def train(self, train_dir, vocabulary, test_dir=None, callbacks=None,
nn_model=NN_ARCHITECTURE, batch_size=BATCH_SIZE,
nb_epochs=NB_EPOCHS, verbose=1):
"""
Train the model on given data
:param train_dir: directory with data files. Text files should end with
'.txt' and corresponding files containing labels should end with '.lab'
:param vocabulary: iterable containing all considered labels
:param test_dir: directory with test files. They will be used to evaluate
the model after every epoch of training.
:param callbacks: objects passed to the Keras fit function as callbacks
:param nn_model: string defining the NN architecture e.g. 'crnn'
:param batch_size: size of one batch
:param nb_epochs: number of epochs to train
:param verbose: 0, 1 or 2. As in Keras.
:return: History object
"""
if not self.word2vec_model:
print('word2vec model is not trained. Run train_word2vec() first.')
return
if not self.scaler:
print('The scaler is not trained. Run fit_scaler() first.')
return
if self.keras_model:
print('WARNING! Overwriting already trained Keras model.')
self.labels = vocabulary
self.keras_model = get_nn_model(nn_model, output_length=len(vocabulary))
(x_train, y_train), test_data = get_data_for_model(
train_dir,
vocabulary,
test_dir=test_dir,
nn_model=self.keras_model,
as_generator=False,
batch_size=batch_size,
word2vec_model=self.word2vec_model,
scaler=self.scaler,
)
return self.keras_model.fit(
x_train,
y_train,
batch_size=batch_size,
nb_epoch=nb_epochs,
show_accuracy=True,
validation_data=test_data,
callbacks=callbacks or [],
verbose=verbose,
)
def batch_train(nb_epochs=NB_EPOCHS, batch_size=BATCH_SIZE, nn='berger_cnn',
nb_worker=1, verbose=1):
"""
Train a NN model out-of-core with given parameters.
:param nb_epochs: number of epochs
:param batch_size: size of one batch
:param nn: nn type, for supported ones look at `get_nn_model()`
:param nb_worker: number of workers to read the data
:param verbose: verbosity flag
:return: tuple containing a history object and a trained keras model
"""
model = get_nn_model(nn)
train_generator, (x_test, y_test) = get_data_for_model(
model,
as_generator=True,
batch_size=batch_size,
train_dir=HEP_TRAIN_PATH,
test_dir=HEP_TEST_PATH,
)
# Create callbacks
logger = CustomLogger(x_test, y_test, nn)
model_checkpoint = ModelCheckpoint(
os.path.join(logger.log_dir, 'keras_model'),
save_best_only=True,
)
history = model.fit_generator(
train_generator,
len({filename[:-4] for filename in os.listdir(HEP_TRAIN_PATH)}),
nb_epochs,
show_accuracy=True,
validation_data=(x_test, y_test),
callbacks=[logger, model_checkpoint],
nb_worker=nb_worker,
verbose=verbose,
)
finish_logging(logger, history)
return history, model
def train(nb_epochs=NB_EPOCHS, batch_size=BATCH_SIZE, nn='berger_cnn', verbose=1):
"""
Train a NN model with given parameters, all in memory
:param nb_epochs: number of epochs
:param batch_size: size of one batch
:param nn: nn type, for supported ones look at `get_nn_model()`
:param verbose: verbosity flag
:return: tuple containing a history object and a trained keras model
"""
model = get_nn_model(nn)
(x_train, y_train), (x_test, y_test) = get_data_for_model(
model,
as_generator=False,
train_dir=HEP_TRAIN_PATH,
test_dir=HEP_TEST_PATH,
)
# Create callbacks
logger = CustomLogger(x_test, y_test, nn)
model_checkpoint = ModelCheckpoint(
os.path.join(logger.log_dir, 'keras_model'),
save_best_only=True,
)
history = model.fit(
