def __init__(self):
self.bert_config = run_classifier.modeling.BertConfig.from_json_file(
bert_config_file)
self.tokenizer = tokenization.FullTokenizer(
vocab_file=vocab_file, do_lower_case=is_lower_case)
self.is_per_host = tf.contrib.tpu.InputPipelineConfig.PER_HOST_V2
self.run_config = tf.contrib.tpu.RunConfig(
cluster=tpu_cluster_resolver,
model_dir=OUTPUT_DIR,
save_checkpoints_steps=SAVE_CHECKPOINTS_STEPS,
tpu_config=tf.contrib.tpu.TPUConfig(
iterations_per_loop=ITERATIONS_PER_LOOP,
num_shards=NUM_TPU_CORES,
per_host_input_for_training=tf.contrib.tpu.InputPipelineConfig.
PER_HOST_V2))
self.model_fn = run_classifier.model_fn_builder(
bert_config=self.bert_config,
num_labels=len(label_list),
init_checkpoint=init_checkpoint,
learning_rate=5e-5,
num_train_steps=None,
num_warmup_steps=None,
use_tpu=False,
use_one_hot_embeddings=False)
self.estimator = tf.contrib.tpu.TPUEstimator(
use_tpu=False,
model_fn=self.model_fn,
config=self.run_config,
train_batch_size=BATCH_SIZE,
eval_batch_size=BATCH_SIZE,
predict_batch_size=BATCH_SIZE)
def get_tpu_estimator(model_dir, train_epochs, size_train_set, batch_size,
num_labels, classifier_model_fn):
bert_pretrained_dir = f'{model_dir}/uncased_L-12_H-768_A-12'
config_file = os.path.join(bert_pretrained_dir, 'bert_config.json')
init_checkpoint = os.path.join(bert_pretrained_dir, 'bert_model.ckpt')
tpu_cluster_resolver = None
run_config = tf.contrib.tpu.RunConfig(
cluster=tpu_cluster_resolver,
model_dir=model_dir,
save_checkpoints_steps=SAVE_CHECKPOINTS_STEPS,
tpu_config=tf.contrib.tpu.TPUConfig(
iterations_per_loop=ITERATIONS_PER_LOOP,
num_shards=NUM_TPU_CORES,
per_host_input_for_training=tf.contrib.tpu.InputPipelineConfig.
PER_HOST_V2))
num_train_steps = int(size_train_set / batch_size * train_epochs)
num_warmup_steps = int(num_train_steps * WARMUP_PROPORTION)
model_fn = run_classifier.model_fn_builder(
bert_config=modeling.BertConfig.from_json_file(config_file),
num_labels=num_labels,
init_checkpoint=init_checkpoint,
learning_rate=LEARNING_RATE,
num_train_steps=num_train_steps,
num_warmup_steps=num_warmup_steps,
use_tpu=
False, # If False training will fall on CPU or GPU, depending on what is available
use_one_hot_embeddings=True,
classifier_model_fn=classifier_model_fn)
estimator = tf.contrib.tpu.TPUEstimator(
use_tpu=
False, # If False training will fall on CPU or GPU, depending on what is available
model_fn=model_fn,
config=run_config,
train_batch_size=batch_size,
eval_batch_size=batch_size)
return estimator
def main(_):
tf.logging.set_verbosity(tf.logging.INFO)
processors = {
"ylilauta": YlilautaProcessor,
"yle": YleProcessor,
}
tokenization.validate_case_matches_checkpoint(FLAGS.do_lower_case,
FLAGS.init_checkpoint)
if not FLAGS.do_train and not FLAGS.do_eval and not FLAGS.do_predict:
raise ValueError(
"At least one of `do_train`, `do_eval` or `do_predict' must be True."
