






from typing import Any





class 						SCREAMING_SNAKE_CASE				:





							"""simple docstring"""

							def __init__(  self:   str		,     __A:   Any   )    ->				Optional[Any]:
												_A								= data
												_A								= None



							def __repr__(  self:   int   )    ->				str:
												return f"""Node({self.data})"""





class 						SCREAMING_SNAKE_CASE				:





							"""simple docstring"""

							def __init__(  self:   int   )    ->				Any:
												_A								= None

							def __iter__(  self:   List[str]   )    ->				Any:
												_A								= self.head
												while node:
																	yield node.data
																	_A								= node.next

							def __len__(  self:   int   )    ->				int:
												return sum(1 for _ in self   )

							def __repr__(  self:   Optional[int]   )    ->				str:
												return "->".join([str(__A   ) for item in self]   )

							def __getitem__(  self:   int		,     __A:   int   )    ->				Any:
												if not 0 <= index < len(self   ):
																	raise ValueError('''list index out of range.'''   )
												for i, node in enumerate(self   ):
																	if i == index:
																						return node
												return None

							def __setitem__(  self:   Tuple		,     __A:   int		,     __A:   Any   )    ->				None:
												if not 0 <= index < len(self   ):
																	raise ValueError('''list index out of range.'''   )
												_A								= self.head
												for _ in range(__A   ):
																	_A								= current.next
												_A								= data

							def       __A (  self:   int		,     __A:   Any   )    ->				None:
												self.insert_nth(len(self   )		,     __A   )

							def       __A (  self:   List[str]		,     __A:   Any   )    ->				None:
												self.insert_nth(0		,     __A   )

							def       __A (  self:   str		,     __A:   int		,     __A:   Any   )    ->				None:
												if not 0 <= index <= len(self   ):
																	raise IndexError('''list index out of range'''   )
												_A								= Node(__A   )
												if self.head is None:
																	_A								= new_node
												elif index == 0:
																	_A								= self.head  # link new_node to head
																	_A								= new_node
												else:
																	_A								= self.head
																	for _ in range(index - 1   ):
																						_A								= temp.next
																	_A								= temp.next
																	_A								= new_node

							def       __A (  self:   Union[str, Any]   )    ->				None:  # print every node data
												print(self   )

							def       __A (  self:   Dict   )    ->				Any:
												return self.delete_nth(0   )

							def       __A (  self:   Tuple   )    ->				Any:  # delete from tail
												return self.delete_nth(len(self   ) - 1   )

							def       __A (  self:   Optional[Any]		,     __A:   int = 0   )    ->				Any:
												if not 0 <= index <= len(self   ) - 1:  # test if index is valid
																	raise IndexError('''List index out of range.'''   )
												_A								= self.head  # default first node
												if index == 0:
																	_A								= self.head.next
												else:
																	_A								= self.head
																	for _ in range(index - 1   ):
																						_A								= temp.next
																	_A								= temp.next
																	_A								= temp.next.next
												return delete_node.data

							def       __A (  self:   Any   )    ->				bool:
												return self.head is None



							def       __A (  self:   Any   )    ->				None:
												_A								= None
												_A								= self.head

												while current:
																	# Store the current node's next node.
																	_A								= current.next
																	# Make the current node's next point backwards
																	_A								= prev
																	# Make the previous node be the current node
																	_A								= current
																	# Make the current node the next node (to progress iteration)
																	_A								= next_node
												# Return prev in order to put the head at the end
												_A								= prev




def      __A					(     ):

					'''simple docstring'''







					_A								= LinkedList()
					assert linked_list.is_empty() is True
					assert str(_lowercase ) == ""

					try:
										linked_list.delete_head()
										raise AssertionError  # This should not happen.
					except IndexError:
										assert True  # This should happen.

					try:
										linked_list.delete_tail()
										raise AssertionError  # This should not happen.
					except IndexError:
										assert True  # This should happen.

					for i in range(10 ):
										assert len(_lowercase ) == i
										linked_list.insert_nth(_lowercase					,			i + 1 )
					assert str(_lowercase ) == "->".join(str(_lowercase ) for i in range(1					,			11 ) )

					linked_list.insert_head(0 )
					linked_list.insert_tail(11 )
					assert str(_lowercase ) == "->".join(str(_lowercase ) for i in range(0					,			12 ) )

					assert linked_list.delete_head() == 0
					assert linked_list.delete_nth(9 ) == 10
					assert linked_list.delete_tail() == 11
					assert len(_lowercase ) == 9
					assert str(_lowercase ) == "->".join(str(_lowercase ) for i in range(1					,			10 ) )

					assert all(linked_list[i] == i + 1 for i in range(0					,			9 ) ) is True

					for i in range(0					,			9 ):
										_A								= -i
					assert all(linked_list[i] == -i for i in range(0					,			9 ) ) is True

					linked_list.reverse()
					assert str(_lowercase ) == "->".join(str(_lowercase ) for i in range(-8					,			1 ) )




def      __A					(     ):

