github_finetune_gpt2_title.py

"""
Fine-tuning the library models for sequence to sequence.
"""

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

import datasets
import nltk  # Here to have a nice missing dependency error message early on
import numpy as np
from datasets import load_dataset, load_metric

import transformers

from filelock import FileLock

from transformers import GPT2Tokenizer, AutoModelForCausalLM

from transformers import GPT2LMHeadModel
from transformers import Trainer, TrainingArguments
from transformers.modeling_outputs import CausalLMOutputWithCrossAttentions

from transformers.file_utils import is_offline_mode
from transformers.trainer_utils import get_last_checkpoint
from transformers.utils import check_min_version
from transformers.utils.versions import require_version
from transformers import HfArgumentParser, Seq2SeqTrainingArguments, set_seed, AutoConfig, AutoTokenizer
from transformers import DataCollatorWithPadding

from typing import Any, Dict, List, Optional, Tuple, Union

import torch
from torch import nn
from torch.utils.data import Dataset

from transformers.deepspeed import is_deepspeed_zero3_enabled
from transformers.trainer import Trainer
from transformers.trainer_utils import PredictionOutput
import jsonlines
# from metric.cal_rouge import compute_rouges
# from metric.cal_bleu import compute_bleus
from metric.evaluation import compute_bleu

logger = logging.getLogger(__name__)


class GPTTrainer(Trainer):
    def evaluate(
            self,
            eval_dataset: Optional[Dataset] = None,
            ignore_keys: Optional[List[str]] = None,
            metric_key_prefix: str = "eval",
            max_length: Optional[int] = None,
            num_beams: Optional[int] = None,
    ) -> Dict[str, float]:

        self._max_length = max_length if max_length is not None else self.args.generation_max_length
        self._num_beams = num_beams if num_beams is not None else self.args.generation_num_beams
        return super().evaluate(eval_dataset, ignore_keys=ignore_keys, metric_key_prefix=metric_key_prefix)

    def predict(
            self,
            test_dataset: Dataset,
            ignore_keys: Optional[List[str]] = None,
            metric_key_prefix: str = "test",
            max_length: Optional[int] = None,
            num_beams: Optional[int] = None,
    ) -> PredictionOutput:

        self._max_length = max_length if max_length is not None else self.args.generation_max_length
        self._num_beams = num_beams if num_beams is not None else self.args.generation_num_beams
        return super().predict(test_dataset, ignore_keys=ignore_keys, metric_key_prefix=metric_key_prefix)

    '''
    def compute_loss(self, model, inputs):

        outputs = model(input_ids=inputs['input_ids'],
                    labels=inputs['input_ids'],
                    attention_mask=inputs['attention_mask'])


        # Save past state if it exists
        # TODO: this needs to be fixed and made cleaner later.

        if self.args.past_index >= 0:
            self._past = outputs[self.args.past_index]

        # We don't use .loss here since the model may return tuples instead of ModelOutput.

        return outputs["loss"] if isinstance(outputs, dict) else outputs[0]

    '''

    def prediction_step(
            self,
            model: nn.Module,
            inputs: Dict[str, Union[torch.Tensor, Any]],
            prediction_loss_only: bool,
            ignore_keys: Optional[List[str]] = None,
    ) -> Tuple[Optional[float], Optional[torch.Tensor], Optional[torch.Tensor]]:

        if not self.args.predict_with_generate or prediction_loss_only:
            return super().prediction_step(
                model, inputs, prediction_loss_only=prediction_loss_only, ignore_keys=ignore_keys
            )

        # has_labels = all(inputs.get(k) is not None for k in self.label_names)

        has_labels = "labels" in inputs
        inputs = self._prepare_inputs(inputs)

