


"""simple docstring"""







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__				:							Any						=     4
a__				:							Dict						=     3




class  UpperCamelCase_	( UpperCamelCase):

	"""simple docstring"""





	pass




def    UpperCAmelCase__       (lowerCAmelCase_   ):




					'''simple docstring'''


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




def    UpperCAmelCase__       ():




					'''simple docstring'''


					__SCREAMING_SNAKE_CASE						   =				int(os.environ["RANK"]   )
					__SCREAMING_SNAKE_CASE						   =				int(os.environ["WORLD_SIZE"]   )

					__SCREAMING_SNAKE_CASE						   =				ArgumentParser()
					parser.add_argument("--streaming"  ,						type=lowerCAmelCase_   )
					parser.add_argument("--local_rank"  ,						type=lowerCAmelCase_   )
					parser.add_argument("--num_workers"  ,						type=lowerCAmelCase_  ,						default=0   )
					__SCREAMING_SNAKE_CASE						   =				parser.parse_args()
					__SCREAMING_SNAKE_CASE						   =				args.streaming
					__SCREAMING_SNAKE_CASE						   =				args.num_workers

					__SCREAMING_SNAKE_CASE						   =				{"shards": [f"""shard_{shard_idx}""" for shard_idx in range(lowerCAmelCase_   )]}
					__SCREAMING_SNAKE_CASE						   =				IterableDataset.from_generator(lowerCAmelCase_  ,						gen_kwargs=lowerCAmelCase_   )
					if not streaming:
										__SCREAMING_SNAKE_CASE						   =				Dataset.from_list(list(lowerCAmelCase_   )   )

					__SCREAMING_SNAKE_CASE						   =				split_dataset_by_node(lowerCAmelCase_  ,						rank=lowerCAmelCase_  ,						world_size=lowerCAmelCase_   )
					__SCREAMING_SNAKE_CASE						   =				torch.utils.data.DataLoader(lowerCAmelCase_  ,						num_workers=lowerCAmelCase_   )

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

					__SCREAMING_SNAKE_CASE						   =				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()




"""simple docstring"""






import os
import sys
from contextlib import contextmanager


# Windows only
if os.name == "nt":
							import ctypes
							import msvcrt  # noqa





							class      lowerCamelCase__   (     ctypes.Structure				):







												"""simple docstring"""


												__a	       =							[("""size""", ctypes.c_int), ("""visible""", ctypes.c_byte)]
def      lowerCamelCase       (     )		->       Optional[int]:

							'''simple docstring'''



							if os.name == "nt":
														__UpperCAmelCase   :						Dict      							=					CursorInfo()
														__UpperCAmelCase   :						Any      							=					ctypes.windll.kernelaa.GetStdHandle(-1_1							)
														ctypes.windll.kernelaa.GetConsoleCursorInfo(_UpperCamelCase       ,			ctypes.byref(_UpperCamelCase							)							)
														__UpperCAmelCase   :						Tuple      							=					False
														ctypes.windll.kernelaa.SetConsoleCursorInfo(_UpperCamelCase       ,			ctypes.byref(_UpperCamelCase							)							)
							elif os.name == "posix":
														sys.stdout.write("""\033[?25l"""							)
														sys.stdout.flush()
def      lowerCamelCase       (     )		->       Optional[int]:

							'''simple docstring'''



							if os.name == "nt":
														__UpperCAmelCase   :						str      							=					CursorInfo()
														__UpperCAmelCase   :						int      							=					ctypes.windll.kernelaa.GetStdHandle(-1_1							)
														ctypes.windll.kernelaa.GetConsoleCursorInfo(_UpperCamelCase       ,			ctypes.byref(_UpperCamelCase							)							)
														__UpperCAmelCase   :						Union[str, Any]      							=					True
														ctypes.windll.kernelaa.SetConsoleCursorInfo(_UpperCamelCase       ,			ctypes.byref(_UpperCamelCase							)							)
							elif os.name == "posix":
														sys.stdout.write("""\033[?25h"""							)
														sys.stdout.flush()
@contextmanager
def      lowerCamelCase       (     )		->       str:

							'''simple docstring'''



							try:
														hide_cursor()
														yield
							finally:
														show_cursor()
