.load(valid_feature_path)
validation_labels = np.array([0] * (nb_validation_samples // 2) + [1] *
(nb_validation_samples // 2))
model = Sequential()
model.add(Flatten(input_shape=train_data.shape[1:]))
model.add(Dense(256, activation='relu'))
model.add(Dropout(0.5))
model.add(Dense(1, activation='sigmoid'))
model.compile(optimizer='rmsprop',
loss='binary_crossentropy',
metrics=['accuracy'])
model.fit(train_data,
train_labels,
epochs=epochs,
batch_size=batch_size,
validation_data=(validation_data, validation_labels),
verbose=0,
callbacks=[TqdmCallback(),
CSVLogger(metrics_file)])
model.save_weights(top_model_weights_path)
model_json = model.to_json()
with open(top_model_json_path, "w") as json_file:
json_file.write(model_json)
def build_model(self, input_shape, nb_classes):
input_layer = keras.layers.Input(input_shape)
x = input_layer
input_res = input_layer
for d in range(self.depth):
x = self._inception_module(x)
if self.use_residual and d % 3 == 2:
x = self._shortcut_layer(input_res, x)
input_res = x
gap_layer = keras.layers.GlobalAveragePooling1D()(x)
output_layer = keras.layers.Dense(nb_classes, activation='softmax')(gap_layer)
model = keras.models.Model(inputs=input_layer, outputs=output_layer)
model.compile(loss='categorical_crossentropy', optimizer=keras.optimizers.Adam(self.lr),
metrics=['accuracy'])
reduce_lr = keras.callbacks.ReduceLROnPlateau(monitor='loss', factor=0.5, patience=50,
min_lr=0.0001)
file_path = self.output_directory + 'best_model.hdf5'
model_checkpoint = keras.callbacks.ModelCheckpoint(filepath=file_path, monitor='loss',
save_best_only=True)
self.callbacks = [reduce_lr, model_checkpoint, TqdmCallback(verbose=0)]
return model
def __poison__tensorflow(self, x_poison: np.ndarray,
y_poison: np.ndarray) -> Tuple[Any, Any]:
"""
Optimize the poison by matching the gradient within the perturbation budget.
:param x_poison: List of samples to poison.
:param y_poison: List of the labels for x_poison.
:return: A pair of poisoned samples, B-score (cosine similarity of the gradients).
"""
self.backdoor_model.compile(loss=None, optimizer=self.optimizer)
callbacks = [self.lr_schedule]
if self.verbose > 0:
from tqdm.keras import TqdmCallback
callbacks.append(TqdmCallback(verbose=self.verbose - 1))
# Train the noise.
self.backdoor_model.fit(
[x_poison, y_poison, np.arange(len(y_poison))],
callbacks=callbacks,
batch_size=self.batch_size,
epochs=self.max_epochs,
verbose=0,
)
[input_noised_, B_] = self.backdoor_model.predict( # pylint: disable=C0103
[x_poison, y_poison, np.arange(len(y_poison))],
batch_size=self.batch_size)
return input_noised_, B_
def _fit_transform(self,
graph: Graph,
return_dataframe: bool = True,
verbose: bool = True) -> EmbeddingResult:
"""Return node embedding"""
try:
from tqdm.keras import TqdmCallback
traditional_verbose = False
except AttributeError:
traditional_verbose = True
if has_gpus() and self._use_mirrored_strategy:
strategy = tf.distribute.experimental.MultiWorkerMirroredStrategy()
else:
strategy = tf.distribute.get_strategy()
# # Build the model
with strategy.scope():
model = self._build_model(graph)
# Get the model input
training_input = self._build_input(graph, verbose=verbose)
if not isinstance(training_input, tuple):
raise ValueError("The provided input data is not a tuple.")
