code: 
  """simple docstring"""
  import json
  import os
  from functools import lru_cache
  from typing import TYPE_CHECKING, List, Optional, Tuple
  
  import regex as re
  
  from ...tokenization_utils import AddedToken, PreTrainedTokenizer
  from ...utils import logging
  
  
  if TYPE_CHECKING:
   from transformers.pipelines.conversational import Conversation
  
  UpperCAmelCase   =	logging.get_logger(__name__)
  
  UpperCAmelCase   =	{
      """vocab_file""": """vocab.json""",
      """merges_file""": """merges.txt""",
  }
  
  UpperCAmelCase   =	{
      """vocab_file""": {
          """gpt2""": """https://huggingface.co/gpt2/resolve/main/vocab.json""",
          """gpt2-medium""": """https://huggingface.co/gpt2-medium/resolve/main/vocab.json""",
          """gpt2-large""": """https://huggingface.co/gpt2-large/resolve/main/vocab.json""",
          """gpt2-xl""": """https://huggingface.co/gpt2-xl/resolve/main/vocab.json""",
          """distilgpt2""": """https://huggingface.co/distilgpt2/resolve/main/vocab.json""",
      },
      """merges_file""": {
          """gpt2""": """https://huggingface.co/gpt2/resolve/main/merges.txt""",
          """gpt2-medium""": """https://huggingface.co/gpt2-medium/resolve/main/merges.txt""",
          """gpt2-large""": """https://huggingface.co/gpt2-large/resolve/main/merges.txt""",
          """gpt2-xl""": """https://huggingface.co/gpt2-xl/resolve/main/merges.txt""",
          """distilgpt2""": """https://huggingface.co/distilgpt2/resolve/main/merges.txt""",
      },
  }
  
  UpperCAmelCase   =	{
      """gpt2""": 1024,
      """gpt2-medium""": 1024,
      """gpt2-large""": 1024,
      """gpt2-xl""": 1024,
      """distilgpt2""": 1024,
  }
  
  @lru_cache()
  def 							_snake_case			(      ):
  
  
  
  
     """simple docstring"""
  
  
  
  
  
  
  
     _lowerCamelCase  :				Dict      =		(
         list(range(ord("""!"""      )	,   ord("""~"""      ) + 1      )      ) + list(range(ord("""¡"""      )	,   ord("""¬"""      ) + 1      )      ) + list(range(ord("""®"""      )	,   ord("""ÿ"""      ) + 1      )      )
     )
     _lowerCamelCase  :				Union[str, Any]      =		bs[:]
     _lowerCamelCase  :				Optional[Any]      =		0
     for b in range(2**8      ):
        if b not in bs:
           bs.append(__snake_case      )
           cs.append(2**8 + n      )
           n += 1
     _lowerCamelCase  :				Any      =		[chr(__snake_case      ) for n in cs]
     return dict(zip(__snake_case	,   __snake_case      )      )
  
  def 							_snake_case			(      __snake_case       :			Optional[int]      ):
  
  
  
  
     """simple docstring"""
  
  
  
  
  
  
  
     _lowerCamelCase  :				Optional[Any]      =		set()
     _lowerCamelCase  :				List[Any]      =		word[0]
     for char in word[1:]:
        pairs.add((prev_char, char)      )
        _lowerCamelCase  :				Dict      =		char
     return pairs
  
  
  
  
  
  class   lowercase__							(				A_							):
     __UpperCAmelCase       					=				VOCAB_FILES_NAMES
     __UpperCAmelCase       					=				PRETRAINED_VOCAB_FILES_MAP
     __UpperCAmelCase       					=				PRETRAINED_POSITIONAL_EMBEDDINGS_SIZES
     __UpperCAmelCase       					=				['''input_ids''', '''attention_mask''']
  
  
  
