


"""simple docstring"""






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

import torch
from torch import nn
from torch.utils.data import DistributedSampler, RandomSampler

from transformers import PreTrainedModel, Trainer, logging
from transformers.integrations import is_fairscale_available
from transformers.models.fsmt.configuration_fsmt import FSMTConfig
from transformers.optimization import (
    Adafactor,
    AdamW,
    get_constant_schedule,
    get_constant_schedule_with_warmup,
    get_cosine_schedule_with_warmup,
    get_cosine_with_hard_restarts_schedule_with_warmup,
    get_linear_schedule_with_warmup,
    get_polynomial_decay_schedule_with_warmup,
)
from transformers.trainer_pt_utils import get_tpu_sampler
from transformers.training_args import ParallelMode
from transformers.utils import is_torch_tpu_available


if is_fairscale_available():
	from fairscale.optim import OSS


__snake_case							:     Dict   =					logging.get_logger(__name__)

__snake_case							:     Union[str, Any]   =					{
    'linear': get_linear_schedule_with_warmup,
    'cosine': get_cosine_schedule_with_warmup,
    'cosine_w_restarts': get_cosine_with_hard_restarts_schedule_with_warmup,
    'polynomial': get_polynomial_decay_schedule_with_warmup,
    'constant': get_constant_schedule,
    'constant_w_warmup': get_constant_schedule_with_warmup,
}



class     A__     (						UpperCamelCase_							):




	'''simple docstring'''





	def __init__(  self:	Union[str, Any] ,    _SCREAMING_SNAKE_CASE:	Union[str, Any]=None ,    _SCREAMING_SNAKE_CASE:	Optional[int]=None ,    *_SCREAMING_SNAKE_CASE:	Dict ,    **_SCREAMING_SNAKE_CASE:	str)       -> Tuple:

				"""simple docstring"""

				super().__init__(*UpperCamelCase__ ,    **UpperCamelCase__)

				if config is None:
							assert isinstance(self.model ,    UpperCamelCase__), (
							    "If no `config` is passed the model to be trained has to be of type `PreTrainedModel`, but is"
							    F""" {self.model.__class__}"""
							)
							__lowerCAmelCase   :						List[Any]				= self.model.config
				else:
							__lowerCAmelCase   :						Union[str, Any]				= config

				__lowerCAmelCase   :						List[Any]				= data_args
				__lowerCAmelCase   :						str				= self.config.tgt_vocab_size if isinstance(self.config ,    UpperCamelCase__) else self.config.vocab_size

				if self.args.label_smoothing != 0 or (self.data_args is not None and self.data_args.ignore_pad_token_for_loss):
							assert self.config.pad_token_id is not None, (
							    "Make sure that `config.pad_token_id` is correcly defined when ignoring `pad_token` for loss"
							    " calculation or doing label smoothing."
							)

				if self.config.pad_token_id is None and self.config.eos_token_id is not None:
							logger.warning(
							    F"""The `config.pad_token_id` is `None`. Using `config.eos_token_id` = {self.config.eos_token_id} for"""
							    " padding..")

				if self.args.label_smoothing == 0:
							__lowerCAmelCase   :						int				= torch.nn.CrossEntropyLoss(ignore_index=self.config.pad_token_id)
				else:
							# dynamically import label_smoothed_nll_loss
							from utils import label_smoothed_nll_loss

							__lowerCAmelCase   :						List[str]				= label_smoothed_nll_loss

	def 							_SCREAMING_SNAKE_CASE     (  self:	Any ,    _SCREAMING_SNAKE_CASE:	int)       -> Dict:

				"""simple docstring"""

