




"""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


lowerCAmelCase							:    List[str]  							=							4
lowerCAmelCase							:    List[str]  							=							3






class 					__magic_name__							( UpperCAmelCase__       ):






				'''simple docstring'''
				pass




def 					a__				(       snake_case__       )		->      Dict:
			for shard in shards:
						for i in range(snake_case__       ):
									yield {"i": i, "shard": shard}



def 					a__				(       )		->      List[Any]:
			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()









"""simple docstring"""




from typing import List, Optional, TypeVar

from .arrow_dataset import Dataset, _concatenate_map_style_datasets, _interleave_map_style_datasets
from .dataset_dict import DatasetDict, IterableDatasetDict
from .info import DatasetInfo
from .iterable_dataset import IterableDataset, _concatenate_iterable_datasets, _interleave_iterable_datasets
from .splits import NamedSplit
from .utils import logging
from .utils.py_utils import Literal


lowerCAmelCase							:    List[Any]  							=							logging.get_logger(__name__)


lowerCAmelCase							:    int  							=							TypeVar("""DatasetType""", Dataset, IterableDataset)



def 					a__				(       snake_case__ ,				snake_case__ = None ,				snake_case__ = None ,				snake_case__ = None ,				snake_case__ = None ,				snake_case__ = "first_exhausted" ,				)		->      DatasetType:
			from .arrow_dataset import Dataset
			from .iterable_dataset import IterableDataset

			if not datasets:
						raise ValueError("""Unable to interleave an empty list of datasets."""       )
			for i, dataset in enumerate(snake_case__       ):
						if not isinstance(snake_case__ ,				(Dataset, IterableDataset)       ):
									if isinstance(snake_case__ ,				(DatasetDict, IterableDatasetDict)       ):
												if not dataset:
															raise ValueError(
															    F'Expected a list of Dataset objects or a list of IterableDataset objects, but element at position {i} '
															    """is an empty dataset dictionary."""       )
												raise ValueError(
												    F'Dataset at position {i} has at least one split: {list(snake_case__       )}\n'
												    F'Please pick one to interleave with the other datasets, for example: dataset[\'{next(iter(snake_case__       )       )}\']'       )
									raise ValueError(
									    F'Expected a list of Dataset objects or a list of IterableDataset objects, but element at position {i} is a {type(snake_case__       ).__name__}.'       )
						if i == 0:
									lowerCamelCase   ,     lowerCamelCase       =      (
									    (Dataset, IterableDataset) if isinstance(snake_case__ ,				snake_case__       ) else (IterableDataset, Dataset)
									)
						elif not isinstance(snake_case__ ,				snake_case__       ):
									raise ValueError(
									    F'Unable to interleave a {dataset_type.__name__} (at position 0) with a {other_type.__name__} (at position {i}). Expected a list of Dataset objects or a list of IterableDataset objects.'       )
			if stopping_strategy not in ["first_exhausted", "all_exhausted"]:
						raise ValueError(F'{stopping_strategy} is not supported. Please enter a valid stopping_strategy.'       )
			if dataset_type is Dataset:
						return _interleave_map_style_datasets(
						    snake_case__ ,				snake_case__ ,				snake_case__ ,				info=snake_case__ ,				split=snake_case__ ,				stopping_strategy=snake_case__       )
			else:
						return _interleave_iterable_datasets(
						    snake_case__ ,				snake_case__ ,				snake_case__ ,				info=snake_case__ ,				split=snake_case__ ,				stopping_strategy=snake_case__       )



def 					a__				(       snake_case__ ,				snake_case__ = None ,				snake_case__ = None ,				snake_case__ = 0 ,				)		->      DatasetType:

			if not dsets:
						raise ValueError("""Unable to concatenate an empty list of datasets."""       )
			for i, dataset in enumerate(snake_case__       ):
						if not isinstance(snake_case__ ,				(Dataset, IterableDataset)       ):
									if isinstance(snake_case__ ,				(DatasetDict, IterableDatasetDict)       ):
												if not dataset:
															raise ValueError(
															    F'Expected a list of Dataset objects or a list of IterableDataset objects, but element at position {i} '
															    """is an empty dataset dictionary."""       )
												raise ValueError(
												    F'Dataset at position {i} has at least one split: {list(snake_case__       )}\n'
												    F'Please pick one to interleave with the other datasets, for example: dataset[\'{next(iter(snake_case__       )       )}\']'       )
									raise ValueError(
									    F'Expected a list of Dataset objects or a list of IterableDataset objects, but element at position {i} is a {type(snake_case__       ).__name__}.'       )
						if i == 0:
									lowerCamelCase   ,     lowerCamelCase       =      (
									    (Dataset, IterableDataset) if isinstance(snake_case__ ,				snake_case__       ) else (IterableDataset, Dataset)
									)
						elif not isinstance(snake_case__ ,				snake_case__       ):
									raise ValueError(
									    F'Unable to interleave a {dataset_type.__name__} (at position 0) with a {other_type.__name__} (at position {i}). Expected a list of Dataset objects or a list of IterableDataset objects.'       )
			if dataset_type is Dataset:
						return _concatenate_map_style_datasets(snake_case__ ,				info=snake_case__ ,				split=snake_case__ ,				axis=snake_case__       )
			else:
						return _concatenate_iterable_datasets(snake_case__ ,				info=snake_case__ ,				split=snake_case__ ,				axis=snake_case__       )