# Fit the model
model.fit(
*training_input,
epochs=self._epochs,
verbose=traditional_verbose and verbose > 0,
batch_size=(self._batch_size if issubclass(
training_input[0].__class__, Sequence) else None),
steps_per_epoch=self._get_steps_per_epoch(graph),
callbacks=[
EarlyStopping(
monitor="loss",
min_delta=self._early_stopping_min_delta,
patience=self._early_stopping_patience,
mode="min",
),
ReduceLROnPlateau(
monitor="loss",
min_delta=self._learning_rate_plateau_min_delta,
patience=self._learning_rate_plateau_patience,
factor=0.5,
mode="min",
),
*((TqdmCallback(verbose=1, leave=False), )
if not traditional_verbose and verbose > 0 else ()),
],
)
# Extract and return the embedding
return self._extract_embeddings(graph,
model,
return_dataframe=return_dataframe)
def DNN_Classify(
train_data,
train_size,
#model_load,
#learning_period,
hist, # time length of input data
iterations
#update_period, # gradient will be updated for every 10 iterations
#save_direct # location of saving weights
):
variables = train_data.iloc[:train_size].copy()
labels = torch.as_tensor(variables.Label.iloc[hist:].copy().values)
labels = torch.nn.functional.one_hot(labels.long())
variables = variables.drop('Label', axis=1).copy()
scaler.fit(variables)
_, features = preprocFeatures(variables)
#gainArr = gainArr.values.tolist()[hist:]
features = flattenSeries(features, hist)
inputdim = len(features[-1])
#model_load = False
model = tf.keras.Sequential()
model.add(tf.keras.layers.Dense(128, input_dim=inputdim,
activation='relu'))
model.add(tf.keras.layers.Dense(52, activation='relu'))
model.add(tf.keras.layers.Dense(2, activation='softmax'))
optimizer = tf.keras.optimizers.Adam(learning_rate=0.001)
model.compile(optimizer=optimizer, loss='categorical_crossentropy')
early_stopping = EarlyStopping(monitor='loss',
mode='min',
verbose=0,
patience=50)
mc = ModelCheckpoint(save_direct + '/test_historic_' + str(train_size) +
'.h5',
monitor='loss',
mode='min',
save_best_only=True)
if model_load == False:
pass
else:
model.load_weights(save_direct + '/test_historic_' +
str(train_size - learning_period) + '.h5')
model.fit(np.array(features),
np.array(labels),
epochs=iterations,
verbose=0,
callbacks=[TqdmCallback(verbose=0), early_stopping, mc])
model.save_weights(save_direct + '/test_historic_' + str(train_size) +
'.h5')
def train_model(model,
train_data,
train_labels,
parameters,
silent,
regenerate=True):
# Build tensorflow dataset
dataset = tf.data.Dataset.from_tensor_slices(
(train_data, train_labels)).batch(parameters['batch_size'])
if regenerate:
# Train Model
# Early stopping callback
early_stopping_callback = keras.callbacks.EarlyStopping(
monitor='loss',
min_delta=10e-8,
patience=50,
verbose=0,
mode='auto',
baseline=None)
# History to csv callback
path = os.path.dirname(os.path.abspath(__file__))
param_str = parameters['filename']
file_name = os.path.join(path, '..', 'models', 'history',
'history' + param_str + '.csv')
csv_logger = tf.keras.callbacks.CSVLogger(file_name,
separator=',',
append=False)
# Train model
model.fit(
dataset,
shuffle=True,
epochs=parameters['epochs'], # war 10000
verbose=0,
callbacks=[
TqdmCallback(verbose=(0 if silent else 1)),
early_stopping_callback, csv_logger
])
# Save model
path = os.path.dirname(os.path.abspath(__file__))
param_str = parameters['filename']
file_name = os.path.join(path, '..', 'models', 'models',
'model' + param_str + '.h5')
model.save(file_name)
else:
path = os.path.dirname(os.path.abspath(__file__))
param_str = parameters['filename']
file_name = os.path.join(path, '..', 'models', 'models',
'model' + param_str + '.h5')
model = tf.keras.models.load_model(file_name)
print(model.summary())
return model
def train(DATA_URL, SAVE_URL):
x_train, y_train, x_test = data_loader(DATA_URL)
model = create_cnn_model(x_train)
model.compile(loss='categorical_crossentropy', optimizer='adam', metrics=['accuracy'])
# 파일 이름에 에포크 번호를 포함시킵니다(`str.format` 포맷)
checkpoint_path = os.path.join(SAVE_URL,"my_model.h5")
# checkpoint_dir = SAVE_URL
model.fit(x_train, y_train, epochs=20, verbose=0, callbacks=[TqdmCallback(verbose=2)])
