From 5582bc4b234a59d4a8d5c1d8cd90c4b77180cd6f Mon Sep 17 00:00:00 2001 From: erenup Date: Sun, 18 Aug 2019 16:01:48 +0800 Subject: [PATCH] add multiple choice to robreta and xlnet, test on swag, roberta=0.82.28 , xlnet=0.80 --- .../run_multiple_choice.py | 495 ++++++++++++++++++ .../utils_multiple_choice.py | 421 +++++++++++++++ pytorch_transformers/__init__.py | 3 +- pytorch_transformers/modeling_roberta.py | 40 ++ pytorch_transformers/modeling_xlnet.py | 44 ++ 5 files changed, 1002 insertions(+), 1 deletion(-) create mode 100644 examples/single_model_scripts/run_multiple_choice.py create mode 100644 examples/single_model_scripts/utils_multiple_choice.py diff --git a/examples/single_model_scripts/run_multiple_choice.py b/examples/single_model_scripts/run_multiple_choice.py new file mode 100644 index 0000000000..4d42a73f99 --- /dev/null +++ b/examples/single_model_scripts/run_multiple_choice.py @@ -0,0 +1,495 @@ +# 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, XLM, XLNet).""" + +from __future__ import absolute_import, division, print_function + +import argparse +import glob +import logging +import os +import random + + +import numpy as np +import torch +from torch.utils.data import (DataLoader, RandomSampler, SequentialSampler, + TensorDataset) +from torch.utils.data.distributed import DistributedSampler +from tensorboardX import SummaryWriter +from tqdm import tqdm, trange + +from pytorch_transformers import (WEIGHTS_NAME, BertConfig, + BertForMultipleChoice, BertTokenizer, + XLNetConfig, XLNetForMultipleChoice, + XLNetTokenizer, RobertaConfig, + RobertaForMultipleChoice, RobertaTokenizer) + +from pytorch_transformers import AdamW, WarmupLinearSchedule + +from utils_multiple_choice import (convert_examples_to_features, processors) + +logger = logging.getLogger(__name__) + +ALL_MODELS = sum((tuple(conf.pretrained_config_archive_map.keys()) for conf in (BertConfig, XLNetConfig)), ()) + +MODEL_CLASSES = { + 'bert': (BertConfig, BertForMultipleChoice, BertTokenizer), + 'xlnet': (XLNetConfig, XLNetForMultipleChoice, XLNetTokenizer), + 'roberta': (RobertaConfig, RobertaForMultipleChoice, RobertaTokenizer) +} + +def select_field(features, field): + return [ + [ + choice[field] + for choice in feature.choices_features + ] + for feature in features + ] + + +def simple_accuracy(preds, labels): + return (preds == labels).mean() + + +def set_seed(args): + random.seed(args.seed) + np.random.seed(args.seed) + torch.manual_seed(args.seed) + if args.n_gpu > 0: + torch.cuda.manual_seed_all(args.seed) + + +def train(args, train_dataset, model, tokenizer): + """ Train the model """ + if args.local_rank in [-1, 0]: + tb_writer = SummaryWriter() + + args.train_batch_size = args.per_gpu_train_batch_size * max(1, args.n_gpu) + train_sampler = RandomSampler(train_dataset) if args.local_rank == -1 else DistributedSampler(train_dataset) + train_dataloader = DataLoader(train_dataset, sampler=train_sampler, batch_size=args.train_batch_size) + + if args.max_steps > 0: + t_total = args.max_steps + args.num_train_epochs = args.max_steps // (len(train_dataloader) // args.gradient_accumulation_steps) + 1 + else: + t_total = len(train_dataloader) // args.gradient_accumulation_steps * args.num_train_epochs + + # Prepare optimizer and schedule (linear warmup and decay) + no_decay = ['bias', 'LayerNorm.weight'] + optimizer_grouped_parameters = [ + {'params': [p for n, p in model.named_parameters() if not any(nd in n for nd in no_decay)], 'weight_decay': args.weight_decay}, + {'params': [p for n, p in model.named_parameters() if any(nd in n for nd in no_decay)], 'weight_decay': 0.0} + ] + optimizer = AdamW(optimizer_grouped_parameters, lr=args.learning_rate, eps=args.adam_epsilon) + scheduler = WarmupLinearSchedule(optimizer, warmup_steps=args.warmup_steps, t_total=t_total) + if args.fp16: + try: + from apex import amp + except ImportError: + raise ImportError("Please install apex from https://www.github.com/nvidia/apex to use fp16 training.") + model, optimizer = amp.initialize(model, optimizer, opt_level=args.fp16_opt_level) + + # multi-gpu training (should be after apex fp16 initialization) + if args.n_gpu > 1: + model = torch.nn.DataParallel(model) + + # Distributed training (should be after apex fp16 initialization) + if args.local_rank != -1: + model = torch.nn.parallel.DistributedDataParallel(model, device_ids=[args.local_rank], + output_device=args.local_rank, + find_unused_parameters=True) + + # Train! + logger.info("***** Running training *****") + logger.info(" Num examples = %d", len(train_dataset)) + logger.info(" Num Epochs = %d", args.num_train_epochs) + logger.info(" Instantaneous batch size per GPU = %d", args.per_gpu_train_batch_size) + logger.info(" Total train batch size (w. parallel, distributed & accumulation) = %d", + args.train_batch_size * args.gradient_accumulation_steps * (torch.distributed.get_world_size() if args.local_rank != -1 else 1)) + logger.info(" Gradient Accumulation steps = %d", args.gradient_accumulation_steps) + logger.info(" Total optimization steps = %d", t_total) + + global_step = 0 + tr_loss, logging_loss = 0.0, 0.0 + model.zero_grad() + train_iterator = trange(int(args.num_train_epochs), desc="Epoch", disable=args.local_rank