diff --git a/auto_transformers.py b/auto_transformers.py index 189bc5c..01b92c8 100644 --- a/auto_transformers.py +++ b/auto_transformers.py @@ -17,7 +17,8 @@ import os import torch import shutil from pathlib import Path -from transformers import AutoTokenizer, AutoModel + +from transformers import AutoTokenizer, AutoModel, AutoModelForMaskedLM, AutoModelForCausalLM from towhee.operator import NNOperator from towhee import register @@ -25,6 +26,9 @@ from towhee import register import warnings import logging +from train_mlm_with_hf_trainer import train_mlm_with_hf_trainer +from train_clm_with_hf_trainer import train_clm_with_hf_trainer + log = logging.getLogger('run_op') warnings.filterwarnings('ignore') @@ -39,7 +43,8 @@ class AutoTransformers(NNOperator): Which model to use for the embeddings. """ - def __init__(self, model_name: str = None, device: str = None) -> None: + def __init__(self, model_name: str = None, device: str = None, pretrain_weights_path=None, + load_pretrain_f=None, tokenizer=None) -> None: super().__init__() if device is None: device = 'cuda' if torch.cuda.is_available() else 'cpu' @@ -49,8 +54,6 @@ class AutoTransformers(NNOperator): if self.model_name: try: self.model = AutoModel.from_pretrained(model_name).to(self.device) - self.model.eval() - self.configs = self.model.config except Exception as e: model_list = self.supported_model_names() @@ -59,11 +62,19 @@ class AutoTransformers(NNOperator): else: log.error(f"Fail to load model by name: {self.model_name}") raise e - try: - self.tokenizer = AutoTokenizer.from_pretrained(model_name) - except Exception as e: - log.error(f'Fail to load tokenizer by name: {self.model_name}') - raise e + if pretrain_weights_path is not None: + if load_pretrain_f is None: + state_dict = torch.load(pretrain_weights_path, map_location='cpu') + self.model.load_state_dict(state_dict) + else: + self.model = load_pretrain_f(self.model, pretrain_weights_path) + self.model.eval() + if tokenizer is None: + try: + self.tokenizer = AutoTokenizer.from_pretrained(model_name) + except Exception as e: + log.error(f'Fail to load tokenizer by name: {self.model_name}') + raise e else: log.warning('The operator is initialized without specified model.') pass @@ -340,3 +351,40 @@ class AutoTransformers(NNOperator): else: log.error(f'Invalid format "{format}". Currently supported formats: "pytorch", "torchscript".') return model_list + + def train(self, training_config=None, + train_dataset=None, + eval_dataset=None, + resume_checkpoint_path=None, **kwargs): + task = kwargs.pop('task', None) + data_args = kwargs.pop('data_args', None) + training_args = kwargs.pop('training_args', None) + prepare_model_weights_f = kwargs.pop('prepare_model_weights_f', None) + + if task == 'mlm' or task is None: + model_with_head = AutoModelForMaskedLM.from_pretrained(self.model_name) + if prepare_model_weights_f is not None: + model_with_head = prepare_model_weights_f(self.model, model_with_head, **kwargs) + + train_mlm_with_hf_trainer( + model_with_head, + self.tokenizer, + data_args, + training_args, + **kwargs + ) + elif task == 'clm': + model_with_head = AutoModelForCausalLM.from_pretrained(self.model_name) + if prepare_model_weights_f is not None: + model_with_head = prepare_model_weights_f(self.model, model_with_head, **kwargs) + + train_clm_with_hf_trainer( + model_with_head, + self.tokenizer, + data_args, + training_args, + **kwargs + ) + + + diff --git a/train_clm_with_hf_trainer.py b/train_clm_with_hf_trainer.py new file mode 100644 index 0000000..b3f6ef5 --- /dev/null +++ b/train_clm_with_hf_trainer.py @@ -0,0 +1,418 @@ +# This script is hacked and modified from https://github.com/huggingface/transformers/blob/main/examples/pytorch/language-modeling/run_clm.py +# For more specified training tasks, please refer https://github.com/huggingface/transformers/tree/main/examples/pytorch +import dataclasses +import logging +import math +import os +import sys +from dataclasses import dataclass, field +from itertools import chain +from typing import Optional + +import datasets +from datasets import load_dataset + +import evaluate +import transformers +from transformers import ( + MODEL_FOR_CAUSAL_LM_MAPPING, + Trainer, + TrainingArguments, + default_data_collator, + is_torch_tpu_available, + set_seed, +) +from transformers.testing_utils import CaptureLogger +from transformers.trainer_utils import get_last_checkpoint + + + +logger = logging.getLogger(__name__) + + +MODEL_CONFIG_CLASSES = list(MODEL_FOR_CAUSAL_LM_MAPPING.keys()) +MODEL_TYPES = tuple(conf.model_type for conf in MODEL_CONFIG_CLASSES) + + +def dataclass_from_dict(klass, d): + try: + fieldtypes = {f.name: f.type for f in dataclasses.fields(klass)} + return klass(**{f: dataclass_from_dict(fieldtypes[f], d[f]) for f in d}) + except: + return d # Not a dataclass field + + + +@dataclass +class DataTrainingArguments: + """ + Arguments pertaining to what data we are going to input our model for training and eval. + """ + + 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)."