        # XXX: adapt synced_gpus for fairscale as well
        gen_kwargs = {
            "max_length": self._max_length if self._max_length is not None else self.model.config.max_length,
            "num_beams": self._num_beams if self._num_beams is not None else self.model.config.num_beams,
            "synced_gpus": True if is_deepspeed_zero3_enabled() else False,
        }
        generated_tokens = self.model.generate(
            inputs["input_ids"],
            attention_mask=inputs.get("attention_mask", None),
            pad_token_id=self.tokenizer.eos_token_id,
            **gen_kwargs,
        )
        if len(generated_tokens) == 1:
            generated_tokens = generated_tokens[0]

        if generated_tokens.shape[-1] <= gen_kwargs["max_length"]:
            generated_tokens = self._pad_tensors_to_max_len(generated_tokens, gen_kwargs["max_length"])

        '''
        with torch.no_grad():
            with self.autocast_smart_context_manager():
                outputs = model(input_ids=inputs['input_ids'],
                          labels=inputs['input_ids'])
            if has_labels:
                if self.label_smoother is not None:
                    loss = self.label_smoother(outputs, inputs["input_ids"]).mean().detach()
                else:
                    loss = (outputs["loss"] if isinstance(outputs, dict) else outputs[0]).mean().detach()
            else:
                loss = None
        '''

        with torch.no_grad():
            with self.autocast_smart_context_manager():
                outputs = model(**inputs)
            if has_labels:
                if self.label_smoother is not None:
                    loss = self.label_smoother(outputs, inputs["labels"]).mean().detach()
                else:
                    loss = (outputs["loss"] if isinstance(outputs, dict) else outputs[0]).mean().detach()
            else:
                loss = None

        if self.args.prediction_loss_only:
            return (loss, None, None)

        if has_labels:
            labels = inputs["labels"]
        else:
            labels = None

        return (loss, generated_tokens, labels)

    def _pad_tensors_to_max_len(self, tensor, max_length):
        if self.tokenizer is not None and hasattr(self.tokenizer, "pad_token_id"):
            # If PAD token is not defined at least EOS token has to be defined
            pad_token_id = (
                self.tokenizer.pad_token_id if self.tokenizer.pad_token_id is not None else self.tokenizer.eos_token_id
            )
        else:
            if self.model.config.pad_token_id is not None:
                pad_token_id = self.model.config.pad_token_id
            else:
                raise ValueError("Pad_token_id must be set in the configuration of the model, in order to pad tensors")

        padded_tensor = pad_token_id * torch.ones(
            (tensor.shape[0], max_length), dtype=tensor.dtype, device=tensor.device
        )
        padded_tensor[:, : tensor.shape[-1]] = tensor
        return padded_tensor


@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 to store the pretrained models downloaded from huggingface.co"},
    )
    use_fast_tokenizer: bool = field(
        default=True,
        metadata={"help": "Whether to use one of the fast tokenizer (backed by the tokenizers library) or not."},
    )
    model_revision: str = field(
        default="main",
        metadata={"help": "The specific model version to use (can be a branch name, tag name or commit id)."},
    )
    use_auth_token: bool = field(
        default=False,
        metadata={
            "help": "Will use the token generated when running `transformers-cli login` (necessary to use this script "
                    "with private models)."
        },
    )
    resize_position_embeddings: Optional[bool] = field(
        default=None,
        metadata={
            "help": "Whether to automatically resize the position embeddings if `max_source_length` exceeds "
                    "the model's position embeddings."
        },
    )
    model_name: str = field(
        default="t5-pegasus",
        metadata={"help": "model name"},
    )


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

    lang: str = field(default=None, metadata={"help": "Language id for summarization."})