not in [-1, 0]) + set_seed(args) # Added here for reproductibility (even between python 2 and 3) + for _ in train_iterator: + epoch_iterator = tqdm(train_dataloader, desc="Iteration", disable=args.local_rank not in [-1, 0]) + for step, batch in enumerate(epoch_iterator): + model.train() + batch = tuple(t.to(args.device) for t in batch) + inputs = {'input_ids': batch[0], + 'attention_mask': batch[1], + 'token_type_ids': batch[2] if args.model_type in ['bert', 'xlnet'] else None, # XLM don't use segment_ids + 'labels': batch[3]} + outputs = model(**inputs) + loss = outputs[0] # model outputs are always tuple in pytorch-transformers (see doc) + + if args.n_gpu > 1: + loss = loss.mean() # mean() to average on multi-gpu parallel training + if args.gradient_accumulation_steps > 1: + loss = loss / args.gradient_accumulation_steps + + if args.fp16: + with amp.scale_loss(loss, optimizer) as scaled_loss: + scaled_loss.backward() + torch.nn.utils.clip_grad_norm_(amp.master_params(optimizer), args.max_grad_norm) + else: + loss.backward() + torch.nn.utils.clip_grad_norm_(model.parameters(), args.max_grad_norm) + + tr_loss += loss.item() + if (step + 1) % args.gradient_accumulation_steps == 0: + scheduler.step() # Update learning rate schedule + optimizer.step() + model.zero_grad() + global_step += 1 + + if args.local_rank in [-1, 0] and args.logging_steps > 0 and global_step % args.logging_steps == 0: + # Log metrics + if args.local_rank == -1 and args.evaluate_during_training: # Only evaluate when single GPU otherwise metrics may not average well + results = evaluate(args, model, tokenizer) + for key, value in results.items(): + tb_writer.add_scalar('eval_{}'.format(key), value, global_step) + tb_writer.add_scalar('lr', scheduler.get_lr()[0], global_step) + tb_writer.add_scalar('loss', (tr_loss - logging_loss)/args.logging_steps, global_step) + logger.info("Average loss: %s at global step: %s", str((tr_loss - logging_loss)/args.logging_steps), str(global_step)) + logging_loss = tr_loss + + if args.local_rank in [-1, 0] and args.save_steps > 0 and global_step % args.save_steps == 0: + # Save model checkpoint + output_dir = os.path.join(args.output_dir, 'checkpoint-{}'.format(global_step)) + if not os.path.exists(output_dir): + os.makedirs(output_dir) + model_to_save = model.module if hasattr(model, 'module') else model # Take care of distributed/parallel training + model_to_save.save_pretrained(output_dir) + tokenizer.save_vocabulary(output_dir) + torch.save(args, os.path.join(output_dir, 'training_args.bin')) + logger.info("Saving model checkpoint to %s", output_dir) + + if args.max_steps > 0 and global_step > args.max_steps: + epoch_iterator.close() + break + if args.max_steps > 0 and global_step > args.max_steps: + train_iterator.close() + break + + if args.local_rank in [-1, 0]: + tb_writer.close() + + return global_step, tr_loss / global_step + + +def evaluate(args, model, tokenizer, prefix=""): + # Loop to handle MNLI double evaluation (matched, mis-matched) + eval_task_names = (args.task_name,) + eval_outputs_dirs = (args.output_dir,) + + results = {} + for eval_task, eval_output_dir in zip(eval_task_names, eval_outputs_dirs): + eval_dataset = load_and_cache_examples(args, eval_task, tokenizer, evaluate=True) + + if not os.path.exists(eval_output_dir) and args.local_rank in [-1, 0]: + os.makedirs(eval_output_dir) + + args.eval_batch_size = args.per_gpu_eval_batch_size * max(1, args.n_gpu) + # Note that DistributedSampler samples randomly + eval_sampler = SequentialSampler(eval_dataset) if args.local_rank == -1 else DistributedSampler(eval_dataset) + eval_dataloader = DataLoader(eval_dataset, sampler=eval_sampler, batch_size=args.eval_batch_size) + + # Eval! + logger.info("***** Running evaluation {} *****".format(prefix)) + logger.info(" Num examples = %d", len(eval_dataset)) + logger.info(" Batch size = %d", args.eval_batch_size) + eval_loss = 0.0 + nb_eval_steps = 0 + preds = None + out_label_ids = None + for batch in tqdm(eval_dataloader, desc="Evaluating"): + model.eval() + batch = tuple(t.to(args.device) for t in batch) + + with torch.no_grad(): + inputs = {'input_ids': batch[0], + 'attention_mask': batch[1], + 'token_type_ids': batch[2] if args.model_type in ['bert', 'xlnet'] else None, # XLM don't use segment_ids + 'labels': batch[3]} + outputs = model(**inputs) + tmp_eval_loss, logits = outputs[:2] + + eval_loss += tmp_eval_loss.mean().item() + nb_eval_steps += 1 + if preds is None: + preds = logits.detach().cpu().numpy() + out_label_ids = inputs['labels'].detach().cpu().numpy() + else: + preds = np.append(preds, logits.detach().cpu().numpy(), axis=0) + out_label_ids = np.append(out_label_ids, inputs['labels'].detach().cpu().numpy(), axis=0) + + eval_loss = eval_loss / nb_eval_steps + preds = np.argmax(preds, axis=1) + acc = simple_accuracy(preds, out_label_ids) + result = {"eval_acc": acc, "eval_loss": eval_loss} + results.update(result) + + output_eval_file = os.path.join(eval_output_dir, "eval_results.txt") + with open(output_eval_file, "w") as writer: + logger.info("***** Eval results {} *****".format(prefix)) + for key in sorted(result.keys()): + logger.info(" %s = %s", key, str(result[key])) + writer.write("%s = %s\n" % (key, str(result[key]))) + + return results + + +def load_and_cache_examples(args, task, tokenizer, evaluate=False): + if args.local_rank not in [-1, 0]: + torch.distributed.barrier() # Make sure only the first process in distributed training process the dataset, and the others will use the cache + + processor = processors[task]() + # Load data features from cache or dataset file + cached_features_file = os.path.join(args.data_dir, 'cached_{}_{}_{}_{}'.format( + 'dev' if evaluate else 'train', + list(filter(None, args.model_name_or_path.split('/'))).pop(), + str(args.max_seq_length), + str(task))) + if os.path.exists(cached_features_file): + logger.info("Loading features from cached file %s", cached_features_file) + features = torch.load(cached_features_file) + else: + logger.info("Creating features from dataset file at %s", args.data_dir) + label_list = processor.get_labels() + examples = processor.get_dev_examples(args.data_dir) if evaluate else processor.get_train_examples(args.data_dir) + logger.info("Training number: %s", str(len(examples))) + features = convert_examples_to_features(examples, label_list, args.max_seq_length, tokenizer, + cls_token_at_end=bool(args.model_type in ['xlnet']), # xlnet has a cls token at the end + cls_token=tokenizer.cls_token, + sep_token=tokenizer.sep_token, + sep_token_extra=bool(args.model_type in ['roberta']), + cls_token_segment_id=2 if args.model_type in ['xlnet'] else 0, + pad_on_left=bool(args.model_type in ['xlnet']), # pad on the left for xlnet + pad_token_segment_id=4 if args.model_type in ['xlnet'] else 0) + if args.local_rank in [-1, 0]: + logger.info("Saving features into cached file %s", cached_features_file) + torch.save(features, cached_features_file) + + if args.local_rank == 0: + torch.distributed.barrier() # Make sure only the first process in distributed training process the dataset, and the others will use the cache + + # Convert to Tensors and build dataset + all_input_ids = torch.tensor(select_field(features, 'input_ids'), dtype=torch.long) + all_input_mask = torch.tensor(select_field(features, 'input_mask'), dtype=torch.long) + all_segment_ids = torch.tensor(select_field(features, 'segment_ids'), dtype=torch.long) + all_label_ids = torch.tensor([f.label for f in features], dtype=torch.long) + + dataset = TensorDataset(all_input_ids, all_input_mask, all_segment_ids, all_label_ids) + return dataset + + +def main(): + parser = argparse.ArgumentParser() + + ## Required parameters + parser.add_argument("--data_dir", default=None, type=str, required=True, + help="The input data dir. Should contain the .tsv files (or other data files) for the task.") + parser.add_argument("--model_type", default=None, type=str, required=True, + help="Model type selected in the list: " + ", ".join(MODEL_CLASSES.keys())) + parser.add_argument("--model_name_or_path", default=None, type=str, required=True, + help="Path to pre-trained model or shortcut name selected in the list: " + ", ".join(ALL_MODELS)) + parser.add_argument("--task_name", default=None, type=str, required=True, + help="The name of the task to train selected in the list: " + ", ".join(processors.keys())) + parser.add_argument("--output_dir", default=None, type=str, required=True, + help="The output directory where the model predictions and checkpoints will be written.") + + ## Other parameters + parser.add_argument("--config_name", default="", type=str, + help="Pretrained config name or path if not the same as model_name") + parser.add_argument("--tokenizer_name", default="", type=str, + help="Pretrained tokenizer name or path if not the same as model_name") + parser.add_argument("--cache_dir", default="", type=str, + help="Where do you want to store the pre-trained models downloaded from s3") + parser.add_argument("--max_seq_length", default=128, type=int, + help="The maximum total input sequence length after tokenization. Sequences longer " + "than this will be truncated, sequences shorter will be padded.") + parser.add_argument("--do_train", action='store_true', + help="Whether to run training.") + parser.add_argument("--do_eval", action='store_true', + help="Whether to run eval on the dev set.") + parser.add_argument("--evaluate_during_training", action='store_true', + help="Rul evaluation during training at each logging step.") + parser.add_argument("--do_lower_case", action='store_true', + help="Set this flag if you are using an uncased model.") + + parser.add_argument("--per_gpu_train_batch_size", default=8, type=int, + help="Batch size per GPU/CPU for training.") + parser.add_argument("--per_gpu_eval_batch_size", default=8, type=int, + help="Batch size per GPU/CPU for evaluation.") + parser.add_argument('--gradient_accumulation_steps', type=int, default=1, + help="Number of updates steps to accumulate before performing a backward/update pass.") + parser.add_argument("--learning_rate", default=5e-5, type=float, + help="The initial learning rate for Adam.") + parser.add_argument("--weight_decay", default=0.0, type=float, + help="Weight deay if we apply some.") + parser.add_argument("--adam_epsilon", default=1e-8, type=float, + help="Epsilon for Adam