x_train,
y_train,
batch_size=batch_size,
nb_epoch=nb_epochs,
show_accuracy=True,
validation_data=(x_test, y_test),
callbacks=[logger, model_checkpoint],
verbose=verbose,
)
finish_logging(logger, history)
return history, model
def train(self, train_dir, vocabulary, test_dir=None, callbacks=None,
nn_model=NN_ARCHITECTURE, batch_size=BATCH_SIZE, test_ratio=0.0,
epochs=EPOCHS, verbose=1, logdir= None, optimizer='Adam'):
"""
Train the model on given data根据给定数据训练模型
:param train_dir: directory with data files. Text files should end with
'.txt' and corresponding files containing labels should end with '.lab'带有数据文件的目录。文本文件应以结尾“.txt”和包含标签的相应文件应以“.lab”结尾。
:param vocabulary: iterable containing all considered labels可包含所有考虑的标签
:param test_dir: directory with test files. They will be used to evaluate
the model after every epoch of training.带有测试文件的目录。它们将用于评估每一个训练时代之后的模型。
:param callbacks: objects passed to the Keras fit function as callbacks作为回调传递给keras fit函数的对象
:param nn_model: string defining the NN architecture e.g. 'crnn'定义nn架构的字符串，例如“crnn”
:param batch_size: size of one batch一批的大小
:param test_ratio: the ratio of samples that will be withheld from training
and used for testing. This can be overridden by test_dir.不接受培训的样本比率用于测试。这可以被test_dir覆盖。
:param epochs: number of epochs to train要培训的时段数
:param verbose: 0, 1 or 2. As in Keras.0、1或2。和Keras一样。
:return: History object历史记录对象
"""
if not self.word2vec_model:
raise RuntimeError('word2vec model is not trained. ' + \
'Run train_word2vec() first.')
if not self.scaler:
raise RuntimeError('The scaler is not trained. ' + \
'Run fit_scaler() first.')
if not os.path.isdir(train_dir):
raise ValueError('The training directory ' + train_dir + \
' does not exist')
if test_dir and not os.path.isdir(test_dir):
raise ValueError('The test directory ' + test_dir + \
' does not exist')
if self.keras_model:
print('WARNING! Overwriting already trained Keras model.',
file=sys.stderr)
self.labels = vocabulary
self.keras_model = get_nn_model(
nn_model,
embedding=self.word2vec_model.vector_size,
output_length=len(vocabulary),
optimizer=optimizer #这个参数是我从方法中提出来的
)
(x_train, y_train), test_data = get_data_for_model(
train_dir,
vocabulary,
test_dir=test_dir,
nn_model=self.keras_model,
as_generator=False,
batch_size=batch_size,
word2vec_model=self.word2vec_model,
scaler=self.scaler,
)
keras_model = self.keras_model.fit(
x_train,
y_train,
batch_size=batch_size,
epochs=epochs,
validation_data=test_data,
validation_split=test_ratio,
callbacks=callbacks or [],
verbose=verbose,
)
#logdir保存日志的文件位置
if logdir:
with open(logdir, 'w') as f:
f.write(str(keras_model.history))
return keras_model
def batch_train(self, train_dir, vocabulary, test_dir=None, callbacks=None,
nn_model=NN_ARCHITECTURE, batch_size=BATCH_SIZE,
epochs=EPOCHS, verbose=1):
"""
Train the model on given data
:param train_dir: directory with data files. Text files should end with
'.txt' and corresponding files containing labels should end with '.lab'
:param vocabulary: iterable containing all considered labels
:param test_dir: directory with test files. They will be used to evaluate
the model after every epoch of training.
:param callbacks: objects passed to the Keras fit function as callbacks
:param nn_model: string defining the NN architecture e.g. 'crnn'
:param batch_size: size of one batch
:param epochs: number of epochs to train
:param verbose: 0, 1 or 2. As in Keras.
