





from typing import Any


class       __SCREAMING_SNAKE_CASE	:



     '''simple docstring'''






     def __init__(					self						,   lowerCamelCase	):
       _snake_case     		=				data
       _snake_case     		=				None






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







class       __SCREAMING_SNAKE_CASE	:



     '''simple docstring'''






     def __init__(					self	):
       _snake_case     		=				None

     def __iter__(					self	):
       _snake_case     		=				self.head
       while node:
         yield node.data
         _snake_case     		=				node.next

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

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

     def __getitem__(					self						,   lowerCamelCase	):
       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						,   lowerCamelCase						,   lowerCamelCase	):
       if not 0 <= index < len(self	):
         raise ValueError("list index out of range."	)
       _snake_case     		=				self.head
       for _ in range(lowerCAmelCase__	):
         _snake_case     		=				current.next
       _snake_case     		=				data

     def 	UpperCamelCase(					self						,   lowerCamelCase	):
       self.insert_nth(len(self	)						,   lowerCAmelCase__	)

     def 	UpperCamelCase(					self						,   lowerCamelCase	):
       self.insert_nth(0						,   lowerCAmelCase__	)

     def 	UpperCamelCase(					self						,   lowerCamelCase						,   lowerCamelCase	):
       if not 0 <= index <= len(self	):
         raise IndexError("list index out of range"	)
       _snake_case     		=				Node(lowerCAmelCase__	)
       if self.head is None:
         _snake_case     		=				new_node
       elif index == 0:
         _snake_case     		=				self.head  # link new_node to head
         _snake_case     		=				new_node
       else:
         _snake_case     		=				self.head
         for _ in range(index - 1	):
           _snake_case     		=				temp.next
         _snake_case     		=				temp.next
         _snake_case     		=				new_node

     def 	UpperCamelCase(					self	):  # print every node data
       print(self	)

     def 	UpperCamelCase(					self	):
       return self.delete_nth(0	)

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

     def 	UpperCamelCase(					self						,   lowerCamelCase = 0	):
       if not 0 <= index <= len(self	) - 1:  # test if index is valid
         raise IndexError("List index out of range."	)
       _snake_case     		=				self.head  # default first node
       if index == 0:
         _snake_case     		=				self.head.next
       else:
         _snake_case     		=				self.head
         for _ in range(index - 1	):
           _snake_case     		=				temp.next
         _snake_case     		=				temp.next
         _snake_case     		=				temp.next.next
       return delete_node.data

     def 	UpperCamelCase(					self	):
       return self.head is None






     def 	UpperCamelCase(					self	):
       _snake_case     		=				None
       _snake_case     		=				self.head

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







def 				snake_case_      (		):







  '''simple docstring'''



  _snake_case     		=				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       ):
    _snake_case     		=				-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 				snake_case_      (		):







  '''simple docstring'''



  _snake_case     		=				[
      -9,
      1_00,
      Node(77_34_51_12       ),
      "dlrow olleH",
      7,
      55_55,
      0,
      -192.55555,
      "Hello, world!",
      77.9,
      Node(10       ),
      None,
      None,
      12.20,
  ]
  _snake_case     		=				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
  _snake_case     		=				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
  _snake_case     		=				linked_list.delete_tail()
  assert result == 12.2
  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
  _snake_case     		=				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 				snake_case_      (		):







  '''simple docstring'''



  from doctest import testmod

  testmod()

  _snake_case     		=				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]}'''       )
  _snake_case     		=				input("Enter New Value: "       ).strip()
  print("New list:"       )
  print(__A       )
  print(f'''length of linked_list is : {len(__A       )}'''       )


if __name__ == "__main__":
 main()









'''simple docstring'''



import itertools
import json
import os
import unittest

from transformers import AddedToken, LongformerTokenizer, LongformerTokenizerFast
from transformers.models.longformer.tokenization_longformer import VOCAB_FILES_NAMES
from transformers.testing_utils import require_tokenizers, slow

from ...test_tokenization_common import TokenizerTesterMixin


@require_tokenizers
class       __SCREAMING_SNAKE_CASE	(						__UpperCamelCase					,    unittest.TestCase			):



     '''simple docstring'''