optimizer.") + parser.add_argument("--max_grad_norm", default=1.0, type=float, + help="Max gradient norm.") + parser.add_argument("--num_train_epochs", default=3.0, type=float, + help="Total number of training epochs to perform.") + parser.add_argument("--max_steps", default=-1, type=int, + help="If > 0: set total number of training steps to perform. Override num_train_epochs.") + parser.add_argument("--warmup_steps", default=0, type=int, + help="Linear warmup over warmup_steps.") + + parser.add_argument('--logging_steps', type=int, default=50, + help="Log every X updates steps.") + parser.add_argument('--save_steps', type=int, default=50, + help="Save checkpoint every X updates steps.") + parser.add_argument("--eval_all_checkpoints", action='store_true', + help="Evaluate all checkpoints starting with the same prefix as model_name ending and ending with step number") + parser.add_argument("--no_cuda", action='store_true', + help="Avoid using CUDA when available") + parser.add_argument('--overwrite_output_dir', action='store_true', + help="Overwrite the content of the output directory") + parser.add_argument('--overwrite_cache', action='store_true', + help="Overwrite the cached training and evaluation sets") + parser.add_argument('--seed', type=int, default=42, + help="random seed for initialization") + + parser.add_argument('--fp16', action='store_true', + help="Whether to use 16-bit (mixed) precision (through NVIDIA apex) instead of 32-bit") + parser.add_argument('--fp16_opt_level', type=str, default='O1', + help="For fp16: Apex AMP optimization level selected in ['O0', 'O1', 'O2', and 'O3']." + "See details at https://nvidia.github.io/apex/amp.html") + parser.add_argument("--local_rank", type=int, default=-1, + help="For distributed training: local_rank") + parser.add_argument('--server_ip', type=str, default='', help="For distant debugging.") + parser.add_argument('--server_port', type=str, default='', help="For distant debugging.") + args = parser.parse_args() + + if os.path.exists(args.output_dir) and os.listdir(args.output_dir) and args.do_train and not args.overwrite_output_dir: + raise ValueError("Output directory ({}) already exists and is not empty. Use --overwrite_output_dir to overcome.".format(args.output_dir)) + + # Setup distant debugging if needed + if args.server_ip and args.server_port: + # Distant debugging - see https://code.visualstudio.com/docs/python/debugging#_attach-to-a-local-script + import ptvsd + print("Waiting for debugger attach") + ptvsd.enable_attach(address=(args.server_ip, args.server_port), redirect_output=True) + ptvsd.wait_for_attach() + + # Setup CUDA, GPU & distributed training + if args.local_rank == -1 or args.no_cuda: + device = torch.device("cuda" if torch.cuda.is_available() and not args.no_cuda else "cpu") + args.n_gpu = torch.cuda.device_count() + else: # Initializes the distributed backend which will take care of sychronizing nodes/GPUs + torch.cuda.set_device(args.local_rank) + device = torch.device("cuda", args.local_rank) + torch.distributed.init_process_group(backend='nccl') + args.n_gpu = 1 + args.device = device + + # Setup logging + logging.basicConfig(format = '%(asctime)s - %(levelname)s - %(name)s - %(message)s', + datefmt = '%m/%d/%Y %H:%M:%S', + level = logging.INFO if args.local_rank in [-1, 0] else logging.WARN) + logger.warning("Process rank: %s, device: %s, n_gpu: %s, distributed training: %s, 16-bits training: %s", + args.local_rank, device, args.n_gpu, bool(args.local_rank != -1), args.fp16) + + # Set seed + set_seed(args) + + # Prepare GLUE task + args.task_name = args.task_name.lower() + if args.task_name not in processors: + raise ValueError("Task not found: %s" % (args.task_name)) + processor = processors[args.task_name]() + label_list = processor.get_labels() + num_labels = len(label_list) + + # Load pretrained model and tokenizer + if args.local_rank not in [-1, 0]: + torch.distributed.barrier() # Make sure only the first process in distributed training will download model & vocab + + args.model_type = args.model_type.lower() + config_class, model_class, tokenizer_class = MODEL_CLASSES[args.model_type] + config = config_class.from_pretrained(args.config_name if args.config_name else args.model_name_or_path, num_labels=num_labels, finetuning_task=args.task_name) + tokenizer = tokenizer_class.from_pretrained(args.tokenizer_name if args.tokenizer_name else args.model_name_or_path, do_lower_case=args.do_lower_case) + model = model_class.from_pretrained(args.model_name_or_path, from_tf=bool('.ckpt' in args.model_name_or_path), config=config) + + if args.local_rank == 0: + torch.distributed.barrier() # Make sure only the first process in distributed training will download model & vocab + + model.to(args.device) + + logger.info("Training/evaluation parameters %s", args) + + + # Training + if args.do_train: + train_dataset = load_and_cache_examples(args, args.task_name, tokenizer, evaluate=False) + global_step, tr_loss = train(args, train_dataset, model, tokenizer) + logger.info(" global_step = %s, average loss = %s", global_step, tr_loss) + + + # Saving best-practices: if you use defaults names for the model, you can reload it using from_pretrained() + if args.do_train and (args.local_rank == -1 or