
"""simple docstring"""

import os
from shutil import copyfile
from typing import List, Optional, Tuple

from ...tokenization_utils_fast import PreTrainedTokenizerFast
from ...utils import is_sentencepiece_available, logging


if is_sentencepiece_available():
   from .tokenization_pegasus import PegasusTokenizer
else:
   SCREAMING_SNAKE_CASE_    					=						None


SCREAMING_SNAKE_CASE_    					=						logging.get_logger(__name__)


SCREAMING_SNAKE_CASE_    					=						'''▁'''

SCREAMING_SNAKE_CASE_    					=						{'''vocab_file''': '''spiece.model''', '''tokenizer_file''': '''tokenizer.json'''}

SCREAMING_SNAKE_CASE_    					=						{
    '''vocab_file''': {'''google/pegasus-xsum''': '''https://huggingface.co/google/pegasus-xsum/resolve/main/spiece.model'''},
    '''tokenizer_file''': {
        '''google/pegasus-xsum''': '''https://huggingface.co/google/pegasus-xsum/resolve/main/tokenizer.json'''
    },
}

SCREAMING_SNAKE_CASE_    					=						{
    '''google/pegasus-xsum''': 512,
}
class      _UpperCAmelCase							(		SCREAMING_SNAKE_CASE_							):
      __SCREAMING_SNAKE_CASE   :							Tuple							      =	VOCAB_FILES_NAMES
      __SCREAMING_SNAKE_CASE   :							Any							      =	PRETRAINED_VOCAB_FILES_MAP
      __SCREAMING_SNAKE_CASE   :							Any							      =	PRETRAINED_POSITIONAL_EMBEDDINGS_SIZES
      __SCREAMING_SNAKE_CASE   :							Tuple							      =	PegasusTokenizer
      __SCREAMING_SNAKE_CASE   :							Union[str, Any]							      =	["input_ids", "attention_mask"]




      def __init__(							self   ,       lowercase_=None   ,       lowercase_=None   ,       lowercase_="<pad>"   ,       lowercase_="</s>"   ,       lowercase_="<unk>"   ,       lowercase_="<mask_2>"   ,       lowercase_="<mask_1>"   ,       lowercase_=None   ,       lowercase_=1_0_3   ,       **lowercase_   ,       )						->					Any:
          UpperCAmelCase									=					offset

          if additional_special_tokens is not None:
              if not isinstance(lowercase_   ,       lowercase_							):
                  raise TypeError(
                      F"additional_special_tokens should be of type {type(lowercase_							)}, but is"
                      F" {type(lowercase_							)}"							)

              UpperCAmelCase									=					(
                  ([mask_token_sent] + additional_special_tokens)
                  if mask_token_sent not in additional_special_tokens and mask_token_sent is not None
                  else additional_special_tokens
              )
              # fill additional tokens with ..., <unk_token_102> in case not all additional tokens are already taken
              additional_special_tokens_extended += [
                  F"<unk_{i}>" for i in range(len(lowercase_							)   ,       self.offset - 1							)
              ]

              if len(set(lowercase_							)							) != len(lowercase_							):
                  raise ValueError(
                      'Please make sure that the provided additional_special_tokens do not contain an incorrectly'
                      F" shifted list of <unk_x> tokens. Found {additional_special_tokens_extended}."							)
              UpperCAmelCase									=					additional_special_tokens_extended
          else:
              UpperCAmelCase									=					[mask_token_sent] if mask_token_sent is not None else []
              additional_special_tokens += [F"<unk_{i}>" for i in range(2   ,       self.offset							)]

          super().__init__(
              lowercase_   ,       tokenizer_file=lowercase_   ,       pad_token=lowercase_   ,       eos_token=lowercase_   ,       unk_token=lowercase_   ,       mask_token=lowercase_   ,       mask_token_sent=lowercase_   ,       offset=lowercase_   ,       additional_special_tokens=lowercase_   ,       **lowercase_   ,       )
          UpperCAmelCase									=					vocab_file
          UpperCAmelCase									=					False if not self.vocab_file else True




      def     a_      (							self   ,       lowercase_							)						->					List[Any]:
          UpperCAmelCase									=					set(self.all_special_ids							)  # call it once instead of inside list comp
          all_special_ids.remove(self.unk_token_id							)  # <unk> is only sometimes special

          if all_special_ids != set(range(len(self.additional_special_tokens							) + 3							)							):
              raise ValueError(
                  'There should be 3 special tokens: mask_token, pad_token, and eos_token +'
                  F" {len(self.additional_special_tokens							)} additional_special_tokens, but got {all_special_ids}"							)

          return [1 if x in all_special_ids else 0 for x in seq]




      def     a_      (							self   ,       lowercase_   ,       lowercase_ = None   ,       lowercase_ = False							)						->					List[int]:
          if already_has_special_tokens:
              return self._special_token_mask(lowercase_							)
          elif token_ids_a is None:
              return self._special_token_mask(lowercase_							) + [1]
          else:
              return self._special_token_mask(token_ids_a + token_ids_a							) + [1]