     UpperCAmelCase__       :						List[Any]      =   LongformerTokenizer
     UpperCAmelCase__       :						Dict      =   True
     UpperCAmelCase__       :						Union[str, Any]      =   LongformerTokenizerFast
     UpperCAmelCase__       :						List[str]      =   True

     def 	UpperCamelCase(					self	):
       super().setUp()

       # Adapted from Sennrich et al. 2015 and https://github.com/rsennrich/subword-nmt
       _snake_case     		=				[
           "l",
           "o",
           "w",
           "e",
           "r",
           "s",
           "t",
           "i",
           "d",
           "n",
           "\u0120",
           "\u0120l",
           "\u0120n",
           "\u0120lo",
           "\u0120low",
           "er",
           "\u0120lowest",
           "\u0120newer",
           "\u0120wider",
           "<unk>",
       ]
       _snake_case     		=				dict(zip(lowerCamelCase						,   range(len(lowerCamelCase	)	)	)	)
       _snake_case     		=				["#version: 0.2", "\u0120 l", "\u0120l o", "\u0120lo w", "e r", ""]
       _snake_case     		=				{"unk_token": "<unk>"}

       _snake_case     		=				os.path.join(self.tmpdirname						,   VOCAB_FILES_NAMES["vocab_file"]	)
       _snake_case     		=				os.path.join(self.tmpdirname						,   VOCAB_FILES_NAMES["merges_file"]	)
       with open(self.vocab_file						,   "w"						,   encoding="utf-8"	) as fp:
         fp.write(json.dumps(lowerCamelCase	) + "\n"	)
       with open(self.merges_file						,   "w"						,   encoding="utf-8"	) as fp:
         fp.write("\n".join(lowerCamelCase	)	)

     def 	UpperCamelCase(					self						,   **lowerCamelCase	):
       kwargs.update(self.special_tokens_map	)
       return self.tokenizer_class.from_pretrained(self.tmpdirname						,   **lowerCamelCase	)

     def 	UpperCamelCase(					self						,   **lowerCamelCase	):
       kwargs.update(self.special_tokens_map	)
       return self.rust_tokenizer_class.from_pretrained(self.tmpdirname						,   **lowerCamelCase	)

     def 	UpperCamelCase(					self						,   lowerCamelCase	):
       _snake_case     		=				"lower newer"
       _snake_case     		=				"lower newer"
       return input_text, output_text

     def 	UpperCamelCase(					self	):
       _snake_case     		=				self.tokenizer_class(self.vocab_file						,   self.merges_file						,   **self.special_tokens_map	)
       _snake_case     		=				"lower newer"
       _snake_case     		=				["l", "o", "w", "er", "\u0120", "n", "e", "w", "er"]
       _snake_case     		=				tokenizer.tokenize(lowerCamelCase	)  # , add_prefix_space=True)
       self.assertListEqual(lowerCamelCase						,   lowerCamelCase	)

       _snake_case     		=				tokens + [tokenizer.unk_token]
       _snake_case     		=				[0, 1, 2, 15, 10, 9, 3, 2, 15, 19]
       self.assertListEqual(tokenizer.convert_tokens_to_ids(lowerCamelCase	)						,   lowerCamelCase	)

     def 	UpperCamelCase(					self	):
       _snake_case     		=				self.get_tokenizer()

       self.assertListEqual(tokenizer.encode("Hello world!"						,   add_special_tokens=lowerCamelCase	)						,   [0, 31_414, 232, 328, 2]	)
       self.assertListEqual(
           tokenizer.encode("Hello world! cécé herlolip 418"						,   add_special_tokens=lowerCamelCase	)						,   [0, 31_414, 232, 328, 740, 1_140, 12_695, 69, 46_078, 1_588, 2]						,   )

     @slow
     def 	UpperCamelCase(					self	):
       _snake_case     		=				self.tokenizer_class.from_pretrained("allenai/longformer-base-4096"	)

       _snake_case     		=				tokenizer.encode("sequence builders"						,   add_special_tokens=lowerCamelCase	)
       _snake_case     		=				tokenizer.encode("multi-sequence build"						,   add_special_tokens=lowerCamelCase	)