)
bert_config = modeling.BertConfig.from_json_file(FLAGS.bert_config_file)
if FLAGS.max_seq_length > bert_config.max_position_embeddings:
raise ValueError(
"Cannot use sequence length %d because the BERT model "
"was only trained up to sequence length %d" %
(FLAGS.max_seq_length, bert_config.max_position_embeddings))
tf.gfile.MakeDirs(FLAGS.output_dir)
task_name = FLAGS.task_name.lower()
if task_name not in processors:
raise ValueError("Task not found: %s" % (task_name))
processor = processors[task_name]()
label_list = processor.get_labels()
tokenizer = tokenization.FullTokenizer(vocab_file=FLAGS.vocab_file,
do_lower_case=FLAGS.do_lower_case)
tpu_cluster_resolver = None
if FLAGS.use_tpu and FLAGS.tpu_name:
tpu_cluster_resolver = tf.contrib.cluster_resolver.TPUClusterResolver(
FLAGS.tpu_name, zone=FLAGS.tpu_zone, project=FLAGS.gcp_project)
is_per_host = tf.contrib.tpu.InputPipelineConfig.PER_HOST_V2
run_config = tf.contrib.tpu.RunConfig(
cluster=tpu_cluster_resolver,
master=FLAGS.master,
model_dir=FLAGS.output_dir,
save_checkpoints_steps=FLAGS.save_checkpoints_steps,
tpu_config=tf.contrib.tpu.TPUConfig(
iterations_per_loop=FLAGS.iterations_per_loop,
num_shards=FLAGS.num_tpu_cores,
per_host_input_for_training=is_per_host))
train_examples = None
num_train_steps = None
num_warmup_steps = None
if FLAGS.do_train:
train_examples = processor.get_train_examples(FLAGS.data_dir)
num_train_steps = int(
len(train_examples) / FLAGS.train_batch_size *
FLAGS.num_train_epochs)
num_warmup_steps = int(num_train_steps * FLAGS.warmup_proportion)
model_fn = model_fn_builder(bert_config=bert_config,
num_labels=len(label_list),
init_checkpoint=FLAGS.init_checkpoint,
learning_rate=FLAGS.learning_rate,
num_train_steps=num_train_steps,
num_warmup_steps=num_warmup_steps,
use_tpu=FLAGS.use_tpu,
use_one_hot_embeddings=FLAGS.use_tpu)
# If TPU is not available, this will fall back to normal Estimator on CPU
# or GPU.
estimator = tf.contrib.tpu.TPUEstimator(
use_tpu=FLAGS.use_tpu,
model_fn=model_fn,
config=run_config,
train_batch_size=FLAGS.train_batch_size,
eval_batch_size=FLAGS.eval_batch_size,
predict_batch_size=FLAGS.predict_batch_size)
if FLAGS.do_train:
train_file = os.path.join(FLAGS.output_dir, "train.tf_record")
file_based_convert_examples_to_features(train_examples, label_list,
FLAGS.max_seq_length,
tokenizer, train_file)
tf.logging.info("***** Running training *****")
tf.logging.info(" Num examples = %d", len(train_examples))
tf.logging.info(" Batch size = %d", FLAGS.train_batch_size)
tf.logging.info(" Num steps = %d", num_train_steps)
train_input_fn = file_based_input_fn_builder(
input_file=train_file,
seq_length=FLAGS.max_seq_length,
is_training=True,
drop_remainder=True)
estimator.train(input_fn=train_input_fn, max_steps=num_train_steps)
if FLAGS.do_eval:
eval_examples = processor.get_dev_examples(FLAGS.data_dir)
num_actual_eval_examples = len(eval_examples)
if FLAGS.use_tpu:
# TPU requires a fixed batch size for all batches, therefore the number
# of examples must be a multiple of the batch size, or else examples
# will get dropped. So we pad with fake examples which are ignored
# later on. These do NOT count towards the metric (all tf.metrics
# support a per-instance weight, and these get a weight of 0.0).
while len(eval_examples) % FLAGS.eval_batch_size != 0:
eval_examples.append(PaddingInputExample())
eval_file = os.path.join(FLAGS.output_dir, "eval.tf_record")
file_based_convert_examples_to_features(eval_examples, label_list,
FLAGS.max_seq_length,
tokenizer, eval_file)
tf.logging.info("***** Running evaluation *****")
tf.logging.info(" Num examples = %d (%d actual, %d padding)",
len(eval_examples), num_actual_eval_examples,
len(eval_examples) - num_actual_eval_examples)
tf.logging.info(" Batch size = %d", FLAGS.eval_batch_size)
