code: 
  
  
  import json
  import os
  import re
  import unicodedata
  from typing import Dict, List, Optional, Tuple
  
  from ...tokenization_utils import PreTrainedTokenizer
  from ...utils import logging
  
  
  A_														=      logging.get_logger(__name__)
  
  A_														=      {
      'src_vocab_file': 'vocab-src.json',
      'tgt_vocab_file': 'vocab-tgt.json',
      'merges_file': 'merges.txt',
  }
  
  A_														=      {
      'src_vocab_file': {
          'stas/tiny-wmt19-en-de': 'https://huggingface.co/stas/tiny-wmt19-en-de/resolve/main/vocab-src.json'
      },
      'tgt_vocab_file': {
          'stas/tiny-wmt19-en-de': 'https://huggingface.co/stas/tiny-wmt19-en-de/resolve/main/vocab-tgt.json'
      },
      'merges_file': {'stas/tiny-wmt19-en-de': 'https://huggingface.co/stas/tiny-wmt19-en-de/resolve/main/merges.txt'},
  }
  
  A_														=      {'stas/tiny-wmt19-en-de': 1_0_2_4}
  A_														=      {
      'stas/tiny-wmt19-en-de': {
          'langs': ['en', 'de'],
          'model_max_length': 1_0_2_4,
          'special_tokens_map_file': None,
          'full_tokenizer_file': None,
      }
  }
  
  
  
  
  
  
  
  def 							UpperCAmelCase				(     UpperCAmelCase      )->		Any:
  
  
  
  
  
  
  
  					'''simple docstring'''
  
  
  
  					SCREAMING_SNAKE_CASE_	      =       set()
  					SCREAMING_SNAKE_CASE_	      =       word[0]
  					for char in word[1:]:
  										pairs.add((prev_char, char)      )
  										SCREAMING_SNAKE_CASE_	      =       char
  					return pairs
  
  
  
  
  
  
  
  def 							UpperCAmelCase				(     UpperCAmelCase      )->		str:
  
  
  
  
  
  
  
  					'''simple docstring'''
  
  
  