model.save(checkpoint_path)
return model
def build_model(self, input_shape, nb_classes, len_series):
nb_rows = [
np.int(self.ratio[0] * len_series),
np.int(self.ratio[1] * len_series)
]
nb_cols = input_shape[2]
input_layer = keras.layers.Input(input_shape)
x_layer_1 = keras.layers.Conv2D(
self.num_filter, (nb_rows[0], nb_cols),
kernel_initializer='lecun_uniform',
activation='relu',
padding='valid',
strides=(1, 1),
data_format='channels_first')(input_layer)
x_layer_1 = keras.layers.GlobalMaxPooling2D(
data_format='channels_first')(x_layer_1)
y_layer_1 = keras.layers.Conv2D(
self.num_filter, (nb_rows[1], nb_cols),
kernel_initializer='lecun_uniform',
activation='relu',
padding='valid',
strides=(1, 1),
data_format='channels_first')(input_layer)
y_layer_1 = keras.layers.GlobalMaxPooling2D(
data_format='channels_first')(y_layer_1)
concat_layer = keras.layers.concatenate([x_layer_1, y_layer_1])
#concat_layer = keras.layers.Dense(128, kernel_initializer = 'lecun_uniform', activation = 'relu')(concat_layer)
#concat_layer = keras.layers.Dense(128, kernel_initializer = 'lecun_uniform', activation = 'relu')(concat_layer)
concat_layer = keras.layers.Dropout(0.25)(concat_layer)
output_layer = keras.layers.Dense(nb_classes,
kernel_initializer='lecun_uniform',
activation='softmax')(concat_layer)
model = keras.models.Model(input_layer, output_layer)
model.compile(loss='categorical_crossentropy',
optimizer=tf.keras.optimizers.Adam(learning_rate=0.001),
metrics=['accuracy'])
self.callbacks_ = []
if self.verbose:
self.callbacks_.append(TqdmCallback(verbose=0))
return model
def train_2(model_fn,
data_microbioma,
data_domain,
latent_space=10,
folds=5,
epochs=20,
batch_size=128,
learning_rate_scheduler=ExpDecayScheluder(),
random_seed=347,
verbose=0):
data_zeros_latent = np.zeros((data_microbioma.shape[0], latent_space),
dtype=data_microbioma.dtype)
results = []
models = []
train_callbacks = [
callbacks.EarlyStopping(monitor='val_loss',
patience=epochs + 1,
restore_best_weights=True)
]
if verbose >= 0:
train_callbacks += [TqdmCallback(verbose=verbose)]
if learning_rate_scheduler is not None:
train_callbacks += [learning_rate_scheduler.make()]
if folds <= 1:
m_train, m_test = data_microbioma, data_microbioma
d_train, d_test = data_domain, data_domain
z_train, z_test = data_zeros_latent, data_zeros_latent
tf.random.set_seed(random_seed)
r, m = train_kfold(model_fn, m_train, d_train, z_train, m_test, d_test,
z_test, batch_size, epochs, train_callbacks)
results.append(r)
models.append(m)
else:
kf = KFold(n_splits=folds, random_state=random_seed, shuffle=True)
tf.random.set_seed(random_seed)
for train_index, test_index in kf.split(data_microbioma):
m_train, m_test = data_microbioma[train_index], data_microbioma[
test_index]
d_train, d_test = data_domain[train_index], data_domain[test_index]
z_train, z_test = data_zeros_latent[
train_index], data_zeros_latent[test_index]
r, m = train_kfold(model_fn, m_train, d_train, z_train, m_test,
d_test, z_test, batch_size, epochs,
train_callbacks)
results.append(r)
models.append(m)
return results, models
def train(training_samples, samples_labels, num_of_epochs=100, batch_size=1024, validation_split=0.0):
model = prepare_network_model(samples_labels.shape[-1])
conv_weights = []
get_weights = LambdaCallback(on_epoch_end=lambda batch, logs: conv_weights.append(np.array([np.rot90(x, 3) for x in model.layers[0].get_weights()[0].squeeze()[::-1].T])))
history_temp = model.fit(training_samples, samples_labels,
batch_size=batch_size,
epochs=num_of_epochs,
validation_split=validation_split,
callbacks=[get_weights, TqdmCallback(verbose=1)],
verbose=0)
return np.array(conv_weights)
def train(
self,
X_train=None,
y_train=None,
validation_data=None,
early_stopping: int = None,
tqdm=True,
**params,
):
"""Base method to train input model. Based on Keras hyperparameters
Args:
X_train ([pd.DataFrame, np.array], optional): the Keras `x` input. Defaults to None. If None, the learner will take the attribute `X_train` fitted in the class.
