
class     lowerCamelCase      :







	def __init__(     self      :Union[str, Any]   ,     lowercase      :int   ,     lowercase      :Tuple=None   ,     lowercase      :str=None			)		->      List[Any]:







				"""simple docstring"""






				SCREAMING_SNAKE_CASE     						= data
				SCREAMING_SNAKE_CASE     						= previous
				SCREAMING_SNAKE_CASE     						= next_node







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







				"""simple docstring"""






				return f"""{self.data}"""







	def  snake_case__     (     self      :Optional[int]			)		->      int:







				"""simple docstring"""






				return self.data







	def  snake_case__     (     self      :int			)		->      Tuple:







				"""simple docstring"""






				return self.next







	def  snake_case__     (     self      :Dict			)		->      int:







				"""simple docstring"""






				return self.previous





class     lowerCamelCase      :







	def __init__(     self      :Dict   ,     lowercase      :Optional[Any]			)		->      int:







				"""simple docstring"""






				SCREAMING_SNAKE_CASE     						= head







	def __iter__(     self      :Optional[int]			)		->      List[Any]:







				"""simple docstring"""






				return self







	def  snake_case__     (     self      :int			)		->      Union[str, Any]:







				"""simple docstring"""






				if not self.current:
							raise StopIteration
				else:
							SCREAMING_SNAKE_CASE     						= self.current.get_data()
							SCREAMING_SNAKE_CASE     						= self.current.get_next()
							return value





class     lowerCamelCase      :







	def __init__(     self      :int			)		->      Union[str, Any]:







				"""simple docstring"""






				SCREAMING_SNAKE_CASE     						= None  # First node in list
				SCREAMING_SNAKE_CASE     						= None  # Last node in list







	def __str__(     self      :Optional[Any]			)		->      Optional[Any]:







				"""simple docstring"""






				SCREAMING_SNAKE_CASE     						= self.head
				SCREAMING_SNAKE_CASE     						= []
				while current is not None:
							nodes.append(current.get_data()			)
							SCREAMING_SNAKE_CASE     						= current.get_next()
				return " ".join(str(lowercase			) for node in nodes			)







	def __contains__(     self      :Optional[Any]   ,     lowercase      :int			)		->      str:







				"""simple docstring"""






				SCREAMING_SNAKE_CASE     						= self.head
				while current:
							if current.get_data() == value:
										return True
							SCREAMING_SNAKE_CASE     						= current.get_next()
				return False







	def __iter__(     self      :Optional[Any]			)		->      Dict:







				"""simple docstring"""






				return LinkedListIterator(self.head			)







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







				"""simple docstring"""






				if self.head:
							return self.head.get_data()
				return None







	def  snake_case__     (     self      :str			)		->      Optional[int]:







				"""simple docstring"""






				if self.tail:
							return self.tail.get_data()
				return None







	def  snake_case__     (     self      :Union[str, Any]   ,     lowercase      :Node			)		->      None:







				"""simple docstring"""






				if self.head is None:
							SCREAMING_SNAKE_CASE     						= node
							SCREAMING_SNAKE_CASE     						= node
				else:
							self.insert_before_node(self.head   ,     lowercase			)







	def  snake_case__     (     self      :List[Any]   ,     lowercase      :Node			)		->      None:







				"""simple docstring"""






				if self.head is None:
							self.set_head(lowercase			)
				else:
							self.insert_after_node(self.tail   ,     lowercase			)







	def  snake_case__     (     self      :Union[str, Any]   ,     lowercase      :int			)		->      None:







				"""simple docstring"""






				SCREAMING_SNAKE_CASE     						= Node(lowercase			)
				if self.head is None:
							self.set_head(lowercase			)
				else:
							self.set_tail(lowercase			)







	def  snake_case__     (     self      :Any   ,     lowercase      :Node   ,     lowercase      :Node			)		->      None:







				"""simple docstring"""






				SCREAMING_SNAKE_CASE     						= node
				SCREAMING_SNAKE_CASE     						= node.previous

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

				SCREAMING_SNAKE_CASE     						= node_to_insert







	def  snake_case__     (     self      :Dict   ,     lowercase      :Node   ,     lowercase      :Node			)		->      None:







				"""simple docstring"""






				SCREAMING_SNAKE_CASE     						= node
				SCREAMING_SNAKE_CASE     						= node.next

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

				SCREAMING_SNAKE_CASE     						= node_to_insert







	def  snake_case__     (     self      :Optional[Any]   ,     lowercase      :int   ,     lowercase      :int			)		->      None:







				"""simple docstring"""






				SCREAMING_SNAKE_CASE     						= 1
				SCREAMING_SNAKE_CASE     						= Node(lowercase			)
				SCREAMING_SNAKE_CASE     						= self.head
				while node:
							if current_position == position:
										self.insert_before_node(lowercase   ,     lowercase			)
										return
							current_position += 1
							SCREAMING_SNAKE_CASE     						= node.next
				self.insert_after_node(self.tail   ,     lowercase			)







	def  snake_case__     (     self      :Any   ,     lowercase      :int			)		->      Node:







				"""simple docstring"""






				SCREAMING_SNAKE_CASE     						= self.head
				while node:
							if node.get_data() == item:
										return node
							SCREAMING_SNAKE_CASE     						= node.get_next()
				raise Exception('''Node not found'''			)







	def  snake_case__     (     self      :List[Any]   ,     lowercase      :Union[str, Any]			)		->      Dict:







				"""simple docstring"""






				if (node := self.get_node(lowercase			)) is not None:
							if node == self.head:
										SCREAMING_SNAKE_CASE     						= self.head.get_next()

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

							self.remove_node_pointers(lowercase			)







	@staticmethod
	def  snake_case__     (     lowercase      :Node			)		->      None:







				"""simple docstring"""






				if node.get_next():
							SCREAMING_SNAKE_CASE     						= node.previous

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

				SCREAMING_SNAKE_CASE     						= None
				SCREAMING_SNAKE_CASE     						= None







	def  snake_case__     (     self      :str			)		->      Tuple:







				"""simple docstring"""






				return self.head is None



def    a      ( )     ->None:




			'''simple docstring'''




if __name__ == "__main__":
							import doctest

							doctest.testmod()

import tempfile
import unittest

from transformers import AutoModelForSeqaSeqLM, AutoTokenizer
from transformers.testing_utils import (
    is_torch_available,
    require_optimum,
    require_torch,
    slow,
)


if is_torch_available():
							import torch





@require_torch
@require_optimum
@slow
class     lowerCamelCase      (       unittest.TestCase					):







	def  snake_case__     (     self      :List[Any]			)		->      Optional[Any]:







				"""simple docstring"""






				SCREAMING_SNAKE_CASE     						= '''hf-internal-testing/tiny-random-t5'''
				SCREAMING_SNAKE_CASE     						= AutoTokenizer.from_pretrained(lowercase			)
				SCREAMING_SNAKE_CASE     						= AutoModelForSeqaSeqLM.from_pretrained(lowercase			)

				SCREAMING_SNAKE_CASE     						= tokenizer('''This is me'''   ,     return_tensors='''pt'''			)

				SCREAMING_SNAKE_CASE     						= model.to_bettertransformer()

				self.assertTrue(any('''BetterTransformer''' in mod.__class__.__name__ for _, mod in model.named_modules()			)			)

				SCREAMING_SNAKE_CASE     						= model.generate(**lowercase			)

				SCREAMING_SNAKE_CASE     						= model.reverse_bettertransformer()

				self.assertFalse(any('''BetterTransformer''' in mod.__class__.__name__ for _, mod in model.named_modules()			)			)

				with tempfile.TemporaryDirectory() as tmpdirname:
							model.save_pretrained(lowercase			)

							SCREAMING_SNAKE_CASE     						= AutoModelForSeqaSeqLM.from_pretrained(lowercase			)

							self.assertFalse(
							    any('''BetterTransformer''' in mod.__class__.__name__ for _, mod in model_reloaded.named_modules()			)			)

							SCREAMING_SNAKE_CASE     						= model_reloaded.generate(**lowercase			)
							self.assertTrue(torch.allclose(lowercase   ,     lowercase			)			)







	def  snake_case__     (     self      :Union[str, Any]			)		->      Optional[int]:







				"""simple docstring"""






				SCREAMING_SNAKE_CASE     						= '''hf-internal-testing/tiny-random-t5'''
				SCREAMING_SNAKE_CASE     						= AutoModelForSeqaSeqLM.from_pretrained(lowercase			)

				SCREAMING_SNAKE_CASE     						= model.to_bettertransformer()

				with tempfile.TemporaryDirectory() as tmpdirname:
							with self.assertRaises(lowercase			):
										model.save_pretrained(lowercase			)

							SCREAMING_SNAKE_CASE     						= model.reverse_bettertransformer()
							model.save_pretrained(lowercase			)