  
  
     def __init__(       self			,      SCREAMING_SNAKE_CASE			,      SCREAMING_SNAKE_CASE			,      SCREAMING_SNAKE_CASE="replace"			,      SCREAMING_SNAKE_CASE="<|endoftext|>"			,      SCREAMING_SNAKE_CASE="<|endoftext|>"			,      SCREAMING_SNAKE_CASE="<|endoftext|>"			,      SCREAMING_SNAKE_CASE=None			,      SCREAMING_SNAKE_CASE=False			,      SCREAMING_SNAKE_CASE=False			,      **SCREAMING_SNAKE_CASE			,      )     ->     Optional[int]:
        _lowerCamelCase  :				List[str]      =		AddedToken(SCREAMING_SNAKE_CASE			,      lstrip=SCREAMING_SNAKE_CASE			,      rstrip=SCREAMING_SNAKE_CASE) if isinstance(SCREAMING_SNAKE_CASE			,      SCREAMING_SNAKE_CASE) else bos_token
        _lowerCamelCase  :				int      =		AddedToken(SCREAMING_SNAKE_CASE			,      lstrip=SCREAMING_SNAKE_CASE			,      rstrip=SCREAMING_SNAKE_CASE) if isinstance(SCREAMING_SNAKE_CASE			,      SCREAMING_SNAKE_CASE) else eos_token
        _lowerCamelCase  :				Union[str, Any]      =		AddedToken(SCREAMING_SNAKE_CASE			,      lstrip=SCREAMING_SNAKE_CASE			,      rstrip=SCREAMING_SNAKE_CASE) if isinstance(SCREAMING_SNAKE_CASE			,      SCREAMING_SNAKE_CASE) else unk_token
        _lowerCamelCase  :				Optional[int]      =		AddedToken(SCREAMING_SNAKE_CASE			,      lstrip=SCREAMING_SNAKE_CASE			,      rstrip=SCREAMING_SNAKE_CASE) if isinstance(SCREAMING_SNAKE_CASE			,      SCREAMING_SNAKE_CASE) else pad_token
        super().__init__(
            errors=SCREAMING_SNAKE_CASE			,      unk_token=SCREAMING_SNAKE_CASE			,      bos_token=SCREAMING_SNAKE_CASE			,      eos_token=SCREAMING_SNAKE_CASE			,      pad_token=SCREAMING_SNAKE_CASE			,      add_prefix_space=SCREAMING_SNAKE_CASE			,      add_bos_token=SCREAMING_SNAKE_CASE			,      **SCREAMING_SNAKE_CASE			,      )
        _lowerCamelCase  :				Any      =		add_bos_token
  
        with open(SCREAMING_SNAKE_CASE			,      encoding="""utf-8""") as vocab_handle:
           _lowerCamelCase  :				int      =		json.load(SCREAMING_SNAKE_CASE)
        _lowerCamelCase  :				Dict      =		{v: k for k, v in self.encoder.items()}
        _lowerCamelCase  :				Optional[int]      =		errors  # how to handle errors in decoding
        _lowerCamelCase  :				Union[str, Any]      =		bytes_to_unicode()
        _lowerCamelCase  :				int      =		{v: k for k, v in self.byte_encoder.items()}
        with open(SCREAMING_SNAKE_CASE			,      encoding="""utf-8""") as merges_handle:
           _lowerCamelCase  :				List[str]      =		merges_handle.read().split("""\n""")[1:-1]
        _lowerCamelCase  :				str      =		[tuple(merge.split()) for merge in bpe_merges]
        _lowerCamelCase  :				Any      =		dict(zip(SCREAMING_SNAKE_CASE			,      range(len(SCREAMING_SNAKE_CASE))))
        _lowerCamelCase  :				Tuple      =		{}
        _lowerCamelCase  :				Dict      =		add_prefix_space
  
        # Should have added re.IGNORECASE so BPE merges can happen for capitalized versions of contractions
        _lowerCamelCase  :				str      =		re.compile(r"""'s|'t|'re|'ve|'m|'ll|'d| ?\p{L}+| ?\p{N}+| ?[^\s\p{L}\p{N}]+|\s+(?!\S)|\s+""")
  
  
  
  
  
     @property
     def 		UpperCamelCase_     (       self)     ->     Tuple:
        return len(self.encoder)
  
  
  
  
  
     def 		UpperCamelCase_     (       self)     ->     Any:
        return dict(self.encoder			,      **self.added_tokens_encoder)
  
  
  