  					SCREAMING_SNAKE_CASE_	      =       text.replace('''，'''				,''','''      )
  					SCREAMING_SNAKE_CASE_	      =       re.sub(R'''。\s*'''				,'''. '''				,UpperCAmelCase      )
  					SCREAMING_SNAKE_CASE_	      =       text.replace('''、'''				,''','''      )
  					SCREAMING_SNAKE_CASE_	      =       text.replace('''”'''				,'''\"'''      )
  					SCREAMING_SNAKE_CASE_	      =       text.replace('''“'''				,'''\"'''      )
  					SCREAMING_SNAKE_CASE_	      =       text.replace('''∶'''				,''':'''      )
  					SCREAMING_SNAKE_CASE_	      =       text.replace('''：'''				,''':'''      )
  					SCREAMING_SNAKE_CASE_	      =       text.replace('''？'''				,'''?'''      )
  					SCREAMING_SNAKE_CASE_	      =       text.replace('''《'''				,'''\"'''      )
  					SCREAMING_SNAKE_CASE_	      =       text.replace('''》'''				,'''\"'''      )
  					SCREAMING_SNAKE_CASE_	      =       text.replace('''）'''				,''')'''      )
  					SCREAMING_SNAKE_CASE_	      =       text.replace('''！'''				,'''!'''      )
  					SCREAMING_SNAKE_CASE_	      =       text.replace('''（'''				,'''('''      )
  					SCREAMING_SNAKE_CASE_	      =       text.replace('''；'''				,''';'''      )
  					SCREAMING_SNAKE_CASE_	      =       text.replace('''１'''				,'''1'''      )
  					SCREAMING_SNAKE_CASE_	      =       text.replace('''」'''				,'''\"'''      )
  					SCREAMING_SNAKE_CASE_	      =       text.replace('''「'''				,'''\"'''      )
  					SCREAMING_SNAKE_CASE_	      =       text.replace('''０'''				,'''0'''      )
  					SCREAMING_SNAKE_CASE_	      =       text.replace('''３'''				,'''3'''      )
  					SCREAMING_SNAKE_CASE_	      =       text.replace('''２'''				,'''2'''      )
  					SCREAMING_SNAKE_CASE_	      =       text.replace('''５'''				,'''5'''      )
  					SCREAMING_SNAKE_CASE_	      =       text.replace('''６'''				,'''6'''      )
  					SCREAMING_SNAKE_CASE_	      =       text.replace('''９'''				,'''9'''      )
  					SCREAMING_SNAKE_CASE_	      =       text.replace('''７'''				,'''7'''      )
  					SCREAMING_SNAKE_CASE_	      =       text.replace('''８'''				,'''8'''      )
  					SCREAMING_SNAKE_CASE_	      =       text.replace('''４'''				,'''4'''      )
  					SCREAMING_SNAKE_CASE_	      =       re.sub(R'''．\s*'''				,'''. '''				,UpperCAmelCase      )
  					SCREAMING_SNAKE_CASE_	      =       text.replace('''～'''				,'''~'''      )
  					SCREAMING_SNAKE_CASE_	      =       text.replace('''’'''				,'''\''''      )
  					SCREAMING_SNAKE_CASE_	      =       text.replace('''…'''				,'''...'''      )
  					SCREAMING_SNAKE_CASE_	      =       text.replace('''━'''				,'''-'''      )
  					SCREAMING_SNAKE_CASE_	      =       text.replace('''〈'''				,'''<'''      )
  					SCREAMING_SNAKE_CASE_	      =       text.replace('''〉'''				,'''>'''      )
  					SCREAMING_SNAKE_CASE_	      =       text.replace('''【'''				,'''['''      )
  					SCREAMING_SNAKE_CASE_	      =       text.replace('''】'''				,''']'''      )
  					SCREAMING_SNAKE_CASE_	      =       text.replace('''％'''				,'''%'''      )
  					return text
  
  
  
  
  
  
  
  def 							UpperCAmelCase				(     UpperCAmelCase      )->		Optional[int]:
  
  
  
  
  
  
  
  					'''simple docstring'''
  
  
  
  					SCREAMING_SNAKE_CASE_	      =       []
  					for char in text:
  										SCREAMING_SNAKE_CASE_	      =       unicodedata.category(UpperCAmelCase      )
  										if cat.startswith('''C'''      ):
  															continue
  										output.append(UpperCAmelCase      )
  					return "".join(UpperCAmelCase      )
  
  
  
  
  
  
  class 						snake_case			(       A__	):
  			'''simple docstring'''
  
  			UpperCAmelCase       :       Dict       = VOCAB_FILES_NAMES
  			UpperCAmelCase       :       Optional[Any]       = PRETRAINED_VOCAB_FILES_MAP
  			UpperCAmelCase       :       Optional[int]       = PRETRAINED_INIT_CONFIGURATION
  			UpperCAmelCase       :       List[str]       = PRETRAINED_POSITIONAL_EMBEDDINGS_SIZES
  			UpperCAmelCase       :       Optional[int]       = ["""input_ids""", """attention_mask"""]
  
  			def __init__(	self     :     str							,							lowerCAmelCase_     :     List[str]=None							,							lowerCAmelCase_     :     Tuple=None							,							lowerCAmelCase_     :     Tuple=None							,							lowerCAmelCase_     :     Dict=None							,							lowerCAmelCase_     :     Any=False							,							lowerCAmelCase_     :     Dict="<unk>"							,							lowerCAmelCase_     :     int="<s>"							,							lowerCAmelCase_     :     Optional[int]="</s>"							,							lowerCAmelCase_     :     Optional[int]="<pad>"							,							**lowerCAmelCase_     :     Dict							,							)					->					Union[str, Any]:
  
  
  