} + ) + train_file: Optional[str] = field(default=None, metadata={"help": "The input training data file (a text file)."}) + validation_file: Optional[str] = field( + default=None, + metadata={"help": "An optional input evaluation data file to evaluate the perplexity on (a text file)."}, + ) + 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." + ) + }, + ) + + block_size: Optional[int] = field( + default=None, + metadata={ + "help": ( + "Optional input sequence length after tokenization. " + "The training dataset will be truncated in block of this size for training. " + "Default to the model max input length for single sentence inputs (take into account special tokens)." + ) + }, + ) + overwrite_cache: bool = field( + default=False, metadata={"help": "Overwrite the cached training and evaluation sets"} + ) + validation_split_percentage: Optional[int] = field( + default=5, + metadata={ + "help": "The percentage of the train set used as validation set in case there's no validation split" + }, + ) + preprocessing_num_workers: Optional[int] = field( + default=None, + metadata={"help": "The number of processes to use for the preprocessing."}, + ) + keep_linebreaks: bool = field( + default=True, metadata={"help": "Whether to keep line breaks when using TXT files or not."} + ) + + 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", "txt"], "`train_file` should be a csv, a json or a txt file." + if self.validation_file is not None: + extension = self.validation_file.split(".")[-1] + assert extension in ["csv", "json", "txt"], "`validation_file` should be a csv, a json or a txt file." + + +def train_clm_with_hf_trainer(model, + tokenizer, + data_args, + training_args, + **kwargs): + print('train clm with hugging face transformers trainer') + + data_args = dataclass_from_dict(DataTrainingArguments, data_args) + training_args = dataclass_from_dict(TrainingArguments, training_args) + + # 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}") + + # Detecting last checkpoint. + last_checkpoint = None + 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/TXT 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 column called 'text' or the first column if no column called + # 'text' is found. You can easily tweak this behavior (see below). + # + # 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, + # use_auth_token=True if model_args.use_auth_token else None, + ) + if "validation" not in raw_datasets.keys(): + raw_datasets["validation"] = load_dataset( + data_args.dataset_name, + data_args.dataset_config_name, + split=f"train[:{data_args.validation_split_percentage}%]", + # cache_dir=model_args.cache_dir, + # use_auth_token=True if model_args.use_auth_token else None, + ) + raw_datasets["train"] = load_dataset( + data_args.dataset_name, + data_args.dataset_config_name, + split=f"train[{data_args.validation_split_percentage}%:]", + # cache_dir=model_args.cache_dir, + # use_auth_token=True if model_args.use_auth_token else None, + ) + else: + data_files = {} + dataset_args = {} + if data_args.train_file is not None: + data_files["train"] = data_args.train_file + if data_args.validation_file is not None: + data_files["validation"] = data_args.validation_file + extension = ( + data_args.train_file.split(".")[-1] + if data_args.train_file is not None + else data_args.validation_file.split(".")[-1] + ) + if extension == "txt": + extension = "text" + dataset_args["keep_linebreaks"] = data_args.keep_linebreaks + raw_datasets = load_dataset( + extension, + data_files=data_files, + # cache_dir=model_args.cache_dir, + # use_auth_token=True if model_args.use_auth_token else None, + **dataset_args, + ) + # If no validation data is there, validation_split_percentage will be used to divide the dataset. + if "validation" not in raw_datasets.keys(): + raw_datasets["validation"] = load_dataset( + extension, + data_files=data_files, + split=f"train[:{data_args.validation_split_percentage}%]", + # cache_dir=model_args.cache_dir, + # use_auth_token=True if model_args.use_auth_token else None, + **dataset_args, + ) + raw_datasets["train"] = load_dataset( + extension, + data_files=data_files, + split=f"train[{data_args.validation_split_percentage}%:]", + # cache_dir=model_args.cache_dir, + # use_auth_token=True if model_args.use_auth_token else None, + **dataset_args, + ) + + # 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. + + # We resize the embeddings only when necessary to avoid index errors. If you are creating