  
  
     def 		UpperCamelCase_     (       self			,      SCREAMING_SNAKE_CASE)     ->     str:
        if token in self.cache:
           return self.cache[token]
        _lowerCamelCase  :				Optional[Any]      =		tuple(SCREAMING_SNAKE_CASE)
        _lowerCamelCase  :				List[Any]      =		get_pairs(SCREAMING_SNAKE_CASE)
  
        if not pairs:
           return token
  
        while True:
           _lowerCamelCase  :				List[Any]      =		min(SCREAMING_SNAKE_CASE			,      key=lambda SCREAMING_SNAKE_CASE: self.bpe_ranks.get(SCREAMING_SNAKE_CASE			,      float("""inf""")))
           if bigram not in self.bpe_ranks:
              break
           _lowerCamelCase  :				Union[str, Any]      =		bigram
           _lowerCamelCase  :				Tuple      =		[]
           _lowerCamelCase  :				Optional[Any]      =		0
           while i < len(SCREAMING_SNAKE_CASE):
              try:
                 _lowerCamelCase  :				Optional[int]      =		word.index(SCREAMING_SNAKE_CASE			,      SCREAMING_SNAKE_CASE)
              except ValueError:
                 new_word.extend(word[i:])
                 break
              else:
                 new_word.extend(word[i:j])
                 _lowerCamelCase  :				str      =		j
  
              if word[i] == first and i < len(SCREAMING_SNAKE_CASE) - 1 and word[i + 1] == second:
                 new_word.append(first + second)
                 i += 2
              else:
                 new_word.append(word[i])
                 i += 1
           _lowerCamelCase  :				Optional[Any]      =		tuple(SCREAMING_SNAKE_CASE)
           _lowerCamelCase  :				Optional[Any]      =		new_word
           if len(SCREAMING_SNAKE_CASE) == 1:
              break
           else:
              _lowerCamelCase  :				Dict      =		get_pairs(SCREAMING_SNAKE_CASE)
        _lowerCamelCase  :				Union[str, Any]      =		""" """.join(SCREAMING_SNAKE_CASE)
        _lowerCamelCase  :				Optional[int]      =		word
        return word
  
  
  
  
  
     def 		UpperCamelCase_     (       self			,      SCREAMING_SNAKE_CASE			,      SCREAMING_SNAKE_CASE=None)     ->     Union[str, Any]:
        if self.add_bos_token:
           _lowerCamelCase  :				str      =		[self.bos_token_id]
        else:
           _lowerCamelCase  :				Union[str, Any]      =		[]
  
        _lowerCamelCase  :				Optional[Any]      =		bos_token_ids + token_ids_a
  
        if token_ids_a is None:
           return output
  
        return output + bos_token_ids + token_ids_a
  
  
  
  
  
     def 		UpperCamelCase_     (       self			,      SCREAMING_SNAKE_CASE			,      SCREAMING_SNAKE_CASE = None			,      SCREAMING_SNAKE_CASE = False)     ->     List[int]:
        if already_has_special_tokens:
           return super().get_special_tokens_mask(
               token_ids_a=SCREAMING_SNAKE_CASE			,      token_ids_a=SCREAMING_SNAKE_CASE			,      already_has_special_tokens=SCREAMING_SNAKE_CASE)
  
        if not self.add_bos_token:
           return super().get_special_tokens_mask(
               token_ids_a=SCREAMING_SNAKE_CASE			,      token_ids_a=SCREAMING_SNAKE_CASE			,      already_has_special_tokens=SCREAMING_SNAKE_CASE)
  
        if token_ids_a is None:
           return [1] + ([0] * len(SCREAMING_SNAKE_CASE))
        return [1] + ([0] * len(SCREAMING_SNAKE_CASE)) + [1] + ([0] * len(SCREAMING_SNAKE_CASE))
  
  
  
  
  
     def 		UpperCamelCase_     (       self			,      SCREAMING_SNAKE_CASE)     ->     Optional[int]:
        _lowerCamelCase  :				Optional[int]      =		[]
        for token in re.findall(self.pat			,      SCREAMING_SNAKE_CASE):
           _lowerCamelCase  :				Optional[Any]      =		"""""".join(
               self.byte_encoder[b] for b in token.encode("""utf-8"""))  # Maps all our bytes to unicode strings, avoiding control tokens of the BPE (spaces in our case)
           bpe_tokens.extend(bpe_token for bpe_token in self.bpe(SCREAMING_SNAKE_CASE).split(""" """))
        return bpe_tokens
  
  
  
  
  
     def 		UpperCamelCase_     (       self			,      SCREAMING_SNAKE_CASE)     ->     int:
        return self.encoder.get(SCREAMING_SNAKE_CASE			,      self.encoder.get(self.unk_token))
  
  
  
  
  
     def 		UpperCamelCase_     (       self			,      SCREAMING_SNAKE_CASE)     ->     List[str]:
        return self.decoder.get(SCREAMING_SNAKE_CASE)
  
  
  