# This tells the estimator to run through the entire set.
eval_steps = None
# However, if running eval on the TPU, you will need to specify the
# number of steps.
if FLAGS.use_tpu:
assert len(eval_examples) % FLAGS.eval_batch_size == 0
eval_steps = int(len(eval_examples) // FLAGS.eval_batch_size)
eval_drop_remainder = True if FLAGS.use_tpu else False
eval_input_fn = file_based_input_fn_builder(
input_file=eval_file,
seq_length=FLAGS.max_seq_length,
is_training=False,
drop_remainder=eval_drop_remainder)
result = estimator.evaluate(input_fn=eval_input_fn, steps=eval_steps)
output_eval_file = os.path.join(FLAGS.output_dir, "eval_results.txt")
with tf.gfile.GFile(output_eval_file, "w") as writer:
tf.logging.info("***** Eval results *****")
for key in sorted(result.keys()):
tf.logging.info(" %s = %s", key, str(result[key]))
writer.write("%s = %s\n" % (key, str(result[key])))
# output hyperparameter values and results
print('\t'.join([
str(i) for i in [
'DEV-RESULT', 'init_checkpoint', FLAGS.init_checkpoint,
'data_dir', FLAGS.data_dir, 'max_seq_length',
FLAGS.max_seq_length, 'batch_size',
FLAGS.train_batch_size, 'learning_rate',
FLAGS.learning_rate, 'num_train_epochs',
FLAGS.num_train_epochs, key, result[key]
]
]))
if FLAGS.do_predict:
predict_examples = processor.get_test_examples(FLAGS.data_dir)
num_actual_predict_examples = len(predict_examples)
if FLAGS.use_tpu:
# TPU requires a fixed batch size for all batches, therefore the number
# of examples must be a multiple of the batch size, or else examples
# will get dropped. So we pad with fake examples which are ignored
# later on.
while len(predict_examples) % FLAGS.predict_batch_size != 0:
predict_examples.append(PaddingInputExample())
predict_file = os.path.join(FLAGS.output_dir, "predict.tf_record")
file_based_convert_examples_to_features(predict_examples, label_list,
FLAGS.max_seq_length,
tokenizer, predict_file)
tf.logging.info("***** Running prediction*****")
tf.logging.info(" Num examples = %d (%d actual, %d padding)",
len(predict_examples), num_actual_predict_examples,
len(predict_examples) - num_actual_predict_examples)
tf.logging.info(" Batch size = %d", FLAGS.predict_batch_size)
predict_drop_remainder = True if FLAGS.use_tpu else False
predict_input_fn = file_based_input_fn_builder(
input_file=predict_file,
seq_length=FLAGS.max_seq_length,
is_training=False,
drop_remainder=predict_drop_remainder)
result = estimator.predict(input_fn=predict_input_fn)
output_predict_file = os.path.join(FLAGS.output_dir,
"test_results.tsv")
with tf.gfile.GFile(output_predict_file, "w") as writer:
num_written_lines = 0
tf.logging.info("***** Predict results *****")
for (i, prediction) in enumerate(result):
probabilities = prediction["probabilities"]
if i >= num_actual_predict_examples:
break
output_line = "\t".join(
str(class_probability)
for class_probability in probabilities) + "\n"
writer.write(output_line)
num_written_lines += 1
assert num_written_lines == num_actual_predict_examples
def main(_): # NOQA
parsed_args, hparams = parse_args_and_hparams()
tf.logging.set_verbosity(tf.logging.INFO)
bert_config = modeling.BertConfig.from_json_file(hparams.bert_config_file)
tf.gfile.MakeDirs(parsed_args.output_dir)
if hparams.data_regime == "full":
train_file = "train"
elif hparams.data_regime == "10":
train_file = "train_10"
elif hparams.data_regime == "30":
train_file = "train_30"
else:
tf.logging.error(f"Invalid data regime: {hparams.data_regime}")
processor = _IntentProcessor(parsed_args.data_dir, hparams.task,
train_file)
label_list = processor.get_labels()
tokenizer = tokenization.FullTokenizer(vocab_file=hparams.vocab_file,
do_lower_case=True)
tpu_cluster_resolver = None
if hparams.use_tpu and hparams.tpu_name:
tpu_cluster_resolver = tf.contrib.cluster_resolver.TPUClusterResolver(
hparams.tpu_name,
zone=hparams.tpu_zone,
project=hparams.gcp_project)
is_per_host = tf.contrib.tpu.InputPipelineConfig.PER_HOST_V2
run_config = tf.contrib.tpu.RunConfig(
cluster=tpu_cluster_resolver,
master=None,
model_dir=parsed_args.output_dir,
save_checkpoints_steps=hparams.save_checkpoint_steps,
tpu_config=tf.contrib.tpu.TPUConfig(
iterations_per_loop=hparams.iterations_per_loop,
num_shards=hparams.num_tpu_cores,
per_host_input_for_training=is_per_host))
train_examples = None
num_train_steps = None
num_warmup_steps = None
if hparams.do_train:
train_examples = processor.get_train_examples(parsed_args.data_dir)
num_train_steps = int(
len(train_examples) / hparams.batch_size * hparams.epochs)
num_warmup_steps = int(num_train_steps * hparams.warmup_proportion)
model_fn = model_fn_builder(bert_config=bert_config,
num_labels=len(label_list),
init_checkpoint=hparams.init_checkpoint,
learning_rate=hparams.learning_rate,
num_train_steps=num_train_steps,
num_warmup_steps=num_warmup_steps,
use_tpu=hparams.use_tpu,
use_one_hot_embeddings=hparams.use_tpu)