					'''simple docstring'''







					_A								= [
					    -9,
					    1_00,
					    Node(77_34_51_12 ),
					    '''dlrow olleH''',
					    7,
					    55_55,
					    0,
					    -1_92.5_55_55,
					    '''Hello, world!''',
					    77.9,
					    Node(10 ),
					    None,
					    None,
					    12.20,
					]
					_A								= LinkedList()

					for i in test_input:
										linked_list.insert_tail(_lowercase )

					# Check if it's empty or not
					assert linked_list.is_empty() is False
					assert (
					    str(_lowercase ) == "-9->100->Node(77345112)->dlrow olleH->7->5555->0->"
					    "-192.55555->Hello, world!->77.9->Node(10)->None->None->12.2"
					)

					# Delete the head
					_A								= linked_list.delete_head()
					assert result == -9
					assert (
					    str(_lowercase ) == "100->Node(77345112)->dlrow olleH->7->5555->0->-192.55555->"
					    "Hello, world!->77.9->Node(10)->None->None->12.2"
					)

					# Delete the tail
					_A								= linked_list.delete_tail()
					assert result == 12.2
					assert (
					    str(_lowercase ) == "100->Node(77345112)->dlrow olleH->7->5555->0->-192.55555->"
					    "Hello, world!->77.9->Node(10)->None->None"
					)

					# Delete a node in specific location in linked list
					_A								= linked_list.delete_nth(10 )
					assert result is None
					assert (
					    str(_lowercase ) == "100->Node(77345112)->dlrow olleH->7->5555->0->-192.55555->"
					    "Hello, world!->77.9->Node(10)->None"
					)

					# Add a Node instance to its head
					linked_list.insert_head(Node('''Hello again, world!''' ) )
					assert (
					    str(_lowercase )
					    == "Node(Hello again, world!)->100->Node(77345112)->dlrow olleH->"
					    "7->5555->0->-192.55555->Hello, world!->77.9->Node(10)->None"
					)

					# Add None to its tail
					linked_list.insert_tail(_lowercase )
					assert (
					    str(_lowercase )
					    == "Node(Hello again, world!)->100->Node(77345112)->dlrow olleH->"
					    "7->5555->0->-192.55555->Hello, world!->77.9->Node(10)->None->None"
					)

					# Reverse the linked list
					linked_list.reverse()
					assert (
					    str(_lowercase )
					    == "None->None->Node(10)->77.9->Hello, world!->-192.55555->0->5555->"
					    "7->dlrow olleH->Node(77345112)->100->Node(Hello again, world!)"
					)




def      __A					(     ):

					'''simple docstring'''







					from doctest import testmod

					testmod()

					_A								= LinkedList()
					linked_list.insert_head(input('''Inserting 1st at head ''' ).strip() )
					linked_list.insert_head(input('''Inserting 2nd at head ''' ).strip() )
					print('''\nPrint list:''' )
					linked_list.print_list()
					linked_list.insert_tail(input('''\nInserting 1st at tail ''' ).strip() )
					linked_list.insert_tail(input('''Inserting 2nd at tail ''' ).strip() )
					print('''\nPrint list:''' )
					linked_list.print_list()
					print('''\nDelete head''' )
					linked_list.delete_head()
					print('''Delete tail''' )
					linked_list.delete_tail()
					print('''\nPrint list:''' )
					linked_list.print_list()
					print('''\nReverse linked list''' )
					linked_list.reverse()
					print('''\nPrint list:''' )
					linked_list.print_list()
					print('''\nString representation of linked list:''' )
					print(_lowercase )
					print('''\nReading/changing Node data using indexing:''' )
					print(f"""Element at Position 1: {linked_list[1]}""" )
					_A								= input('''Enter New Value: ''' ).strip()
					print('''New list:''' )
					print(_lowercase )
					print(f"""length of linked_list is : {len(_lowercase )}""" )


if __name__ == "__main__":
				main()











import os
from pathlib import Path
from unittest.mock import patch

import pytest
import zstandard as zstd

from datasets.download.download_config import DownloadConfig
from datasets.utils.file_utils import (
    OfflineModeIsEnabled,
    cached_path,
    fsspec_get,
    fsspec_head,
    ftp_get,
    ftp_head,
    get_from_cache,
    http_get,
    http_head,
)


__A      =				'\\n    Text data.\n    Second line of data.'

__A      =				'file'




@pytest.fixture(scope='''session''' )
def      __A					(     _lowercase ):

					'''simple docstring'''







					_A								= tmp_path_factory.mktemp('''data''' ) / (FILE_PATH + '''.zstd''')
					_A								= bytes(_lowercase					,			'''utf-8''' )
					with zstd.open(_lowercase					,			'''wb''' ) as f:
										f.write(_lowercase )
					return path




@pytest.fixture
def      __A					(     _lowercase ):