a model from scratch + # on a small vocab and want a smaller embedding size, remove this test. + embedding_size = model.get_input_embeddings().weight.shape[0] + if len(tokenizer) > embedding_size: + model.resize_token_embeddings(len(tokenizer)) + + # Preprocessing the datasets. + # First we tokenize all the texts. + if training_args.do_train: + column_names = raw_datasets["train"].column_names + else: + column_names = raw_datasets["validation"].column_names + text_column_name = "text" if "text" in column_names else column_names[0] + + # since this will be pickled to avoid _LazyModule error in Hasher force logger loading before tokenize_function + tok_logger = transformers.utils.logging.get_logger("transformers.tokenization_utils_base") + + def tokenize_function(examples): + with CaptureLogger(tok_logger) as cl: + output = tokenizer(examples[text_column_name]) + # clm input could be much much longer than block_size + if "Token indices sequence length is longer than the" in cl.out: + tok_logger.warning( + "^^^^^^^^^^^^^^^^ Please ignore the warning above - this long input will be chunked into smaller bits" + " before being passed to the model." + ) + return output + + with training_args.main_process_first(desc="dataset map tokenization"): + tokenized_datasets = raw_datasets.map( + tokenize_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 dataset", + ) + + if data_args.block_size is None: + block_size = tokenizer.model_max_length + if block_size > 1024: + logger.warning( + f"The tokenizer picked seems to have a very large `model_max_length` ({tokenizer.model_max_length}). " + "Picking 1024 instead. You can change that default value by passing --block_size xxx." + ) + block_size = 1024 + else: + if data_args.block_size > tokenizer.model_max_length: + logger.warning( + f"The block_size passed ({data_args.block_size}) is larger than the maximum length for the model" + f"({tokenizer.model_max_length}). Using block_size={tokenizer.model_max_length}." + ) + block_size = min(data_args.block_size, tokenizer.model_max_length) + + # Main data processing function that will concatenate all texts from our dataset and generate chunks of block_size. + def group_texts(examples): + # Concatenate all texts. + concatenated_examples = {k: list(chain(*examples[k])) for k in examples.keys()} + total_length = len(concatenated_examples[list(examples.keys())[0]]) + # We drop the small remainder, we could add padding if the model supported it instead of this drop, you can + # customize this part to your needs. + if total_length >= block_size: + total_length = (total_length // block_size) * block_size + # Split by chunks of max_len. + result = { + k: [t[i : i + block_size] for i in range(0, total_length, block_size)] + for k, t in concatenated_examples.items() + } + result["labels"] = result["input_ids"].copy() + return result + + # Note that with `batched=True`, this map processes 1,000 texts together, so group_texts throws away a remainder + # for each of those groups of 1,000 texts. You can adjust that batch_size here but a higher value might be slower + # to preprocess. + # + # To speed up this part, we use multiprocessing. See the documentation of the map method for more information: + # https://huggingface.co/docs/datasets/package_reference/main_classes.html#datasets.Dataset.map + + with training_args.main_process_first(desc="grouping texts together"): + lm_datasets = tokenized_datasets.map( + group_texts, + batched=True, + num_proc=data_args.preprocessing_num_workers, + load_from_cache_file=not data_args.overwrite_cache, + desc=f"Grouping texts in chunks of {block_size}", + ) + + if training_args.do_train: + if "train" not in tokenized_datasets: + raise ValueError("--do_train requires a train dataset") + train_dataset = lm_datasets["train"] + if data_args.max_train_samples is not None: + max_train_samples = min(len(train_dataset), data_args.max_train_samples) + train_dataset = train_dataset.select(range(max_train_samples)) + + if training_args.do_eval: + if "validation" not in tokenized_datasets: + raise ValueError("--do_eval requires a validation dataset") + eval_dataset = lm_datasets["validation"] + if data_args.max_eval_samples is not None: + max_eval_samples = min(len(eval_dataset), data_args.max_eval_samples) + eval_dataset = eval_dataset.select(range(max_eval_samples)) + + def preprocess_logits_for_metrics(logits, labels): + if isinstance(logits, tuple): + # Depending on the model and config, logits may contain extra tensors, + # like past_key_values, but logits always come first + logits = logits[0] + return logits.argmax(dim=-1) + + metric = evaluate.load("accuracy") + + def compute_metrics(eval_preds): + preds, labels = eval_preds + # preds have the same shape as the labels, after the