torch.distributed.get_rank() == 0): + # Create output directory if needed + if not os.path.exists(args.output_dir) and args.local_rank in [-1, 0]: + os.makedirs(args.output_dir) + + logger.info("Saving model checkpoint to %s", args.output_dir) + # Save a trained model, configuration and tokenizer using `save_pretrained()`. + # They can then be reloaded using `from_pretrained()` + model_to_save = model.module if hasattr(model, 'module') else model # Take care of distributed/parallel training + model_to_save.save_pretrained(args.output_dir) + tokenizer.save_pretrained(args.output_dir) + + # Good practice: save your training arguments together with the trained model + torch.save(args, os.path.join(args.output_dir, 'training_args.bin')) + + # Load a trained model and vocabulary that you have fine-tuned + model = model_class.from_pretrained(args.output_dir) + tokenizer = tokenizer_class.from_pretrained(args.output_dir) + model.to(args.device) + + + # Evaluation + results = {} + if args.do_eval and args.local_rank in [-1, 0]: + if not args.do_train: + args.output_dir = args.model_name_or_path + checkpoints = [args.output_dir] + if args.eval_all_checkpoints: + checkpoints = list(os.path.dirname(c) for c in sorted(glob.glob(args.output_dir + '/**/' + WEIGHTS_NAME, recursive=True))) + logging.getLogger("pytorch_transformers.modeling_utils").setLevel(logging.WARN) # Reduce logging + logger.info("Evaluate the following checkpoints: %s", checkpoints) + for checkpoint in checkpoints: + global_step = checkpoint.split('-')[-1] if len(checkpoints) > 1 else "" + model = model_class.from_pretrained(checkpoint) + model.to(args.device) + result = evaluate(args, model, tokenizer, prefix=global_step) + result = dict((k + '_{}'.format(global_step), v) for k, v in result.items()) + results.update(result) + + return results + + +if __name__ == "__main__": + main() diff --git a/examples/single_model_scripts/utils_multiple_choice.py b/examples/single_model_scripts/utils_multiple_choice.py new file mode 100644 index 0000000000..6ecb8e0f55 --- /dev/null +++ b/examples/single_model_scripts/utils_multiple_choice.py @@ -0,0 +1,421 @@ +# 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. +""" BERT classification fine-tuning: utilities to work with GLUE tasks """ + +from __future__ import absolute_import, division, print_function + + +import logging +import os +import sys +from io import open +import json +import csv +import glob +import tqdm + + +logger = logging.getLogger(__name__) + + +class InputExample(object): + """A single training/test example for multiple choice""" + + def __init__(self, example_id, question, contexts, endings, label=None): + """Constructs a InputExample. + + Args: + guid: Unique id for the example. + text_a: string. The untokenized text of the first sequence. For single + sequence tasks, only this sequence must be specified. + text_b: (Optional) string. The untokenized text of the second sequence. + Only must be specified for sequence pair tasks. + label: (Optional) string. The label of the example. This should be + specified for train and dev examples, but not for test examples. + """ + self.example_id = example_id + self.question = question + self.contexts = contexts + self.endings = endings + self.label = label + + +class InputFeatures(object): + def __init__(self, + example_id, + choices_features, + label + + ): + self.example_id = example_id + self.choices_features = [ + { + 'input_ids': input_ids, + 'input_mask': input_mask, + 'segment_ids': segment_ids + } + for _, input_ids, input_mask, segment_ids in choices_features + ] + self.label = label + + +class DataProcessor(object): + """Base class for data converters for sequence classification data sets.""" + + def get_train_examples(self, data_dir): + """Gets a collection of `InputExample`s for the train set.""" + raise NotImplementedError() + + def get_dev_examples(self, data_dir): + """Gets a collection of `InputExample`s for the dev set.""" + raise NotImplementedError() + + def get_labels(self): + """Gets the list of labels for this data set.""" + raise NotImplementedError() + + +class RaceProcessor(DataProcessor): + """Processor for the MRPC data set (GLUE version).""" + + def get_train_examples(self, data_dir): + """See base class.""" + logger.info("LOOKING AT {} train".format(data_dir)) + high = os.path.join(data_dir, 'train/high') + middle = os.path.join(data_dir, 'train/middle') + high = self._read_txt(high) + middle = self._read_txt(middle) + return self._create_examples(high + middle, 'train') + + def get_dev_examples(self, data_dir): + """See base class.""" + logger.info("LOOKING AT {} dev".format(data_dir)) + high = os.path.join(data_dir, 'dev/high') + middle = os.path.join(data_dir, 'dev/middle') + high = self._read_txt(high) + middle = self._read_txt(middle) + return self._create_examples(high + middle, 'dev') + + def get_labels(self): + """See base class.""" + return ["0", "1", "2", "3"] + + def _read_txt(self, input_dir): + lines = [] + files = glob.glob(input_dir + "/*txt") + for file in tqdm.tqdm(files, desc="read files"): + with open(file, 'r', encoding='utf-8') as fin: + data_raw = json.load(fin) + data_raw["race_id"] = file + lines.append(data_raw) + return