





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							)       ->   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()







# This is the module that test_patching.py uses to test patch_submodule()

import os  # noqa: this is just for tests
import os as renamed_os  # noqa: this is just for tests
from os import path  # noqa: this is just for tests
from os import path as renamed_path  # noqa: this is just for tests
from os.path import join  # noqa: this is just for tests
from os.path import join as renamed_join  # noqa: this is just for tests


_a						=   open  # noqa: we just need to have a builtin inside this module to test it properly