  
  								"""simple docstring"""
  
  
  
  
  
  
  								super().__init__(
  								    langs=_lowerCAmelCase							,							src_vocab_file=_lowerCAmelCase							,							tgt_vocab_file=_lowerCAmelCase							,							merges_file=_lowerCAmelCase							,							do_lower_case=_lowerCAmelCase							,							unk_token=_lowerCAmelCase							,							bos_token=_lowerCAmelCase							,							sep_token=_lowerCAmelCase							,							pad_token=_lowerCAmelCase							,							**_lowerCAmelCase							,							)
  
  								try:
  													import sacremoses
  								except ImportError:
  													raise ImportError(
  													    '''You need to install sacremoses to use XLMTokenizer. '''
  													    '''See https://pypi.org/project/sacremoses/ for installation.'''					)
  
  								SCREAMING_SNAKE_CASE_	      =       sacremoses
  
  								SCREAMING_SNAKE_CASE_	      =       src_vocab_file
  								SCREAMING_SNAKE_CASE_	      =       tgt_vocab_file
  								SCREAMING_SNAKE_CASE_	      =       merges_file
  								SCREAMING_SNAKE_CASE_	      =       do_lower_case
  
  								# cache of sm.MosesPunctNormalizer instance
  								SCREAMING_SNAKE_CASE_	      =       {}
  								# cache of sm.MosesTokenizer instance
  								SCREAMING_SNAKE_CASE_	      =       {}
  								SCREAMING_SNAKE_CASE_	      =       {}
  
  								if langs and len(_lowerCAmelCase					) == 2:
  													SCREAMING_SNAKE_CASE_      ,SCREAMING_SNAKE_CASE_	      =       langs
  								else:
  													raise ValueError(
  													    F'''arg `langs` needs to be a list of 2 langs, e.g. [\'en\', \'ru\'], but got {langs}. '''
  													    '''Usually that means that tokenizer can\'t find a mapping for the given model path '''
  													    '''in PRETRAINED_VOCAB_FILES_MAP, and other maps of this tokenizer.'''					)
  
  								with open(_lowerCAmelCase							,							encoding='''utf-8'''					) as src_vocab_handle:
  													SCREAMING_SNAKE_CASE_	      =       json.load(_lowerCAmelCase					)
  								with open(_lowerCAmelCase							,							encoding='''utf-8'''					) as tgt_vocab_handle:
  													SCREAMING_SNAKE_CASE_	      =       json.load(_lowerCAmelCase					)
  													SCREAMING_SNAKE_CASE_	      =       {v: k for k, v in tgt_vocab.items()}
  								with open(_lowerCAmelCase							,							encoding='''utf-8'''					) as merges_handle:
  													SCREAMING_SNAKE_CASE_	      =       merges_handle.read().split('''\n'''					)[:-1]
  								SCREAMING_SNAKE_CASE_	      =       [tuple(merge.split()[:2]					) for merge in merges]
  								SCREAMING_SNAKE_CASE_	      =       dict(zip(_lowerCAmelCase							,							range(len(_lowerCAmelCase					)					)					)					)
  								SCREAMING_SNAKE_CASE_	      =       {}
  
  			def _lowercase (	self     :     Dict					)					->					str:
  
  
  
  
  								"""simple docstring"""
  
  
  
  
  
  
  								return self.get_src_vocab()
  
  			@property
  			def _lowercase (	self     :     Any					)					->					List[str]:
  
  
  
  
  								"""simple docstring"""
  
  
  
  
  
  
  								return self.src_vocab_size
  
  			def _lowercase (	self     :     Union[str, Any]							,							lowerCAmelCase_     :     Union[str, Any]							,							lowerCAmelCase_     :     Optional[Any]					)					->					List[Any]:
  
  
  
  
  								"""simple docstring"""
  
  
  