       _snake_case     		=				tokenizer.encode(
           "sequence builders"						,   add_special_tokens=lowerCamelCase						,   add_prefix_space=lowerCamelCase	)
       _snake_case     		=				tokenizer.encode(
           "sequence builders"						,   "multi-sequence build"						,   add_special_tokens=lowerCamelCase						,   add_prefix_space=lowerCamelCase	)

       _snake_case     		=				tokenizer.build_inputs_with_special_tokens(lowerCamelCase	)
       _snake_case     		=				tokenizer.build_inputs_with_special_tokens(lowerCamelCase						,   lowerCamelCase	)

       assert encoded_sentence == encoded_text_from_decode
       assert encoded_pair == encoded_pair_from_decode

     def 	UpperCamelCase(					self	):
       _snake_case     		=				self.get_tokenizer()

       _snake_case     		=				"Encode this sequence."
       _snake_case     		=				tokenizer.byte_encoder[" ".encode("utf-8"	)[0]]

       # Testing encoder arguments
       _snake_case     		=				tokenizer.encode(lowerCamelCase						,   add_special_tokens=lowerCamelCase						,   add_prefix_space=lowerCamelCase	)
       _snake_case     		=				tokenizer.convert_ids_to_tokens(encoded[0]	)[0]
       self.assertNotEqual(lowerCamelCase						,   lowerCamelCase	)

       _snake_case     		=				tokenizer.encode(lowerCamelCase						,   add_special_tokens=lowerCamelCase						,   add_prefix_space=lowerCamelCase	)
       _snake_case     		=				tokenizer.convert_ids_to_tokens(encoded[0]	)[0]
       self.assertEqual(lowerCamelCase						,   lowerCamelCase	)

       tokenizer.add_special_tokens({"bos_token": "<s>"}	)
       _snake_case     		=				tokenizer.encode(lowerCamelCase						,   add_special_tokens=lowerCamelCase	)
       _snake_case     		=				tokenizer.convert_ids_to_tokens(encoded[1]	)[0]
       self.assertNotEqual(lowerCamelCase						,   lowerCamelCase	)

       # Testing spaces after special tokens
       _snake_case     		=				"<mask>"
       tokenizer.add_special_tokens(
           {"mask_token": AddedToken(lowerCamelCase						,   lstrip=lowerCamelCase						,   rstrip=lowerCamelCase	)}	)  # mask token has a left space
       _snake_case     		=				tokenizer.convert_tokens_to_ids(lowerCamelCase	)

       _snake_case     		=				"Encode <mask> sequence"
       _snake_case     		=				"Encode <mask>sequence"

       _snake_case     		=				tokenizer.encode(lowerCamelCase	)
       _snake_case     		=				encoded.index(lowerCamelCase	)
       _snake_case     		=				tokenizer.convert_ids_to_tokens(encoded[mask_loc + 1]	)[0]
       self.assertEqual(lowerCamelCase						,   lowerCamelCase	)

       _snake_case     		=				tokenizer.encode(lowerCamelCase	)
       _snake_case     		=				encoded.index(lowerCamelCase	)
       _snake_case     		=				tokenizer.convert_ids_to_tokens(encoded[mask_loc + 1]	)[0]
       self.assertNotEqual(lowerCamelCase						,   lowerCamelCase	)

     def 	UpperCamelCase(					self	):
       pass

     def 	UpperCamelCase(					self	):
       for tokenizer, pretrained_name, kwargs in self.tokenizers_list:
         with self.subTest(F'''{tokenizer.__class__.__name__} ({pretrained_name})'''	):
           _snake_case     		=				self.rust_tokenizer_class.from_pretrained(lowerCamelCase						,   **lowerCamelCase	)
           _snake_case     		=				self.tokenizer_class.from_pretrained(lowerCamelCase						,   **lowerCamelCase	)
           _snake_case     		=				"A, <mask> AllenNLP sentence."
           _snake_case     		=				tokenizer_r.encode_plus(lowerCamelCase						,   add_special_tokens=lowerCamelCase						,   return_token_type_ids=lowerCamelCase	)
           _snake_case     		=				tokenizer_p.encode_plus(lowerCamelCase						,   add_special_tokens=lowerCamelCase						,   return_token_type_ids=lowerCamelCase	)

           # token_type_ids should put 0 everywhere
           self.assertEqual(sum(tokens_r["token_type_ids"]	)						,   sum(tokens_p["token_type_ids"]	)	)