y_train ([pd.DataFrame, np.array], optional): the Keras `y` input. Defaults to None. If None, the learner will take the attribute `y_train` fitted in the class.
validation_data ([pd.DataFrame, np.array], optional): the Keras `validation_data` input. Defaults to None. If None, the learner will take the attribute `validation_data` fitted in the class.
early_stopping (int, optional): Number of epochs before Early Stopping. Defaults to None. If None, the training will last `epochs`.
tqdm (bool, optional): To create `tqdm` progress bar during training or not. Defaults to True.
"""
if X_train is not None:
self.X_train = X_train
if y_train is not None:
self.y_train = y_train
if validation_data is not None:
self.validation_data = validation_data
if early_stopping:
self.early_stopping_ = early_stopping
es = keras.callbacks.EarlyStopping(monitor="val_loss",
patience=self.early_stopping)
self.callbacks.append(es)
if tqdm:
tqdm_nb = TqdmCallback()
self.callbacks.append(tqdm_nb)
self.set_params(params)
logging.info("Start training")
history = self.model.model.fit(
x=self.X_train.values,
y=self.y_train,
batch_size=self.batch_size,
shuffle=self.shuffle,
epochs=self.epochs,
verbose=self.verbose,
validation_data=self.validation_data,
class_weight=self.class_weight_dict,
callbacks=self.callbacks,
)
self.history = history.history
def train_model(model, train_data, train_labels, val_data, val_labels,
parameters, silent):
# Build tensorflow dataset
train_dataset = tf.data.Dataset.from_tensor_slices((train_data, train_labels))\
.batch(parameters['batch_size'])\
.prefetch(parameters['batch_size']*4)
val_dataset = tf.data.Dataset.from_tensor_slices((val_data, val_labels))\
.batch(parameters['batch_size'])\
.prefetch(parameters['batch_size']*4)
# Train Model
# Early stopping callback
early_stopping_callback = keras.callbacks.EarlyStopping(monitor='val_loss',
min_delta=10e-8,
patience=5,
verbose=0,
mode='auto',
baseline=None)
# History to csv callback
path = os.path.dirname(os.path.abspath(sys.argv[0]))
param_str = parameters['filename']
file_name = os.path.join(path, 'models', 'history',
'history' + param_str + '.csv')
csv_logger = tf.keras.callbacks.CSVLogger(file_name,
separator=',',
append=False)
# Train model
model.fit(
train_dataset,
validation_data=val_dataset,
shuffle=True,
epochs=parameters['epochs'], # war 10000
verbose=0,
callbacks=[
TqdmCallback(verbose=(0 if silent else 1)),
early_stopping_callback, csv_logger
])
# validation_steps=2,
# Save model
path = os.path.dirname(os.path.abspath(sys.argv[0]))
param_str = parameters['filename']
file_name = os.path.join(path, 'models', 'models',
'model' + param_str + '.h5')
model.save(file_name)
return model
def fit():
train_ds, val_ds, test_ds, feature_columns = read_data()
all_inputs, encoded_features = prepare_data(
columns=["mileage", "year", "power", "model_number", "consumption"],
train_ds=train_ds)
all_features = tf.keras.layers.concatenate(encoded_features)
x = tf.keras.layers.Dense(12, activation="relu")(all_features)
x = tf.keras.layers.Dropout(0.05)(x)
x = tf.keras.layers.Dense(7, activation="relu")(x)
output = tf.keras.layers.Dense(1)(x)
model = tf.keras.Model(all_inputs, output)
model.compile(optimizer=tf.optimizers.Adam(learning_rate=0.1),
loss=tf.keras.losses.MeanSquaredError(),
metrics=[
tfa.metrics.r_square.RSquare(y_shape=(1, )),
tf.metrics.MeanAbsolutePercentageError()
])
epochs = 100
history = model.fit(train_ds,
validation_data=val_ds,
epochs=epochs,
verbose=0,