      def     a_      (							self   ,       lowercase_   ,       lowercase_=None							)						->					List[int]:
          if token_ids_a is None:
              return token_ids_a + [self.eos_token_id]
          # We don't expect to process pairs, but leave the pair logic for API consistency
          return token_ids_a + token_ids_a + [self.eos_token_id]




      def     a_      (							self   ,       lowercase_   ,       lowercase_ = None							)						->					Tuple[str]:
          if not self.can_save_slow_tokenizer:
              raise ValueError(
                  'Your fast tokenizer does not have the necessary information to save the vocabulary for a slow '
                  'tokenizer.'							)

          if not os.path.isdir(lowercase_							):
              logger.error(F"Vocabulary path ({save_directory}) should be a directory"							)
              return
          UpperCAmelCase									=					os.path.join(
              lowercase_   ,       (filename_prefix + '-' if filename_prefix else '') + VOCAB_FILES_NAMES['vocab_file']							)

          if os.path.abspath(self.vocab_file							) != os.path.abspath(lowercase_							):
              copyfile(self.vocab_file   ,       lowercase_							)

          return (out_vocab_file,)





"""simple docstring"""

def     lowercase__						(					lowerCAmelCase				:					int ,				lowerCAmelCase				:					list ) ->      int:






    """simple docstring"""




    _enforce_args(lowerCAmelCase ,				lowerCAmelCase )
    if n == 0:
        return 0
    UpperCAmelCase									=					float('-inf' )
    for i in range(1 ,				n + 1 ):
        UpperCAmelCase									=					max(
            lowerCAmelCase ,				prices[i - 1] + naive_cut_rod_recursive(n - i ,				lowerCAmelCase ) )

    return max_revue




def     lowercase__						(					lowerCAmelCase				:					int ,				lowerCAmelCase				:					list ) ->      Dict:






    """simple docstring"""




    _enforce_args(lowerCAmelCase ,				lowerCAmelCase )
    UpperCAmelCase									=					[float('-inf' ) for _ in range(n + 1 )]
    return _top_down_cut_rod_recursive(lowerCAmelCase ,				lowerCAmelCase ,				lowerCAmelCase )




def     lowercase__						(					lowerCAmelCase				:					int ,				lowerCAmelCase				:					list ,				lowerCAmelCase				:					list ) ->      int:






    """simple docstring"""




    if max_rev[n] >= 0:
        return max_rev[n]
    elif n == 0:
        return 0
    else:
        UpperCAmelCase									=					float('-inf' )
        for i in range(1 ,				n + 1 ):
            UpperCAmelCase									=					max(
                lowerCAmelCase ,				prices[i - 1] + _top_down_cut_rod_recursive(n - i ,				lowerCAmelCase ,				lowerCAmelCase ) ,				)

        UpperCAmelCase									=					max_revenue

    return max_rev[n]




def     lowercase__						(					lowerCAmelCase				:					int ,				lowerCAmelCase				:					list ) ->      Optional[int]:






    """simple docstring"""




    _enforce_args(lowerCAmelCase ,				lowerCAmelCase )

    # length(max_rev) = n + 1, to accommodate for the revenue obtainable from a rod of
    # length 0.
    UpperCAmelCase									=					[float('-inf' ) for _ in range(n + 1 )]
    UpperCAmelCase									=					0

    for i in range(1 ,				n + 1 ):
        UpperCAmelCase									=					max_rev[i]
        for j in range(1 ,				i + 1 ):
            UpperCAmelCase									=					max(lowerCAmelCase ,				prices[j - 1] + max_rev[i - j] )

        UpperCAmelCase									=					max_revenue_i

    return max_rev[n]




def     lowercase__						(					lowerCAmelCase				:					int ,				lowerCAmelCase				:					list ) ->      Union[str, Any]:






    """simple docstring"""




    if n < 0:
        UpperCAmelCase									=					F"n must be greater than or equal to 0. Got n = {n}"
        raise ValueError(lowerCAmelCase )

    if n > len(lowerCAmelCase ):
        UpperCAmelCase									=					(
            'Each integral piece of rod must have a corresponding price. '
            F"Got n = {n} but length of prices = {len(lowerCAmelCase )}"
        )
        raise ValueError(lowerCAmelCase )




def     lowercase__						(					) ->      Optional[int]:






    """simple docstring"""




    UpperCAmelCase									=					[6, 10, 12, 15, 20, 23]
    UpperCAmelCase									=					len(lowerCAmelCase )

    # the best revenue comes from cutting the rod into 6 pieces, each
    # of length 1 resulting in a revenue of 6 * 6 = 36.
    UpperCAmelCase									=					36

    UpperCAmelCase									=					top_down_cut_rod(lowerCAmelCase ,				lowerCAmelCase )
    UpperCAmelCase									=					bottom_up_cut_rod(lowerCAmelCase ,				lowerCAmelCase )
    UpperCAmelCase									=					naive_cut_rod_recursive(lowerCAmelCase ,				lowerCAmelCase )

    assert expected_max_revenue == max_rev_top_down
    assert max_rev_top_down == max_rev_bottom_up
    assert max_rev_bottom_up == max_rev_naive


if __name__ == "__main__":
   main()