    dataset_name: Optional[str] = field(
        default=None, metadata={"help": "The name of the dataset to use (via the datasets library)."}
    )
    dataset_config_name: Optional[str] = field(
        default=None, metadata={"help": "The configuration name of the dataset to use (via the datasets library)."}
    )
    text_column: Optional[str] = field(
        default=None,
        metadata={"help": "The name of the column in the datasets containing the full texts (for summarization)."},
    )
    summary_column: Optional[str] = field(
        default=None,
        metadata={"help": "The name of the column in the datasets containing the summaries (for summarization)."},
    )
    train_file: Optional[str] = field(
        default=None, metadata={"help": "The input training data file (a jsonlines or csv file)."}
    )
    validation_file: Optional[str] = field(
        default=None,
        metadata={
            "help": "An optional input evaluation data file to evaluate the metrics (rouge) on "
                    "(a jsonlines or csv file)."
        },
    )
    test_file: Optional[str] = field(
        default=None,
        metadata={
            "help": "An optional input test data file to evaluate the metrics (rouge) on " "(a jsonlines or csv file)."
        },
    )
    overwrite_cache: bool = field(
        default=False, metadata={"help": "Overwrite the cached training and evaluation sets"}
    )
    preprocessing_num_workers: Optional[int] = field(
        default=None,
        metadata={"help": "The number of processes to use for the preprocessing."},
    )
    max_source_length: Optional[int] = field(
        default=512,
        metadata={
            "help": "The maximum total input sequence length after tokenization. Sequences longer "
                    "than this will be truncated, sequences shorter will be padded."
        },
    )
    max_target_length: Optional[int] = field(
        default=128,
        metadata={
            "help": "The maximum total sequence length for target text after tokenization. Sequences longer "
                    "than this will be truncated, sequences shorter will be padded."
        },
    )
    val_max_target_length: Optional[int] = field(
        default=None,
        metadata={
            "help": "The maximum total sequence length for validation target text after tokenization. Sequences longer "
                    "than this will be truncated, sequences shorter will be padded. Will default to `max_target_length`."
                    "This argument is also used to override the ``max_length`` param of ``model.generate``, which is used "
                    "during ``evaluate`` and ``predict``."
        },
    )
    pad_to_max_length: bool = field(
        default=False,
        metadata={
            "help": "Whether to pad all samples to model maximum sentence length. "
                    "If False, will pad the samples dynamically when batching to the maximum length in the batch. More "
                    "efficient on GPU but very bad for TPU."
        },
    )
    max_train_samples: Optional[int] = field(
        default=None,
        metadata={
            "help": "For debugging purposes or quicker training, truncate the number of training examples to this "
                    "value if set."
        },
    )
    max_eval_samples: Optional[int] = field(
        default=None,
        metadata={
            "help": "For debugging purposes or quicker training, truncate the number of evaluation examples to this "
                    "value if set."
        },
    )
    max_predict_samples: Optional[int] = field(
        default=None,
        metadata={
            "help": "For debugging purposes or quicker training, truncate the number of prediction examples to this "
                    "value if set."
        },
    )
    num_beams: Optional[int] = field(
        default=None,
        metadata={
            "help": "Number of beams to use for evaluation. This argument will be passed to ``model.generate``, "
                    "which is used during ``evaluate`` and ``predict``."
        },
    )
    ignore_pad_token_for_loss: bool = field(
        default=True,
        metadata={
            "help": "Whether to ignore the tokens corresponding to padded labels in the loss computation or not."
        },
    )
    source_prefix: Optional[str] = field(
        default="", metadata={"help": "A prefix to add before every source text (useful for T5 models)."}
    )

    forced_bos_token: Optional[str] = field(
        default=None,
        metadata={
            "help": "The token to force as the first generated token after the decoder_start_token_id."
                    "Useful for multilingual models like mBART where the first generated token"
                    "needs to be the target language token (Usually it is the target language token)"
        },
    )

    def __post_init__(self):
        if self.dataset_name is None and self.train_file is None and self.validation_file is None:
            raise ValueError("Need either a dataset name or a training/validation file.")
        else:
            if self.train_file is not None:
                extension = self.train_file.split(".")[-1]
                assert extension in ["csv", "json"], "`train_file` should be a csv or a json file."
            if self.validation_file is not None:
                extension = self.validation_file.split(".")[-1]
                assert extension in ["csv", "json"], "`validation_file` should be a csv or a json file."
        if self.val_max_target_length is None:
            self.val_max_target_length = self.max_target_length


summarization_name_mapping = {
    "amazon_reviews_multi": ("review_body", "review_title"),
    "big_patent": ("description", "abstract"),
    "cnn_dailymail": ("article", "highlights"),
    "orange_sum": ("text", "summary"),
    "pn_summary": ("article", "summary"),
    "psc": ("extract_text", "summary_text"),
    "samsum": ("dialogue", "summary"),
    "thaisum": ("body", "summary"),
    "xglue": ("news_body", "news_title"),
    "xsum": ("document", "summary"),
    "wiki_summary": ("article", "highlights"),
}


