



'''simple docstring'''





from typing import Any






class 	lowerCAmelCase_:
  '''simple docstring'''




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






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







class 	lowerCAmelCase_:
  '''simple docstring'''




  def __init__(   self				)   ->		List[Any]:
      lowerCAmelCase__			:  List[str]											= None




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




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




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




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




  def 							UpperCAmelCase_     (   self  ,__UpperCAmelCase				)   ->		None:
      self.insert_nth(len(self				)  ,__UpperCAmelCase				)




  def 							UpperCAmelCase_     (   self  ,__UpperCAmelCase				)   ->		None:
      self.insert_nth(0  ,__UpperCAmelCase				)




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




  def 							UpperCAmelCase_     (   self				)   ->		None:  # print every node data
      print(self				)




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




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




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




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






  def 							UpperCAmelCase_     (   self				)   ->		None:
      lowerCAmelCase__			:  Optional[int]											= None
      lowerCAmelCase__			:  str											= self.head

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







def        _SCREAMING_SNAKE_CASE  (	):



    """simple docstring"""





    lowerCAmelCase__			:  Dict											= LinkedList()
    assert linked_list.is_empty() is True
    assert str(UpperCamelCase      ) == ""

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

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

    linked_list.reverse()
    assert str(UpperCamelCase      ) == "->".join(str(UpperCamelCase      ) for i in range(-8							,   1      )      )
def        _SCREAMING_SNAKE_CASE  (	):



    """simple docstring"""





    lowerCAmelCase__			:  Any											= [
        -9,
        100,
        Node(77345112      ),
        """dlrow olleH""",
        7,
        5555,
        0,
        -192.5_5555,
        """Hello, world!""",
        77.9,
        Node(10      ),
        None,
        None,
        12.20,
    ]
    lowerCAmelCase__			:  List[Any]											= LinkedList()

    for i in test_input:
        linked_list.insert_tail(UpperCamelCase      )

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

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

    # Delete the tail
    lowerCAmelCase__			:  Union[str, Any]											= linked_list.delete_tail()
    assert result == 12.2
    assert (
        str(UpperCamelCase      ) == "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
    lowerCAmelCase__			:  str											= linked_list.delete_nth(10      )
    assert result is None
    assert (
        str(UpperCamelCase      ) == "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(UpperCamelCase      )
        == "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(UpperCamelCase      )
    assert (
        str(UpperCamelCase      )
        == "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(UpperCamelCase      )
        == "None->None->Node(10)->77.9->Hello, world!->-192.55555->0->5555->"
        "7->dlrow olleH->Node(77345112)->100->Node(Hello again, world!)"
    )
def        _SCREAMING_SNAKE_CASE  (	):



    """simple docstring"""





    from doctest import testmod

    testmod()

    lowerCAmelCase__			:  str											= 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(UpperCamelCase      )
    print("""\nReading/changing Node data using indexing:"""      )
    print(f"""Element at Position 1: {linked_list[1]}"""      )
    lowerCAmelCase__			:  Dict											= input("""Enter New Value: """      ).strip()
    print("""New list:"""      )
    print(UpperCamelCase      )
    print(f"""length of linked_list is : {len(UpperCamelCase      )}"""      )


if __name__ == "__main__":
 main()







'''simple docstring'''





import json
import os
import shutil
import tempfile
from unittest import TestCase

from transformers import BartTokenizer, BartTokenizerFast, DPRQuestionEncoderTokenizer, DPRQuestionEncoderTokenizerFast
from transformers.models.bart.configuration_bart import BartConfig
from transformers.models.bert.tokenization_bert import VOCAB_FILES_NAMES as DPR_VOCAB_FILES_NAMES
from transformers.models.dpr.configuration_dpr import DPRConfig
from transformers.models.roberta.tokenization_roberta import VOCAB_FILES_NAMES as BART_VOCAB_FILES_NAMES
from transformers.testing_utils import require_faiss, require_tokenizers, require_torch, slow
from transformers.utils import is_datasets_available, is_faiss_available, is_torch_available


if is_torch_available() and is_datasets_available() and is_faiss_available():
 from transformers.models.rag.configuration_rag import RagConfig
 from transformers.models.rag.tokenization_rag import RagTokenizer






@require_faiss
@require_torch
class 	lowerCAmelCase_(    SCREAMING_SNAKE_CASE_					):
  '''simple docstring'''




  def 							UpperCAmelCase_     (   self				)   ->		Dict:
      lowerCAmelCase__			:  str											= tempfile.mkdtemp()
      lowerCAmelCase__			:  List[Any]											= 8

      # DPR tok
      lowerCAmelCase__			:  int											= [
          """[UNK]""",
          """[CLS]""",
          """[SEP]""",
          """[PAD]""",
          """[MASK]""",
          """want""",
          """##want""",
          """##ed""",
          """wa""",
          """un""",
          """runn""",
          """##ing""",
          """,""",
          """low""",
          """lowest""",
      ]
      lowerCAmelCase__			:  List[Any]											= os.path.join(self.tmpdirname  ,"""dpr_tokenizer"""				)
      os.makedirs(__UpperCAmelCase  ,exist_ok=__UpperCAmelCase				)
      lowerCAmelCase__			:  Dict											= os.path.join(__UpperCAmelCase  ,DPR_VOCAB_FILES_NAMES["""vocab_file"""]				)
      with open(self.vocab_file  ,"""w"""  ,encoding="""utf-8"""				) as vocab_writer:
          vocab_writer.write("""""".join([x + """\n""" for x in vocab_tokens]				)				)