# If TPU is not available, this will fall back to normal Estimator on CPU
# or GPU.
estimator = tf.contrib.tpu.TPUEstimator(
use_tpu=hparams.use_tpu,
model_fn=model_fn,
config=run_config,
train_batch_size=hparams.batch_size,
eval_batch_size=_EVAL_BATCH_SIZE,
predict_batch_size=_EVAL_BATCH_SIZE)
if hparams.do_train:
train_file = os.path.join(parsed_args.output_dir, "train.tf_record")
file_based_convert_examples_to_features(train_examples, label_list,
hparams.max_seq_length,
tokenizer, train_file)
tf.logging.info("***** Running training *****")
tf.logging.info(" Num examples = %d", len(train_examples))
tf.logging.info(" Batch size = %d", hparams.batch_size)
tf.logging.info(" Num steps = %d", num_train_steps)
train_input_fn = _file_based_input_fn_builder(
input_file=train_file,
seq_length=hparams.max_seq_length,
is_training=True,
drop_remainder=True)
estimator.train(input_fn=train_input_fn, max_steps=num_train_steps)
if hparams.do_eval:
eval_examples = processor.get_dev_examples(parsed_args.data_dir)
num_actual_eval_examples = len(eval_examples)
if hparams.use_tpu:
# TPU requires a fixed batch size for all batches, therefore the
# number of examples must be a multiple of the batch size, or else
# examples will get dropped. So we pad with fake examples which are
# ignored later on. These do NOT count towards the metric (all
# tf.metrics support a per-instance weight, and these get a weight
# of 0.0).
while len(eval_examples) % _EVAL_BATCH_SIZE != 0:
eval_examples.append(PaddingInputExample())
eval_file = os.path.join(parsed_args.output_dir, "eval.tf_record")
file_based_convert_examples_to_features(eval_examples, label_list,
hparams.max_seq_length,
tokenizer, eval_file)
tf.logging.info("***** Running evaluation *****")
tf.logging.info(" Num examples = %d (%d actual, %d padding)",
len(eval_examples), num_actual_eval_examples,
len(eval_examples) - num_actual_eval_examples)
tf.logging.info(" Batch size = %d", _EVAL_BATCH_SIZE)