def main():
    os.environ["WANDB_DISABLED"] = "true"
    # 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, Seq2SeqTrainingArguments))
    if len(sys.argv) == 2 and sys.argv[1].endswith(".json"):
        # If we pass only one argument to the script and it's the path to a json file,
        # let's parse it to get our arguments.
        model_args, data_args, training_args = parser.parse_json_file(json_file=os.path.abspath(sys.argv[1]))
    else:
        model_args, data_args, training_args = parser.parse_args_into_dataclasses()

    # Setup logging
    logging.basicConfig(
        format="%(asctime)s - %(levelname)s - %(name)s - %(message)s",
        datefmt="%m/%d/%Y %H:%M:%S",
        handlers=[logging.StreamHandler(sys.stdout)],
    )
    log_level = training_args.get_process_log_level()
    logger.setLevel(log_level)
    datasets.utils.logging.set_verbosity(log_level)
    transformers.utils.logging.set_verbosity(log_level)
    transformers.utils.logging.enable_default_handler()
    transformers.utils.logging.enable_explicit_format()

    # Log on each process the small summary:
    logger.warning(
        f"Process rank: {training_args.local_rank}, device: {training_args.device}, n_gpu: {training_args.n_gpu}"
        + f"distributed training: {bool(training_args.local_rank != -1)}, 16-bits training: {training_args.fp16}"
    )
    logger.info(f"Training/evaluation parameters {training_args}")

    if data_args.source_prefix is None and model_args.model_name_or_path in [
        "t5-small",
        "t5-base",
        "t5-large",
        "t5-3b",
        "t5-11b",
    ]:
        logger.warning(
            "You're running a t5 model but didn't provide a source prefix, which is the expected, e.g. with "
            "`--source_prefix 'summarize: ' `"
        )

    # Detecting last checkpoint.
    last_checkpoint = None
    if not os.path.exists(training_args.output_dir):
        os.makedirs(training_args.output_dir)
    if os.path.isdir(training_args.output_dir) and training_args.do_train and not training_args.overwrite_output_dir:
        last_checkpoint = get_last_checkpoint(training_args.output_dir)
        if last_checkpoint is None and len(os.listdir(training_args.output_dir)) > 0:
            raise ValueError(
                f"Output directory ({training_args.output_dir}) already exists and is not empty. "
                "Use --overwrite_output_dir to overcome."
            )
        elif last_checkpoint is not None and training_args.resume_from_checkpoint is None:
            logger.info(
                f"Checkpoint detected, resuming training at {last_checkpoint}. To avoid this behavior, change "
                "the `--output_dir` or add `--overwrite_output_dir` to train from scratch."
            )

    # Set seed before initializing model.
    set_seed(training_args.seed)

    # Get the datasets: you can either provide your own CSV/JSON training and evaluation files (see below)
    # or just provide the name of one of the public datasets available on the hub at https://huggingface.co/datasets/
    # (the dataset will be downloaded automatically from the datasets Hub).
    #
    # For CSV/JSON files this script will use the first column for the full texts and the second column for the
    # summaries (unless you specify column names for this with the `text_column` and `summary_column` arguments).
    #
    # In distributed training, the load_dataset function guarantee that only one local process can concurrently
    # download the dataset.
    if data_args.dataset_name is not None:
        # Downloading and loading a dataset from the hub.
        raw_datasets = load_dataset(
            data_args.dataset_name, data_args.dataset_config_name, cache_dir=model_args.cache_dir
        )
    else:
        data_files = {}
        if data_args.train_file is not None:
            data_files["train"] = data_args.train_file
            extension = data_args.train_file.split(".")[-1]
        if data_args.validation_file is not None:
            data_files["validation"] = data_args.validation_file
            extension = data_args.validation_file.split(".")[-1]
        if data_args.test_file is not None:
            data_files["test"] = data_args.test_file
            extension = data_args.test_file.split(".")[-1]
        raw_datasets = load_dataset(extension, data_files=data_files, cache_dir=model_args.cache_dir)
    # See more about loading any type of standard or custom dataset (from files, python dict, pandas DataFrame, etc) at
    # https://huggingface.co/docs/datasets/loading_datasets.html.