:return: History object
根据给定数据训练模型
：param train_dir：带有数据文件的目录。文本文件应以结尾
“.txt”和包含标签的相应文件应以“.lab”结尾。
：参数词汇：可包含所有考虑的标签
：param test_dir：带有测试文件的目录。它们将用于评估
每一个训练时代之后的模型。
：param callbacks：作为回调传递给keras fit函数的对象
：param nn_model：定义nn架构的字符串，例如“crnn”
：param batch_size：一批的大小
：param epochs：要培训的时段数
：param verbose:0、1或2。和Keras一样。
：返回：历史记录对象
"""
if not self.word2vec_model:
raise RuntimeError('word2vec model is not trained. ' + \
'Run train_word2vec() first.')
if not self.scaler:
raise RuntimeError('The scaler is not trained. ' + \
'Run fit_scaler() first.')
if not os.path.isdir(train_dir):
raise ValueError('The training directory ' + train_dir + \
' does not exist')
if test_dir and not os.path.isdir(test_dir):
raise ValueError('The test directory ' + test_dir + \
' does not exist')
if self.keras_model:
print('WARNING! Overwriting already trained Keras model.',
file=sys.stderr)
self.labels = vocabulary
self.keras_model = get_nn_model(
nn_model,
embedding=self.word2vec_model.vector_size,
output_length=len(vocabulary)
)
train_generator, test_data = get_data_for_model(
train_dir,
vocabulary,
test_dir=test_dir,
nn_model=self.keras_model,
as_generator=True,
batch_size=batch_size,
word2vec_model=self.word2vec_model,
scaler=self.scaler,
)
nb_of_files = len({filename[:-4] for filename in os.listdir(train_dir)})
steps_per_epoch = math.ceil(nb_of_files / batch_size)
return self.keras_model.fit_generator(
train_generator,
steps_per_epoch=steps_per_epoch,
epochs=epochs,
validation_data=test_data,
callbacks=callbacks or [],
verbose=verbose,
)
def train(self, train_dir, vocabulary, test_dir=None, callbacks=None,
nn_model=NN_ARCHITECTURE, batch_size=BATCH_SIZE, test_ratio=0.0,
epochs=EPOCHS, verbose=1):
"""
Train the model on given data
:param train_dir: directory with data files. Text files should end with
'.txt' and corresponding files containing labels should end with '.lab'
:param vocabulary: iterable containing all considered labels
:param test_dir: directory with test files. They will be used to evaluate
the model after every epoch of training.
:param callbacks: objects passed to the Keras fit function as callbacks
:param nn_model: string defining the NN architecture e.g. 'crnn'
:param batch_size: size of one batch
:param test_ratio: the ratio of samples that will be withheld from training
and used for testing. This can be overridden by test_dir.
:param epochs: number of epochs to train
:param verbose: 0, 1 or 2. As in Keras.
:return: History object
"""
if not self.word2vec_model:
raise RuntimeError('word2vec model is not trained. ' + \
'Run train_word2vec() first.')
if not self.scaler:
raise RuntimeError('The scaler is not trained. ' + \
'Run fit_scaler() first.')
if not os.path.isdir(train_dir):
raise ValueError('The training directory ' + train_dir + \
' does not exist')
if test_dir and not os.path.isdir(test_dir):
raise ValueError('The test directory ' + test_dir + \
' does not exist')
if self.keras_model:
print('WARNING! Overwriting already trained Keras model.',
file=sys.stderr)
self.labels = vocabulary
self.keras_model = get_nn_model(
nn_model,
embedding=self.word2vec_model.vector_size,
output_length=len(vocabulary)
)
(x_train, y_train), test_data = get_data_for_model(
train_dir,
vocabulary,
test_dir=test_dir,
nn_model=self.keras_model,
as_generator=False,
batch_size=batch_size,
word2vec_model=self.word2vec_model,
scaler=self.scaler,
)
return self.keras_model.fit(
x_train,
y_train,
batch_size=batch_size,
epochs=epochs,
validation_data=test_data,
validation_split=test_ratio,
callbacks=callbacks or [],
verbose=verbose,
)
def batch_train(self,
train_dir,
vocabulary,
test_dir=None,
callbacks=None,
nn_model=NN_ARCHITECTURE,
batch_size=BATCH_SIZE,
nb_epochs=NB_EPOCHS,
verbose=1):
"""
Train the model on given data
:param train_dir: directory with data files. Text files should end with
'.txt' and corresponding files containing labels should end with '.lab'
:param vocabulary: iterable containing all considered labels
:param test_dir: directory with test files. They will be used to evaluate
the model after every epoch of training.