callbacks=[TqdmCallback(verbose=0, position=0)])
plot_loss(history, epochs=range(epochs))
plt.show()
logger.info(model.summary())
accuracy = model.evaluate(test_ds)
logger.info(f"Accuracy : {accuracy}")
y = tf.concat([y for x, y in test_ds], axis=0)
logger.info(
tf.concat([model.predict(test_ds),
tf.expand_dims(y, -1)], axis=1))
model.save('neural_net_classifier', save_format='h5')
tf.keras.utils.plot_model(model, show_shapes=True, rankdir="LR")
def build_and_train_keras_sequential():
train_ds, val_ds, test_ds, feature_columns = read_data()
feature_layer = tf.keras.layers.DenseFeatures(feature_columns)
model = tf.keras.Sequential([
feature_layer,
layers.Dense(24, activation='relu'),
layers.Dropout(.1),
layers.Dense(10, activation='relu'),
layers.Dropout(.1),
layers.Dense(1)
])
model.compile(optimizer='adam',
loss=tf.keras.losses.MeanSquaredError(),
metrics=[
tfa.metrics.r_square.RSquare(y_shape=(1, )),
tf.metrics.MeanAbsolutePercentageError()
])
epochs = 100
history = model.fit(train_ds,
validation_data=val_ds,
epochs=epochs,
verbose=0,
callbacks=[TqdmCallback(verbose=0, position=0)])
plot_loss(history, epochs=range(epochs))
plt.show()
logger.info(model.summary())
accuracy = model.evaluate(test_ds)
logger.info(f"Accuracy : {accuracy}")
y = tf.concat([y for x, y in test_ds], axis=0)
logger.info(
tf.concat([model.predict(test_ds),
tf.expand_dims(y, -1)], axis=1))
model.save('neural_net_classifier', save_format='tf')
def build_model(self, input_shape, nb_classes, len_series, ratio, num_filter):
#ratio = self.conv_config['ratio']
nb_rows = [np.int(ratio[0]*len_series), np.int(ratio[1]*len_series)]
nb_cols = input_shape[2]
input_layer = keras.layers.Input(input_shape)
x_layer_1 = keras.layers.Conv2D(num_filter, (nb_rows[0], nb_cols), kernel_initializer='lecun_uniform', activation='relu',
padding='valid', strides=(1, 1), data_format='channels_last')(input_layer)
x_layer_1 = keras.layers.GlobalMaxPooling2D(
data_format='channels_first')(x_layer_1)
y_layer_1 = keras.layers.Conv2D(num_filter, (nb_rows[1], nb_cols), kernel_initializer='lecun_uniform', activation='relu',
padding='valid', strides=(1, 1), data_format='channels_last')(input_layer)
y_layer_1 = keras.layers.GlobalMaxPooling2D(
data_format='channels_last')(y_layer_1)
concat_layer = keras.layers.concatenate([x_layer_1, y_layer_1])
layer_2 = keras.layers.Dense(
64, kernel_initializer='lecun_uniform', activation='relu')(concat_layer)
layer_3 = keras.layers.Dense(
128, kernel_initializer='lecun_uniform', activation='relu')(layer_2)
layer_3 = keras.layers.Dropout(0.25)(layer_3)
output_layer = keras.layers.Dense(
nb_classes, kernel_initializer='lecun_uniform', activation='softmax')(layer_3)
model = keras.models.Model(input_layer, output_layer)
model.compile(loss='categorical_crossentropy', optimizer=tf.keras.optimizers.Adam(
learning_rate=0.001), metrics=['accuracy'])
#factor = 1. / np.cbrt(2)
#reduce_lr = keras.callbacks.ReduceLROnPlateau(monitor='loss', factor=factor, patience=100, min_lr=1e-4, cooldown=0, mode='auto')
self.callbacks = [TqdmCallback(verbose=0)]
return model
def build_model(self, input_shape, nb_classes):
input_layer = keras.layers.Input(input_shape)
# flatten/reshape because when multivariate all should be on the same axis
input_layer_flattened = keras.layers.Flatten()(input_layer)
layer_1 = keras.layers.Dropout(0.1)(input_layer_flattened)
layer_1 = keras.layers.Dense(500, activation='relu')(layer_1)
layer_2 = keras.layers.Dropout(0.2)(layer_1)