    # 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,
        cache_dir=model_args.cache_dir,
        revision=model_args.model_revision,
        use_auth_token=True if model_args.use_auth_token else None,
    )

    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,
        use_fast=model_args.use_fast_tokenizer,
        revision=model_args.model_revision,
        use_auth_token=True if model_args.use_auth_token else None,
    )

    # tokenizer.add_special_tokens({'pad_token': tokenizer.eos_token})

    tokenizer.add_special_tokens({'pad_token': '[PAD]'})

    # 将pad_token替换为eos_token

    print(f"Vocab size: {len(tokenizer)}")

    model = GPT2LMHeadModel.from_pretrained(
        model_args.model_name_or_path,
        from_tf=bool(".ckpt" in model_args.model_name_or_path),
        config=config,
        cache_dir=model_args.cache_dir,
        revision=model_args.model_revision,
        use_auth_token=True if model_args.use_auth_token else None,
    )

    model.resize_token_embeddings(len(tokenizer))
    # Preprocessing the datasets.
    # We need to tokenize inputs and targets.
    if training_args.do_train:
        column_names = raw_datasets["train"].column_names
    elif training_args.do_eval:
        column_names = raw_datasets["validation"].column_names
    elif training_args.do_predict:
        column_names = raw_datasets["test"].column_names
    else:
        logger.info("There is nothing to do. Please pass `do_train`, `do_eval` and/or `do_predict`.")
        return

    # Get the column names for input/target.
    dataset_columns = summarization_name_mapping.get(data_args.dataset_name, None)
    if data_args.text_column is None:
        text_column = dataset_columns[0] if dataset_columns is not None else column_names[0]
    else:
        text_column = data_args.text_column
        if text_column not in column_names:
            raise ValueError(
                f"--text_column' value '{data_args.text_column}' needs to be one of: {', '.join(column_names)}"
            )

    if data_args.summary_column is None:
        summary_column = dataset_columns[1] if dataset_columns is not None else column_names[1]
    else:
        summary_column = data_args.summary_column
        if summary_column not in column_names:
            raise ValueError(
                f"--summary_column' value '{data_args.summary_column}' needs to be one of: {', '.join(column_names)}"
            )

    # Temporarily set max_target_length for training.
    max_target_length = data_args.max_target_length
    padding = "max_length" if data_args.pad_to_max_length else False

    padding = "max_length"

    print("--------------")
    print(padding)

    if training_args.label_smoothing_factor > 0 and not hasattr(model, "prepare_decoder_input_ids_from_labels"):
        logger.warning(
            "label_smoothing is enabled but the `prepare_decoder_input_ids_from_labels` method is not defined for"
            f"`{model.__class__.__name__}`. This will lead to loss being calculated twice and will take up more memory"
        )

    def preprocess_function(examples):
        # remove pairs where at least one record is None

        inputs, targets = [], []
        for i in range(len(examples[text_column])):
            if examples[text_column][i] is not None and examples[summary_column][i] is not None:
                inputs.append(examples[text_column][i])
                targets.append(examples[summary_column][i])
        cat_inputs = []
        for i, t in zip(inputs, targets):
            inp = ""

            inp += f"{i} {tokenizer.eos_token} "
            inp += f"{t} {tokenizer.eos_token}"
            # inp = inp + i + " " + tokenizer.eos_token + " " + t + " " + + tokenizer.eos_token
            # print(inp)
            cat_inputs.append(inp)

        model_inputs = tokenizer(cat_inputs, max_length=data_args.max_source_length, padding=padding, truncation=True)

        with tokenizer.as_target_tokenizer():
            labels = tokenizer(cat_inputs, max_length=data_args.max_source_length, padding=padding, truncation=True)

        if padding == "max_length" and data_args.ignore_pad_token_for_loss:
            labels["input_ids"] = [
                [(l if l != tokenizer.pad_token_id else -100) for l in label] for label in labels["input_ids"]
            ]

        model_inputs["labels"] = labels["input_ids"]
        # print(labels["input_ids"])

