run_tf_multiple_choice.py
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Created: Sat, Jul 20, 17:12

run_tf_multiple_choice.py
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	#!/usr/bin/env python
	# coding=utf-8
	# Copyright 2018 The Google AI Language Team Authors and The HuggingFace Inc. team.
	# Copyright (c) 2018, NVIDIA CORPORATION. All rights reserved.
	#
	# Licensed under the Apache License, Version 2.0 (the "License");
	# you may not use this file except in compliance with the License.
	# You may obtain a copy of the License at
	#
	# http://www.apache.org/licenses/LICENSE-2.0
	#
	# Unless required by applicable law or agreed to in writing, software
	# distributed under the License is distributed on an "AS IS" BASIS,
	# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
	# See the License for the specific language governing permissions and
	# limitations under the License.
	""" Finetuning the library models for multiple choice (Bert, Roberta, XLNet)."""


	import logging
	import os
	from dataclasses import dataclass, field
	from typing import Dict, Optional

	import numpy as np

	from transformers import (
	AutoConfig,
	AutoTokenizer,
	EvalPrediction,
	HfArgumentParser,
	TFAutoModelForMultipleChoice,
	TFTrainer,
	TFTrainingArguments,
	set_seed,
	)
	from transformers.utils import logging as hf_logging
	from utils_multiple_choice import Split, TFMultipleChoiceDataset, processors


	hf_logging.set_verbosity_info()
	hf_logging.enable_default_handler()
	hf_logging.enable_explicit_format()


	logger = logging.getLogger(__name__)


	def simple_accuracy(preds, labels):
	return (preds == labels).mean()


	@dataclass
	class ModelArguments:
	"""
	Arguments pertaining to which model/config/tokenizer we are going to fine-tune from.
	"""

	model_name_or_path: str = field(
	metadata={"help": "Path to pretrained model or model identifier from huggingface.co/models"}
	)
	config_name: Optional[str] = field(
	default=None, metadata={"help": "Pretrained config name or path if not the same as model_name"}
	)
	tokenizer_name: Optional[str] = field(
	default=None, metadata={"help": "Pretrained tokenizer name or path if not the same as model_name"}
	)
	cache_dir: Optional[str] = field(
	default=None,
	metadata={"help": "Where do you want to store the pretrained models downloaded from huggingface.co"},
	)


	@dataclass
	class DataTrainingArguments:
	"""
	Arguments pertaining to what data we are going to input our model for training and eval.
	"""

	task_name: str = field(metadata={"help": "The name of the task to train on: " + ", ".join(processors.keys())})
	data_dir: str = field(metadata={"help": "Should contain the data files for the task."})
	max_seq_length: int = field(
	default=128,
	metadata={
	"help": "The maximum total input sequence length after tokenization. Sequences longer "
	"than this will be truncated, sequences shorter will be padded."
	},
	)
	overwrite_cache: bool = field(
	default=False, metadata={"help": "Overwrite the cached training and evaluation sets"}
	)


	def main():
	# See all possible arguments in src/transformers/training_args.py
	# or by passing the --help flag to this script.
	# We now keep distinct sets of args, for a cleaner separation of concerns.

	parser = HfArgumentParser((ModelArguments, DataTrainingArguments, TFTrainingArguments))
	model_args, data_args, training_args = parser.parse_args_into_dataclasses()

	if (
	os.path.exists(training_args.output_dir)
	and os.listdir(training_args.output_dir)
	and training_args.do_train
	and not training_args.overwrite_output_dir
	):
	raise ValueError(
	f"Output directory ({training_args.output_dir}) already exists and is not empty. Use --overwrite_output_dir to overcome."
	)

	# Setup logging
	logging.basicConfig(
	format="%(asctime)s - %(levelname)s - %(name)s - %(message)s",
	datefmt="%m/%d/%Y %H:%M:%S",
	level=logging.INFO,
	)
	logger.warning(
	"device: %s, n_replicas: %s, 16-bits training: %s",
	training_args.device,
	training_args.n_replicas,
	training_args.fp16,
	)
	logger.info("Training/evaluation parameters %s", training_args)

	# Set seed
	set_seed(training_args.seed)

	try:
	processor = processors[data_args.task_name]()
	label_list = processor.get_labels()
	num_labels = len(label_list)
	except KeyError:
	raise ValueError("Task not found: %s" % (data_args.task_name))

	# Load pretrained model and tokenizer
	#
	# Distributed training:
	# The .from_pretrained methods guarantee that only one local process can concurrently
	# download model & vocab.
	config = AutoConfig.from_pretrained(
	model_args.config_name if model_args.config_name else model_args.model_name_or_path,
	num_labels=num_labels,
	finetuning_task=data_args.task_name,
	cache_dir=model_args.cache_dir,
	)
	tokenizer = AutoTokenizer.from_pretrained(
	model_args.tokenizer_name if model_args.tokenizer_name else model_args.model_name_or_path,
	cache_dir=model_args.cache_dir,
	)
	with training_args.strategy.scope():
	model = TFAutoModelForMultipleChoice.from_pretrained(
	model_args.model_name_or_path,
	from_pt=bool(".bin" in model_args.model_name_or_path),
	config=config,
	cache_dir=model_args.cache_dir,
	)
	# Get datasets
	train_dataset = (
	TFMultipleChoiceDataset(
	data_dir=data_args.data_dir,
	tokenizer=tokenizer,
	task=data_args.task_name,
	max_seq_length=data_args.max_seq_length,
	overwrite_cache=data_args.overwrite_cache,
	mode=Split.train,
	)
	if training_args.do_train
	else None
	)
	eval_dataset = (
	TFMultipleChoiceDataset(
	data_dir=data_args.data_dir,
	tokenizer=tokenizer,
	task=data_args.task_name,
	max_seq_length=data_args.max_seq_length,
	overwrite_cache=data_args.overwrite_cache,
	mode=Split.dev,
	)
	if training_args.do_eval
	else None
	)

	def compute_metrics(p: EvalPrediction) -> Dict:
	preds = np.argmax(p.predictions, axis=1)
	return {"acc": simple_accuracy(preds, p.label_ids)}

	# Initialize our Trainer
	trainer = TFTrainer(
	model=model,
	args=training_args,
	train_dataset=train_dataset.get_dataset() if train_dataset else None,
	eval_dataset=eval_dataset.get_dataset() if eval_dataset else None,
	compute_metrics=compute_metrics,
	)

	# Training
	if training_args.do_train:
	trainer.train()
	trainer.save_model()
	tokenizer.save_pretrained(training_args.output_dir)
	# Evaluation
	results = {}
	if training_args.do_eval:
	logger.info("* Evaluate *")

	result = trainer.evaluate()

	output_eval_file = os.path.join(training_args.output_dir, "eval_results.txt")
	with open(output_eval_file, "w") as writer:
	logger.info("*** Eval results ***")
	for key, value in result.items():
	logger.info(" %s = %s", key, value)
	writer.write("%s = %s\n" % (key, value))

	results.update(result)

	return results


	if __name__ == "__main__":
	main()

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