					'''simple docstring'''







					with open(os.path.join(tmpfs.local_root_dir					,			_lowercase )					,			'''w''' ) as f:
										f.write(_lowercase )
					return FILE_PATH




@pytest.mark.parametrize('''compression_format'''					,			['''gzip''', '''xz''', '''zstd'''] )
def      __A					(     _lowercase					,			_lowercase					,			_lowercase					,			_lowercase					,			_lowercase					,			_lowercase ):

					'''simple docstring'''







					_A								= {'''gzip''': gz_file, '''xz''': xz_file, '''zstd''': zstd_path}
					_A								= input_paths[compression_format]
					_A								= tmp_path / '''cache'''
					_A								= DownloadConfig(cache_dir=_lowercase					,			extract_compressed_file=_lowercase )
					_A								= cached_path(_lowercase					,			download_config=_lowercase )
					with open(_lowercase ) as f:
										_A								= f.read()
					with open(_lowercase ) as f:
										_A								= f.read()
					assert extracted_file_content == expected_file_content




@pytest.mark.parametrize('''default_extracted'''					,			[True, False] )
@pytest.mark.parametrize('''default_cache_dir'''					,			[True, False] )
def      __A					(     _lowercase					,			_lowercase					,			_lowercase					,			_lowercase					,			_lowercase ):

					'''simple docstring'''







					_A								= '''custom_cache'''
					_A								= '''custom_extracted_dir'''
					_A								= tmp_path / '''custom_extracted_path'''
					if default_extracted:
										_A								= ('''downloads''' if default_cache_dir else custom_cache_dir, '''extracted''')
					else:
										monkeypatch.setattr('''datasets.config.EXTRACTED_DATASETS_DIR'''					,			_lowercase )
										monkeypatch.setattr('''datasets.config.EXTRACTED_DATASETS_PATH'''					,			str(_lowercase ) )
										_A								= custom_extracted_path.parts[-2:] if default_cache_dir else (custom_cache_dir, custom_extracted_dir)

					_A								= xz_file
					_A								= (
					    DownloadConfig(extract_compressed_file=_lowercase )
					    if default_cache_dir
					    else DownloadConfig(cache_dir=tmp_path / custom_cache_dir					,			extract_compressed_file=_lowercase )
					)
					_A								= cached_path(_lowercase					,			download_config=_lowercase )
					assert Path(_lowercase ).parent.parts[-2:] == expected




def      __A					(     _lowercase ):

					'''simple docstring'''







					_A								= str(Path(_lowercase ).resolve() )
					assert cached_path(_lowercase ) == text_file
					# relative path
					_A								= str(Path(_lowercase ).resolve().relative_to(Path(os.getcwd() ) ) )
					assert cached_path(_lowercase ) == text_file




def      __A					(     _lowercase ):

					'''simple docstring'''







					_A								= str(tmp_path.resolve() / '''__missing_file__.txt''' )
					with pytest.raises(_lowercase ):
										cached_path(_lowercase )
					# relative path
					_A								= '''./__missing_file__.txt'''
					with pytest.raises(_lowercase ):
										cached_path(_lowercase )




def      __A					(     _lowercase ):

					'''simple docstring'''







					_A								= get_from_cache(f"""tmp://{tmpfs_file}""" )
					with open(_lowercase ) as f:
										_A								= f.read()
					assert output_file_content == FILE_CONTENT




@patch('''datasets.config.HF_DATASETS_OFFLINE'''					,			_lowercase )
def      __A					(     ):

					'''simple docstring'''







					with pytest.raises(_lowercase ):
										cached_path('''https://huggingface.co''' )




@patch('''datasets.config.HF_DATASETS_OFFLINE'''					,			_lowercase )
def      __A					(     _lowercase ):

					'''simple docstring'''







					_A								= tmp_path_factory.mktemp('''data''' ) / '''file.html'''
					with pytest.raises(_lowercase ):
										http_get('''https://huggingface.co'''					,			temp_file=_lowercase )
					with pytest.raises(_lowercase ):
										http_head('''https://huggingface.co''' )




@patch('''datasets.config.HF_DATASETS_OFFLINE'''					,			_lowercase )
def      __A					(     _lowercase ):

					'''simple docstring'''







					_A								= tmp_path_factory.mktemp('''data''' ) / '''file.html'''
					with pytest.raises(_lowercase ):
										ftp_get('''ftp://huggingface.co'''					,			temp_file=_lowercase )
					with pytest.raises(_lowercase ):
										ftp_head('''ftp://huggingface.co''' )




@patch('''datasets.config.HF_DATASETS_OFFLINE'''					,			_lowercase )
def      __A					(     _lowercase ):

					'''simple docstring'''







					_A								= tmp_path_factory.mktemp('''data''' ) / '''file.html'''
					with pytest.raises(_lowercase ):
										fsspec_get('''s3://huggingface.co'''					,			temp_file=_lowercase )
					with pytest.raises(_lowercase ):
										fsspec_head('''s3://huggingface.co''' )



