
'''simple docstring'''







from __future__ import annotations





def 					UpperCAmelCase_		(__a      :    list ):






   """simple docstring"""

   if len(__a ) == 0:
      return []
   _a,  _a				:	Any			=   min(__a ), max(__a )
   _a				:	Optional[Any]			=   int(max_value - min_value ) + 1
   _a				:	list[list]			=   [[] for _ in range(__a )]

   for i in my_list:
      buckets[int(i - min_value )].append(__a )

   return [v for bucket in buckets for v in sorted(__a )]


if __name__ == "__main__":
  from doctest import testmod

  testmod()
  assert bucket_sort([4, 5, 3, 2, 1]) == [1, 2, 3, 4, 5]
  assert bucket_sort([0, 1, -1_0, 1_5, 2, -2]) == [-1_0, -2, 0, 1, 2, 1_5]





'''simple docstring'''







import argparse
from typing import List

import evaluate
import numpy as np
import torch
from datasets import DatasetDict, load_dataset

# New Code #
# We'll be using StratifiedKFold for this example
from sklearn.model_selection import StratifiedKFold
from torch.optim import AdamW
from torch.utils.data import DataLoader
from transformers import AutoModelForSequenceClassification, AutoTokenizer, get_linear_schedule_with_warmup, set_seed

from accelerate import Accelerator, DistributedType


########################################################################
# This is a fully working simple example to use Accelerate,
# specifically showcasing how to perform Cross Validation,
# and builds off the `nlp_example.py` script.
#
# This example trains a Bert base model on GLUE MRPC
# in any of the following settings (with the same script):
#   - single CPU or single GPU
#   - multi GPUS (using PyTorch distributed mode)
#   - (multi) TPUs
#   - fp16 (mixed-precision) or fp32 (normal precision)
#
# To help focus on the differences in the code, building `DataLoaders`
# was refactored into its own function.
# New additions from the base script can be found quickly by
# looking for the # New Code # tags
#
# To run it in each of these various modes, follow the instructions
# in the readme for examples:
# https://github.com/huggingface/accelerate/tree/main/examples
#
########################################################################


__lowerCAmelCase         =    1_6
__lowerCAmelCase         =    3_2





def 					UpperCAmelCase_		(__a      :    Accelerator ,	__a      :    DatasetDict ,	__a      :    List[int] ,	__a      :    List[int] ,	__a      :    int = 1_6 ):






   """simple docstring"""

   _a				:	Union[str, Any]			=   AutoTokenizer.from_pretrained('bert-base-cased' )
   _a				:	str			=   DatasetDict(
       {
           'train': dataset['train'].select(__a ),
           'validation': dataset['train'].select(__a ),
           'test': dataset['validation'],
       } )

   def tokenize_function(__a      :    List[Any] ):
      # max_length=None => use the model max length (it's actually the default)
      _a				:	Optional[int]			=   tokenizer(examples['sentence1'] ,	examples['sentence2'] ,	truncation=__a ,	max_length=__a )
      return outputs

   # Apply the method we just defined to all the examples in all the splits of the dataset
   # starting with the main process first:
   with accelerator.main_process_first():
      _a				:	List[str]			=   datasets.map(
          __a ,	batched=__a ,	remove_columns=['idx', 'sentence1', 'sentence2'] ,	)

   # We also rename the 'label' column to 'labels' which is the expected name for labels by the models of the
   # transformers library
   _a				:	List[Any]			=   tokenized_datasets.rename_column('label' ,	'labels' )

   def collate_fn(__a      :    int ):
      # On TPU it's best to pad everything to the same length or training will be very slow.
      _a				:	Dict			=   1_2_8 if accelerator.distributed_type == DistributedType.TPU else None
      # When using mixed precision we want round multiples of 8/16
      if accelerator.mixed_precision == "fp8":
         _a				:	Tuple			=   1_6
      elif accelerator.mixed_precision != "no":
         _a				:	List[Any]			=   8
      else:
         _a				:	List[Any]			=   None

      return tokenizer.pad(
          __a ,	padding='longest' ,	max_length=__a ,	pad_to_multiple_of=__a ,	return_tensors='pt' ,	)

   # Instantiate dataloaders.
   _a				:	Any			=   DataLoader(
       tokenized_datasets['train'] ,	shuffle=__a ,	collate_fn=__a ,	batch_size=__a )
   _a				:	Optional[int]			=   DataLoader(
       tokenized_datasets['validation'] ,	shuffle=__a ,	collate_fn=__a ,	batch_size=__a )

   _a				:	Optional[Any]			=   DataLoader(
       tokenized_datasets['test'] ,	shuffle=__a ,	collate_fn=__a ,	batch_size=__a )

   return train_dataloader, eval_dataloader, test_dataloader





def 					UpperCAmelCase_		(__a      :    Any ,	__a      :    Union[str, Any] ):






   """simple docstring"""

   _a				:	Dict			=   []
   # Download the dataset
   _a				:	Tuple			=   load_dataset('glue' ,	'mrpc' )
   # Create our splits
   _a				:	Union[str, Any]			=   StratifiedKFold(n_splits=int(args.num_folds ) )
   # Initialize accelerator
   _a				:	Any			=   Accelerator(cpu=args.cpu ,	mixed_precision=args.mixed_precision )
   # Sample hyper-parameters for learning rate, batch size, seed and a few other HPs
   _a				:	Optional[Any]			=   config['lr']
   _a				:	Optional[int]			=   int(config['num_epochs'] )
   _a				:	Dict			=   int(config['seed'] )
   _a				:	Dict			=   int(config['batch_size'] )

   _a				:	Optional[int]			=   evaluate.load('glue' ,	'mrpc' )

