


"""simple docstring"""







from typing import Any






class 						_A  :







    """simple docstring"""




    def __init__(					self				:    Any				, __UpperCAmelCase				:    Any):
      a						:		Optional[Any]      							=			data
      a						:		Optional[int]      							=			None






    def __repr__(					self				:    str):
      return f'''Node({self.data})'''






class 						_A  :







    """simple docstring"""




    def __init__(					self				:    str):
      a						:		Dict      							=			None






    def __iter__(					self				:    int):
      a						:		str      							=			self.head
      while node:
        yield node.data
        a						:		Union[str, Any]      							=			node.next






    def __len__(					self				:    Any):
      return sum(1 for _ in self)






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






    def __getitem__(					self				:    int				, __UpperCAmelCase				:    int):
      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]				, __UpperCAmelCase				:    int				, __UpperCAmelCase				:    Any):
      if not 0 <= index < len(self):
        raise ValueError("list index out of range.")
      a						:		List[Any]      							=			self.head
      for _ in range(__UpperCAmelCase):
        a						:		Dict      							=			current.next
      a						:		Optional[Any]      							=			data






    def 	__snake_case							(					self				:    Any				, __UpperCAmelCase				:    Any):
      self.insert_nth(len(self)				, __UpperCAmelCase)






    def 	__snake_case							(					self				:    List[Any]				, __UpperCAmelCase				:    Any):
      self.insert_nth(0				, __UpperCAmelCase)






    def 	__snake_case							(					self				:    Optional[int]				, __UpperCAmelCase				:    int				, __UpperCAmelCase				:    Any):
      if not 0 <= index <= len(self):
        raise IndexError("list index out of range")
      a						:		Any      							=			Node(__UpperCAmelCase)
      if self.head is None:
        a						:		int      							=			new_node
      elif index == 0:
        a						:		Dict      							=			self.head  # link new_node to head
        a						:		Union[str, Any]      							=			new_node
      else:
        a						:		List[str]      							=			self.head
        for _ in range(index - 1):
          a						:		int      							=			temp.next
        a						:		Optional[int]      							=			temp.next
        a						:		int      							=			new_node






    def 	__snake_case							(					self				:    int):  # print every node data
      print(self)






    def 	__snake_case							(					self				:    Optional[Any]):
      return self.delete_nth(0)






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






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






    def 	__snake_case							(					self				:    int):
      return self.head is None






    def 	__snake_case							(					self				:    List[Any]):
      a						:		str      							=			None
      a						:		Tuple      							=			self.head

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






def      lowercase			(				)->      None:
  '''simple docstring'''







  a						:		Any      							=			LinkedList()
  assert linked_list.is_empty() is True
  assert str(A_       ) == ""

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

  linked_list.insert_head(0       )
  linked_list.insert_tail(11       )
  assert str(A_       ) == "->".join(str(A_       ) 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(A_       ) == 9
  assert str(A_       ) == "->".join(str(A_       ) 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						:		Optional[int]      							=			-i
  assert all(linked_list[i] == -i for i in range(0  ,   9       )       ) is True

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


def      lowercase			(				)->      None:
  '''simple docstring'''







  a						:		str      							=			[
      -9,
      100,
      Node(77_345_112       ),
      "dlrow olleH",
      7,
      5_555,
      0,
      -1_9_2.5_5_5_5_5,
      "Hello, world!",
      7_7.9,
      Node(10       ),
      None,
      None,
      1_2.2_0,
  ]
  a						:		str      							=			LinkedList()

  for i in test_input:
    linked_list.insert_tail(A_       )

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

  # Delete the tail
  a						:		int      							=			linked_list.delete_tail()
  assert result == 1_2.2
  assert (
      str(A_       ) == "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						:		Union[str, Any]      							=			linked_list.delete_nth(10       )
  assert result is None
  assert (
      str(A_       ) == "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(A_       )
      == "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(A_       )
  assert (
      str(A_       )
      == "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(A_       )
      == "None->None->Node(10)->77.9->Hello, world!->-192.55555->0->5555->"
      "7->dlrow olleH->Node(77345112)->100->Node(Hello again, world!)"
  )


def      lowercase			(				)->      Optional[int]:
  '''simple docstring'''







  from doctest import testmod

  testmod()

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


if __name__ == "__main__":
 main()














from typing import TYPE_CHECKING

from ...utils import OptionalDependencyNotAvailable, _LazyModule, is_sentencepiece_available


A__	:			Optional[int]			   = {}

try:
							if not is_sentencepiece_available():
														raise OptionalDependencyNotAvailable()
except OptionalDependencyNotAvailable:
							pass
else:
							A__	:			Optional[int]			   = ['GPTSw3Tokenizer']


if TYPE_CHECKING:
							try:
														if not is_sentencepiece_available():
																					raise OptionalDependencyNotAvailable()
							except OptionalDependencyNotAvailable:
														pass
							else:
														from .tokenization_gpt_swa import GPTSwaTokenizer

else:
							import sys

							A__	:			Optional[int]			   = _LazyModule(__name__, globals()['__file__'], _import_structure, module_spec=__spec__)