lines + + + def _create_examples(self, lines, set_type): + """Creates examples for the training and dev sets.""" + examples = [] + for (_, data_raw) in enumerate(lines): + race_id = "%s-%s" % (set_type, data_raw["race_id"]) + article = data_raw["article"] + for i in range(len(data_raw["answers"])): + truth = str(ord(data_raw['answers'][i]) - ord('A')) + question = data_raw['questions'][i] + options = data_raw['options'][i] + + examples.append( + InputExample( + example_id=race_id, + question=question, + contexts=[article, article, article, article], + endings=[options[0], options[1], options[2], options[3]], + label=truth)) + return examples + +class SwagProcessor(DataProcessor): + """Processor for the MRPC data set (GLUE version).""" + + def get_train_examples(self, data_dir): + """See base class.""" + logger.info("LOOKING AT {} train".format(data_dir)) + return self._create_examples(self._read_csv(os.path.join(data_dir, "train.csv")), "train") + + def get_dev_examples(self, data_dir): + """See base class.""" + logger.info("LOOKING AT {} dev".format(data_dir)) + return self._create_examples(self._read_csv(os.path.join(data_dir, "val.csv")), "dev") + + def get_labels(self): + """See base class.""" + return ["0", "1", "2", "3"] + + def _read_csv(self, input_file): + with open(input_file, 'r', encoding='utf-8') as f: + reader = csv.reader(f) + lines = [] + for line in reader: + if sys.version_info[0] == 2: + line = list(unicode(cell, 'utf-8') for cell in line) + lines.append(line) + return lines + + + def _create_examples(self, lines, type): + """Creates examples for the training and dev sets.""" + if type == "train" and lines[0][-1] != 'label': + raise ValueError( + "For training, the input file must contain a label column." + ) + + examples = [ + InputExample( + example_id=line[2], + question=line[5], # in the swag dataset, the + # common beginning of each + # choice is stored in "sent2". + contexts = [line[4], line[4], line[4], line[4]], + endings = [line[7], line[8], line[9], line[10]], + label=line[11] + ) for line in lines[1:] # we skip the line with the column names + ] + + return examples + + +class ArcProcessor(DataProcessor): + """Processor for the MRPC data set (GLUE version).""" + + def get_train_examples(self, data_dir): + """See base class.""" + logger.info("LOOKING AT {} train".format(data_dir)) + return self._create_examples(self._read_json(os.path.join(data_dir, "train.jsonl")), "train") + + def get_dev_examples(self, data_dir): + """See base class.""" + logger.info("LOOKING AT {} dev".format(data_dir)) + return self._create_examples(self._read_json(os.path.join(data_dir, "dev.jsonl")), "dev") + + def get_labels(self): + """See base class.""" + return ["0", "1", "2", "3"] + + def _read_json(self, input_file): + with open(input_file, 'r', encoding='utf-8') as fin: + lines = fin.readlines() + return lines + + + def _create_examples(self, lines, type): + """Creates examples for the training and dev sets.""" + + def normalize(truth): + if truth in "ABCD": + return ord(truth) - ord("A") + elif truth in "1234": + return int(truth) - 1 + else: + logger.info("truth ERROR!") + examples = [] + three_choice = 0 + four_choice = 0 + five_choice = 0 + other_choices = 0 + for line in tqdm.tqdm(lines, desc="read arc data"): + data_raw = json.loads(line.strip("\n")) + if len(data_raw["question"]["choices"]) == 3: + three_choice += 1 + continue + elif len(data_raw["question"]["choices"]) == 5: + five_choice += 1 + continue + elif len(data_raw["question"]["choices"]) != 4: + other_choices += 1 + continue + four_choice += 1 + truth = str(normalize(data_raw["answerKey"])) + question_choices = data_raw["question"] + question = question_choices["stem"] + id = data_raw["id"] + options = question_choices["choices"] + + if len(options) == 4: + examples.append( + InputExample( + example_id = id, + question=question, + contexts=[options[0]["para"].replace("_", ""), options[1]["para"].replace("_", ""), + options[2]["para"].replace("_", ""), options[3]["para"].replace("_", "")], + endings=[options[0]["text"], options[1]["text"], options[2]["text"], options[3]["text"]], + label=truth)) + + if type == "train": + assert len(examples) > 1 + assert examples[0].label is not None + logger.info("len examples: %s}", str(len(examples))) + logger.info("Three choices: %s", str(three_choice)) + logger.info("Five choices: %s", str(five_choice)) + logger.info("Other choices: %s", str(other_choices)) + logger.info("four choices: %s", str(four_choice)) + + return examples + + +def convert_examples_to_features(examples, label_list, max_seq_length, + tokenizer, + cls_token_at_end=False, + cls_token='[CLS]', + cls_token_segment_id=1, + sep_token='[SEP]', + sequence_a_segment_id=0, + sequence_b_segment_id=1, + sep_token_extra=False, + pad_token_segment_id=0, + pad_on_left=False, + pad_token=0, + mask_padding_with_zero=True): + """ Loads a data file into a list of `InputBatch`s + `cls_token_at_end` define the location of the CLS token: + - False (Default, BERT/XLM pattern): [CLS] + A + [SEP] + B + [SEP] + - True (XLNet/GPT pattern): A + [SEP] + B + [SEP] + [CLS] + `cls_token_segment_id` define the segment id associated to the CLS token (0 for BERT, 2 for