layer_2 = keras.layers.Dense(500, activation='relu')(layer_2)
layer_3 = keras.layers.Dropout(0.2)(layer_2)
layer_3 = keras.layers.Dense(500, activation='relu')(layer_3)
output_layer = keras.layers.Dropout(0.3)(layer_3)
output_layer = keras.layers.Dense(nb_classes,
activation='softmax')(output_layer)
model = keras.models.Model(inputs=input_layer, outputs=output_layer)
model.compile(loss='categorical_crossentropy',
optimizer=keras.optimizers.Adadelta(),
metrics=['accuracy'])
reduce_lr = keras.callbacks.ReduceLROnPlateau(monitor='loss',
factor=0.5,
patience=200,
min_lr=0.0001)
file_path = self.output_dir + 'best_model.hdf5'
model_checkpoint = keras.callbacks.ModelCheckpoint(filepath=file_path,
monitor='loss',
save_best_only=True)
self.callbacks = [reduce_lr, model_checkpoint, TqdmCallback(verbose=0)]
return model
def callback(self, model):
call = []
if os.path.exists(checkpoint_path):
if os.listdir(checkpoint_path):
logger.debug('load the model')
model.load_weights(
os.path.join(checkpoint_path,
self.calculate_the_best_weight()))
logger.debug(
f'读取的权重为{os.path.join(checkpoint_path, self.calculate_the_best_weight())}'
)
cp_callback = tf.keras.callbacks.ModelCheckpoint(
filepath=checkpoint_file_path,
verbose=1,
save_weights_only=True,
save_best_only=True,
period=1)
call.append(cp_callback)
tensorboard_callback = tf.keras.callbacks.TensorBoard(
log_dir=log_dir,
histogram_freq=1,
write_images=True,
update_freq=UPDATE_FREQ)
call.append(tensorboard_callback)
lr_callback = tf.keras.callbacks.ReduceLROnPlateau(
factor=0.01, patience=LR_PATIENCE)
call.append(lr_callback)
csv_callback = tf.keras.callbacks.CSVLogger(filename=csv_path,
append=True)
call.append(csv_callback)
early_callback = tf.keras.callbacks.EarlyStopping(
min_delta=0, verbose=1, patience=EARLY_PATIENCE)
call.append(early_callback)
call.append(TqdmCallback())
return (model, call)
def main():
df = pd.read_csv(args.input)
print(df.head())
sentences = Preparing_tagged_data(df)
print('Maximum sequence length:', MAX)
word2idx, idx2word, tag2idx, idx2tag = preparedicts(df)
X, y = prepareData(sentences, word2idx, tag2idx)
X_train, X_test, y_train, y_test = train_test_split(X,
y,
test_size=0.05,
random_state=7)
print("Dataset dimentions \n")
print(X_train.shape, y_train.shape)
print(X_test.shape, y_test.shape)
embedding_matrix = embeddings(word2idx)
print(MAX)
model = BUILD_MODEL(X, MAX, len(word2idx), len(tag2idx), embedding_matrix)
model.compile(loss='categorical_crossentropy',
optimizer='adam',
metrics=['accuracy'])
history = model.fit(X_train,
y_train,
epochs=10,
batch_size=64,
validation_split=0.1,
verbose=0,
callbacks=[TqdmCallback(verbose=1)])
evaluate_model(history)
TestData(model, X_test, y_test, idx2tag)
print("Saving model at ", args.output)
model.save(args.output)
input_noise = np.expand_dims(input_noise,0) * NOISE_REDUCTION
target = np.expand_dims(ct_small,0)
# initialize
results_all = []
predicted_all = []
epochs_saved = [0]
previous_epochs = 0
model = get_architecture(target[0], archi, ch_init, g_noise, act_max_value, act_out_max_value)
opt = tf.keras.optimizers.Adam(lr_value)
loss_masked, mask_used = choose_loss(mask_target, mask_target2, mask_target3, LOSS_USED=0)
model.compile(optimizer=opt, loss=loss_masked)
# Train model
for i in tqdm(range(LOOP_MASKS)):
results = model.fit(input_noise, target, epochs=EPOCHS, verbose=0, callbacks=[TqdmCallback(verbose=0)]);
results_all.extend(results.history['loss'])
predicted_all.append(model.predict(input_noise)[0,...])
