"""simple docstring"""
import argparse
import os

import evaluate
import torch
from datasets import load_dataset
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 properly calculate the metrics on the
# validation dataset when in a distributed system, 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
#
########################################################################


SCREAMING_SNAKE_CASE__   =					16
SCREAMING_SNAKE_CASE__   =					32





def 				lowerCAmelCase__      (     _UpperCamelCase    :			Accelerator	,     _UpperCamelCase    :			int = 1_6   )   ->			Dict:





						"""simple docstring"""






						snake_case        =     AutoTokenizer.from_pretrained('bert-base-cased'   )
						snake_case        =     load_dataset('glue'	,     'mrpc'   )

						def tokenize_function(_UpperCamelCase    :			int   ):
												# max_length=None => use the model max length (it's actually the default)
												snake_case        =     tokenizer(examples['sentence1']	,     examples['sentence2']	,     truncation=_UpperCamelCase	,     max_length=_UpperCamelCase   )
												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():
												snake_case        =     datasets.map(
												    _UpperCamelCase	,     batched=_UpperCamelCase	,     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
						snake_case        =     tokenized_datasets.rename_column('label'	,     'labels'   )

						def collate_fn(_UpperCamelCase    :			Dict   ):
												# On TPU it's best to pad everything to the same length or training will be very slow.
												snake_case        =     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":
																		snake_case        =     1_6
												elif accelerator.mixed_precision != "no":
																		snake_case        =     8
												else:
																		snake_case        =     None

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

						# Instantiate dataloaders.
						snake_case        =     DataLoader(
						    tokenized_datasets['train']	,     shuffle=_UpperCamelCase	,     collate_fn=_UpperCamelCase	,     batch_size=_UpperCamelCase   )
						snake_case        =     DataLoader(
						    tokenized_datasets['validation']	,     shuffle=_UpperCamelCase	,     collate_fn=_UpperCamelCase	,     batch_size=_UpperCamelCase   )

						return train_dataloader, eval_dataloader


# For testing only
if os.environ.get("TESTING_MOCKED_DATALOADERS", None) == "1":
					from accelerate.test_utils.training import mocked_dataloaders

					SCREAMING_SNAKE_CASE__   =					mocked_dataloaders  # noqa: F811





def 				lowerCAmelCase__      (     _UpperCamelCase    :			Any	,     _UpperCamelCase    :			str   )   ->			Tuple:





						"""simple docstring"""






						if os.environ.get('TESTING_MOCKED_DATALOADERS'	,     _UpperCamelCase   ) == "1":
												snake_case        =     2
						# Initialize accelerator
						snake_case        =     Accelerator(cpu=args.cpu	,     mixed_precision=args.mixed_precision   )
						# Sample hyper-parameters for learning rate, batch size, seed and a few other HPs
						snake_case        =     config['lr']
						snake_case        =     int(config['num_epochs']   )
						snake_case        =     int(config['seed']   )
						snake_case        =     int(config['batch_size']   )

						snake_case        =     evaluate.load('glue'	,     'mrpc'   )

						# If the batch size is too big we use gradient accumulation
						snake_case        =     1
						if batch_size > MAX_GPU_BATCH_SIZE and accelerator.distributed_type != DistributedType.TPU:
												snake_case        =     batch_size // MAX_GPU_BATCH_SIZE
												snake_case        =     MAX_GPU_BATCH_SIZE

						set_seed(_UpperCamelCase   )
						snake_case   ,snake_case        =     get_dataloaders(_UpperCamelCase	,     _UpperCamelCase   )
						# Instantiate the model (we build the model here so that the seed also control new weights initialization)
						snake_case        =     AutoModelForSequenceClassification.from_pretrained('bert-base-cased'	,     return_dict=_UpperCamelCase   )

						# 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).
						snake_case        =     model.to(accelerator.device   )

						# Instantiate optimizer
						snake_case        =     AdamW(params=model.parameters()	,     lr=_UpperCamelCase   )

						# Instantiate scheduler
						snake_case        =     get_linear_schedule_with_warmup(
						    optimizer=_UpperCamelCase	,     num_warmup_steps=1_0_0	,     num_training_steps=(len(_UpperCamelCase   ) * 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.
						snake_case   ,snake_case   ,snake_case   ,snake_case   ,snake_case        =     accelerator.prepare(
						    _UpperCamelCase	,     _UpperCamelCase	,     _UpperCamelCase	,     _UpperCamelCase	,     _UpperCamelCase   )

