




'''simple docstring'''
class   __UpperCAmelCase				:



					'''simple docstring'''





					def __init__(	self     :						List[Any]      ,       _lowercase     :						int      ,       _lowercase     :						List[str]=None      ,       _lowercase     :						str=None)    ->							List[Any]:
								A_									= data
								A_									= previous
								A_									= next_node



					def __str__(	self     :						str)    ->							str:
								return F'{self.data}'



					def     __snake_case						(	self     :						List[Any])    ->							int:
								return self.data



					def     __snake_case						(	self     :						List[str])    ->							str:
								return self.next



					def     __snake_case						(	self     :						int)    ->							Dict:
								return self.previous





class   __UpperCAmelCase				:



					'''simple docstring'''





					def __init__(	self     :						Optional[Any]      ,       _lowercase     :						Tuple)    ->							List[str]:
								A_									= head



					def __iter__(	self     :						List[Any])    ->							str:
								return self



					def     __snake_case						(	self     :						Dict)    ->							Optional[Any]:
								if not self.current:
											raise StopIteration
								else:
											A_									= self.current.get_data()
											A_									= self.current.get_next()
											return value





class   __UpperCAmelCase				:



					'''simple docstring'''





					def __init__(	self     :						str)    ->							Dict:
								A_									= None  # First node in list
								A_									= None  # Last node in list



					def __str__(	self     :						Tuple)    ->							List[Any]:
								A_									= self.head
								A_									= []
								while current is not None:
											nodes.append(current.get_data())
											A_									= current.get_next()
								return " ".join(str(_lowercase) for node in nodes)



					def __contains__(	self     :						str      ,       _lowercase     :						int)    ->							int:
								A_									= self.head
								while current:
											if current.get_data() == value:
														return True
											A_									= current.get_next()
								return False



					def __iter__(	self     :						int)    ->							int:
								return LinkedListIterator(self.head)



					def     __snake_case						(	self     :						int)    ->							Tuple:
								if self.head:
											return self.head.get_data()
								return None



					def     __snake_case						(	self     :						Dict)    ->							Union[str, Any]:
								if self.tail:
											return self.tail.get_data()
								return None



					def     __snake_case						(	self     :						Optional[Any]      ,       _lowercase     :						Node)    ->							None:
								if self.head is None:
											A_									= node
											A_									= node
								else:
											self.insert_before_node(self.head      ,       _lowercase)



					def     __snake_case						(	self     :						Any      ,       _lowercase     :						Node)    ->							None:
								if self.head is None:
											self.set_head(_lowercase)
								else:
											self.insert_after_node(self.tail      ,       _lowercase)



					def     __snake_case						(	self     :						Any      ,       _lowercase     :						int)    ->							None:
								A_									= Node(_lowercase)
								if self.head is None:
											self.set_head(_lowercase)
								else:
											self.set_tail(_lowercase)



					def     __snake_case						(	self     :						int      ,       _lowercase     :						Node      ,       _lowercase     :						Node)    ->							None:
								A_									= node
								A_									= node.previous

								if node.get_previous() is None:
											A_									= node_to_insert
								else:
											A_									= node_to_insert

								A_									= node_to_insert



					def     __snake_case						(	self     :						Optional[int]      ,       _lowercase     :						Node      ,       _lowercase     :						Node)    ->							None:
								A_									= node
								A_									= node.next

								if node.get_next() is None:
											A_									= node_to_insert
								else:
											A_									= node_to_insert

								A_									= node_to_insert



					def     __snake_case						(	self     :						str      ,       _lowercase     :						int      ,       _lowercase     :						int)    ->							None:
								A_									= 1
								A_									= Node(_lowercase)
								A_									= self.head
								while node:
											if current_position == position:
														self.insert_before_node(_lowercase      ,       _lowercase)
														return
											current_position += 1
											A_									= node.next
								self.insert_after_node(self.tail      ,       _lowercase)



					def     __snake_case						(	self     :						List[Any]      ,       _lowercase     :						int)    ->							Node:
								A_									= self.head
								while node:
											if node.get_data() == item:
														return node
											A_									= node.get_next()
								raise Exception('Node not found')



					def     __snake_case						(	self     :						Optional[Any]      ,       _lowercase     :						int)    ->							Union[str, Any]:
								if (node := self.get_node(_lowercase)) is not None:
											if node == self.head:
														A_									= self.head.get_next()

											if node == self.tail:
														A_									= self.tail.get_previous()

											self.remove_node_pointers(_lowercase)



					@staticmethod
					def     __snake_case						(	_lowercase     :						Node)    ->							None:
								if node.get_next():
											A_									= node.previous

								if node.get_previous():
											A_									= node.next

								A_									= None
								A_									= None



					def     __snake_case						(	self     :						Tuple)    ->							str:
								return self.head is None





def 			lowerCamelCase(							)		->		None:
			pass


if __name__ == "__main__":
							import doctest

							doctest.testmod()










'''simple docstring'''
import pytest

from datasets.splits import SplitDict, SplitInfo
from datasets.utils.py_utils import asdict





@pytest.mark.parametrize(
    'split_dict'       ,[
        SplitDict(),
        SplitDict({'train': SplitInfo(name='train'       ,num_bytes=1337       ,num_examples=42       ,dataset_name='my_dataset'     )}     ),
        SplitDict({'train': SplitInfo(name='train'       ,num_bytes=1337       ,num_examples=42     )}     ),
        SplitDict({'train': SplitInfo()}     ),
    ]       ,)
def 			lowerCamelCase(							SCREAMING_SNAKE_CASE_     )		->		List[str]:
			A_									= split_dict._to_yaml_list()
			assert len(SCREAMING_SNAKE_CASE_     ) == len(SCREAMING_SNAKE_CASE_     )
			A_									= SplitDict._from_yaml_list(SCREAMING_SNAKE_CASE_     )
			for split_name, split_info in split_dict.items():
						# dataset_name field is deprecated, and is therefore not part of the YAML dump
						A_									= None
						# the split name of split_dict takes over the name of the split info object
						A_									= split_name
			assert split_dict == reloaded






@pytest.mark.parametrize(
    'split_info'       ,[SplitInfo(), SplitInfo(dataset_name=SCREAMING_SNAKE_CASE_     ), SplitInfo(dataset_name='my_dataset'     )]     )
def 			lowerCamelCase(							SCREAMING_SNAKE_CASE_     )		->		Optional[Any]:
			# For backward compatibility, we need asdict(split_dict) to return split info dictrionaries with the "dataset_name"
			# field even if it's deprecated. This way old versionso of `datasets` can still reload dataset_infos.json files
			A_									= asdict(SplitDict({'train': split_info}     )     )
			assert "dataset_name" in split_dict_asdict["train"]
			assert split_dict_asdict["train"]["dataset_name"] == split_info.dataset_name