:param callbacks: objects passed to the Keras fit function as callbacks
:param nn_model: string defining the NN architecture e.g. 'crnn'
:param batch_size: size of one batch
:param nb_epochs: number of epochs to train
:param verbose: 0, 1 or 2. As in Keras.
:return: History object
"""
if not self.word2vec_model:
print('word2vec model is not trained. Run train_word2vec() first.')
return
if not self.scaler:
print('The scaler is not trained. Run fit_scaler() first.')
return
if self.keras_model:
print('WARNING! Overwriting already trained Keras model.')
self.labels = vocabulary
self.keras_model = get_nn_model(
nn_model,
embedding=self.word2vec_model.vector_size,
output_length=len(vocabulary))
train_generator, test_data = get_data_for_model(
train_dir,
vocabulary,
test_dir=test_dir,
nn_model=self.keras_model,
as_generator=True,
batch_size=batch_size,
word2vec_model=self.word2vec_model,
scaler=self.scaler,
)
return self.keras_model.fit_generator(
train_generator,
len({filename[:-4]
for filename in os.listdir(train_dir)}),
nb_epochs,
validation_data=test_data,
callbacks=callbacks or [],
verbose=verbose,
)
def train(
self,
train_data: DataList,
test_data: DataList,
labels,
callbacks=None,
nn_model=NN_ARCHITECTURE,
batch_size=BATCH_SIZE,
test_ratio=0.0,
epochs=EPOCHS,
verbose=1):
"""
Train the model on given data
:param train_dir: directory with data files. Text files should end with
'.txt' and corresponding files containing labels should end with '.lab'
:param vocabulary: iterable containing all considered labels
:param test_dir: directory with test files. They will be used to evaluate
the model after every epoch of training.
:param callbacks: objects passed to the Keras fit function as callbacks
:param nn_model: string defining the NN architecture e.g. 'crnn'
:param batch_size: size of one batch
:param test_ratio: the ratio of samples that will be withheld from training
and used for testing. This can be overridden by test_dir.
:param epochs: number of epochs to train
:param verbose: 0, 1 or 2. As in Keras.
:return: History object
"""
set_tf_growth()
if not self.word2vec_model:
raise RuntimeError('word2vec model is not trained. ' +
'Run train_word2vec() first.')
if not self.scaler:
raise RuntimeError('The scaler is not trained. ' +
'Run fit_scaler() first.')
if self.keras_model:
print('WARNING! Overwriting already trained Keras model.',
file=sys.stderr)
self.labels = labels
self.keras_model = get_nn_model(
nn_model,
embedding=self.word2vec_model.vector_size,
output_length=len(self.labels)
)
regression = nn_model == 'cnn_regression' # TODO make this more general
self.training_set = set([example['text'] for example in train_data])
(x_train, y_train), test_data_matrix = get_data_for_model(train_data,
test_data,
self.labels,
nn_model=self.keras_model,
as_generator=False,
batch_size=batch_size,
word2vec_model=self.word2vec_model,
scaler=self.scaler,
regression=regression
)
return self.keras_model.fit(
x_train,
y_train,
batch_size=batch_size,
epochs=epochs,
validation_data=test_data_matrix,
# TODO make validation data optional for speedup
callbacks=callbacks or [],
verbose=verbose,
)