				if self.optimizer is None:
							__lowerCAmelCase   :						str				= ['''bias''', '''LayerNorm.weight''']
							__lowerCAmelCase   :						Optional[int]				= [
							    {
							        '''params''': [p for n, p in self.model.named_parameters() if not any(nd in n for nd in no_decay)],
							        '''weight_decay''': self.args.weight_decay,
							    },
							    {
							        '''params''': [p for n, p in self.model.named_parameters() if any(nd in n for nd in no_decay)],
							        '''weight_decay''': 0.0,
							    },
							]
							__lowerCAmelCase   :						int				= Adafactor if self.args.adafactor else AdamW
							if self.args.adafactor:
										__lowerCAmelCase   :						str				= Adafactor
										__lowerCAmelCase   :						Optional[Any]				= {'''scale_parameter''': False, '''relative_step''': False}
							else:
										__lowerCAmelCase   :						Optional[int]				= AdamW
										__lowerCAmelCase   :						Any				= {
										    '''betas''': (self.args.adam_betaa, self.args.adam_betaa),
										    '''eps''': self.args.adam_epsilon,
										}
							__lowerCAmelCase   :						Dict				= self.args.learning_rate
							if self.sharded_ddp:
										__lowerCAmelCase   :						Any				= OSS(
										    params=UpperCamelCase__ ,    optim=UpperCamelCase__ ,    **UpperCamelCase__ ,    )
							else:
										__lowerCAmelCase   :						Any				= optimizer_cls(UpperCamelCase__ ,    **UpperCamelCase__)

				if self.lr_scheduler is None:
							__lowerCAmelCase   :						List[Any]				= self._get_lr_scheduler(UpperCamelCase__)
				else:  # ignoring --lr_scheduler
							logger.warning("scheduler is passed to `Seq2SeqTrainer`, `--lr_scheduler` arg is ignored.")

	def 							_SCREAMING_SNAKE_CASE     (  self:	Union[str, Any] ,    _SCREAMING_SNAKE_CASE:	List[Any])       -> List[Any]:

				"""simple docstring"""

				__lowerCAmelCase   :						Union[str, Any]				= arg_to_scheduler[self.args.lr_scheduler]
				if self.args.lr_scheduler == "constant":
							__lowerCAmelCase   :						List[str]				= schedule_func(self.optimizer)
				elif self.args.lr_scheduler == "constant_w_warmup":
							__lowerCAmelCase   :						Optional[Any]				= schedule_func(self.optimizer ,    num_warmup_steps=self.args.warmup_steps)
				else:
							__lowerCAmelCase   :						str				= schedule_func(
							    self.optimizer ,    num_warmup_steps=self.args.warmup_steps ,    num_training_steps=UpperCamelCase__)
				return scheduler

	def 							_SCREAMING_SNAKE_CASE     (  self:	Any)       -> List[Any]:

				"""simple docstring"""

				if isinstance(self.train_dataset ,    torch.utils.data.IterableDataset):
							return None
				elif is_torch_tpu_available():
							return get_tpu_sampler(self.train_dataset)
				else:
							if self.args.sortish_sampler:
										self.train_dataset.make_sortish_sampler(
										    self.args.per_device_train_batch_size ,    distributed=(self.args.parallel_mode == ParallelMode.DISTRIBUTED) ,    )

							return (
							    RandomSampler(self.train_dataset)
							    if self.args.local_rank == -1
							    else DistributedSampler(self.train_dataset)
							)

	def 							_SCREAMING_SNAKE_CASE     (  self:	Union[str, Any] ,    _SCREAMING_SNAKE_CASE:	Tuple ,    _SCREAMING_SNAKE_CASE:	Union[str, Any] ,    _SCREAMING_SNAKE_CASE:	List[str])       -> Any:

				"""simple docstring"""

				if self.args.label_smoothing == 0:
							if self.data_args is not None and self.data_args.ignore_pad_token_for_loss:
										# force training to ignore pad token
										__lowerCAmelCase   :						List[str]				= model(**UpperCamelCase__ ,    use_cache=UpperCamelCase__)[0]
										__lowerCAmelCase   :						List[str]				= self.loss_fn(logits.view(-1 ,    logits.shape[-1]) ,    labels.view(-1))
							else:
										# compute usual loss via models
										__lowerCAmelCase   :						Union[str, Any]				= model(**UpperCamelCase__ ,    labels=UpperCamelCase__ ,    use_cache=UpperCamelCase__)[:2]
				else:
							# compute label smoothed loss
							__lowerCAmelCase   :						List[str]				= model(**UpperCamelCase__ ,    use_cache=UpperCamelCase__)[0]
							__lowerCAmelCase   :						int				= torch.nn.functional.log_softmax(UpperCamelCase__ ,    dim=-1)
							__lowerCAmelCase   :						int				= self.loss_fn(UpperCamelCase__ ,    UpperCamelCase__ ,    self.args.label_smoothing ,    ignore_index=self.config.pad_token_id)
				return loss, logits

	def 							_SCREAMING_SNAKE_CASE     (  self:	str ,    _SCREAMING_SNAKE_CASE:	Dict ,    _SCREAMING_SNAKE_CASE:	Union[str, Any])       -> List[Any]:

				"""simple docstring"""

				__lowerCAmelCase   :						List[str]				= inputs.pop("labels")
				__lowerCAmelCase   :						List[Any]				= self._compute_loss(UpperCamelCase__ ,    UpperCamelCase__ ,    UpperCamelCase__)
				return loss

	def 							_SCREAMING_SNAKE_CASE     (  self:	str ,    _SCREAMING_SNAKE_CASE:	nn.Module ,    _SCREAMING_SNAKE_CASE:	Dict[str, Union[torch.Tensor, Any]] ,    _SCREAMING_SNAKE_CASE:	bool ,    _SCREAMING_SNAKE_CASE:	Optional[List[str]] = None ,    )       -> Dict:

				"""simple docstring"""

				__lowerCAmelCase   :						Union[str, Any]				= self._prepare_inputs(UpperCamelCase__)

				__lowerCAmelCase   :						Dict				= {
				    '''max_length''': self.data_args.val_max_target_length
				    if self.data_args is not None
				    else self.config.max_length,
				    '''num_beams''': self.data_args.eval_beams if self.data_args is not None else self.config.num_beams,
				}

				if self.args.predict_with_generate and not self.args.prediction_loss_only:
							__lowerCAmelCase   :						Optional[Any]				= self.model.generate(
							    inputs["input_ids"] ,    attention_mask=inputs["attention_mask"] ,    **UpperCamelCase__ ,    )
							# in case the batch is shorter than max length, the output should be padded
							if generated_tokens.shape[-1] < gen_kwargs["max_length"]:
										__lowerCAmelCase   :						Optional[Any]				= self._pad_tensors_to_max_len(UpperCamelCase__ ,    gen_kwargs["max_length"])

				__lowerCAmelCase   :						Tuple				= inputs.pop("labels")
				with torch.no_grad():
							# compute loss on predict data
							__lowerCAmelCase   :						int				= self._compute_loss(UpperCamelCase__ ,    UpperCamelCase__ ,    UpperCamelCase__)

				__lowerCAmelCase   :						Optional[Any]				= loss.mean().detach()
				if self.args.prediction_loss_only:
							return (loss, None, None)

				__lowerCAmelCase   :						int				= generated_tokens if self.args.predict_with_generate else logits

				if labels.shape[-1] < gen_kwargs["max_length"]:
							__lowerCAmelCase   :						Dict				= self._pad_tensors_to_max_len(UpperCamelCase__ ,    gen_kwargs["max_length"])

				return (loss, logits, labels)







	def 							_SCREAMING_SNAKE_CASE     (  self:	List[str] ,    _SCREAMING_SNAKE_CASE:	Optional[int] ,    _SCREAMING_SNAKE_CASE:	Optional[int])       -> List[str]:

				"""simple docstring"""

				__lowerCAmelCase   :						Union[str, Any]				= self.config.pad_token_id if self.config.pad_token_id is not None else self.config.eos_token_id

				if pad_token_id is None:
							raise ValueError(
							    "Make sure that either `config.pad_token_id` or `config.eos_token_id` is defined if tensor has to be"
							    F""" padded to `max_length`={max_length}""")

				__lowerCAmelCase   :						List[Any]				= pad_token_id * torch.ones(
				    (tensor.shape[0], max_length) ,    dtype=tensor.dtype ,    device=tensor.device)
				__lowerCAmelCase   :						Tuple				= tensor
				return padded_tensor




"""simple docstring"""






import re

from filelock import FileLock


try:
	import nltk

	__snake_case							:     Any   =					True
except (ImportError, ModuleNotFoundError):
	__snake_case							:     Optional[int]   =					False

if NLTK_AVAILABLE:
	with FileLock('.lock') as lock:
		nltk.download('punkt', quiet=True)


def     _lowercase       (						__snake_case			)		->     str:
			re.sub("<n>"      ,""      ,__snake_case			)  # remove pegasus newline char
			assert NLTK_AVAILABLE, "nltk must be installed to separate newlines between sentences. (pip install nltk)"
			return "\n".join(nltk.sent_tokenize(__snake_case			)			)