  
  
     def 		UpperCamelCase_     (       self			,      SCREAMING_SNAKE_CASE)     ->     int:
        _lowerCamelCase  :				int      =		"""""".join(SCREAMING_SNAKE_CASE)
        _lowerCamelCase  :				str      =		bytearray([self.byte_decoder[c] for c in text]).decode("""utf-8"""			,      errors=self.errors)
        return text
  
  
  
  
  
     def 		UpperCamelCase_     (       self			,      SCREAMING_SNAKE_CASE			,      SCREAMING_SNAKE_CASE = None)     ->     Tuple[str]:
        if not os.path.isdir(SCREAMING_SNAKE_CASE):
           logger.error(F'Vocabulary path ({save_directory}) should be a directory')
           return
        _lowerCamelCase  :				str      =		os.path.join(
            SCREAMING_SNAKE_CASE			,      (filename_prefix + """-""" if filename_prefix else """""") + VOCAB_FILES_NAMES["""vocab_file"""])
        _lowerCamelCase  :				List[Any]      =		os.path.join(
            SCREAMING_SNAKE_CASE			,      (filename_prefix + """-""" if filename_prefix else """""") + VOCAB_FILES_NAMES["""merges_file"""])
  
        with open(SCREAMING_SNAKE_CASE			,      """w"""			,      encoding="""utf-8""") as f:
           f.write(json.dumps(self.encoder			,      indent=2			,      sort_keys=SCREAMING_SNAKE_CASE			,      ensure_ascii=SCREAMING_SNAKE_CASE) + """\n""")
  
        _lowerCamelCase  :				Tuple      =		0
        with open(SCREAMING_SNAKE_CASE			,      """w"""			,      encoding="""utf-8""") as writer:
           writer.write("""#version: 0.2\n""")
           for bpe_tokens, token_index in sorted(self.bpe_ranks.items()			,      key=lambda SCREAMING_SNAKE_CASE: kv[1]):
              if index != token_index:
                 logger.warning(
                     F'Saving vocabulary to {merge_file}: BPE merge indices are not consecutive.'
                     """ Please check that the tokenizer is not corrupted!""")
                 _lowerCamelCase  :				Dict      =		token_index
              writer.write(""" """.join(SCREAMING_SNAKE_CASE) + """\n""")
              index += 1
  
        return vocab_file, merge_file
  
  
  
  
  
     def 		UpperCamelCase_     (       self			,      SCREAMING_SNAKE_CASE			,      SCREAMING_SNAKE_CASE=False			,      **SCREAMING_SNAKE_CASE)     ->     List[Any]:
        _lowerCamelCase  :				List[str]      =		kwargs.pop("""add_prefix_space"""			,      self.add_prefix_space)
        if is_split_into_words or add_prefix_space:
           _lowerCamelCase  :				str      =		""" """ + text
        return (text, kwargs)
  
  
  
  
  
     def 		UpperCamelCase_     (       self			,      SCREAMING_SNAKE_CASE)     ->     List[int]:
        _lowerCamelCase  :				Tuple      =		[]
        for is_user, text in conversation.iter_texts():
           input_ids.extend(self.encode(SCREAMING_SNAKE_CASE			,      add_special_tokens=SCREAMING_SNAKE_CASE) + [self.eos_token_id])
        if len(SCREAMING_SNAKE_CASE) > self.model_max_length:
           _lowerCamelCase  :				Optional[int]      =		input_ids[-self.model_max_length :]
        return input_ids
  
  
style_context: 
  
  
  """simple docstring"""
  def 							_snake_case			(      __snake_case       :			str	,   __snake_case       :			str	,   __snake_case       :			int	,   __snake_case       :			int	,   __snake_case       :			int	,   __snake_case       :			int	,   ):
  
  
  
  
     """simple docstring"""
  
  
  
  
  
  
  
     _lowerCamelCase  :				Optional[Any]      =		list(__snake_case      )
     _lowerCamelCase  :				Optional[int]      =		list(__snake_case      )
     _lowerCamelCase  :				Union[str, Any]      =		len(__snake_case      )
     _lowerCamelCase  :				Optional[int]      =		len(__snake_case      )
  