  
  
  
  								if lang not in self.cache_moses_punct_normalizer:
  													SCREAMING_SNAKE_CASE_	      =       self.sm.MosesPunctNormalizer(lang=_lowerCAmelCase					)
  													SCREAMING_SNAKE_CASE_	      =       punct_normalizer
  								return self.cache_moses_punct_normalizer[lang].normalize(_lowerCAmelCase					)
  
  			def _lowercase (	self     :     Tuple							,							lowerCAmelCase_     :     str							,							lowerCAmelCase_     :     str					)					->					Dict:
  
  
  
  
  								"""simple docstring"""
  
  
  
  
  
  
  								if lang not in self.cache_moses_tokenizer:
  													SCREAMING_SNAKE_CASE_	      =       self.sm.MosesTokenizer(lang=_lowerCAmelCase					)
  													SCREAMING_SNAKE_CASE_	      =       moses_tokenizer
  								return self.cache_moses_tokenizer[lang].tokenize(
  								    _lowerCAmelCase							,							aggressive_dash_splits=_lowerCAmelCase							,							return_str=_lowerCAmelCase							,							escape=_lowerCAmelCase					)
  
  			def _lowercase (	self     :     Any							,							lowerCAmelCase_     :     str							,							lowerCAmelCase_     :     Dict					)					->					Union[str, Any]:
  
  
  
  
  								"""simple docstring"""
  
  
  
  
  
  
  								if lang not in self.cache_moses_detokenizer:
  													SCREAMING_SNAKE_CASE_	      =       self.sm.MosesDetokenizer(lang=_lowerCAmelCase					)
  													SCREAMING_SNAKE_CASE_	      =       moses_detokenizer
  								return self.cache_moses_detokenizer[lang].detokenize(_lowerCAmelCase					)
  
  			def _lowercase (	self     :     Union[str, Any]							,							lowerCAmelCase_     :     Optional[int]							,							lowerCAmelCase_     :     Tuple					)					->					List[Any]:
  
  
  
  
  								"""simple docstring"""
  
  
  
  
  
  
  								SCREAMING_SNAKE_CASE_	      =       replace_unicode_punct(_lowerCAmelCase					)
  								SCREAMING_SNAKE_CASE_	      =       self.moses_punct_norm(_lowerCAmelCase							,							_lowerCAmelCase					)
  								SCREAMING_SNAKE_CASE_	      =       remove_non_printing_char(_lowerCAmelCase					)
  								return text
  
  			@property
  			def _lowercase (	self     :     int					)					->					List[str]:
  
  
  
  
  								"""simple docstring"""
  
  
  
  
  
  
  								return len(self.encoder					)
  
  			@property
  			def _lowercase (	self     :     int					)					->					Optional[int]:
  
  
  
  
  								"""simple docstring"""
  
  
  
  
  
  
  								return len(self.decoder					)
  
  			def _lowercase (	self     :     Optional[Any]					)					->					Any:
  
  
  
  
  								"""simple docstring"""
  
  
  
  
  
  
  								return dict(self.encoder							,							**self.added_tokens_encoder					)
  
  			def _lowercase (	self     :     int					)					->					str:
  
  
  
  
  								"""simple docstring"""
  
  
  
  
  
  
  								return dict(self.decoder							,							**self.added_tokens_decoder					)
  
  			def _lowercase (	self     :     Union[str, Any]							,							lowerCAmelCase_     :     str					)					->					Optional[Any]:
  
  
  
  
  								"""simple docstring"""
  
  
  
  
  