epochs_saved.append(epochs_saved[-1] + EPOCHS)
# sneak peek
loss_masked, mask_used = choose_loss(mask_target, mask_target2, mask_target3, LOSS_USED=2)
results = model.fit(input_noise, target, epochs=EPOCHS_sneak_peek, verbose=0, callbacks=[TqdmCallback(verbose=0)]);
loss_masked, mask_used = choose_loss(mask_target, mask_target2, mask_target3, LOSS_USED=0)
results_all.extend(results.history['loss'])
predicted_all.append(model.predict(input_noise)[0,...])
epochs_sneak_peak = epochs_saved[-1] + EPOCHS_sneak_peek
epochs_saved.append(epochs_sneak_peak)
lr_value = lr_value * LR_REDUCE
K.set_value(model.optimizer.learning_rate, lr_value)
def fit(self, X, Y, output_slices=None, **kwargs):
with get_device(self.config):
checkpoint = self.model_path.joinpath('checkpoint')
if checkpoint.exists() and not self.no_load:
if self.verbose:
print(f'Restoring model weights from {checkpoint}')
self.load()
elif self.no_load and X is None:
raise Exception(
'Model exists, but no_load is set and no training data was given.'
)
elif X is not None and Y is not None:
self.scalerx.fit(ensure_format(X), ensure_format(Y))
self.scalery.fit(ensure_format(Y))
# Gather all data (train, validation, test, ...) into singular object
datasets = kwargs['datasets'] = kwargs.get('datasets', {})
datasets.update({'train': {'x': X, 'y': Y}})
for key, data in datasets.items():
if data['x'] is not None:
datasets[key].update({
'x_t':
self.scalerx.transform(ensure_format(data['x'])),
'y_t':
self.scalery.transform(ensure_format(data['y'])),
})
assert (np.isfinite(datasets['train']['x_t']).all()
), 'NaN values found in X training data'
self.update_config({
'output_slices':
output_slices or {
'': slice(None)
},
'n_inputs':
datasets['train']['x_t'].shape[1],
'n_targets':
datasets['train']['y_t'].shape[1],
})
self.build()
callbacks = []
model_kws = {
'batch_size':
self.batch,
'epochs':
max(1, int(self.n_iter / max(1,
len(X) / self.batch))),
'verbose':
0,
'callbacks':
callbacks,
}
if self.verbose:
callbacks.append(
TqdmCallback(model_kws['epochs'],
data_size=len(X),
batch_size=self.batch))
if self.debug:
callbacks.append(
tf.keras.callbacks.TensorBoard(histogram_freq=1,
profile_batch=(2, 60)))
if 'args' in kwargs:
if getattr(kwargs['args'], 'plot_loss', False):
callbacks.append(
PlottingCallback(kwargs['args'], datasets, self))
if getattr(kwargs['args'], 'save_stats', False):
callbacks.append(
StatsCallback(kwargs['args'], datasets, self))
if getattr(kwargs['args'], 'best_epoch', False):
if 'valid' in datasets and 'x_t' in datasets['valid']:
model_kws['validation_data'] = (
datasets['valid']['x_t'],
datasets['valid']['y_t'])
callbacks.append(ModelCheckpoint(self.model_path))
self.model.fit(datasets['train']['x_t'],
datasets['train']['y_t'], **model_kws)
if not self.no_save:
self.save()
else:
raise Exception(
f"No trained model exists at: \n{self.model_path}")
return self
def train_unet(config,
train_dataloader=None,
val_dataloader=None,
loss=None,
metrics=None,
checkpoint_dir=None):
epochs = 15
batch_size = 1
model = get_model(backbone='vvg16',
encoder_freeze=config["encoder_freeze"],
n_classes=1,
activation='sigmoid',
dropout=config["dropout"])
model.compile(optimizer=config["optimizer"](config["learning_rate"]),
loss=loss,
metrics=metrics)
history = model.fit(train_dataloader,
steps_per_epoch=len(train_dataloader),
epochs=epochs,
verbose=0,
batch_size=batch_size,
validation_data=val_dataloader,
validation_steps=len(val_dataloader),
callbacks=[
TuneReportCallback(
{
"loss": "loss",