# This tells the estimator to run through the entire set.
eval_steps = None
# However, if running eval on the TPU, you will need to specify the
# number of steps.
if hparams.use_tpu:
assert len(eval_examples) % _EVAL_BATCH_SIZE == 0
eval_steps = int(len(eval_examples) // _EVAL_BATCH_SIZE)
eval_drop_remainder = True if hparams.use_tpu else False
eval_input_fn = _file_based_input_fn_builder(
input_file=eval_file,
seq_length=hparams.max_seq_length,
is_training=False,
drop_remainder=eval_drop_remainder)
result = estimator.evaluate(input_fn=eval_input_fn, steps=eval_steps)
output_eval_file = os.path.join(parsed_args.output_dir,
"eval_results.txt")
with tf.gfile.GFile(output_eval_file, "w") as writer:
tf.logging.info("***** Eval results *****")
for key in sorted(result.keys()):
tf.logging.info(" %s = %s", key, str(result[key]))
writer.write("%s = %s\n" % (key, str(result[key])))
def finetune(config, bucket_path, input_dir, model_dir, output_dir, vocab_file,
tpu_name):
processor = run_classifier.MrpcProcessor()
label_list = processor.get_labels()
BERT_GCS_DIR = "{}/{}".format(bucket_path, model_dir)
BERT_DATA_DIR = "{}/{}".format(bucket_path, input_dir)
BERT_OUT_DIR = "{}/{}".format(bucket_path, output_dir)
INIT_CHECKPOINT = tf.train.latest_checkpoint(BERT_GCS_DIR)
CONFIG_FILE = os.path.join(BERT_GCS_DIR, "bert_config.json")
VOCAB_FILE = os.path.join(BERT_GCS_DIR, vocab_file)
# Compute number of train and warmup steps from batch size
train_examples = processor.get_train_examples(BERT_DATA_DIR)
num_train_steps = int(
len(train_examples) / int(config["train_batch_size"]) *
float(config["num_train_epochs"]))
num_warmup_steps = int(num_train_steps *
float(config["warmup_proportion"]))
train_batch_size = int(config["train_batch_size"])
eval_batch_size = int(config["eval_batch_size"])
predict_batch_size = int(config["predict_batch_size"])
do_lowercase = bool(config["do_lowercase"])
max_sequence_length = int(config["max_seq_length"])
bert_config = modeling.BertConfig.from_json_file(CONFIG_FILE)
tpu_cluster_resolver = tf.contrib.cluster_resolver.TPUClusterResolver(
tpu_name)
model_fn = run_classifier.model_fn_builder(
bert_config=bert_config,
num_labels=len(label_list),
init_checkpoint=INIT_CHECKPOINT,
learning_rate=float(config["learning_rate"]),
num_train_steps=num_train_steps,
num_warmup_steps=num_warmup_steps,
use_tpu=True,
use_one_hot_embeddings=True)
estimator = tf.contrib.tpu.TPUEstimator(
use_tpu=True,
model_fn=model_fn,
config=get_run_config(BERT_OUT_DIR, tpu_cluster_resolver, config),
train_batch_size=train_batch_size,
eval_batch_size=eval_batch_size,
predict_batch_size=predict_batch_size)
tokenizer = tokenization.FullTokenizer(vocab_file=VOCAB_FILE,
do_lower_case=do_lowercase)
train_features = run_classifier.convert_examples_to_features(
train_examples, label_list, max_sequence_length, tokenizer)
print('***** Started training at {} *****'.format(datetime.datetime.now()))
print(' Num examples = {}'.format(len(train_examples)))
print(' Batch size = {}'.format(train_batch_size))
tf.logging.info(" Num steps = %d", num_train_steps)
train_input_fn = run_classifier.input_fn_builder(
features=train_features,
seq_length=max_sequence_length,
is_training=True,
drop_remainder=True)
estimator.train(input_fn=train_input_fn, max_steps=num_train_steps)
print('***** Finished training at {} *****'.format(
datetime.datetime.now()))
model_eval(estimator, processor, BERT_DATA_DIR, label_list,
max_sequence_length, tokenizer, eval_batch_size, BERT_OUT_DIR)
model_predict(estimator, processor, BERT_DATA_DIR, predict_batch_size,
label_list, max_sequence_length, tokenizer)
def classify(
data_dir:str,#The input data dir. Should contain the .tsv files (or other data files)
bert_config_file:str,#The config json file corresponding to the pre-trained BERT model.
vocab_file:str,#The vocabulary file that the BERT model was trained on.
output_dir:str,#The output directory where the model checkpoints will be written.
#unnecessary parameters
task_name:str='customer_task',
labels:list=None,#a list of all labels
init_checkpoint:str=None,#Initial checkpoint (usually from a pre-trained BERT model).
do_lower_case:bool=True,#Whether to lower case the input text.
#Should be True for uncased models and False for cased models.
max_seq_length:int=128,#The maximum total input sequence length after WordPiece tokenization.
#Sequences longer than this will be truncated, and sequences shorter than this will be padded.
do_train:bool=False,#Whether to run training.
do_eval:bool=False,#Whether to run eval on the dev set.
do_predict:bool=False,#Whether to run the model in inference mode on the test set.
train_batch_size:int=32,#Total batch size for training.
eval_batch_size:int=8,#Total batch size for eval.
predict_batch_size:int=5,#Total batch size for predict.
learning_rate:float=5e-5,#The initial learning rate for Adam.
num_train_epochs:float=3.0,#Total number of training epochs to perform.
warmup_proportion:float=0.1,#Proportion of training to perform linear learning rate warmup for.