argmax(-1) has been calculated + # by preprocess_logits_for_metrics but we need to shift the labels + labels = labels[:, 1:].reshape(-1) + preds = preds[:, :-1].reshape(-1) + return metric.compute(predictions=preds, references=labels) + + # Initialize our Trainer + trainer = Trainer( + 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, + # Data collator will default to DataCollatorWithPadding, so we change it. + data_collator=default_data_collator, + compute_metrics=compute_metrics if training_args.do_eval and not is_torch_tpu_available() else None, + preprocess_logits_for_metrics=preprocess_logits_for_metrics + if training_args.do_eval and not is_torch_tpu_available() + 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 + if training_args.do_eval: + logger.info("*** Evaluate ***") + + metrics = trainer.evaluate() + + 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)) + try: + perplexity = math.exp(metrics["eval_loss"]) + except OverflowError: + perplexity = float("inf") + metrics["perplexity"] = perplexity + + trainer.log_metrics("eval", metrics) + trainer.save_metrics("eval", metrics) + + print('done clm.') \ No newline at end of file diff --git a/train_mlm_with_hf_trainer.py b/train_mlm_with_hf_trainer.py new file mode 100644 index 0000000..97e6c24 --- /dev/null +++ b/train_mlm_with_hf_trainer.py @@ -0,0 +1,452 @@ +# This script is hacked and modified from https://github.com/huggingface/transformers/blob/main/examples/pytorch/language-modeling/run_mlm.py +# For more specified training tasks, please refer https://github.com/huggingface/transformers/tree/main/examples/pytorch +import dataclasses +import logging +import math +import os +import sys +from dataclasses import dataclass, field +from itertools import chain +from typing import Optional + +import datasets +from datasets import load_dataset + +import evaluate +import transformers +from transformers import ( + MODEL_FOR_MASKED_LM_MAPPING, + DataCollatorForLanguageModeling, + Trainer, + TrainingArguments, + is_torch_tpu_available, + set_seed, +) +from transformers.trainer_utils import get_last_checkpoint + + +logger = logging.getLogger(__name__) +MODEL_CONFIG_CLASSES = list(MODEL_FOR_MASKED_LM_MAPPING.keys()) +MODEL_TYPES = tuple(conf.model_type for conf in MODEL_CONFIG_CLASSES) + + +def dataclass_from_dict(klass, d): + try: + fieldtypes = {f.name: f.type for f in dataclasses.fields(klass)} + return klass(**{f: dataclass_from_dict(fieldtypes[f], d[f]) for f in d}) + except: + return d # Not a dataclass field + + +@dataclass +class DataTrainingArguments: + """ + Arguments pertaining to what data we are going to input our model for training and eval. + """ + + 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)."} + ) + train_file: Optional[str] = field(default=None, metadata={"help": "The input training data file (a text file)."}) + validation_file: Optional[str] = field( + default=None, + metadata={"help": "An optional input evaluation data file to evaluate the perplexity on (a text file)."}, + ) + overwrite_cache: bool = field( + default=False, metadata={"help": "Overwrite the cached training and evaluation sets"} + ) + validation_split_percentage: Optional[int] = field( + default=5, + metadata={ + "help": "The percentage of the train set used as validation set in case there's no validation split" + }, + ) + max_seq_length: Optional[int] = field( + default=None, + metadata={ + "help": ( + "The maximum total input sequence length after tokenization. Sequences longer " + "than this will be truncated." + ) + }, + ) + preprocessing_num_workers: Optional[int] = field( + default=None, + metadata={"help": "The number of processes to use for the preprocessing."}, + ) + mlm_probability: float = field( + default=0.15, metadata={"help": "Ratio of tokens to mask for masked language modeling loss"} + ) + line_by_line: bool = field( + default=False, + metadata={"help": "Whether distinct lines of text in the dataset are to be handled as distinct sequences."}, + ) + pad_to_max_length: bool = field( + default=False, + metadata={ + "help": ( + "Whether to pad all samples to `max_seq_length`. " + "If False, will pad the samples dynamically when batching to the maximum length in the batch." + ) + }, + ) + 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." + ) + }, + ) + + 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] + if extension not in ["csv", "json", "txt"]: + raise ValueError("`train_file` should be a csv, a json or a txt file.") + if self.validation_file is not None: + extension = self.validation_file.split(".")