        # model_inputs["labels"] = model_inputs["input_ids"]
        return model_inputs

    def preprocess_function_eval(examples):
        # remove pairs where at least one record is None

        inputs, targets = [], []
        for i in range(len(examples[text_column])):
            if examples[text_column][i] is not None and examples[summary_column][i] is not None:
                inputs.append(examples[text_column][i])
                targets.append(examples[summary_column][i])
        cat_inputs = []
        cat_labels = []
        for i, t in zip(inputs, targets):
            inp = ""
            inp += f"{i} {tokenizer.eos_token} "
            oup = ""
            oup += f"{i} {tokenizer.eos_token} "
            oup += f"{t} {tokenizer.eos_token}"
            cat_inputs.append(inp)
            cat_labels.append(oup)
        model_inputs = tokenizer(cat_inputs, max_length=data_args.max_source_length, padding=padding, truncation=True)

        with tokenizer.as_target_tokenizer():
            labels = tokenizer(cat_labels, max_length=data_args.max_source_length, padding=padding, truncation=True)
        if padding == "max_length" and data_args.ignore_pad_token_for_loss:
            labels["input_ids"] = [
                [(l if l != tokenizer.pad_token_id else -100) for l in label] for label in labels["input_ids"]
            ]
        model_inputs["labels"] = labels["input_ids"]
        return model_inputs

    if training_args.do_train:
        if "train" not in raw_datasets:
            raise ValueError("--do_train requires a train dataset")
        train_dataset = raw_datasets["train"]
        if data_args.max_train_samples is not None:
            train_dataset = train_dataset.select(range(data_args.max_train_samples))
        with training_args.main_process_first(desc="train dataset map pre-processing"):
            train_dataset = train_dataset.map(
                preprocess_function,
                batched=True,
                num_proc=data_args.preprocessing_num_workers,
                remove_columns=column_names,
                load_from_cache_file=not data_args.overwrite_cache,
                desc="Running tokenizer on train dataset",
            )

    if training_args.do_eval:
        max_target_length = data_args.val_max_target_length
        if "validation" not in raw_datasets:
            raise ValueError("--do_eval requires a validation dataset")
        eval_dataset = raw_datasets["validation"]
        if data_args.max_eval_samples is not None:
            eval_dataset = eval_dataset.select(range(data_args.max_eval_samples))
        with training_args.main_process_first(desc="validation dataset map pre-processing"):
            eval_dataset = eval_dataset.map(
                preprocess_function_eval,
                batched=True,
                num_proc=data_args.preprocessing_num_workers,
                remove_columns=column_names,
                load_from_cache_file=not data_args.overwrite_cache,
                desc="Running tokenizer on validation dataset",
            )

    if training_args.do_predict:
        max_target_length = data_args.val_max_target_length
        if "test" not in raw_datasets:
            raise ValueError("--do_predict requires a test dataset")
        predict_dataset = raw_datasets["test"]
        if data_args.max_predict_samples is not None:
            predict_dataset = predict_dataset.select(range(data_args.max_predict_samples))
        with training_args.main_process_first(desc="prediction dataset map pre-processing"):
            predict_dataset = predict_dataset.map(
                preprocess_function_eval,
                batched=True,
                num_proc=data_args.preprocessing_num_workers,
                remove_columns=column_names,
                load_from_cache_file=not data_args.overwrite_cache,
                desc="Running tokenizer on prediction dataset",
            )

    data_collator = DataCollatorWithPadding(
        tokenizer,
        padding=True
    )

    def compute_metrics(eval_preds):
        preds, labels = eval_preds
        if isinstance(preds, tuple):
            preds = preds[0]
        decoded_preds = tokenizer.batch_decode(preds, skip_special_tokens=True)
        if data_args.ignore_pad_token_for_loss:
            # Replace -100 in the labels as we can't decode them.
            labels = np.where(labels != -100, labels, tokenizer.pad_token_id)
        decoded_labels = tokenizer.batch_decode(labels, skip_special_tokens=True)