           # attention_mask should put 1 everywhere, so sum over length should be 1
           self.assertEqual(
               sum(tokens_r["attention_mask"]	) / len(tokens_r["attention_mask"]	)						,   sum(tokens_p["attention_mask"]	) / len(tokens_p["attention_mask"]	)						,   )

           _snake_case     		=				tokenizer_r.convert_ids_to_tokens(tokens_r["input_ids"]	)
           _snake_case     		=				tokenizer_p.convert_ids_to_tokens(tokens_p["input_ids"]	)

           # Rust correctly handles the space before the mask while python doesnt
           self.assertSequenceEqual(tokens_p["input_ids"]						,   [0, 250, 6, 50_264, 3_823, 487, 21_992, 3_645, 4, 2]	)
           self.assertSequenceEqual(tokens_r["input_ids"]						,   [0, 250, 6, 50_264, 3_823, 487, 21_992, 3_645, 4, 2]	)

           self.assertSequenceEqual(
               lowerCamelCase						,   ["<s>", "A", ",", "<mask>", "ĠAllen", "N", "LP", "Ġsentence", ".", "</s>"]	)
           self.assertSequenceEqual(
               lowerCamelCase						,   ["<s>", "A", ",", "<mask>", "ĠAllen", "N", "LP", "Ġsentence", ".", "</s>"]	)

     def 	UpperCamelCase(					self	):
       for trim_offsets, add_prefix_space in itertools.product([True, False]						,   repeat=2	):
         _snake_case     		=				self.rust_tokenizer_class.from_pretrained(
             self.tmpdirname						,   use_fast=lowerCamelCase						,   add_prefix_space=lowerCamelCase						,   trim_offsets=lowerCamelCase	)

         _snake_case     		=				json.loads(tokenizer_r.backend_tokenizer.pre_tokenizer.__getstate__()	)
         _snake_case     		=				json.loads(tokenizer_r.backend_tokenizer.post_processor.__getstate__()	)

         self.assertEqual(pre_tokenizer_state["add_prefix_space"]						,   lowerCamelCase	)

         self.assertEqual(post_processor_state["add_prefix_space"]						,   lowerCamelCase	)
         self.assertEqual(post_processor_state["trim_offsets"]						,   lowerCamelCase	)






     def 	UpperCamelCase(					self	):
       # Test which aims to verify that the offsets are well adapted to the argument `add_prefix_space` and
       # `trim_offsets`
       for tokenizer, pretrained_name, kwargs in self.tokenizers_list:
         with self.subTest(F'''{tokenizer.__class__.__name__} ({pretrained_name})'''	):
           _snake_case     		=				"hello"  # `hello` is a token in the vocabulary of `pretrained_name`
           _snake_case     		=				F'''{text_of_1_token} {text_of_1_token}'''

           _snake_case     		=				self.rust_tokenizer_class.from_pretrained(
               lowerCamelCase						,   use_fast=lowerCamelCase						,   add_prefix_space=lowerCamelCase						,   trim_offsets=lowerCamelCase	)
           _snake_case     		=				tokenizer_r(lowerCamelCase						,   return_offsets_mapping=lowerCamelCase						,   add_special_tokens=lowerCamelCase	)
           self.assertEqual(encoding.offset_mapping[0]						,   (0, len(lowerCamelCase	))	)
           self.assertEqual(
               encoding.offset_mapping[1]						,   (len(lowerCamelCase	) + 1, len(lowerCamelCase	) + 1 + len(lowerCamelCase	))						,   )

           _snake_case     		=				self.rust_tokenizer_class.from_pretrained(
               lowerCamelCase						,   use_fast=lowerCamelCase						,   add_prefix_space=lowerCamelCase						,   trim_offsets=lowerCamelCase	)
           _snake_case     		=				tokenizer_r(lowerCamelCase						,   return_offsets_mapping=lowerCamelCase						,   add_special_tokens=lowerCamelCase	)
           self.assertEqual(encoding.offset_mapping[0]						,   (0, len(lowerCamelCase	))	)
           self.assertEqual(
               encoding.offset_mapping[1]						,   (len(lowerCamelCase	) + 1, len(lowerCamelCase	) + 1 + len(lowerCamelCase	))						,   )