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

												model.eval()
												snake_case        =     0
												for step, batch in enumerate(_UpperCamelCase   ):
																		# We could avoid this line since we set the accelerator with `device_placement=True`.
																		batch.to(accelerator.device   )
																		with torch.no_grad():
																								snake_case        =     model(**_UpperCamelCase   )
																		snake_case        =     outputs.logits.argmax(dim=-1   )
																		snake_case   ,snake_case        =     accelerator.gather((predictions, batch['labels'])   )
																		# New Code #
																		# First we check if it's a distributed system
																		if accelerator.use_distributed:
																								# Then see if we're on the last batch of our eval dataloader
																								if step == len(_UpperCamelCase   ) - 1:
																														# Last batch needs to be truncated on distributed systems as it contains additional samples
																														snake_case        =     predictions[: len(eval_dataloader.dataset   ) - samples_seen]
																														snake_case        =     references[: len(eval_dataloader.dataset   ) - samples_seen]
																								else:
																														# Otherwise we add the number of samples seen
																														samples_seen += references.shape[0]
            # All of this can be avoided if you use `Accelerator.gather_for_metrics` instead of `Accelerator.gather`:
            # accelerator.gather_for_metrics((predictions, batch["labels"]))
																		metric.add_batch(
																		    predictions=_UpperCamelCase	,     references=_UpperCamelCase	,     )

												snake_case        =     metric.compute()
												# Use accelerator.print to print only on the main process.
												accelerator.print(f"""epoch {epoch}:"""	,     _UpperCamelCase   )





def 				lowerCAmelCase__      (     )   ->			str:





						"""simple docstring"""






						snake_case        =     argparse.ArgumentParser(description='Simple example of training script.'   )
						parser.add_argument(
						    '--mixed_precision'	,     type=_UpperCamelCase	,     default=_UpperCamelCase	,     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.'   )
						snake_case        =     parser.parse_args()
						snake_case        =     {'lr': 2e-5, 'num_epochs': 3, 'seed': 4_2, 'batch_size': 1_6}
						training_function(_UpperCamelCase	,     _UpperCamelCase   )


if __name__ == "__main__":
					main()



"""simple docstring"""
import os
import posixpath
import uuid
from dataclasses import dataclass
from typing import TYPE_CHECKING, Iterable, List, Optional, Tuple, Union

import numpy as np
import pyarrow as pa

import datasets
from datasets.arrow_writer import ArrowWriter, ParquetWriter
from datasets.config import MAX_SHARD_SIZE
from datasets.filesystems import (
    is_remote_filesystem,
    rename,
)
from datasets.iterable_dataset import _BaseExamplesIterable
from datasets.utils.py_utils import convert_file_size_to_int


SCREAMING_SNAKE_CASE__   =					datasets.utils.logging.get_logger(__name__)

if TYPE_CHECKING:
					import pyspark



@dataclass
class 					lowerCAmelCase_      (     datasets.BuilderConfig   ):



				"""simple docstring"""
				_lowerCAmelCase       :      Optional[datasets.Features]     					=  None





def 				lowerCAmelCase__      (     _UpperCamelCase    :			"pyspark.sql.DataFrame"	,     _UpperCamelCase    :			List[int]	,     )   ->			Dict:





						"""simple docstring"""






						import pyspark

						def generate_fn():
												snake_case        =     df.select('*'	,     pyspark.sql.functions.spark_partition_id().alias('part_id'   )   )
												for partition_id in partition_order:
																		snake_case        =     df_with_partition_id.select('*'   ).where(f"""part_id = {partition_id}"""   ).drop('part_id'   )
																		snake_case        =     partition_df.collect()
																		snake_case        =     0
																		for row in rows:
																								yield f"""{partition_id}_{row_id}""", row.asDict()
																								row_id += 1

						return generate_fn



class 					lowerCAmelCase_      (     _BaseExamplesIterable   ):