"iou_score": "iou_score",
"val_loss": "val_loss",
"val_iou_score": "val_iou_score",
},
on="epoch_end"),
TqdmCallback(verbose=2),
])
# save best model of the trial
with tune.checkpoint_dir(step=1) as checkpoint_dir:
checkpoint_dir = os.path.dirname(
os.path.dirname(checkpoint_dir)) # go up two directories
score_file_path = os.path.join(checkpoint_dir, 'score')
score_file_exists = os.path.isfile(score_file_path)
new_val_iou_score = history.history['val_iou_score'][0]
best_model_file_path = os.path.join(checkpoint_dir, 'best_model.h5')
if score_file_exists:
old_val_iou_score = 0
with open(score_file_path) as f:
old_val_iou_score = float(f.read())
if new_val_iou_score > old_val_iou_score:
# we have a new best model
with open(score_file_path, 'w') as f:
f.write(str(new_val_iou_score))
model.save(best_model_file_path)
else:
# first model of the trial
with open(score_file_path, 'w') as f:
f.write(str(new_val_iou_score))
model.save(best_model_file_path)
print(history.history.keys())
def run_training(
model_f,
lr_f,
name,
epochs,
batch_size,
train_data,
val_data,
img,
img_size,
mixed_float=True,
notebook=True,
):
"""
val_data : (X_val, Y_val) tuple
"""
if mixed_float:
policy = mixed_precision.Policy('mixed_float16')
mixed_precision.set_policy(policy)
st = time.time()
inputs = keras.Input((200, 200, 3))
mymodel = AdiposeModel(inputs, model_f)
loss = keras.losses.BinaryCrossentropy(from_logits=True)
mymodel.compile(optimizer='adam',
loss=loss,
metrics=[
keras.metrics.BinaryAccuracy(threshold=0.5),
])
logdir = 'logs/fit/' + name
tensorboard_callback = tf.keras.callbacks.TensorBoard(log_dir=logdir,
histogram_freq=1,
profile_batch='3,5',
update_freq='epoch')
lr_callback = keras.callbacks.LearningRateScheduler(lr_f, verbose=1)
savedir = 'savedmodels/' + name + '/{epoch}'
save_callback = keras.callbacks.ModelCheckpoint(savedir,
save_weights_only=True,
verbose=1)
if notebook:
tqdm_callback = TqdmNotebookCallback(
metrics=['loss', 'binary_accuracy'], leave_inner=False)
else:
tqdm_callback = TqdmCallback()
train_ds = create_train_dataset(img, train_data, img_size, batch_size)
val_ds = create_train_dataset(img, val_data, img_size, batch_size, True)
image_callback = ValFigCallback(val_ds, logdir)
mymodel.fit(
x=train_ds,
epochs=epochs,
steps_per_epoch=len(train_data) // batch_size,
callbacks=[
tensorboard_callback,
lr_callback,
save_callback,
tqdm_callback,
image_callback,
],
verbose=0,
validation_data=val_ds,
validation_steps=10,
)
print('Took {} seconds'.format(time.time() - st))
mymodel.evaluate(val_ds, steps=1000)
training_data = data_gen.flow(*list(zip(*training_data)))
if validation_data is not None:
validation_data = data_gen.flow(*list(zip(*validation_data)))
checkpoint_filepath = 'weights_{epoch:03d}_{val_loss:.8f}.hdf5'
else:
checkpoint_filepath = 'weights_{epoch:03d}_{loss:.8f}.hdf5'
output_dir = pathlib.Path(args.output_dir)
output_dir.mkdir(parents=True, exist_ok=True)
print('Training RCAN model')
model.fit_generator(
training_data,
epochs=config['epochs'],
steps_per_epoch=config['steps_per_epoch'],
validation_data=validation_data,
validation_steps=config['steps_per_epoch'],
verbose=0,
callbacks=[
keras.callbacks.LearningRateScheduler(
staircase_exponential_decay(config['epochs'] // 4)),
keras.callbacks.ModelCheckpoint(
str(output_dir / checkpoint_filepath),
monitor='loss' if validation_data is None else 'val_loss',
save_best_only=True),
keras.callbacks.TensorBoard(log_dir=str(output_dir),
write_graph=False),
TqdmCallback(tqdm_class=tqdm)
])