[-1] + if extension not in ["csv", "json", "txt"]: + raise ValueError("`validation_file` should be a csv, a json or a txt file.") + + +def train_mlm_with_hf_trainer(model, + tokenizer, + data_args, + training_args, + **kwargs): + print('train mlm with hugging face transformers trainer') + + data_args = dataclass_from_dict(DataTrainingArguments, data_args) + training_args = dataclass_from_dict(TrainingArguments, training_args) + + # 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}" + ) + # Set the verbosity to info of the Transformers logger (on main process only): + logger.info(f"Training/evaluation parameters {training_args}") + + # Detecting last checkpoint. + last_checkpoint = None + 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/TXT 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 column called 'text' or the first column. You can easily tweak this + # behavior (see below) + # + # 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, + # use_auth_token=True if model_args.use_auth_token else None, + ) + if "validation" not in raw_datasets.keys(): + raw_datasets["validation"] = load_dataset( + data_args.dataset_name, + data_args.dataset_config_name, + split=f"train[:{data_args.validation_split_percentage}%]", + # cache_dir=model_args.cache_dir, + # use_auth_token=True if model_args.use_auth_token else None, + ) + raw_datasets["train"] = load_dataset( + data_args.dataset_name, + data_args.dataset_config_name, + split=f"train[{data_args.validation_split_percentage}%:]", + # cache_dir=model_args.cache_dir, + # use_auth_token=True if model_args.use_auth_token else None, + ) + 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 extension == "txt": + extension = "text" + raw_datasets = load_dataset( + extension, + data_files=data_files, + # cache_dir=model_args.cache_dir, + # use_auth_token=True if model_args.use_auth_token else None, + ) + + # If no validation data is there, validation_split_percentage will be used to divide the dataset. + if "validation" not in raw_datasets.keys(): + raw_datasets["validation"] = load_dataset( + extension, + data_files=data_files, + split=f"train[:{data_args.validation_split_percentage}%]", + # cache_dir=model_args.cache_dir, + # use_auth_token=True if model_args.use_auth_token else None, + ) + raw_datasets["train"] = load_dataset( + extension, + data_files=data_files, + split=f"train[{data_args.validation_split_percentage}%:]", + # cache_dir=model_args.cache_dir, + # use_auth_token=True if model_args.use_auth_token else None, + ) + + # 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. + + # We resize the embeddings only when necessary to avoid index errors. If you are creating a model from scratch + # on a small vocab and want a smaller embedding size, remove this test. + embedding_size = model.get_input_embeddings().weight.shape[0] + if len(tokenizer) > embedding_size: + model.resize_token_embeddings(len(tokenizer)) + + # Preprocessing the datasets. + # First we tokenize all the texts. + if training_args.do_train: + column_names = raw_datasets["train"].column_names + else: + column_names = raw_datasets["validation"].column_names + text_column_name = "text" if "text" in column_names else column_names[0] + + if data_args.max_seq_length is None: + max_seq_length = tokenizer.model_max_length + if max_seq_length > 1024: + logger.warning( + f"The tokenizer picked seems to have a very large `model_max_length` ({tokenizer.model_max_length}). " + "Picking 1024 instead. You can change that default value by passing --max_seq_length xxx." + ) + max_seq_length = 1024 + else: + if data_args.max_seq_length > tokenizer.model_max_length: + logger.warning( + f"The max_seq_length passed ({data_args.max_seq_length}) is larger than the maximum length for the" + f"model ({tokenizer.model_max_length}). Using max_seq_length={tokenizer.model_max_length}." + ) + max_seq_length = min(data_args.max_seq_length, tokenizer.model_max_length) + + if data_args.line_by_line: + # When using line_by_line, we just tokenize each nonempty line. + padding = "max_length" if data_args.pad_to_max_length else False + + def tokenize_function(examples): + # Remove empty lines + examples[text_column_name] = [ + line for line in examples[text_column_name] if len(line) > 0 and not line.isspace() + ] + return tokenizer( + examples[text_column_name], + padding=padding, + truncation=True, + max_length=max_seq_length, + # We use this option because DataCollatorForLanguageModeling (see below) is more efficient when it + # receives the `special_tokens_mask`. + return_special_tokens_mask=True, + ) + + with training_args.main_process_first(desc="dataset map tokenization"): + tokenized_datasets = raw_datasets.map( + tokenize_function, + batched=True, + num_proc=data_args.preprocessing_num_workers, + remove_columns=[text_column_name], + load_from_cache_file=not data_args.overwrite_cache, + desc="Running tokenizer on dataset line_by_line", + ) + else: + # Otherwise, we