





"""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		:				Dict  			=    4
a		:				List[str]  			=    3


class  __UpperCamelCase       (		a__		):
       pass






def    _SCREAMING_SNAKE_CASE	(			_lowercase		:					List[str]      )				->Optional[int]:






 '''simple docstring'''






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






def    _SCREAMING_SNAKE_CASE	(			)				->Dict:






 '''simple docstring'''






 a   :	str			=       int(os.environ["RANK"]      )
 a   :	List[str]			=       int(os.environ["WORLD_SIZE"]      )

 a   :	Optional[Any]			=       ArgumentParser()
 parser.add_argument("--streaming"					, type=_lowerCAmelCase      )
 parser.add_argument("--local_rank"					, type=_lowerCAmelCase      )
 parser.add_argument("--num_workers"					, type=_lowerCAmelCase					, default=0      )
 a   :	Optional[int]			=       parser.parse_args()
 a   :	Tuple			=       args.streaming
 a   :	Any			=       args.num_workers

 a   :	Tuple			=       {"shards": [F"""shard_{shard_idx}""" for shard_idx in range(_lowerCAmelCase      )]}
 a   :	int			=       IterableDataset.from_generator(_lowerCAmelCase					, gen_kwargs=_lowerCAmelCase      )
 if not streaming:
  a   :	List[str]			=       Dataset.from_list(list(_lowerCAmelCase      )      )

 a   :	Optional[Any]			=       split_dataset_by_node(_lowerCAmelCase					, rank=_lowerCAmelCase					, world_size=_lowerCAmelCase      )
 a   :	List[str]			=       torch.utils.data.DataLoader(_lowerCAmelCase					, num_workers=_lowerCAmelCase      )

 a   :	Union[str, Any]			=       NUM_SHARDS * NUM_ITEMS_PER_SHARD
 a   :	Optional[int]			=       full_size // world_size
 expected_local_size += int(rank < (full_size % world_size)      )

 a   :	Union[str, Any]			=       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"""




a		:				str  			=    8.314_4598






def    _SCREAMING_SNAKE_CASE	(			_lowercase		:					float					, _lowercase		:					float      )				->float:






	'''simple docstring'''






	if temperature < 0:
		raise Exception("Temperature cannot be less than 0 K"      )
	if molar_mass <= 0:
		raise Exception("Molar mass cannot be less than or equal to 0 kg/mol"      )
	else:
		return (3 * UNIVERSAL_GAS_CONSTANT * temperature / molar_mass) ** 0.5


if __name__ == "__main__":
		import doctest

		# run doctest
		doctest.testmod()

		# example
		a		:				Any  			=    300
		a		:				Dict  			=    28
		a		:				Dict  			=    rms_speed_of_molecule(temperature, molar_mass)
		print(F'''Vrms of Nitrogen gas at 300 K is {vrms} m/s''')