   # If the batch size is too big we use gradient accumulation
   _a				:	List[Any]			=   1
   if batch_size > MAX_GPU_BATCH_SIZE and accelerator.distributed_type != DistributedType.TPU:
      _a				:	Any			=   batch_size // MAX_GPU_BATCH_SIZE
      _a				:	List[str]			=   MAX_GPU_BATCH_SIZE

   set_seed(__a )

   # New Code #
   # Create our folds:
   _a				:	int			=   kfold.split(np.zeros(datasets['train'].num_rows ) ,	datasets['train']['label'] )
   _a				:	Any			=   []
   # Iterate over them
   for i, (train_idxs, valid_idxs) in enumerate(__a ):
      _a,  _a,  _a				:	Optional[Any]			=   get_fold_dataloaders(
          __a ,	__a ,	__a ,	__a ,	)
      # Instantiate the model (we build the model here so that the seed also control new weights initialization)
      _a				:	Dict			=   AutoModelForSequenceClassification.from_pretrained('bert-base-cased' ,	return_dict=__a )

      # We could avoid this line since the accelerator is set with `device_placement=True` (default value).
      # Note that if you are placing tensors on devices manually, this line absolutely needs to be before the optimizer
      # creation otherwise training will not work on TPU (`accelerate` will kindly throw an error to make us aware of that).
      _a				:	List[Any]			=   model.to(accelerator.device )

      # Instantiate optimizer
      _a				:	List[str]			=   AdamW(params=model.parameters() ,	lr=__a )

      # Instantiate scheduler
      _a				:	List[Any]			=   get_linear_schedule_with_warmup(
          optimizer=__a ,	num_warmup_steps=1_0_0 ,	num_training_steps=(len(__a ) * num_epochs) // gradient_accumulation_steps ,	)

      # Prepare everything
      # There is no specific order to remember, we just need to unpack the objects in the same order we gave them to the
      # prepare method.
      _a,  _a,  _a,  _a,  _a				:	Union[str, Any]			=   accelerator.prepare(
          __a ,	__a ,	__a ,	__a ,	__a )

      # Now we train the model
      for epoch in range(__a ):
         model.train()
         for step, batch in enumerate(__a ):
            # We could avoid this line since we set the accelerator with `device_placement=True`.
            batch.to(accelerator.device )
            _a				:	Dict			=   model(**__a )
            _a				:	int			=   outputs.loss
            _a				:	Any			=   loss / gradient_accumulation_steps
            accelerator.backward(__a )
            if step % gradient_accumulation_steps == 0:
               optimizer.step()
               lr_scheduler.step()
               optimizer.zero_grad()

         model.eval()
         for step, batch in enumerate(__a ):
            # We could avoid this line since we set the accelerator with `device_placement=True`.
            batch.to(accelerator.device )
            with torch.no_grad():
               _a				:	Union[str, Any]			=   model(**__a )
            _a				:	Tuple			=   outputs.logits.argmax(dim=-1 )
            _a,  _a				:	Any			=   accelerator.gather_for_metrics((predictions, batch['labels']) )
            metric.add_batch(
                predictions=__a ,	references=__a ,	)

         _a				:	List[Any]			=   metric.compute()
         # Use accelerator.print to print only on the main process.
         accelerator.print(f"""epoch {epoch}:""" ,	__a )

      # New Code #
      # We also run predictions on the test set at the very end
      _a				:	Any			=   []
      for step, batch in enumerate(__a ):
         # We could avoid this line since we set the accelerator with `device_placement=True`.
         batch.to(accelerator.device )
         with torch.no_grad():
            _a				:	Tuple			=   model(**__a )
         _a				:	Dict			=   outputs.logits
         _a,  _a				:	Optional[int]			=   accelerator.gather_for_metrics((predictions, batch['labels']) )
         fold_predictions.append(predictions.cpu() )
         if i == 0:
            # We need all of the test predictions
            test_references.append(references.cpu() )
        # Use accelerator.print to print only on the main process.
      test_predictions.append(torch.cat(__a ,	dim=0 ) )
      # We now need to release all our memory and get rid of the current model, optimizer, etc
      accelerator.free_memory()
   # New Code #
   # Finally we check the accuracy of our folded results:
   _a				:	Dict			=   torch.cat(__a ,	dim=0 )
   _a				:	Any			=   torch.stack(__a ,	dim=0 ).sum(dim=0 ).div(int(args.num_folds ) ).argmax(dim=-1 )
   _a				:	str			=   metric.compute(predictions=__a ,	references=__a )
   accelerator.print('Average test metrics from all folds:' ,	__a )





def 					UpperCAmelCase_		():






   """simple docstring"""

   _a				:	Any			=   argparse.ArgumentParser(description='Simple example of training script.' )
   parser.add_argument(
       '--mixed_precision' ,	type=__a ,	default=__a ,	choices=['no', 'fp16', 'bf16', 'fp8'] ,	help='Whether to use mixed precision. Choose'
       'between fp16 and bf16 (bfloat16). Bf16 requires PyTorch >= 1.10.'
       'and an Nvidia Ampere GPU.' ,	)
   parser.add_argument('--cpu' ,	action='store_true' ,	help='If passed, will train on the CPU.' )
   # New Code #
   parser.add_argument('--num_folds' ,	type=__a ,	default=3 ,	help='The number of splits to perform across the dataset' )
   _a				:	Any			=   parser.parse_args()
   _a				:	int			=   {'lr': 2e-5, 'num_epochs': 3, 'seed': 4_2, 'batch_size': 1_6}
   training_function(__a ,	__a )


if __name__ == "__main__":
  main()



