






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_							=			logging.get_logger(__name__)


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

a_							=			{
    '''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_							=			{'''facebook/blenderbot_small-90M''': 512}


def 				_a     (   UpperCamelCase_    : List[str]      )       ->      int:
						"""simple docstring"""







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

						lowerCAmelCase__       					=  set(_lowerCamelCase      )
						return pairs





class    lowercase__   (	__snake_case		):
	a_   			=VOCAB_FILES_NAMES
	a_   			=PRETRAINED_VOCAB_FILES_MAP
	a_   			=PRETRAINED_POSITIONAL_EMBEDDINGS_SIZES
	a_   			=["""input_ids""", """attention_mask"""]

	def __init__(							self						,			__UpperCAmelCase						,			__UpperCAmelCase						,			__UpperCAmelCase="__start__"						,			__UpperCAmelCase="__end__"						,			__UpperCAmelCase="__unk__"						,			__UpperCAmelCase="__null__"						,			**__UpperCAmelCase						,			)->    Dict:







							'''simple docstring'''





							super().__init__(unk_token=__SCREAMING_SNAKE_CASE						,			bos_token=__SCREAMING_SNAKE_CASE						,			eos_token=__SCREAMING_SNAKE_CASE						,			pad_token=__SCREAMING_SNAKE_CASE						,			**__SCREAMING_SNAKE_CASE				)

							with open(__SCREAMING_SNAKE_CASE						,			encoding="utf-8"				) as vocab_handle:
													lowerCAmelCase__       					=  json.load(__SCREAMING_SNAKE_CASE				)
							lowerCAmelCase__       					=  {v: k for k, v in self.encoder.items()}
							with open(__SCREAMING_SNAKE_CASE						,			encoding="utf-8"				) as merges_handle:
													lowerCAmelCase__       					=  merges_handle.read().split("\n"				)[1:-1]
							lowerCAmelCase__       					=  [tuple(merge.split()				) for merge in merges]
							lowerCAmelCase__       					=  dict(zip(__SCREAMING_SNAKE_CASE						,			range(len(__SCREAMING_SNAKE_CASE				)				)				)				)
							lowerCAmelCase__       					=  {}

	@property
	def 						UpperCAmelCase     (							self				)->    int:







							'''simple docstring'''





							return len(self.encoder				)

	def 						UpperCAmelCase     (							self				)->    Dict:







							'''simple docstring'''





							return dict(self.encoder						,			**self.added_tokens_encoder				)

	def 						UpperCAmelCase     (							self						,			__UpperCAmelCase				)->    str:







							'''simple docstring'''





							if token in self.cache:
													return self.cache[token]
							lowerCAmelCase__       					=  re.sub("([.,!?()])"						,			R" \1"						,			__SCREAMING_SNAKE_CASE				)
							lowerCAmelCase__       					=  re.sub("(\')"						,			R" \1 "						,			__SCREAMING_SNAKE_CASE				)
							lowerCAmelCase__       					=  re.sub(R"\s{2,}"						,			" "						,			__SCREAMING_SNAKE_CASE				)
							if "\n" in token:
													lowerCAmelCase__       					=  token.replace("\n"						,			" __newln__"				)

							lowerCAmelCase__       					=  token.split(" "				)
							lowerCAmelCase__       					=  []
							for token in tokens:
													if not len(__SCREAMING_SNAKE_CASE				):
																			continue

													lowerCAmelCase__       					=  token.lower()
													lowerCAmelCase__       					=  tuple(__SCREAMING_SNAKE_CASE				)
													lowerCAmelCase__       					=  tuple(list(word[:-1]				) + [word[-1] + "</w>"]				)
													lowerCAmelCase__       					=  get_pairs(__SCREAMING_SNAKE_CASE				)

													if not pairs:
																			words.append(__SCREAMING_SNAKE_CASE				)
																			continue

													while True:
																			lowerCAmelCase__       					=  min(__SCREAMING_SNAKE_CASE						,			key=lambda __UpperCAmelCase				: self.bpe_ranks.get(__SCREAMING_SNAKE_CASE						,			float("inf"				)				)				)
																			if bigram not in self.bpe_ranks:
																									break
																			lowerCAmelCase__					,							lowerCAmelCase__       					=  bigram
																			lowerCAmelCase__       					=  []
																			lowerCAmelCase__       					=  0

