






"""simple docstring"""







from typing import Dict, List, Optional, Tuple

from ...tokenization_utils import AddedToken, PreTrainedTokenizer
from ...utils import logging


_UpperCamelCase     			=  logging.get_logger(__name__)







class 					lowerCamelCase__					(       snake_case ):
    SCREAMING_SNAKE_CASE		=			['''input_ids''', '''attention_mask''']






    def __init__( self	,A="[PAD]"	,A="[BOS]"	,A="[EOS]"	,A="[MASK]"	,A="[CLS]"	,A="[SEP]"	,A=2_048	,**A	,):
          UpperCAmelCase							=       AddedToken(A	,lstrip=A	,rstrip=A					) if isinstance(A	,A					) else pad_token
          UpperCAmelCase							=       AddedToken(A	,lstrip=A	,rstrip=A					) if isinstance(A	,A					) else bos_token
          UpperCAmelCase							=       AddedToken(A	,lstrip=A	,rstrip=A					) if isinstance(A	,A					) else eos_token
          UpperCAmelCase							=       AddedToken(A	,lstrip=A	,rstrip=A					) if isinstance(A	,A					) else mask_token
          UpperCAmelCase							=       AddedToken(A	,lstrip=A	,rstrip=A					) if isinstance(A	,A					) else cls_token
          UpperCAmelCase							=       AddedToken(A	,lstrip=A	,rstrip=A					) if isinstance(A	,A					) else sep_token

          super().__init__(
              pad_token=A	,bos_token=A	,eos_token=A	,mask_token=A	,cls_token=A	,sep_token=A	,model_max_length=A	,**A	,)

          UpperCAmelCase							=       2**8  # utf is 8 bits

          # define special tokens dict
          UpperCAmelCase							=       {
              self.pad_token: 0,
              self.bos_token: 1,
              self.eos_token: 2,
              self.mask_token: 3,
              self.cls_token: 4,
              self.sep_token: 5,
          }
          UpperCAmelCase							=       len(self.special_tokens_encoder					)
          UpperCAmelCase							=       {v: k for k, v in self.special_tokens_encoder.items()}






    def 				_UpperCamelCase							( self					):
          UpperCAmelCase							=       self.special_tokens_encoder.copy()
          vocab.update(self.added_tokens_encoder					)
          for i in range(self._utf_vocab_size					):
                UpperCAmelCase							=       chr(A					)
                UpperCAmelCase							=       i + len(self.special_tokens_encoder					)
          return vocab






    @property
    def 				_UpperCamelCase							( self					):
          return self._utf_vocab_size + self._num_special_tokens






    def 				_UpperCamelCase							( self	,A	,A = None	,A = False					):
          if already_has_special_tokens:
                return super().get_special_tokens_mask(
                    token_ids_a=A	,token_ids_a=A	,already_has_special_tokens=A					)

          # normal case: some special tokens
          if token_ids_a is None:
                return [1] + [0] * len(A					) + [1]
          return [1] + ([0] * len(A					)) + [1] + ([0] * len(A					)) + [1]






    def 				_UpperCamelCase							( self	,A	,A = None					):
          if token_ids_a is None:
                return [self.cls_token_id] + token_ids_a + [self.sep_token_id]
          else:
                return [self.cls_token_id] + token_ids_a + [self.sep_token_id] + token_ids_a + [self.sep_token_id]






    def 				_UpperCamelCase							( self	,A					):
          UpperCAmelCase							=       [chr(A					) for i in text.encode("""utf-8"""					)]
          return tokens






    def 				_UpperCamelCase							( self	,A					):
          if token in self.special_tokens_encoder:
                UpperCAmelCase							=       self.special_tokens_encoder[token]
          elif token in self.added_tokens_encoder:
                UpperCAmelCase							=       self.added_tokens_encoder[token]
          elif len(A					) != 1:
                UpperCAmelCase							=       self.unk_token_id
          else:
                UpperCAmelCase							=       ord(A					) + self._num_special_tokens
          return token_id