  
  								SCREAMING_SNAKE_CASE_	      =       tuple(token[:-1]					) + (token[-1] + '''</w>''',)
  								if token in self.cache:
  													return self.cache[token]
  								SCREAMING_SNAKE_CASE_	      =       get_pairs(_lowerCAmelCase					)
  
  								if not pairs:
  													return token + "</w>"
  
  								while True:
  													SCREAMING_SNAKE_CASE_	      =       min(_lowerCAmelCase							,							key=lambda lowerCAmelCase_					: self.bpe_ranks.get(_lowerCAmelCase							,							float('''inf'''					)					)					)
  													if bigram not in self.bpe_ranks:
  																		break
  													SCREAMING_SNAKE_CASE_      ,SCREAMING_SNAKE_CASE_	      =       bigram
  													SCREAMING_SNAKE_CASE_	      =       []
  													SCREAMING_SNAKE_CASE_	      =       0
  													while i < len(_lowerCAmelCase					):
  																		try:
  																							SCREAMING_SNAKE_CASE_	      =       word.index(_lowerCAmelCase							,							_lowerCAmelCase					)
  																		except ValueError:
  																							new_word.extend(word[i:]					)
  																							break
  																		else:
  																							new_word.extend(word[i:j]					)
  																							SCREAMING_SNAKE_CASE_	      =       j
  
  																		if word[i] == first and i < len(_lowerCAmelCase					) - 1 and word[i + 1] == second:
  																							new_word.append(first + second					)
  																							i += 2
  																		else:
  																							new_word.append(word[i]					)
  																							i += 1
  													SCREAMING_SNAKE_CASE_	      =       tuple(_lowerCAmelCase					)
  													SCREAMING_SNAKE_CASE_	      =       new_word
  													if len(_lowerCAmelCase					) == 1:
  																		break
  													else:
  																		SCREAMING_SNAKE_CASE_	      =       get_pairs(_lowerCAmelCase					)
  								SCREAMING_SNAKE_CASE_	      =       ''' '''.join(_lowerCAmelCase					)
  								if word == "\n  </w>":
  													SCREAMING_SNAKE_CASE_	      =       '''\n</w>'''
  								SCREAMING_SNAKE_CASE_	      =       word
  								return word
  
  			def _lowercase (	self     :     Optional[int]							,							lowerCAmelCase_     :     str							,							lowerCAmelCase_     :     str="en"							,							lowerCAmelCase_     :     List[str]=False					)					->					Dict:
  
  
  
  
  								"""simple docstring"""
  
  
  
  
  
  
  								SCREAMING_SNAKE_CASE_	      =       self.src_lang
  
  								if self.do_lower_case:
  													SCREAMING_SNAKE_CASE_	      =       text.lower()
  
  								if bypass_tokenizer:
  													SCREAMING_SNAKE_CASE_	      =       text.split()
  								else:
  													SCREAMING_SNAKE_CASE_	      =       self.moses_pipeline(_lowerCAmelCase							,							lang=_lowerCAmelCase					)
  													SCREAMING_SNAKE_CASE_	      =       self.moses_tokenize(_lowerCAmelCase							,							lang=_lowerCAmelCase					)
  
  								SCREAMING_SNAKE_CASE_	      =       []
  								for token in text:
  													if token:
  																		split_tokens.extend(list(self.bpe(_lowerCAmelCase					).split(''' '''					)					)					)
  
  								return split_tokens
  
  			def _lowercase (	self     :     str							,							lowerCAmelCase_     :     Tuple					)					->					List[Any]:
  
  
  
  
  								"""simple docstring"""
  
  
  
  
  
  
  								return self.encoder.get(_lowerCAmelCase							,							self.encoder.get(self.unk_token					)					)
  
  			def _lowercase (	self     :     List[Any]							,							lowerCAmelCase_     :     List[Any]					)					->					List[str]:
  
  
  
  
  								"""simple docstring"""
  
  
  
  
  
  
  								return self.decoder.get(_lowerCAmelCase							,							self.unk_token					)
  
  			def _lowercase (	self     :     Optional[Any]							,							lowerCAmelCase_     :     Tuple					)					->					Tuple:
  
  
  
  
  								"""simple docstring"""
  
  
  
  
  