#E.g., 0.1 = 10% of training.
save_checkpoints_steps:int=1000,#How often to save the model checkpoint.
iterations_per_loop:int=1000,#How many steps to make in each estimator call.
use_tpu:bool=False,#Whether to use TPU or GPU/CPU.
tpu_name:str=None,#The Cloud TPU to use for training. This should be either the name
#used when creating the Cloud TPU, or a grpc://ip.address.of.tpu:8470 url.
tpu_zone:str=None,#[Optional] GCE zone where the Cloud TPU is located in. If not
#specified, we will attempt to automatically detect the GCE project from metadata.
gcp_project:str=None,#[Optional] Project name for the Cloud TPU-enabled project. If not
#specified, we will attempt to automatically detect the GCE project from metadata.
master:str=None,#[Optional] TensorFlow master URL.
num_tpu_cores:int=8#Only used if `use_tpu` is True. Total number of TPU cores to use.
):
tf.logging.set_verbosity(tf.logging.INFO)
processors={
"cola": brc.ColaProcessor,
"mnli": brc.MnliProcessor,
"mrpc": brc.MrpcProcessor,
"xnli": brc.XnliProcessor,
}
#设置参数do_lower_case和init_checkpoint
bert.tokenization.validate_case_matches_checkpoint(do_lower_case,init_checkpoint)
#参数do_train、do_eval和do_predict至少有其一为真
if not do_train and not do_eval and not do_predict:
raise ValueError("At least one of 'do_train', 'do_eval' or 'do_predict' must be True.")
#加载BERT模型的配置文件
bert_config=bert.modeling.BertConfig.from_json_file(bert_config_file)
#最大序列长度
if max_seq_length>bert_config.max_position_embeddings:
raise ValueError(
"Cannot use sequence length %d because the BERT model was only trained up to sequence length %d"%
(max_seq_length,bert_config.max_position_embeddings))
#确保输出文件夹存在
tf.gfile.MakeDirs(output_dir)
#根据任务名选择相应的处理类
taskName=task_name.lower()
if taskName=='customer_task':
processor=CUserLabelTaskProcessor(labels)
else:
if taskName not in processors:
raise ValueError('Task not found: %s'%(taskName))
processor=processors[taskName]()
label_list=processor.get_labels()
#print(label_list)
#分词器设置
tokenizer=bert.tokenization.FullTokenizer(vocab_file=vocab_file,do_lower_case=do_lower_case)
#显卡相关
tpu_cluster_resolver=None
if use_tpu and tpu_name:
tpu_cluster_resolver=tf.contrib.cluster_resolver.TPUClusterResolver(tpu_name,zone=gcp_project)
is_per_host=tf.contrib.tpu.InputPipelineConfig.PER_HOST_V2
run_config=tf.contrib.tpu.RunConfig(
cluster=tpu_cluster_resolver,
master=master,
model_dir=output_dir,
save_checkpoints_steps=save_checkpoints_steps,
tpu_config=tf.contrib.tpu.TPUConfig(
iterations_per_loop=iterations_per_loop,
num_shards=num_tpu_cores,
per_host_input_for_training=is_per_host))
#训练参数
train_examples=None
num_train_steps=None
num_warmup_steps=None
if do_train:
train_examples=processor.get_train_examples(data_dir)
num_train_steps=int(len(train_examples)/train_batch_size*num_train_epochs)
num_warmup_steps=int(num_train_steps*warmup_proportion)
model_fn=brc.model_fn_builder(
bert_config=bert_config,
num_labels=len(label_list),
init_checkpoint=init_checkpoint,
learning_rate=learning_rate,
num_train_steps=num_train_steps,
num_warmup_steps=num_warmup_steps,
use_tpu=use_tpu,
use_one_hot_embeddings=use_tpu)