				"""simple docstring"""

				def __init__(			self						,      lowerCAmelCase						,      lowerCAmelCase=None						,      ):






										"""simple docstring"""

										snake_case        =     df
										snake_case        =     partition_order or range(self.df.rdd.getNumPartitions()      )
										snake_case        =     _generate_iterable_examples(self.df						,      self.partition_order      )

				def __iter__(			self      ):






										"""simple docstring"""

										yield from self.generate_examples_fn()

				def 						snake_case	(			self						,      lowerCAmelCase      ):






										"""simple docstring"""

										snake_case        =     list(range(self.df.rdd.getNumPartitions()      )      )
										generator.shuffle(lowerCAmelCase      )
										return SparkExamplesIterable(self.df						,      partition_order=lowerCAmelCase      )

				def 						snake_case	(			self						,      lowerCAmelCase						,      lowerCAmelCase      ):






										"""simple docstring"""

										snake_case        =     self.split_shard_indices_by_worker(lowerCAmelCase						,      lowerCAmelCase      )
										return SparkExamplesIterable(self.df						,      partition_order=lowerCAmelCase      )

				@property
				def 						snake_case	(			self      ):






										"""simple docstring"""

										return len(self.partition_order      )





class 					lowerCAmelCase_      (     datasets.DatasetBuilder   ):



				"""simple docstring"""
				_lowerCAmelCase       :      List[str]     					=  SparkConfig

				def __init__(			self						,      lowerCAmelCase						,      lowerCAmelCase = None						,      lowerCAmelCase = None						,      **lowerCAmelCase						,      ):






										"""simple docstring"""

										import pyspark

										snake_case        =     pyspark.sql.SparkSession.builder.getOrCreate()
										snake_case        =     df
										snake_case        =     working_dir

										super().__init__(
										    cache_dir=lowerCAmelCase						,      config_name=str(self.df.semanticHash()      )						,      **lowerCAmelCase						,      )

				def 						snake_case	(			self      ):






										"""simple docstring"""

										def create_cache_and_write_probe(lowerCAmelCase      ):
																# makedirs with exist_ok will recursively create the directory. It will not throw an error if directories
																# already exist.
																os.makedirs(self._cache_dir						,      exist_ok=lowerCAmelCase      )
																snake_case        =     os.path.join(self._cache_dir						,      'fs_test' + uuid.uuida().hex      )
																# Opening the file in append mode will create a new file unless it already exists, in which case it will not
																# change the file contents.
																open(lowerCAmelCase						,      'a'      )
																return [probe_file]

										if self._spark.conf.get('spark.master'						,      ''      ).startswith('local'      ):
																return

										# If the cluster is multi-node, make sure that the user provided a cache_dir and that it is on an NFS
										# accessible to the driver.
										# TODO: Stream batches to the driver using ArrowCollectSerializer instead of throwing an error.
										if self._cache_dir:
																snake_case        =     (
																    self._spark.sparkContext.parallelize(range(1      )						,      1      ).mapPartitions(lowerCAmelCase      ).collect()
																)
																if os.path.isfile(probe[0]      ):
																						return

										raise ValueError(
										    'When using Dataset.from_spark on a multi-node cluster, the driver and all workers should be able to access cache_dir'      )

				def 						snake_case	(			self      ):






										"""simple docstring"""

										return datasets.DatasetInfo(features=self.config.features      )

				def 						snake_case	(			self						,      lowerCAmelCase      ):






										"""simple docstring"""

										return [datasets.SplitGenerator(name=datasets.Split.TRAIN      )]

				def 						snake_case	(			self						,      lowerCAmelCase      ):