           _snake_case     		=				self.rust_tokenizer_class.from_pretrained(
               lowerCamelCase						,   use_fast=lowerCamelCase						,   add_prefix_space=lowerCamelCase						,   trim_offsets=lowerCamelCase	)
           _snake_case     		=				tokenizer_r(lowerCamelCase						,   return_offsets_mapping=lowerCamelCase						,   add_special_tokens=lowerCamelCase	)
           self.assertEqual(encoding.offset_mapping[0]						,   (0, len(lowerCamelCase	))	)
           self.assertEqual(
               encoding.offset_mapping[1]						,   (len(lowerCamelCase	), len(lowerCamelCase	) + 1 + len(lowerCamelCase	))						,   )

           _snake_case     		=				self.rust_tokenizer_class.from_pretrained(
               lowerCamelCase						,   use_fast=lowerCamelCase						,   add_prefix_space=lowerCamelCase						,   trim_offsets=lowerCamelCase	)
           _snake_case     		=				tokenizer_r(lowerCamelCase						,   return_offsets_mapping=lowerCamelCase						,   add_special_tokens=lowerCamelCase	)
           self.assertEqual(encoding.offset_mapping[0]						,   (0, len(lowerCamelCase	))	)
           self.assertEqual(
               encoding.offset_mapping[1]						,   (len(lowerCamelCase	), len(lowerCamelCase	) + 1 + len(lowerCamelCase	))						,   )

           _snake_case     		=				F''' {text}'''

           # tokenizer_r = self.rust_tokenizer_class.from_pretrained(
           #     pretrained_name, use_fast=True, add_prefix_space=True, trim_offsets=True
           # )
           # encoding = tokenizer_r(text, return_offsets_mapping=True, add_special_tokens=False)
           # self.assertEqual(encoding.offset_mapping[0], (1, 1 + len(text_of_1_token)))
           # self.assertEqual(
           #     encoding.offset_mapping[1],
           #     (1 + len(text_of_1_token) + 1, 1 + len(text_of_1_token) + 1 + len(text_of_1_token)),
           # )

           _snake_case     		=				self.rust_tokenizer_class.from_pretrained(
               lowerCamelCase						,   use_fast=lowerCamelCase						,   add_prefix_space=lowerCamelCase						,   trim_offsets=lowerCamelCase	)
           _snake_case     		=				tokenizer_r(lowerCamelCase						,   return_offsets_mapping=lowerCamelCase						,   add_special_tokens=lowerCamelCase	)
           self.assertEqual(encoding.offset_mapping[0]						,   (1, 1 + len(lowerCamelCase	))	)
           self.assertEqual(
               encoding.offset_mapping[1]						,   (1 + len(lowerCamelCase	) + 1, 1 + len(lowerCamelCase	) + 1 + len(lowerCamelCase	))						,   )

           _snake_case     		=				self.rust_tokenizer_class.from_pretrained(
               lowerCamelCase						,   use_fast=lowerCamelCase						,   add_prefix_space=lowerCamelCase						,   trim_offsets=lowerCamelCase	)
           _snake_case     		=				tokenizer_r(lowerCamelCase						,   return_offsets_mapping=lowerCamelCase						,   add_special_tokens=lowerCamelCase	)
           self.assertEqual(encoding.offset_mapping[0]						,   (0, 1 + len(lowerCamelCase	))	)
           self.assertEqual(
               encoding.offset_mapping[1]						,   (1 + len(lowerCamelCase	), 1 + len(lowerCamelCase	) + 1 + len(lowerCamelCase	))						,   )

           _snake_case     		=				self.rust_tokenizer_class.from_pretrained(
               lowerCamelCase						,   use_fast=lowerCamelCase						,   add_prefix_space=lowerCamelCase						,   trim_offsets=lowerCamelCase	)
           _snake_case     		=				tokenizer_r(lowerCamelCase						,   return_offsets_mapping=lowerCamelCase						,   add_special_tokens=lowerCamelCase	)
           self.assertEqual(encoding.offset_mapping[0]						,   (0, 1 + len(lowerCamelCase	))	)
           self.assertEqual(
               encoding.offset_mapping[1]						,   (1 + len(lowerCamelCase	), 1 + len(lowerCamelCase	) + 1 + len(lowerCamelCase	))						,   )


