





import os
from argparse import ArgumentParser
from typing import List

import torch.utils.data

from datasets import Dataset, IterableDataset
from datasets.distributed import split_dataset_by_node


_a 						=      4
_a 						=      3






class 					__A    (    lowerCAmelCase ):

			'''simple docstring'''







			pass





def lowerCAmelCase__(__snake_case							)				->      List[Any]:







	'''simple docstring'''







	for shard in shards:
		for i in range(__snake_case							):
			yield {"i": i, "shard": shard}





def lowerCAmelCase__()				->      List[str]:







	'''simple docstring'''







	lowerCamelCase__								=		int(os.environ['''RANK''']							)
	lowerCamelCase__								=		int(os.environ['''WORLD_SIZE''']							)

	lowerCamelCase__								=		ArgumentParser()
	parser.add_argument('''--streaming'''       ,type=__snake_case							)
	parser.add_argument('''--local_rank'''       ,type=__snake_case							)
	parser.add_argument('''--num_workers'''       ,type=__snake_case       ,default=0							)
	lowerCamelCase__								=		parser.parse_args()
	lowerCamelCase__								=		args.streaming
	lowerCamelCase__								=		args.num_workers

	lowerCamelCase__								=		{'''shards''': [F'shard_{shard_idx}' for shard_idx in range(__snake_case							)]}
	lowerCamelCase__								=		IterableDataset.from_generator(__snake_case       ,gen_kwargs=__snake_case							)
	if not streaming:
		lowerCamelCase__								=		Dataset.from_list(list(__snake_case							)							)

	lowerCamelCase__								=		split_dataset_by_node(__snake_case       ,rank=__snake_case       ,world_size=__snake_case							)
	lowerCamelCase__								=		torch.utils.data.DataLoader(__snake_case       ,num_workers=__snake_case							)

	lowerCamelCase__								=		NUM_SHARDS * NUM_ITEMS_PER_SHARD
	lowerCamelCase__								=		full_size // world_size
	expected_local_size += int(rank < (full_size % world_size)							)

	lowerCamelCase__								=		sum(1 for _ in dataloader							)
	if local_size != expected_local_size:
		raise FailedTestError(F'local_size {local_size} != expected_local_size {expected_local_size}'							)


if __name__ == "__main__":
			main()










def lowerCAmelCase__(__snake_case							)				->      str:







	'''simple docstring'''







	return "".join(chr(ord(__snake_case							) - 32							) if '''a''' <= char <= '''z''' else char for char in word							)


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

			testmod()