#使用TPU
# If TPU is not available, this will fall back to normal Estimator on CPU or GPU.
estimator=tf.contrib.tpu.TPUEstimator(
use_tpu=use_tpu,
model_fn=model_fn,
config=run_config,
train_batch_size=train_batch_size,
eval_batch_size=eval_batch_size,
predict_batch_size=predict_batch_size)
if do_train:
train_file=os.path.join(output_dir,"train.tf_record")
brc.file_based_convert_examples_to_features(train_examples, label_list, max_seq_length, tokenizer, train_file)
tf.logging.info("***** Running training *****")
tf.logging.info(" Num examples = %d", len(train_examples))
tf.logging.info(" Batch size = %d", train_batch_size)
tf.logging.info(" Num steps = %d", num_train_steps)
train_input_fn=brc.file_based_input_fn_builder(input_file=train_file,seq_length=max_seq_length,is_training=True,drop_remainder=True)
estimator.train(input_fn=train_input_fn,max_steps=num_train_steps)
if do_eval:
eval_examples=processor.get_dev_examples(data_dir)
num_actual_eval_examples=len(eval_examples)
if use_tpu:
# TPU requires a fixed batch size for all batches, therefore the number
# of examples must be a multiple of the batch size, or else examples
# will get dropped. So we pad with fake examples which are ignored
# later on. These do NOT count towards the metric (all tf.metrics
# support a per-instance weight, and these get a weight of 0.0).
while len(eval_examples)%eval_batch_size!=0:
eval_examples.append(brc.PaddingInputExample())
eval_file=os.path.join(output_dir,"eval.tf_record")
brc.file_based_convert_examples_to_features(eval_examples, label_list, max_seq_length, tokenizer, eval_file)
tf.logging.info("***** Running evaluation *****")
tf.logging.info(" Num examples = %d (%d actual, %d padding)",len(eval_examples), num_actual_eval_examples,len(eval_examples) - num_actual_eval_examples)
tf.logging.info(" Batch size = %d", eval_batch_size)
# This tells the estimator to run through the entire set.
eval_steps = None
# However, if running eval on the TPU, you will need to specify the number of steps.
if use_tpu:
assert len(eval_example)%eval_batch_size==0
eval_steps=int(len(eval_examples)//eval_batch_size)
eval_drop_remainder = True if use_tpu else False
eval_input_fn=brc.file_based_input_fn_builder(
input_file=eval_file,seq_length=max_seq_length,is_training=False,drop_remainder=eval_drop_remainder)
result = estimator.evaluate(input_fn=eval_input_fn, steps=eval_steps)
output_eval_file = os.path.join(output_dir, "eval_results.txt")
with tf.gfile.GFile(output_eval_file, "w") as writer:
tf.logging.info("***** Eval results *****")
for key in sorted(result.keys()):
tf.logging.info(" %s = %s", key, str(result[key]))
writer.write("%s = %s\n" % (key, str(result[key])))
if do_predict:
predict_examples = processor.get_test_examples(data_dir)
num_actual_predict_examples = len(predict_examples)
if use_tpu:
# TPU requires a fixed batch size for all batches, therefore the number
# of examples must be a multiple of the batch size, or else examples
# will get dropped. So we pad with fake examples which are ignored
# later on.
while len(predict_examples) % predict_batch_size != 0:
predict_examples.append(brc.PaddingInputExample())
predict_file = os.path.join(output_dir, "predict.tf_record")
brc.file_based_convert_examples_to_features(predict_examples,label_list,max_seq_length,tokenizer,predict_file)
tf.logging.info("***** Running prediction*****")
tf.logging.info(" Num examples = %d (%d actual, %d padding)",len(predict_examples),
num_actual_predict_examples,len(predict_examples) - num_actual_predict_examples)
tf.logging.info(" Batch size = %d", predict_batch_size)
predict_drop_remainder = True if use_tpu else False
predict_input_fn = brc.file_based_input_fn_builder(
input_file=predict_file,seq_length=max_seq_length,is_training=False,drop_remainder=predict_drop_remainder)
result = estimator.predict(input_fn=predict_input_fn)
output_predict_file = os.path.join(output_dir, "test_results.tsv")
with tf.gfile.GFile(output_predict_file, "w") as writer:
num_written_lines = 0
tf.logging.info("***** Predict results *****")
for (i, prediction) in enumerate(result):
probabilities = prediction["probabilities"]
if i >= num_actual_predict_examples:
break
output_line = "\t".join(str(class_probability)for class_probability in probabilities) + "\n"
writer.write(output_line)
num_written_lines += 1
assert num_written_lines == num_actual_predict_examples