										"""simple docstring"""

										import pyspark

										def get_arrow_batch_size(lowerCAmelCase      ):
																for batch in it:
																						yield pa.RecordBatch.from_pydict({'batch_bytes': [batch.nbytes]}      )

										snake_case        =     self.df.count()
										snake_case        =     df_num_rows if df_num_rows <= 1_00 else 1_00
										# Approximate the size of each row (in Arrow format) by averaging over a max-100-row sample.
										snake_case        =     (
										    self.df.limit(lowerCAmelCase      )
										    .repartition(1      )
										    .mapInArrow(lowerCAmelCase						,      'batch_bytes: long'      )
										    .agg(pyspark.sql.functions.sum('batch_bytes'      ).alias('sample_bytes'      )      )
										    .collect()[0]
										    .sample_bytes
										    / sample_num_rows
										)
										snake_case        =     approx_bytes_per_row * df_num_rows
										if approx_total_size > max_shard_size:
																# Make sure there is at least one row per partition.
																snake_case        =     min(lowerCAmelCase						,      int(approx_total_size / max_shard_size      )      )
																snake_case        =     self.df.repartition(lowerCAmelCase      )

				def 						snake_case	(			self						,      lowerCAmelCase						,      lowerCAmelCase						,      lowerCAmelCase						,      ):






										"""simple docstring"""

										import pyspark

										snake_case        =     ParquetWriter if file_format == 'parquet' else ArrowWriter
										snake_case        =     os.path.join(self._working_dir						,      os.path.basename(lowerCAmelCase      )      ) if self._working_dir else fpath
										snake_case        =     file_format == 'parquet'

										# Define these so that we don't reference self in write_arrow, which will result in a pickling error due to
										# pickling the SparkContext.
										snake_case        =     self.config.features
										snake_case        =     self._writer_batch_size
										snake_case        =     self._fs.storage_options

										def write_arrow(lowerCAmelCase      ):
																# Within the same SparkContext, no two task attempts will share the same attempt ID.
																snake_case        =     pyspark.TaskContext().taskAttemptId()
																snake_case        =     next(lowerCAmelCase						,      lowerCAmelCase      )
																if first_batch is None:
																						# Some partitions might not receive any data.
																						return pa.RecordBatch.from_arrays(
																						    [[task_id], [0], [0]]						,      names=['task_id', 'num_examples', 'num_bytes']						,      )
																snake_case        =     0
																snake_case        =     writer_class(
																    features=lowerCAmelCase						,      path=working_fpath.replace('SSSSS'						,      F"""{shard_id:05d}"""      ).replace('TTTTT'						,      F"""{task_id:05d}"""      )						,      writer_batch_size=lowerCAmelCase						,      storage_options=lowerCAmelCase						,      embed_local_files=lowerCAmelCase						,      )
																snake_case        =     pa.Table.from_batches([first_batch]      )
																writer.write_table(lowerCAmelCase      )
																for batch in it:
																						if max_shard_size is not None and writer._num_bytes >= max_shard_size:
																												snake_case   ,snake_case        =     writer.finalize()
																												writer.close()
																												yield pa.RecordBatch.from_arrays(
																												    [[task_id], [num_examples], [num_bytes]]						,      names=['task_id', 'num_examples', 'num_bytes']						,      )
																												shard_id += 1
																												snake_case        =     writer_class(
																												    features=writer._features						,      path=working_fpath.replace('SSSSS'						,      F"""{shard_id:05d}"""      ).replace('TTTTT'						,      F"""{task_id:05d}"""      )						,      writer_batch_size=lowerCAmelCase						,      storage_options=lowerCAmelCase						,      embed_local_files=lowerCAmelCase						,      )
																						snake_case        =     pa.Table.from_batches([batch]      )
																						writer.write_table(lowerCAmelCase      )

																if writer._num_bytes > 0:
																						snake_case   ,snake_case        =     writer.finalize()
																						writer.close()
																						yield pa.RecordBatch.from_arrays(
																						    [[task_id], [num_examples], [num_bytes]]						,      names=['task_id', 'num_examples', 'num_bytes']						,      )

																if working_fpath != fpath:
																						for file in os.listdir(os.path.dirname(lowerCAmelCase      )      ):
																												snake_case        =     os.path.join(os.path.dirname(lowerCAmelCase      )						,      os.path.basename(lowerCAmelCase      )      )
																												shutil.move(lowerCAmelCase						,      lowerCAmelCase      )