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

																									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__       					=  tuple(__SCREAMING_SNAKE_CASE				)
																			lowerCAmelCase__       					=  new_word
																			if len(__SCREAMING_SNAKE_CASE				) == 1:
																									break
																			else:
																									lowerCAmelCase__       					=  get_pairs(__SCREAMING_SNAKE_CASE				)
													lowerCAmelCase__       					=  "@@ ".join(__SCREAMING_SNAKE_CASE				)
													lowerCAmelCase__       					=  word[:-4]

													lowerCAmelCase__       					=  word
													words.append(__SCREAMING_SNAKE_CASE				)
							return " ".join(__SCREAMING_SNAKE_CASE				)

	def 						UpperCAmelCase     (							self						,			__UpperCAmelCase				)->    List[str]:







							'''simple docstring'''





							lowerCAmelCase__       					=  []

							lowerCAmelCase__       					=  re.findall(R"\S+\n?"						,			__SCREAMING_SNAKE_CASE				)

							for token in words:
													split_tokens.extend(list(self.bpe(__SCREAMING_SNAKE_CASE				).split(" "				)				)				)
							return split_tokens

	def 						UpperCAmelCase     (							self						,			__UpperCAmelCase				)->    int:







							'''simple docstring'''





							lowerCAmelCase__       					=  token.lower()
							return self.encoder.get(__SCREAMING_SNAKE_CASE						,			self.encoder.get(self.unk_token				)				)

	def 						UpperCAmelCase     (							self						,			__UpperCAmelCase				)->    str:







							'''simple docstring'''





							return self.decoder.get(__SCREAMING_SNAKE_CASE						,			self.unk_token				)

	def 						UpperCAmelCase     (							self						,			__UpperCAmelCase				)->    str:







							'''simple docstring'''





							lowerCAmelCase__       					=  " ".join(__SCREAMING_SNAKE_CASE				).replace("@@ "						,			""				).strip()
							return out_string


	def 						UpperCAmelCase     (							self						,			__UpperCAmelCase						,			__UpperCAmelCase = None				)->    Tuple[str]:







							'''simple docstring'''





							if not os.path.isdir(__SCREAMING_SNAKE_CASE				):
													logger.error(F"Vocabulary path ({save_directory}) should be a directory"				)
													return
							lowerCAmelCase__       					=  os.path.join(
							    __SCREAMING_SNAKE_CASE						,			(filename_prefix + "-" if filename_prefix else "") + VOCAB_FILES_NAMES["vocab_file"]				)
							lowerCAmelCase__       					=  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__       					=  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 __UpperCAmelCase				: 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__       					=  token_index
																			writer.write(" ".join(__SCREAMING_SNAKE_CASE				) + "\n"				)
																			index += 1

							return vocab_file, merge_file














"""simple docstring"""





from cva import destroyAllWindows, imread, imshow, waitKey







def      lowerCamelCase__       (							_lowerCamelCase       :		Tuple )      ->				Dict:
  # getting number of pixels in the image
  lowerCamelCase_     ,	lowerCamelCase_         =						img.shape[0], img.shape[1]

  # converting each pixel's color to its negative
  for i in range(_lowerCamelCase ):
    for j in range(_lowerCamelCase ):
      lowerCamelCase_         =						[255, 255, 255] - img[i][j]

  return img


if __name__ == "__main__":
  # read original image
  _SCREAMING_SNAKE_CASE					:				List[Any]					    =						imread('''image_data/lena.jpg''', 1)

  # convert to its negative
  _SCREAMING_SNAKE_CASE					:				List[Any]					    =						convert_to_negative(img)

  # show result image
  imshow('''negative of original image''', img)
  waitKey(0)
  destroyAllWindows()




