






"""simple docstring"""



from typing import Any





class 					_UpperCAmelCase       :




					def __init__(				self     :						Optional[Any]    ,						A     :						Any   )  ->  Tuple:
							lowercase_ : List[Any]							       =   data
							lowercase_ : Union[str, Any]							       =   None






					def __repr__(				self     :						Union[str, Any]   )  ->  str:
							return F'''Node({self.data})'''





class 					_UpperCAmelCase       :




					def __init__(				self     :						Dict   )  ->  str:
							lowercase_ : Dict							       =   None




					def __iter__(				self     :						Optional[int]   )  ->  Any:
							lowercase_ : Optional[Any]							       =   self.head
							while node:
									yield node.data
									lowercase_ : Tuple							       =   node.next




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




					def __repr__(				self     :						Tuple   )  ->  str:
							return "->".join([str(A   ) for item in self]   )




					def __getitem__(				self     :						List[str]    ,						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     :						List[Any]    ,						A     :						int    ,						A     :						Any   )  ->  None:
							if not 0 <= index < len(self   ):
									raise ValueError('''list index out of range.'''   )
							lowercase_ : List[Any]							       =   self.head
							for _ in range(A   ):
									lowercase_ : Union[str, Any]							       =   current.next
							lowercase_ : str							       =   data




					def   A  (				self     :						Optional[int]    ,						A     :						Any   )  ->  None:
							self.insert_nth(len(self   )    ,						A   )




					def   A  (				self     :						Any    ,						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'''   )
							lowercase_ : Union[str, Any]							       =   Node(A   )
							if self.head is None:
									lowercase_ : Union[str, Any]							       =   new_node
							elif index == 0:
									lowercase_ : Tuple							       =   self.head  # link new_node to head
									lowercase_ : List[str]							       =   new_node
							else:
									lowercase_ : str							       =   self.head
									for _ in range(index - 1   ):
											lowercase_ : Dict							       =   temp.next
									lowercase_ : str							       =   temp.next
									lowercase_ : Optional[Any]							       =   new_node




					def   A  (				self     :						Optional[Any]   )  ->  None:  # print every node data
							print(self   )




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




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




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




					def   A  (				self     :						List[Any]   )  ->  bool:
							return self.head is None






					def   A  (				self     :						Union[str, Any]   )  ->  None:
							lowercase_ : str							       =   None
							lowercase_ : Optional[Any]							       =   self.head

							while current:
									# Store the current node's next node.
									lowercase_ : int							       =   current.next
									# Make the current node's next point backwards
									lowercase_ : Union[str, Any]							       =   prev
									# Make the previous node be the current node
									lowercase_ : str							       =   current
									# Make the current node the next node (to progress iteration)
									lowercase_ : Optional[Any]							       =   next_node
							# Return prev in order to put the head at the end
							lowercase_ : Any							       =   prev



def 						lowercase    (				):
		lowercase_ : str							       =   LinkedList()
		assert linked_list.is_empty() is True
		assert str(__snake_case	) == ""

		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(1_0	):
				assert len(__snake_case	) == i
				linked_list.insert_nth(__snake_case		,					i + 1	)
		assert str(__snake_case	) == "->".join(str(__snake_case	) for i in range(1		,					1_1	)	)

		linked_list.insert_head(0	)
		linked_list.insert_tail(1_1	)
		assert str(__snake_case	) == "->".join(str(__snake_case	) for i in range(0		,					1_2	)	)

		assert linked_list.delete_head() == 0
		assert linked_list.delete_nth(9	) == 1_0
		assert linked_list.delete_tail() == 1_1
		assert len(__snake_case	) == 9
		assert str(__snake_case	) == "->".join(str(__snake_case	) for i in range(1		,					1_0	)	)

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

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

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



def 						lowercase    (				):
		lowercase_ : Optional[int]							       =   [
		    -9,
		    1_0_0,
		    Node(7_7_3_4_5_1_1_2	),
		    '''dlrow olleH''',
		    7,
		    5_5_5_5,
		    0,
		    -192.55555,
		    '''Hello, world!''',
		    77.9,
		    Node(1_0	),
		    None,
		    None,
		    12.20,
		]
		lowercase_ : Any							       =   LinkedList()

		for i in test_input:
				linked_list.insert_tail(__snake_case	)

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

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

		# Delete the tail
		lowercase_ : int							       =   linked_list.delete_tail()
		assert result == 12.2
		assert (
		    str(__snake_case	) == "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
		lowercase_ : int							       =   linked_list.delete_nth(1_0	)
		assert result is None
		assert (
		    str(__snake_case	) == "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(__snake_case	)
		    == "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(__snake_case	)
		assert (
		    str(__snake_case	)
		    == "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(__snake_case	)
		    == "None->None->Node(10)->77.9->Hello, world!->-192.55555->0->5555->"
		    "7->dlrow olleH->Node(77345112)->100->Node(Hello again, world!)"
		)



def 						lowercase    (				):
		from doctest import testmod

		testmod()

		lowercase_ : List[Any]							       =   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(__snake_case	)
		print('''\nReading/changing Node data using indexing:'''	)
		print(F'''Element at Position 1: {linked_list[1]}'''	)
		lowercase_ : int							       =   input('''Enter New Value: '''	).strip()
		print('''New list:'''	)
		print(__snake_case	)
		print(F'''length of linked_list is : {len(__snake_case	)}'''	)


if __name__ == "__main__":
						main()








import json
import os
import tempfile

from transformers.testing_utils import check_json_file_has_correct_format

class 		UpperCAmelCase__			:




			'''simple docstring'''






			UpperCamelCase									=       None




			def  snake_case__     (   self							: List[str] ):
					'''simple docstring'''





					__UpperCAmelCase    :     List[Any]													=	self.feature_extraction_class(**self.feat_extract_dict )
					__UpperCAmelCase    :     Optional[int]													=	json.loads(feat_extract.to_json_string() )
					for key, value in self.feat_extract_dict.items():
							self.assertEqual(obj[key]       ,       a_ )




			def  snake_case__     (   self							: Any ):
					'''simple docstring'''





					__UpperCAmelCase    :     str													=	self.feature_extraction_class(**self.feat_extract_dict )

					with tempfile.TemporaryDirectory() as tmpdirname:
							__UpperCAmelCase    :     Union[str, Any]													=	os.path.join(a_       ,       '''feat_extract.json''' )
							feat_extract_first.to_json_file(a_ )
							__UpperCAmelCase    :     Any													=	self.feature_extraction_class.from_json_file(a_ )

					self.assertEqual(feat_extract_second.to_dict()       ,       feat_extract_first.to_dict() )




			def  snake_case__     (   self							: Optional[int] ):
					'''simple docstring'''





					__UpperCAmelCase    :     Tuple													=	self.feature_extraction_class(**self.feat_extract_dict )

					with tempfile.TemporaryDirectory() as tmpdirname:
							__UpperCAmelCase    :     List[str]													=	feat_extract_first.save_pretrained(a_ )[0]
							check_json_file_has_correct_format(a_ )
							__UpperCAmelCase    :     Optional[Any]													=	self.feature_extraction_class.from_pretrained(a_ )

					self.assertEqual(feat_extract_second.to_dict()       ,       feat_extract_first.to_dict() )




			def  snake_case__     (   self							: Dict ):
					'''simple docstring'''





					__UpperCAmelCase    :     int													=	self.feature_extraction_class()
					self.assertIsNotNone(a_ )