										snake_case        =     (
										    self.df.mapInArrow(lowerCAmelCase						,      'task_id: long, num_examples: long, num_bytes: long'      )
										    .groupBy('task_id'      )
										    .agg(
										        pyspark.sql.functions.sum('num_examples'      ).alias('total_num_examples'      )						,      pyspark.sql.functions.sum('num_bytes'      ).alias('total_num_bytes'      )						,      pyspark.sql.functions.count('num_bytes'      ).alias('num_shards'      )						,      pyspark.sql.functions.collect_list('num_examples'      ).alias('shard_lengths'      )						,      )
										    .collect()
										)
										for row in stats:
																yield row.task_id, (row.total_num_examples, row.total_num_bytes, row.num_shards, row.shard_lengths)

				def 						snake_case	(			self						,      lowerCAmelCase						,      lowerCAmelCase = "arrow"						,      lowerCAmelCase = None						,      lowerCAmelCase = None						,      **lowerCAmelCase						,      ):






										"""simple docstring"""

										self._validate_cache_dir()

										snake_case        =     convert_file_size_to_int(max_shard_size or MAX_SHARD_SIZE      )
										self._repartition_df_if_needed(lowerCAmelCase      )
										snake_case        =     not is_remote_filesystem(self._fs      )
										snake_case        =     os.path.join if is_local else posixpath.join

										snake_case        =     '-TTTTT-SSSSS-of-NNNNN'
										snake_case        =     F"""{self.name}-{split_generator.name}{SUFFIX}.{file_format}"""
										snake_case        =     path_join(self._output_dir						,      lowerCAmelCase      )

										snake_case        =     0
										snake_case        =     0
										snake_case        =     0
										snake_case        =     []
										snake_case        =     []

										for task_id, content in self._prepare_split_single(lowerCAmelCase						,      lowerCAmelCase						,      lowerCAmelCase      ):
																(
																    (
																    snake_case
																)   ,(
																    snake_case
																)   ,(
																    snake_case
																)   ,(
																    snake_case
																)   ,
																)        =     content
																if num_bytes > 0:
																						total_num_examples += num_examples
																						total_num_bytes += num_bytes
																						total_shards += num_shards
																						task_id_and_num_shards.append((task_id, num_shards)      )
																						all_shard_lengths.extend(lowerCAmelCase      )

										snake_case        =     total_num_examples
										snake_case        =     total_num_bytes

										# should rename everything at the end
										logger.debug(F"""Renaming {total_shards} shards."""      )
										if total_shards > 1:
																snake_case        =     all_shard_lengths

																# Define fs outside of _rename_shard so that we don't reference self in the function, which will result in a
																# pickling error due to pickling the SparkContext.
																snake_case        =     self._fs

																# use the -SSSSS-of-NNNNN pattern
																def _rename_shard(
																    lowerCAmelCase						,      lowerCAmelCase						,      lowerCAmelCase						,      ):
																						rename(
																						    lowerCAmelCase						,      fpath.replace('SSSSS'						,      F"""{shard_id:05d}"""      ).replace('TTTTT'						,      F"""{task_id:05d}"""      )						,      fpath.replace('TTTTT-SSSSS'						,      F"""{global_shard_id:05d}"""      ).replace('NNNNN'						,      F"""{total_shards:05d}"""      )						,      )

																snake_case        =     []
																snake_case        =     0
																for i in range(len(lowerCAmelCase      )      ):
																						snake_case   ,snake_case        =     task_id_and_num_shards[i]
																						for shard_id in range(lowerCAmelCase      ):
																												args.append([task_id, shard_id, global_shard_id]      )
																												global_shard_id += 1
																self._spark.sparkContext.parallelize(lowerCAmelCase						,      len(lowerCAmelCase      )      ).map(lambda lowerCAmelCase      : _rename_shard(*lowerCAmelCase      )      ).collect()
										else:
																# don't use any pattern
																snake_case        =     0
																snake_case        =     task_id_and_num_shards[0][0]
																self._rename(
																    fpath.replace('SSSSS'						,      F"""{shard_id:05d}"""      ).replace('TTTTT'						,      F"""{task_id:05d}"""      )						,      fpath.replace(lowerCAmelCase						,      ''      )						,      )

				def 						snake_case	(			self						,      lowerCAmelCase						,      ):






										"""simple docstring"""

										return SparkExamplesIterable(self.df      )


