


'''simple docstring'''






import json
import os
from typing import Dict, List, Optional, Tuple

import regex as re

from ...tokenization_utils import PreTrainedTokenizer
from ...utils import logging


a_					:    Union[str, Any]          =    logging.get_logger(__name__)


a_					:    Any          =    {
    "vocab_file": "vocab.json",
    "merges_file": "merges.txt",
    "tokenizer_config_file": "tokenizer_config.json",
}

a_					:    Optional[Any]          =    {
    "vocab_file": {
        "facebook/blenderbot_small-90M": "https://huggingface.co/facebook/blenderbot_small-90M/resolve/main/vocab.json"
    },
    "merges_file": {
        "facebook/blenderbot_small-90M": "https://huggingface.co/facebook/blenderbot_small-90M/resolve/main/merges.txt"
    },
    "tokenizer_config_file": {
        "facebook/blenderbot_small-90M": (
            "https://huggingface.co/facebook/blenderbot_small-90M/resolve/main/tokenizer_config.json"
        )
    },
}

a_					:    int          =    {"facebook/blenderbot_small-90M": 5_1_2}






def 	_A				(lowerCAmelCase__  :Tuple		)   ->  Any:




     '''simple docstring'''



     _a			      =							set()
     _a			      =							word[0]
     for char in word[1:]:
          pairs.add((prev_char, char)		)
          _a			      =							char

     _a			      =							set(lowerCAmelCase__		)
     return pairs






class  a     (     _SCREAMING_SNAKE_CASE       ):
 _lowerCAmelCase 					=	VOCAB_FILES_NAMES
 _lowerCAmelCase 					=	PRETRAINED_VOCAB_FILES_MAP
 _lowerCAmelCase 					=	PRETRAINED_POSITIONAL_EMBEDDINGS_SIZES
 _lowerCAmelCase 					=	["""input_ids""", """attention_mask"""]
 def __init__( self      ,				__magic_name__      ,				__magic_name__      ,				__magic_name__="__start__"      ,				__magic_name__="__end__"      ,				__magic_name__="__unk__"      ,				__magic_name__="__null__"      ,				**__magic_name__      ,				)					->							Optional[Any]:
      super().__init__(unk_token=__magic_name__      ,				bos_token=__magic_name__      ,				eos_token=__magic_name__      ,				pad_token=__magic_name__      ,				**__magic_name__						)

      with open(__magic_name__      ,				encoding='utf-8'						) as vocab_handle:
           _a			      =							json.load(__magic_name__						)
      _a			      =							{v: k for k, v in self.encoder.items()}
      with open(__magic_name__      ,				encoding='utf-8'						) as merges_handle:
           _a			      =							merges_handle.read().split('\n'						)[1:-1]
      _a			      =							[tuple(merge.split()						) for merge in merges]
      _a			      =							dict(zip(__magic_name__      ,				range(len(__magic_name__						)						)						)						)
      _a			      =							{}
 @property
 def 							__UpperCAmelCase		( self						)					->							int:
      return len(self.encoder						)
 def 							__UpperCAmelCase		( self						)					->							Dict:
      return dict(self.encoder      ,				**self.added_tokens_encoder						)
 def 							__UpperCAmelCase		( self      ,				__magic_name__						)					->							str:
      if token in self.cache:
           return self.cache[token]
      _a			      =							re.sub('([.,!?()])'      ,				r' \1'      ,				__magic_name__						)
      _a			      =							re.sub('(\')'      ,				r' \1 '      ,				__magic_name__						)
      _a			      =							re.sub(r'\s{2,}'      ,				' '      ,				__magic_name__						)
      if "\n" in token:
           _a			      =							token.replace('\n'      ,				' __newln__'						)

      _a			      =							token.split(' '						)
      _a			      =							[]
      for token in tokens:
           if not len(__magic_name__						):
                continue

           _a			      =							token.lower()
           _a			      =							tuple(__magic_name__						)
           _a			      =							tuple(list(word[:-1]						) + [word[-1] + '</w>']						)
           _a			      =							get_pairs(__magic_name__						)

           if not pairs:
                words.append(__magic_name__						)
                continue

           while True:
                _a			      =							min(__magic_name__      ,				key=lambda __magic_name__						: self.bpe_ranks.get(__magic_name__      ,				float('inf'						)						)						)
                if bigram not in self.bpe_ranks:
                     break
                _a      ,   _a			      =							bigram
                _a			      =							[]
                _a			      =							0

                while i < len(__magic_name__						):
                     try:
                          _a			      =							word.index(__magic_name__      ,				__magic_name__						)
                          new_word.extend(word[i:j]						)
                          _a			      =							j
                     except ValueError:
                          new_word.extend(word[i:]						)
                          break

                     if word[i] == first and i < len(__magic_name__						) - 1 and word[i + 1] == second:
                          new_word.append(first + second						)
                          i += 2
                     else:
                          new_word.append(word[i]						)
                          i += 1
                _a			      =							tuple(__magic_name__						)
                _a			      =							new_word
                if len(__magic_name__						) == 1:
                     break
                else:
                     _a			      =							get_pairs(__magic_name__						)
           _a			      =							'@@ '.join(__magic_name__						)
           _a			      =							word[:-4]