        # Some simple post-processing
        # decoded_preds, decoded_labels = postprocess_text(decoded_preds, decoded_labels)

        # result = metric.compute(predictions=decoded_preds, references=decoded_labels, use_stemmer=True)
        result = compute_bleu(decoded_preds, decoded_labels)
        # Extract a few results from ROUGE
        result = {key: value * 100 for key, value in result.items()}
        # result = {key: value.mid.fmeasure * 100 for key, value in result.items()}

        prediction_lens = [np.count_nonzero(pred != tokenizer.pad_token_id) for pred in preds]
        result["gen_len"] = np.mean(prediction_lens)
        result = {k: round(v, 4) for k, v in result.items()}
        return result

    # Initialize our Trainer
    trainer = GPTTrainer(
        model=model,
        args=training_args,
        train_dataset=train_dataset if training_args.do_train else None,
        eval_dataset=eval_dataset if training_args.do_eval else None,
        tokenizer=tokenizer,
        compute_metrics=compute_metrics if training_args.predict_with_generate else None,
    )

    # Training
    if training_args.do_train:
        checkpoint = None
        if training_args.resume_from_checkpoint is not None:
            checkpoint = training_args.resume_from_checkpoint
        elif last_checkpoint is not None:
            checkpoint = last_checkpoint
        train_result = trainer.train(resume_from_checkpoint=checkpoint)
        trainer.save_model()  # Saves the tokenizer too for easy upload

        metrics = train_result.metrics
        max_train_samples = (
            data_args.max_train_samples if data_args.max_train_samples is not None else len(train_dataset)
        )
        metrics["train_samples"] = min(max_train_samples, len(train_dataset))

        trainer.log_metrics("train", metrics)
        trainer.save_metrics("train", metrics)
        trainer.save_state()

    # Evaluation
    results = {}
    max_length = (
        training_args.generation_max_length
        if training_args.generation_max_length is not None
        else data_args.val_max_target_length
    )
    num_beams = data_args.num_beams if data_args.num_beams is not None else training_args.generation_num_beams
    if training_args.do_eval:
        logger.info("*** Evaluate ***")
        # metrics = trainer.evaluate(max_length=max_length, num_beams=num_beams, metric_key_prefix="eval")
        predict_results = trainer.predict(
            eval_dataset, metric_key_prefix="predict", max_length=max_length, num_beams=num_beams,
        )
        metrics = predict_results.metrics
        max_eval_samples = data_args.max_eval_samples if data_args.max_eval_samples is not None else len(eval_dataset)
        metrics["eval_samples"] = min(max_eval_samples, len(eval_dataset))

        predictions = []
        for i, gen_ids in enumerate(predict_results.predictions):
            sid = int(np.sum(eval_dataset[i]['attention_mask']))
            gen_ids = gen_ids[sid:]
            gen_sent = tokenizer.decode(gen_ids.tolist(), skip_special_tokens=True).strip()
            predictions.append(gen_sent)

        '''
        refference_inputs = []
        with open(data_args.validation_file, 'r') as r:
            for item in jsonlines.Reader(r):
                refference_inputs.append(item[text_column])

        truc_predictions = []


        all_predictions = tokenizer.batch_decode(
                    predict_results.predictions, skip_special_tokens=True, clean_up_tokenization_spaces=True
                )

        all_output_prediction_file = os.path.join(training_args.output_dir, "all_generated_predictions_eval_beam_5.txt")
        with open(all_output_prediction_file, "w") as writer:
            writer.write("\n".join(all_predictions))



        for inte, pred in zip(refference_inputs, predict_results.predictions):
            index = [x for x, y in list(enumerate(pred)) if y == tokenizer.eos_token_id]
            #inte_index = [x for x, y in list(enumerate(inte)) if y == tokenizer.eos_token_id]
            temp_pred = pred[index[-1]:]
            truc_pred = pred.copy()

            truc_pred[:len(temp_pred)] = temp_pred
            truc_predictions.append(truc_pred)



        predictions = tokenizer.batch_decode(
                    truc_predictions, skip_special_tokens=True, clean_up_tokenization_spaces=True
                )