  
  								SCREAMING_SNAKE_CASE_	      =       [t.replace(''' '''							,							''''''					).replace('''</w>'''							,							''' '''					) for t in tokens]
  								SCREAMING_SNAKE_CASE_	      =       ''''''.join(_lowerCAmelCase					).split()
  								# detokenize
  								SCREAMING_SNAKE_CASE_	      =       self.moses_detokenize(_lowerCAmelCase							,							self.tgt_lang					)
  								return text
  
  			def _lowercase (	self     :     Optional[Any]							,							lowerCAmelCase_     :     List[int]							,							lowerCAmelCase_     :     Optional[List[int]] = None					)					->					List[str]:
  
  
  
  
  								"""simple docstring"""
  
  
  
  
  
  
  								SCREAMING_SNAKE_CASE_	      =       [self.sep_token_id]
  
  								# no bos used in fairseq
  								if token_ids_a is None:
  													return token_ids_a + sep
  								return token_ids_a + sep + token_ids_a + sep
  
  			def _lowercase (	self     :     List[str]							,							lowerCAmelCase_     :     List[int]							,							lowerCAmelCase_     :     Optional[List[int]] = None							,							lowerCAmelCase_     :     bool = False					)					->					Any:
  
  
  
  
  								"""simple docstring"""
  
  
  
  
  
  
  								if already_has_special_tokens:
  													return super().get_special_tokens_mask(
  													    token_ids_a=_lowerCAmelCase							,							token_ids_a=_lowerCAmelCase							,							already_has_special_tokens=_lowerCAmelCase					)
  								# no bos used in fairseq
  								if token_ids_a is not None:
  													return ([0] * len(_lowerCAmelCase					)) + [1] + ([0] * len(_lowerCAmelCase					)) + [1]
  								return ([0] * len(_lowerCAmelCase					)) + [1]
  
  			def _lowercase (	self     :     Optional[int]							,							lowerCAmelCase_     :     List[int]							,							lowerCAmelCase_     :     Optional[List[int]] = None					)					->					Any:
  
  
  
  
  								"""simple docstring"""
  
  
  
  
  
  
  								SCREAMING_SNAKE_CASE_	      =       [self.sep_token_id]
  
  								# no bos used in fairseq
  								if token_ids_a is None:
  													return len(token_ids_a + sep					) * [0]
  								return len(token_ids_a + sep					) * [0] + len(token_ids_a + sep					) * [1]
  
  			def _lowercase (	self     :     Optional[Any]							,							lowerCAmelCase_     :     str							,							lowerCAmelCase_     :     Optional[str] = None					)					->					Tuple:
  
  
  
  
  								"""simple docstring"""
  
  
  
  
  
  
  								if not os.path.isdir(_lowerCAmelCase					):
  													logger.error(F'''Vocabulary path ({save_directory}) should be a directory'''					)
  													return
  
  								SCREAMING_SNAKE_CASE_	      =       os.path.join(
  								    _lowerCAmelCase							,							(filename_prefix + '''-''' if filename_prefix else '''''') + VOCAB_FILES_NAMES['''src_vocab_file''']					)
  								SCREAMING_SNAKE_CASE_	      =       os.path.join(
  								    _lowerCAmelCase							,							(filename_prefix + '''-''' if filename_prefix else '''''') + VOCAB_FILES_NAMES['''tgt_vocab_file''']					)
  								SCREAMING_SNAKE_CASE_	      =       os.path.join(
  								    _lowerCAmelCase							,							(filename_prefix + '''-''' if filename_prefix else '''''') + VOCAB_FILES_NAMES['''merges_file''']					)
  
  								with open(_lowerCAmelCase							,							'''w'''							,							encoding='''utf-8'''					) as f:
  													f.write(json.dumps(self.encoder							,							indent=2							,							sort_keys=_lowerCAmelCase							,							ensure_ascii=_lowerCAmelCase					) + '''\n'''					)
  
  								with open(_lowerCAmelCase							,							'''w'''							,							encoding='''utf-8'''					) as f:
  													SCREAMING_SNAKE_CASE_	      =       {v: k for k, v in self.decoder.items()}
  													f.write(json.dumps(_lowerCAmelCase							,							indent=2							,							sort_keys=_lowerCAmelCase							,							ensure_ascii=_lowerCAmelCase					) + '''\n'''					)
  