           _a			      =							word
           words.append(__magic_name__						)
      return " ".join(__magic_name__						)
 def 							__UpperCAmelCase		( self      ,				__magic_name__						)					->							List[str]:
      _a			      =							[]

      _a			      =							re.findall(r'\S+\n?'      ,				__magic_name__						)

      for token in words:
           split_tokens.extend(list(self.bpe(__magic_name__						).split(' '						)						)						)
      return split_tokens
 def 							__UpperCAmelCase		( self      ,				__magic_name__						)					->							int:
      _a			      =							token.lower()
      return self.encoder.get(__magic_name__      ,				self.encoder.get(self.unk_token						)						)
 def 							__UpperCAmelCase		( self      ,				__magic_name__						)					->							str:
      return self.decoder.get(__magic_name__      ,				self.unk_token						)
 def 							__UpperCAmelCase		( self      ,				__magic_name__						)					->							str:
      _a			      =							' '.join(__magic_name__						).replace('@@ '      ,				''						).strip()
      return out_string




 def 							__UpperCAmelCase		( self      ,				__magic_name__      ,				__magic_name__ = None						)					->							Tuple[str]:
      if not os.path.isdir(__magic_name__						):
           logger.error(f'Vocabulary path ({save_directory}) should be a directory'						)
           return
      _a			      =							os.path.join(
          __magic_name__      ,				(filename_prefix + '-' if filename_prefix else '') + VOCAB_FILES_NAMES['vocab_file']						)
      _a			      =							os.path.join(
          __magic_name__      ,				(filename_prefix + '-' if filename_prefix else '') + VOCAB_FILES_NAMES['merges_file']						)

      with open(__magic_name__      ,				'w'      ,				encoding='utf-8'						) as f:
           f.write(json.dumps(self.encoder      ,				indent=2      ,				sort_keys=__magic_name__      ,				ensure_ascii=__magic_name__						) + '\n'						)

      _a			      =							0
      with open(__magic_name__      ,				'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 __magic_name__						: 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!'						)
                     _a			      =							token_index
                writer.write(' '.join(__magic_name__						) + '\n'						)
                index += 1

      return vocab_file, merge_file





'''simple docstring'''






class  a     :
 def __init__( self						)					->							List[Any]:
      _a			      =							''
      _a			      =							''
      _a			      =							[]
 def 							__UpperCAmelCase		( self      ,				__magic_name__      ,				__magic_name__						)					->							int:
      if m == -1:
           return n + 1
      elif n == -1:
           return m + 1
      elif self.dp[m][n] > -1:
           return self.dp[m][n]
      else:
           if self.worda[m] == self.worda[n]:
                _a			      =							self.__min_dist_top_down_dp(m - 1      ,				n - 1						)
           else:
                _a			      =							self.__min_dist_top_down_dp(__magic_name__      ,				n - 1						)
                _a			      =							self.__min_dist_top_down_dp(m - 1      ,				__magic_name__						)
                _a			      =							self.__min_dist_top_down_dp(m - 1      ,				n - 1						)
                _a			      =							1 + min(__magic_name__      ,				__magic_name__      ,				__magic_name__						)

           return self.dp[m][n]
 def 							__UpperCAmelCase		( self      ,				__magic_name__      ,				__magic_name__						)					->							int:
      _a			      =							worda
      _a			      =							worda
      _a			      =							[[-1 for _ in range(len(__magic_name__						)						)] for _ in range(len(__magic_name__						)						)]

      return self.__min_dist_top_down_dp(len(__magic_name__						) - 1      ,				len(__magic_name__						) - 1						)




 def 							__UpperCAmelCase		( self      ,				__magic_name__      ,				__magic_name__						)					->							int:
      _a			      =							worda
      _a			      =							worda
      _a			      =							len(__magic_name__						)
      _a			      =							len(__magic_name__						)
      _a			      =							[[0 for _ in range(n + 1						)] for _ in range(m + 1						)]

      for i in range(m + 1						):
           for j in range(n + 1						):
                if i == 0:  # first string is empty
                     _a			      =							j
                elif j == 0:  # second string is empty
                     _a			      =							i
                elif worda[i - 1] == worda[j - 1]:  # last characters are equal
                     _a			      =							self.dp[i - 1][j - 1]
                else:
                     _a			      =							self.dp[i][j - 1]
                     _a			      =							self.dp[i - 1][j]
                     _a			      =							self.dp[i - 1][j - 1]
                     _a			      =							1 + min(__magic_name__      ,				__magic_name__      ,				__magic_name__						)
      return self.dp[m][n]


if __name__ == "__main__":
 a_					:    Dict          =    EditDistance()

 print("****************** Testing Edit Distance DP Algorithm ******************")
 print()

 a_					:    Tuple          =    input("Enter the first string: ").strip()
 a_					:    Dict          =    input("Enter the second string: ").strip()

 print()
 print(f'''The minimum edit distance is: {solver.min_dist_top_down(Sa, Sa)}''')
 print(f'''The minimum edit distance is: {solver.min_dist_bottom_up(Sa, Sa)}''')
 print()
 print("*************** End of Testing Edit Distance DP Algorithm ***************")