        #predictions = [pred.replace(' ', '').strip() for pred in predictions]
        output_prediction_file = os.path.join(training_args.output_dir, "generated_predictions_eval_beam_5.txt")
        with open(output_prediction_file, "w") as writer:
            writer.write("\n".join(predictions))
        '''

        output_prediction_file = os.path.join(training_args.output_dir, "generated_predictions_eval_greedy_5.txt")
        with open(output_prediction_file, "w") as writer:
            writer.write("\n".join(predictions))

        refference_summaries = []

        raw_datasets["validation"]
        if data_args.max_eval_samples is not None:
            eval_dataset = eval_dataset.select(range(data_args.max_eval_samples))
        for s in eval_dataset.data.columns[2].chunks[0]:
            refference_summaries.append(str(s))
        #with open(data_args.validation_file, 'r') as r:
            #for item in jsonlines.Reader(r):
                #refference_summaries.append(item[summary_column])

        # rouge_scores = compute_rouges(predictions, refference_summaries)

        bleu_scores = compute_bleu(predictions, refference_summaries)

        print("Eval Metric:")
        # print(rouge_scores)
        print(bleu_scores)

        '''
        bleu_scores1 = compute_bleus(truc_predictions, refference_summaries)

        print(bleu_scores1)

        '''

    # trainer.log_metrics("eval", metrics)
    # trainer.save_metrics("eval", metrics)

    if training_args.do_predict:
        logger.info("*** Predict ***")

        predict_results = trainer.predict(
            predict_dataset, metric_key_prefix="predict", max_length=max_length, num_beams=num_beams,
        )
        metrics = predict_results.metrics
        max_predict_samples = (
            data_args.max_predict_samples if data_args.max_predict_samples is not None else len(predict_dataset)
        )
        metrics["predict_samples"] = min(max_predict_samples, len(predict_dataset))

        # trainer.log_metrics("predict", metrics)
        # trainer.save_metrics("predict", metrics)

        if trainer.is_world_process_zero():
            if training_args.predict_with_generate:
                predictions = tokenizer.batch_decode(
                    predict_results.predictions, skip_special_tokens=True, clean_up_tokenization_spaces=True
                )
                predictions = [pred.replace(' ', '').strip() for pred in predictions]
                output_prediction_file = os.path.join(training_args.output_dir, "generated_predictions_test.txt")
                with open(output_prediction_file, "w") as writer:
                    writer.write("\n".join(predictions))
                refference_summaries = []

                for s in raw_datasets["test"].data.columns[2].chunks[0]:
                    refference_summaries.append(str(s))
                #with open(data_args.test_file, 'r') as r:
                #    for item in jsonlines.Reader(r):
                #        refference_summaries.append(item[summary_column])
                # rouge_scores = compute_rouges(predictions, refference_summaries)
                bleu_scores = compute_bleu(predictions, refference_summaries)
                print("Prediction Metric:")
                # print(rouge_scores)
                print(bleu_scores)

    kwargs = {"finetuned_from": model_args.model_name_or_path, "tasks": "summarization"}
    if data_args.dataset_name is not None:
        kwargs["dataset_tags"] = data_args.dataset_name
        if data_args.dataset_config_name is not None:
            kwargs["dataset_args"] = data_args.dataset_config_name
            kwargs["dataset"] = f"{data_args.dataset_name} {data_args.dataset_config_name}"
        else:
            kwargs["dataset"] = data_args.dataset_name
    if data_args.lang is not None:
        kwargs["language"] = data_args.lang
    '''
    if training_args.push_to_hub:
        trainer.push_to_hub(**kwargs)
    else:
        trainer.create_model_card(**kwargs)
    '''

    return results


if __name__ == "__main__":
    main()