    def 				_UpperCamelCase							( self	,A					):
          if index in self.special_tokens_decoder:
                UpperCAmelCase							=       self.special_tokens_decoder[index]
          elif index in self.added_tokens_decoder:
                UpperCAmelCase							=       self.added_tokens_decoder[index]
          else:
                UpperCAmelCase							=       chr(index - self._num_special_tokens					)
          return token






    def 				_UpperCamelCase							( self	,A					):
          UpperCAmelCase							=       b""""""
          for token in tokens:
                if token in self.special_tokens_decoder:
                      UpperCAmelCase							=       self.special_tokens_decoder[token].encode("""utf-8"""					)
                elif token in self.added_tokens_decoder:
                      UpperCAmelCase							=       self.special_tokens_decoder[token].encode("""utf-8"""					)
                elif token in self.special_tokens_encoder:
                      UpperCAmelCase							=       token.encode("""utf-8"""					)
                elif token in self.added_tokens_encoder:
                      UpperCAmelCase							=       token.encode("""utf-8"""					)
                else:
                      UpperCAmelCase							=       bytes([ord(A					)]					)
                bstring += tok_string
          UpperCAmelCase							=       bstring.decode("""utf-8"""	,errors="""replace"""					)
          return string






    def 				_UpperCamelCase							( self	,A	,A = None					):
          return ()











"""simple docstring"""







from __future__ import annotations

from typing import Generic, TypeVar

_UpperCamelCase     			=  TypeVar("""T""")







class 					lowerCamelCase__					(       Generic[T] ):






    def __init__( self	,A					):
          UpperCAmelCase							=       data  # Assign data
          UpperCAmelCase							=       None  # Initialize next as null
          UpperCAmelCase							=       None  # Initialize prev as null







class 					lowerCamelCase__					(       Generic[T] ):






    def __init__( self					):
          UpperCAmelCase							=       None






    def 				_UpperCamelCase							( self	,A					):
          if self.head is None:
                UpperCAmelCase							=       Node(A					)
          else:
                UpperCAmelCase							=       Node(A					)
                UpperCAmelCase							=       new_node
                UpperCAmelCase							=       self.head
                UpperCAmelCase							=       None
                UpperCAmelCase							=       new_node






    def 				_UpperCamelCase							( self					):
          if self.head is None:
                return None
          else:
                assert self.head is not None
                UpperCAmelCase							=       self.head.data
                UpperCAmelCase							=       self.head.next
                if self.head is not None:
                      UpperCAmelCase							=       None
                return temp






    def 				_UpperCamelCase							( self					):
          return self.head.data if self.head is not None else None






    def __len__( self					):
          UpperCAmelCase							=       self.head
          UpperCAmelCase							=       0
          while temp is not None:
                count += 1
                UpperCAmelCase							=       temp.next
          return count






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






    def 				_UpperCamelCase							( self					):
          print("""stack elements are:"""					)
          UpperCAmelCase							=       self.head
          while temp is not None:
                print(temp.data	,end="""->"""					)
                UpperCAmelCase							=       temp.next


# Code execution starts here
if __name__ == "__main__":
  # Start with the empty stack
  _UpperCamelCase     			=  Stack()

  # Insert 4 at the beginning. So stack becomes 4->None
  print("""Stack operations using Doubly LinkedList""")
  stack.push(4)

  # Insert 5 at the beginning. So stack becomes 4->5->None
  stack.push(5)

  # Insert 6 at the beginning. So stack becomes 4->5->6->None
  stack.push(6)

  # Insert 7 at the beginning. So stack becomes 4->5->6->7->None
  stack.push(7)

  # Print the stack
  stack.print_stack()

  # Print the top element
  print("""\nTop element is """, stack.top())

  # Print the stack size
  print("""Size of the stack is """, len(stack))

  # pop the top element
  stack.pop()

  # pop the top element
  stack.pop()

  # two elements have now been popped off
  stack.print_stack()

  # Print True if the stack is empty else False
  print("""\nstack is empty:""", stack.is_empty())