     _lowerCamelCase  :				List[str]      =		[
         [0 for _ in range(len_destination_seq + 1      )] for _ in range(len_source_seq + 1      )
     ]
     _lowerCamelCase  :				List[Any]      =		[
         ["""0""" for _ in range(len_destination_seq + 1      )] for _ in range(len_source_seq + 1      )
     ]
  
     for i in range(1	,   len_source_seq + 1      ):
        _lowerCamelCase  :				Optional[Any]      =		i * delete_cost
        _lowerCamelCase  :				Any      =		F'D{source_seq[i - 1]:c}'
  
     for i in range(1	,   len_destination_seq + 1      ):
        _lowerCamelCase  :				Dict      =		i * insert_cost
        _lowerCamelCase  :				List[str]      =		F'I{destination_seq[i - 1]:c}'
  
     for i in range(1	,   len_source_seq + 1      ):
        for j in range(1	,   len_destination_seq + 1      ):
           if source_seq[i - 1] == destination_seq[j - 1]:
              _lowerCamelCase  :				Union[str, Any]      =		costs[i - 1][j - 1] + copy_cost
              _lowerCamelCase  :				Tuple      =		F'C{source_seq[i - 1]:c}'
           else:
              _lowerCamelCase  :				Tuple      =		costs[i - 1][j - 1] + replace_cost
              _lowerCamelCase  :				List[str]      =		F'R{source_seq[i - 1]:c}' + str(destination_seq[j - 1]      )
  
           if costs[i - 1][j] + delete_cost < costs[i][j]:
              _lowerCamelCase  :				Any      =		costs[i - 1][j] + delete_cost
              _lowerCamelCase  :				Any      =		F'D{source_seq[i - 1]:c}'
  
           if costs[i][j - 1] + insert_cost < costs[i][j]:
              _lowerCamelCase  :				Dict      =		costs[i][j - 1] + insert_cost
              _lowerCamelCase  :				Union[str, Any]      =		F'I{destination_seq[j - 1]:c}'
  
     return costs, ops
  
  def 							_snake_case			(      __snake_case       :			list[list[str]]	,   __snake_case       :			int	,   __snake_case       :			int      ):
  
  
  
  
     """simple docstring"""
  
  
  
  
  
  
  
     if i == 0 and j == 0:
        return []
     else:
        if ops[i][j][0] == "C" or ops[i][j][0] == "R":
           _lowerCamelCase  :				List[Any]      =		assemble_transformation(__snake_case	,   i - 1	,   j - 1      )
           seq.append(ops[i][j]      )
           return seq
        elif ops[i][j][0] == "D":
           _lowerCamelCase  :				Optional[Any]      =		assemble_transformation(__snake_case	,   i - 1	,   __snake_case      )
           seq.append(ops[i][j]      )
           return seq
        else:
           _lowerCamelCase  :				str      =		assemble_transformation(__snake_case	,   __snake_case	,   j - 1      )
           seq.append(ops[i][j]      )
           return seq
  
  
  if __name__ == "__main__":
   UpperCAmelCase ,     UpperCAmelCase   =	compute_transform_tables("""Python""", """Algorithms""", -1, 1, 2, 2)
  
   UpperCAmelCase   =	len(operations)
   UpperCAmelCase   =	len(operations[0])
   UpperCAmelCase   =	assemble_transformation(operations, m - 1, n - 1)
  
   UpperCAmelCase   =	list("""Python""")
   UpperCAmelCase   =	0
   UpperCAmelCase   =	0
  
   with open("""min_cost.txt""", """w""") as file:
    for op in sequence:
     print("""""".join(string))
  
     if op[0] == "C":
      file.write("""%-16s""" % """Copy %c""" % op[1])
      file.write("""\t\t\t""" + """""".join(string))
      file.write("""\r\n""")
  
      cost -= 1
     elif op[0] == "R":
      UpperCAmelCase   =	op[2]
  
      file.write("""%-16s""" % ("""Replace %c""" % op[1] + """ with """ + str(op[2])))
      file.write("""\t\t""" + """""".join(string))
      file.write("""\r\n""")
  
      cost += 1
     elif op[0] == "D":
      string.pop(i)
  
      file.write("""%-16s""" % """Delete %c""" % op[1])
      file.write("""\t\t\t""" + """""".join(string))
      file.write("""\r\n""")
  
      cost += 2
     else:
      string.insert(i, op[1])
  
      file.write("""%-16s""" % """Insert %c""" % op[1])
      file.write("""\t\t\t""" + """""".join(string))
      file.write("""\r\n""")
  
      cost += 2
  
     i += 1
  
    print("""""".join(string))
    print("""Cost: """, cost)
  
    file.write("""\r\nMinimum cost: """ + str(cost))
  
  