XLNet) + """ + + label_map = {label : i for i, label in enumerate(label_list)} + + features = [] + for (ex_index, example) in tqdm.tqdm(enumerate(examples), desc="convert examples to features"): + if ex_index % 10000 == 0: + logger.info("Writing example %d of %d" % (ex_index, len(examples))) + choices_features = [] + for ending_idx, (context, ending) in enumerate(zip(example.contexts, example.endings)): + tokens_a = tokenizer.tokenize(context) + tokens_b = None + if example.question.find("_") != -1: + tokens_b = tokenizer.tokenize(example.question.replace("_", ending)) + else: + tokens_b = tokenizer.tokenize(example.question + " " + ending) + special_tokens_count = 4 if sep_token_extra else 3 + _truncate_seq_pair(tokens_a, tokens_b, max_seq_length - special_tokens_count) + + # The convention in BERT is: + # (a) For sequence pairs: + # tokens: [CLS] is this jack ##son ##ville ? [SEP] no it is not . [SEP] + # type_ids: 0 0 0 0 0 0 0 0 1 1 1 1 1 1 + # (b) For single sequences: + # tokens: [CLS] the dog is hairy . [SEP] + # type_ids: 0 0 0 0 0 0 0 + # + # Where "type_ids" are used to indicate whether this is the first + # sequence or the second sequence. The embedding vectors for `type=0` and + # `type=1` were learned during pre-training and are added to the wordpiece + # embedding vector (and position vector). This is not *strictly* necessary + # since the [SEP] token unambiguously separates the sequences, but it makes + # it easier for the model to learn the concept of sequences. + # + # For classification tasks, the first vector (corresponding to [CLS]) is + # used as as the "sentence vector". Note that this only makes sense because + # the entire model is fine-tuned. + tokens = tokens_a + [sep_token] + if sep_token_extra: + # roberta uses an extra separator b/w pairs of sentences + tokens += [sep_token] + + segment_ids = [sequence_a_segment_id] * len(tokens) + + if tokens_b: + tokens += tokens_b + [sep_token] + segment_ids += [sequence_b_segment_id] * (len(tokens_b) + 1) + + if cls_token_at_end: + tokens = tokens + [cls_token] + segment_ids = segment_ids + [cls_token_segment_id] + else: + tokens = [cls_token] + tokens + segment_ids = [cls_token_segment_id] + segment_ids + + input_ids = tokenizer.convert_tokens_to_ids(tokens) + + # The mask has 1 for real tokens and 0 for padding tokens. Only real + # tokens are attended to. + input_mask = [1 if mask_padding_with_zero else 0] * len(input_ids) + + # Zero-pad up to the sequence length. + padding_length = max_seq_length - len(input_ids) + if pad_on_left: + input_ids = ([pad_token] * padding_length) + input_ids + input_mask = ([0 if mask_padding_with_zero else 1] * padding_length) + input_mask + segment_ids = ([pad_token_segment_id] * padding_length) + segment_ids + else: + input_ids = input_ids + ([pad_token] * padding_length) + input_mask = input_mask + ([0 if mask_padding_with_zero else 1] * padding_length) + segment_ids = segment_ids + ([pad_token_segment_id] * padding_length) + + assert len(input_ids) == max_seq_length + assert len(input_mask) == max_seq_length + assert len(segment_ids) == max_seq_length + choices_features.append((tokens, input_ids, input_mask, segment_ids)) + label = label_map[example.label] + + if ex_index < 2: + logger.info("*** Example ***") + logger.info("race_id: {}".format(example.example_id)) + for choice_idx, (tokens, input_ids, input_mask, segment_ids) in enumerate(choices_features): + logger.info("choice: {}".format(choice_idx)) + logger.info("tokens: {}".format(' '.join(tokens))) + logger.info("input_ids: {}".format(' '.join(map(str, input_ids)))) + logger.info("input_mask: {}".format(' '.join(map(str, input_mask)))) + logger.info("segment_ids: {}".format(' '.join(map(str, segment_ids)))) + logger.info("label: {}".format(label)) + + features.append( + InputFeatures( + example_id = example.example_id, + choices_features = choices_features, + label = label + ) + ) + + return features + + +def _truncate_seq_pair(tokens_a, tokens_b, max_length): + """Truncates a sequence pair in place to the maximum length.""" + + # This is a simple heuristic which will always truncate the longer sequence + # one token at a time. This makes more sense than truncating an equal percent + # of tokens from each, since if one sequence is very short then each token + # that's truncated likely contains more information than a longer sequence. + while True: + total_length = len(tokens_a) + len(tokens_b) + if total_length <= max_length: + break + if len(tokens_a) > len(tokens_b): + tokens_a.pop() + else: + tokens_b.pop() + + +processors = { + "race": RaceProcessor, + "swag": SwagProcessor, + "arc": ArcProcessor +} + + +GLUE_TASKS_NUM_LABELS = { + "race", 4, + "swag", 4, + "arc", 4 +} diff --git a/pytorch_transformers/__init__.py b/pytorch_transformers/__init__.py index 62e3b8c47b..a19f13a3fb 100644 --- a/pytorch_transformers/__init__.py +++ b/pytorch_transformers/__init__.py @@ -31,7 +31,7 @@ from .modeling_gpt2 import (GPT2Config, GPT2PreTrainedModel, GPT2Model, GPT2_PRETRAINED_MODEL_ARCHIVE_MAP) from .modeling_xlnet import (XLNetConfig, XLNetPreTrainedModel, XLNetModel, XLNetLMHeadModel, - XLNetForSequenceClassification, XLNetForQuestionAnswering, + XLNetForSequenceClassification, XLNetForQuestionAnswering, XLNetForMultipleChoice, load_tf_weights_in_xlnet, XLNET_PRETRAINED_CONFIG_ARCHIVE_MAP, XLNET_PRETRAINED_MODEL_ARCHIVE_MAP) from .modeling_xlm import (XLMConfig, XLMPreTrainedModel , XLMModel, @@ -39,6 +39,7 @@ from .modeling_xlm import (XLMConfig, XLMPreTrainedModel , XLMModel, XLMForQuestionAnswering, XLM_PRETRAINED_CONFIG_ARCHIVE_MAP, XLM_PRETRAINED_MODEL_ARCHIVE_MAP) from .modeling_roberta import (RobertaConfig, RobertaForMaskedLM, RobertaModel, RobertaForSequenceClassification, + RobertaForMultipleChoice, ROBERTA_PRETRAINED_CONFIG_ARCHIVE_MAP, ROBERTA_PRETRAINED_MODEL_ARCHIVE_MAP) from .modeling_utils import (WEIGHTS_NAME, CONFIG_NAME, TF_WEIGHTS_NAME, PretrainedConfig, PreTrainedModel, prune_layer, Conv1D) diff --git a/pytorch_transformers/modeling_roberta.py b/pytorch_transformers/modeling_roberta.py index adb04b4b3a..7c75f2927e 100644 --- a/pytorch_transformers/modeling_roberta.py +++ b/pytorch_transformers/modeling_roberta.py @@ -329,6 +329,46 @@ class RobertaForSequenceClassification(BertPreTrainedModel): return outputs # (loss), logits, (hidden_states), (attentions) +class RobertaForMultipleChoice(BertPreTrainedModel): + config_class = RobertaConfig + pretrained_model_archive_map = ROBERTA_PRETRAINED_MODEL_ARCHIVE_MAP + base_model_prefix = "roberta" + + def __init__(self, config): + super(RobertaForMultipleChoice, self).__init__(config) + + self.roberta = RobertaModel(config) + self.dropout = nn.Dropout(config.hidden_dropout_prob) + self.classifier = nn.Linear(config.hidden_size, 1) + + self.apply(self.init_weights) + + def forward(self, input_ids, token_type_ids=None, attention_mask=None, labels=None, + position_ids=None, head_mask=None): + num_choices = input_ids.shape[1] + + flat_input_ids = input_ids.view(-1, input_ids.size(-1)) + flat_position_ids = position_ids.view(-1, position_ids.size(-1)) if position_ids is not None else None + flat_token_type_ids = token_type_ids.view(-1, token_type_ids.size(-1)) if token_type_ids is not None else None + flat_attention_mask = attention_mask.view(-1, attention_mask.size(-1)) if attention_mask is not None else None + outputs = self.roberta(flat_input_ids, position_ids=flat_position_ids, token_type_ids=flat_token_type_ids, + attention_mask=flat_attention_mask, head_mask=head_mask) + pooled_output = outputs[1] + + pooled_output = self.dropout(pooled_output) + logits = self.classifier(pooled_output) + reshaped_logits = logits.view(-1, num_choices) + + outputs = (reshaped_logits,) + outputs[2:] # add hidden states and attention if they are here + + if labels is not None: + loss_fct = CrossEntropyLoss() + loss = loss_fct(reshaped_logits, labels) + outputs = (loss,) + outputs + + return outputs # (loss), reshaped_logits, (hidden_states), (attentions) + + class RobertaClassificationHead(nn.Module): """Head for sentence-level classification tasks.""" diff --git a/pytorch_transformers/modeling_xlnet.py b/pytorch_transformers/modeling_xlnet.py index e9e75e3ab7..cba45f34a5 100644 --- a/pytorch_transformers/modeling_xlnet.py +++ b/pytorch_transformers/modeling_xlnet.py @@ -1143,6 +1143,50 @@ class XLNetForSequenceClassification(XLNetPreTrainedModel): return outputs # return (loss), logits, mems, (hidden states), (attentions) +class XLNetForMultipleChoice(XLNetPreTrainedModel): + r""" + + """ + def __init__(self, config): + super(XLNetForMultipleChoice, self).__init__(config) + + self.transformer = XLNetModel(config) + self.sequence_summary = SequenceSummary(config) + self.logits_proj = nn.Linear(config.d_model, 1) + + self.apply(self.init_weights) + + def forward(self, input_ids, token_type_ids=None, input_mask=None, attention_mask=None, + mems=None, perm_mask=None, target_mapping=None, + labels=None, head_mask=None): + num_choices = input_ids.shape[1] + + flat_input_ids = input_ids.view(-1, input_ids.size(-1)) + flat_token_type_ids = token_type_ids.view(-1, token_type_ids.size(-1)) if token_type_ids is not None else None + flat_attention_mask = attention_mask.view(-1, attention_mask.size(-1)) if attention_mask is not None else None + flat_input_mask = input_mask.view(-1, input_mask.size(-1) if input_mask is not None else None) + + transformer_outputs = self.transformer(flat_input_ids, token_type_ids=flat_token_type_ids, + input_mask=flat_input_mask, attention_mask=flat_attention_mask, + mems=mems, perm_mask=perm_mask, target_mapping=target_mapping, + head_mask=head_mask) + + + output = transformer_outputs[0] + + output = self.sequence_summary(output) + logits = self.logits_proj(output) + reshaped_logits = logits.view(-1, num_choices) + outputs = (reshaped_logits,) + transformer_outputs[1:] # Keep mems, hidden states, attentions if there are in it + + if labels is not None: + loss_fct = CrossEntropyLoss() + loss = loss_fct(reshaped_logits, labels.view(-1)) + outputs = (loss,) + outputs + + return outputs # return (loss), logits, mems, (hidden states), (attentions) + + @add_start_docstrings("""XLNet Model with a span classification head on top for extractive question-answering tasks like SQuAD (a linear layers on top of the hidden-states output to compute `span start logits` and `span end logits`). """, XLNET_START_DOCSTRING, XLNET_INPUTS_DOCSTRING)