  								SCREAMING_SNAKE_CASE_	      =       0
  								with open(_lowerCAmelCase							,							'''w'''							,							encoding='''utf-8'''					) as writer:
  													for bpe_tokens, token_index in sorted(self.bpe_ranks.items()							,							key=lambda lowerCAmelCase_					: kv[1]					):
  																		if index != token_index:
  																							logger.warning(
  																							    F'''Saving vocabulary to {merges_file}: BPE merge indices are not consecutive.'''
  																							    ''' Please check that the tokenizer is not corrupted!'''					)
  																							SCREAMING_SNAKE_CASE_	      =       token_index
  																		writer.write(''' '''.join(_lowerCAmelCase					) + '''\n'''					)
  																		index += 1
  
  								return src_vocab_file, tgt_vocab_file, merges_file
  
  			def __getstate__(	self     :     List[Any]					)					->					str:
  
  
  
  
  								"""simple docstring"""
  
  
  
  
  
  
  								SCREAMING_SNAKE_CASE_	      =       self.__dict__.copy()
  								SCREAMING_SNAKE_CASE_	      =       None
  								return state
  
  
  
  
  			def __setstate__(	self     :     Optional[int]							,							lowerCAmelCase_     :     Tuple					)					->					int:
  
  
  
  
  								"""simple docstring"""
  
  
  
  
  
  
  								SCREAMING_SNAKE_CASE_	      =       d
  
  								try:
  													import sacremoses
  								except ImportError:
  													raise ImportError(
  													    '''You need to install sacremoses to use XLMTokenizer. '''
  													    '''See https://pypi.org/project/sacremoses/ for installation.'''					)
  
  								SCREAMING_SNAKE_CASE_	      =       sacremoses
  
  
  
style_context: 
  
  
  from __future__ import annotations
  
  class 						snake_case			:
  			'''simple docstring'''
  
  			def __init__(	self     :     int							,							lowerCAmelCase_     :     int					)					->					None:
  
  
  
  
  								"""simple docstring"""
  
  
  
  
  
  
  								SCREAMING_SNAKE_CASE_	      =       value
  								SCREAMING_SNAKE_CASE_	      =       None
  								SCREAMING_SNAKE_CASE_	      =       None
  
  class 						snake_case			:
  			'''simple docstring'''
  
  			UpperCAmelCase       :       int
  
  			def __init__(	self     :     Union[str, Any]					)					->					None:
  
  
  
  
  								"""simple docstring"""
  
  
  
  
  
  
  								SCREAMING_SNAKE_CASE_	      =       0
  
  			def _lowercase (	self     :     Optional[int]							,							lowerCAmelCase_     :     Node | None							,							lowerCAmelCase_     :     int					)					->					None:
  
  
  
  
  								"""simple docstring"""
  
  
  
  
  
  
  								if node is None:
  													return
  
  								if path_sum == self.target:
  													self.paths += 1
  
  								if node.left:
  													self.depth_first_search(node.left							,							path_sum + node.left.value					)
  								if node.right:
  													self.depth_first_search(node.right							,							path_sum + node.right.value					)
  
  
  
  
  			def _lowercase (	self     :     str							,							lowerCAmelCase_     :     Node | None							,							lowerCAmelCase_     :     int | None = None					)					->					int:
  
  
  
  
  								"""simple docstring"""
  
  
  
  
  
  
  								if node is None:
  													return 0
  								if target is not None:
  													SCREAMING_SNAKE_CASE_	      =       target
  
  								self.depth_first_search(lowerCAmelCase_							,							node.value					)
  								self.path_sum(node.left					)
  								self.path_sum(node.right					)
  
  								return self.paths
  
  
  if __name__ == "__main__":
  		import doctest
  
  		doctest.testmod()
  
  
  