






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


__lowerCamelCase	:		Tuple										=   4
__lowerCamelCase	:		List[str]										=   3







class  _lowercase   (   _A						):
      pass







def 			__lowercase							(      _a  :					List[str]	):





 '''simple docstring'''







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







def 			__lowercase							(      ):





 '''simple docstring'''







 snake_case__  :    int							       =int(os.environ["""RANK"""]	)
 snake_case__  :    Any							       =int(os.environ["""WORLD_SIZE"""]	)

 snake_case__  :    Tuple							       =ArgumentParser()
 parser.add_argument("""--streaming"""		,  type=_a	)
 parser.add_argument("""--local_rank"""		,  type=_a	)
 parser.add_argument("""--num_workers"""		,  type=_a		,  default=0	)
 snake_case__  :    int							       =parser.parse_args()
 snake_case__  :    List[str]							       =args.streaming
 snake_case__  :    List[Any]							       =args.num_workers

 snake_case__  :    List[Any]							       ={"""shards""": [f"shard_{shard_idx}" for shard_idx in range(_a	)]}
 snake_case__  :    str							       =IterableDataset.from_generator(_a		,  gen_kwargs=_a	)
 if not streaming:
  snake_case__  :    Tuple							       =Dataset.from_list(list(_a	)	)

 snake_case__  :    Union[str, Any]							       =split_dataset_by_node(_a		,  rank=_a		,  world_size=_a	)
 snake_case__  :    str							       =torch.utils.data.DataLoader(_a		,  num_workers=_a	)

 snake_case__  :    Tuple							       =NUM_SHARDS * NUM_ITEMS_PER_SHARD
 snake_case__  :    List[Any]							       =full_size // world_size
 expected_local_size += int(rank < (full_size % world_size)	)

 snake_case__  :    Optional[int]							       =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 			A__							(      _a  :					Any		,  _a  :					Optional[Any]		,  _a  :					int		,  _a  :					Any	):





 '''simple docstring'''







 if height >= 1:
  move_tower(height - 1		,  _a		,  _a		,  _a	)
  move_disk(_a		,  _a	)
  move_tower(height - 1		,  _a		,  _a		,  _a	)







def 			A__							(      _a  :					Optional[int]		,  _a  :					str	):





 '''simple docstring'''







 print("""moving disk from"""		,  _a		,  """to"""		,  _a	)







def 			A__							(      ):





 '''simple docstring'''







 snake_case__  :    Dict							       =int(input("""Height of hanoi: """	).strip()	)
 move_tower(_a		,  """A"""		,  """B"""		,  """C"""	)


if __name__ == "__main__":
       main()