tokenize every text, then concatenate them together before splitting them in smaller parts. + # We use `return_special_tokens_mask=True` because DataCollatorForLanguageModeling (see below) is more + # efficient when it receives the `special_tokens_mask`. + def tokenize_function(examples): + return tokenizer(examples[text_column_name], return_special_tokens_mask=True) + + with training_args.main_process_first(desc="dataset map tokenization"): + tokenized_datasets = raw_datasets.map( + tokenize_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 every text in dataset", + ) + + # Main data processing function that will concatenate all texts from our dataset and generate chunks of + # max_seq_length. + def group_texts(examples): + # Concatenate all texts. + concatenated_examples = {k: list(chain(*examples[k])) for k in examples.keys()} + total_length = len(concatenated_examples[list(examples.keys())[0]]) + # We drop the small remainder, we could add padding if the model supported it instead of this drop, you can + # customize this part to your needs. + if total_length >= max_seq_length: + total_length = (total_length // max_seq_length) * max_seq_length + # Split by chunks of max_len. + result = { + k: [t[i: i + max_seq_length] for i in range(0, total_length, max_seq_length)] + for k, t in concatenated_examples.items() + } + return result + + # Note that with `batched=True`, this map processes 1,000 texts together, so group_texts throws away a + # remainder for each of those groups of 1,000 texts. You can adjust that batch_size here but a higher value + # might be slower to preprocess. + # + # To speed up this part, we use multiprocessing. See the documentation of the map method for more information: + # https://huggingface.co/docs/datasets/package_reference/main_classes.html#datasets.Dataset.map + + with training_args.main_process_first(desc="grouping texts together"): + tokenized_datasets = tokenized_datasets.map( + group_texts, + batched=True, + num_proc=data_args.preprocessing_num_workers, + load_from_cache_file=not data_args.overwrite_cache, + desc=f"Grouping texts in chunks of {max_seq_length}", + ) + + if training_args.do_train: + if "train" not in tokenized_datasets: + raise ValueError("--do_train requires a train dataset") + train_dataset = tokenized_datasets["train"] + if data_args.max_train_samples is not None: + max_train_samples = min(len(train_dataset), data_args.max_train_samples) + train_dataset = train_dataset.select(range(max_train_samples)) + + if training_args.do_eval: + if "validation" not in tokenized_datasets: + raise ValueError("--do_eval requires a validation dataset") + eval_dataset = tokenized_datasets["validation"] + if data_args.max_eval_samples is not None: + max_eval_samples = min(len(eval_dataset), data_args.max_eval_samples) + eval_dataset = eval_dataset.select(range(max_eval_samples)) + + def preprocess_logits_for_metrics(logits, labels): + if isinstance(logits, tuple): + # Depending on the model and config, logits may contain extra tensors, + # like past_key_values, but logits always come first + logits = logits[0] + return logits.argmax(dim=-1) + + metric = evaluate.load("accuracy") + + def compute_metrics(eval_preds): + preds, labels = eval_preds + # preds have the same shape as the labels, after the argmax(-1) has been calculated + # by preprocess_logits_for_metrics + labels = labels.reshape(-1) + preds = preds.reshape(-1) + mask = labels != -100 + labels = labels[mask] + preds = preds[mask] + return metric.compute(predictions=preds, references=labels) + + # Data collator + # This one will take care of randomly masking the tokens. + pad_to_multiple_of_8 = data_args.line_by_line and training_args.fp16 and not data_args.pad_to_max_length + data_collator = DataCollatorForLanguageModeling( + tokenizer=tokenizer, + mlm_probability=data_args.mlm_probability, + pad_to_multiple_of=8 if pad_to_multiple_of_8 else None, + ) + + # Initialize our Trainer + trainer = Trainer( + 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, + data_collator=data_collator, + compute_metrics=compute_metrics if training_args.do_eval and not is_torch_tpu_available() else None, + preprocess_logits_for_metrics=preprocess_logits_for_metrics + if training_args.do_eval and not is_torch_tpu_available() + 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 + if training_args.do_eval: + logger.info("*** Evaluate ***") + + metrics = trainer.evaluate() + + 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)) + try: + perplexity = math.exp(metrics["eval_loss"]) + except OverflowError: + perplexity = float("inf") + metrics["perplexity"] = perplexity + + trainer.log_metrics("eval", metrics) + trainer.save_metrics("eval", metrics) + + print('done mlm.') \ No newline at end of file