      # BART tok
      lowerCAmelCase__			:  str											= [
          """l""",
          """o""",
          """w""",
          """e""",
          """r""",
          """s""",
          """t""",
          """i""",
          """d""",
          """n""",
          """\u0120""",
          """\u0120l""",
          """\u0120n""",
          """\u0120lo""",
          """\u0120low""",
          """er""",
          """\u0120lowest""",
          """\u0120newer""",
          """\u0120wider""",
          """<unk>""",
      ]
      lowerCAmelCase__			:  List[Any]											= dict(zip(__UpperCAmelCase  ,range(len(__UpperCAmelCase				)				)				)				)
      lowerCAmelCase__			:  Optional[Any]											= ["""#version: 0.2""", """\u0120 l""", """\u0120l o""", """\u0120lo w""", """e r""", """"""]
      lowerCAmelCase__			:  Any											= {"""unk_token""": """<unk>"""}

      lowerCAmelCase__			:  str											= os.path.join(self.tmpdirname  ,"""bart_tokenizer"""				)
      os.makedirs(__UpperCAmelCase  ,exist_ok=__UpperCAmelCase				)
      lowerCAmelCase__			:  Any											= os.path.join(__UpperCAmelCase  ,BART_VOCAB_FILES_NAMES["""vocab_file"""]				)
      lowerCAmelCase__			:  Dict											= os.path.join(__UpperCAmelCase  ,BART_VOCAB_FILES_NAMES["""merges_file"""]				)
      with open(self.vocab_file  ,"""w"""  ,encoding="""utf-8"""				) as fp:
          fp.write(json.dumps(__UpperCAmelCase				) + """\n"""				)
      with open(self.merges_file  ,"""w"""  ,encoding="""utf-8"""				) as fp:
          fp.write("""\n""".join(__UpperCAmelCase				)				)




  def 							UpperCAmelCase_     (   self				)   ->		DPRQuestionEncoderTokenizer:
      return DPRQuestionEncoderTokenizer.from_pretrained(os.path.join(self.tmpdirname  ,"""dpr_tokenizer"""				)				)




  def 							UpperCAmelCase_     (   self				)   ->		BartTokenizer:
      return BartTokenizer.from_pretrained(os.path.join(self.tmpdirname  ,"""bart_tokenizer"""				)				)




  def 							UpperCAmelCase_     (   self				)   ->		Any:
      shutil.rmtree(self.tmpdirname				)




  @require_tokenizers
  def 							UpperCAmelCase_     (   self				)   ->		int:
      lowerCAmelCase__			:  Any											= os.path.join(self.tmpdirname  ,"""rag_tokenizer"""				)
      lowerCAmelCase__			:  Any											= RagConfig(question_encoder=DPRConfig().to_dict()  ,generator=BartConfig().to_dict()				)
      lowerCAmelCase__			:  str											= RagTokenizer(question_encoder=self.get_dpr_tokenizer()  ,generator=self.get_bart_tokenizer()				)
      rag_config.save_pretrained(__UpperCAmelCase				)
      rag_tokenizer.save_pretrained(__UpperCAmelCase				)
      lowerCAmelCase__			:  Any											= RagTokenizer.from_pretrained(__UpperCAmelCase  ,config=__UpperCAmelCase				)
      self.assertIsInstance(new_rag_tokenizer.question_encoder  ,__UpperCAmelCase				)
      self.assertEqual(new_rag_tokenizer.question_encoder.get_vocab()  ,rag_tokenizer.question_encoder.get_vocab()				)
      self.assertIsInstance(new_rag_tokenizer.generator  ,__UpperCAmelCase				)
      self.assertEqual(new_rag_tokenizer.generator.get_vocab()  ,rag_tokenizer.generator.get_vocab()				)




  @slow
  def 							UpperCAmelCase_     (   self				)   ->		Union[str, Any]:
      lowerCAmelCase__			:  List[str]											= RagTokenizer.from_pretrained("""facebook/rag-token-nq"""				)
      lowerCAmelCase__			:  Optional[Any]											= [
          """who got the first nobel prize in physics""",
          """when is the next deadpool movie being released""",
          """which mode is used for short wave broadcast service""",
          """who is the owner of reading football club""",
          """when is the next scandal episode coming out""",
          """when is the last time the philadelphia won the superbowl""",
          """what is the most current adobe flash player version""",
          """how many episodes are there in dragon ball z""",
          """what is the first step in the evolution of the eye""",
          """where is gall bladder situated in human body""",
          """what is the main mineral in lithium batteries""",
          """who is the president of usa right now""",
          """where do the greasers live in the outsiders""",
          """panda is a national animal of which country""",
          """what is the name of manchester united stadium""",
      ]
      lowerCAmelCase__			:  Dict											= tokenizer(__UpperCAmelCase				)
      self.assertIsNotNone(__UpperCAmelCase				)






  @slow
  def 							UpperCAmelCase_     (   self				)   ->		Union[str, Any]:
      lowerCAmelCase__			:  str											= RagTokenizer.from_pretrained("""facebook/rag-sequence-nq"""				)
      lowerCAmelCase__			:  str											= [
          """who got the first nobel prize in physics""",
          """when is the next deadpool movie being released""",
          """which mode is used for short wave broadcast service""",
          """who is the owner of reading football club""",
          """when is the next scandal episode coming out""",
          """when is the last time the philadelphia won the superbowl""",
          """what is the most current adobe flash player version""",
          """how many episodes are there in dragon ball z""",
          """what is the first step in the evolution of the eye""",
          """where is gall bladder situated in human body""",
          """what is the main mineral in lithium batteries""",
          """who is the president of usa right now""",
          """where do the greasers live in the outsiders""",
          """panda is a national animal of which country""",
          """what is the name of manchester united stadium""",
      ]
      lowerCAmelCase__			:  Tuple											= tokenizer(__UpperCAmelCase				)
      self.assertIsNotNone(__UpperCAmelCase				)


