


'''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					:				List[str]									=		None


__SCREAMING_SNAKE_CASE					:				Tuple									=		logging.get_logger(__name__)


__SCREAMING_SNAKE_CASE					:				Tuple									=		"""▁"""

__SCREAMING_SNAKE_CASE					:				Union[str, Any]									=		{"""vocab_file""": """spiece.model""", """tokenizer_file""": """tokenizer.json"""}

__SCREAMING_SNAKE_CASE					:				Dict									=		{
    """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					:				str									=		{
    """google/pegasus-xsum""": 512,
}






class 					__lowerCAmelCase   (   snake_case__						):

						"""simple docstring"""






						_UpperCAmelCase		:       List[Any]   						=VOCAB_FILES_NAMES
						_UpperCAmelCase		:       int   						=PRETRAINED_VOCAB_FILES_MAP
						_UpperCAmelCase		:       Any   						=PRETRAINED_POSITIONAL_EMBEDDINGS_SIZES
						_UpperCAmelCase		:       Any   						=PegasusTokenizer
						_UpperCAmelCase		:       Tuple   						=['input_ids', 'attention_mask']






						def __init__(  self							:      List[str] ,  lowerCAmelCase							:      List[Any]=None ,  lowerCAmelCase							:      Optional[Any]=None ,  lowerCAmelCase							:      Any="<pad>" ,  lowerCAmelCase							:      List[Any]="</s>" ,  lowerCAmelCase							:      Optional[Any]="<unk>" ,  lowerCAmelCase							:      Any="<mask_2>" ,  lowerCAmelCase							:      Any="<mask_1>" ,  lowerCAmelCase							:      Any=None ,  lowerCAmelCase							:      Any=1_03 ,  **lowerCAmelCase							:      int ,  ):
													A_			    =		offset

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

																				A_			    =		(
																				    ([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(lowerCAmelCase	) ,  self.offset - 1	)
																				]

																				if len(set(lowerCAmelCase	)	) != len(lowerCAmelCase	):
																											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}."	)
																				A_			    =		additional_special_tokens_extended
													else:
																				A_			    =		[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__(
													    lowerCAmelCase ,  tokenizer_file=lowerCAmelCase ,  pad_token=lowerCAmelCase ,  eos_token=lowerCAmelCase ,  unk_token=lowerCAmelCase ,  mask_token=lowerCAmelCase ,  mask_token_sent=lowerCAmelCase ,  offset=lowerCAmelCase ,  additional_special_tokens=lowerCAmelCase ,  **lowerCAmelCase ,  )
													A_			    =		vocab_file
													A_			    =		False if not self.vocab_file else True






						def 				_UpperCAmelCase       (  self							:      List[str] ,  lowerCAmelCase							:      Union[str, Any]	):
													A_			    =		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 				_UpperCAmelCase       (  self							:      Dict ,  lowerCAmelCase							:      List ,  lowerCAmelCase							:      Optional[List] = None ,  lowerCAmelCase							:      bool = False	):
													if already_has_special_tokens:
																				return self._special_token_mask(lowerCAmelCase	)
													elif token_ids_a is None:
																				return self._special_token_mask(lowerCAmelCase	) + [1]
													else:
																				return self._special_token_mask(token_ids_a + token_ids_a	) + [1]






						def 				_UpperCAmelCase       (  self							:      Optional[int] ,  lowerCAmelCase							:      List[Any] ,  lowerCAmelCase							:      Optional[Any]=None	):
													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 				_UpperCAmelCase       (  self							:      int ,  lowerCAmelCase							:      str ,  lowerCAmelCase							:      Optional[str] = None	):
													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(lowerCAmelCase	):
																				logger.error(F"Vocabulary path ({save_directory}) should be a directory"	)
																				return
													A_			    =		os.path.join(
													    lowerCAmelCase ,  (filename_prefix + "-" if filename_prefix else "") + VOCAB_FILES_NAMES["vocab_file"]	)

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

													return (out_vocab_file,)












def 		_SCREAMING_SNAKE_CASE     ( lowerCAmelCase__						):
		lowerCamelCase_	:     Union[str, Any] 						=      []
		lowerCamelCase_	:     Tuple 						=      []
		lowerCamelCase_	:     Dict 						=      {
		    '^': 3,
		    '*': 2,
		    '/': 2,
		    '%': 2,
		    '+': 1,
		    '-': 1,
		}  # Priority of each operator
		lowerCamelCase_	:     Optional[int] 						=      len(lowerCAmelCase__						) if (len(lowerCAmelCase__						) > 7) else 7

		# Print table header for output
		print(
		    'Symbol'.center(8						)							,'Stack'.center(lowerCAmelCase__						)							,'Postfix'.center(lowerCAmelCase__						)							,sep=' | '							,)
		print('-' * (print_width * 3 + 7)						)

		for x in infix:
				if x.isalpha() or x.isdigit():
						post_fix.append(lowerCAmelCase__						)  # if x is Alphabet / Digit, add it to Postfix
				elif x == "(":
						stack.append(lowerCAmelCase__						)  # if x is "(" push to Stack
				elif x == ")":  # if x is ")" pop stack until "(" is encountered
						while stack[-1] != "(":
								post_fix.append(stack.pop()						)  # Pop stack & add the content to Postfix
						stack.pop()
				else:
						if len(lowerCAmelCase__						) == 0:
								stack.append(lowerCAmelCase__						)  # If stack is empty, push x to stack
						else:  # while priority of x is not > priority of element in the stack
								while len(lowerCAmelCase__						) > 0 and priority[x] <= priority[stack[-1]]:
										post_fix.append(stack.pop()						)  # pop stack & add to Postfix
								stack.append(lowerCAmelCase__						)  # push x to stack

				print(
				    x.center(8						)							,(''.join(lowerCAmelCase__						)).ljust(lowerCAmelCase__						)							,(''.join(lowerCAmelCase__						)).ljust(lowerCAmelCase__						)							,sep=' | '							,)  # Output in tabular format

		while len(lowerCAmelCase__						) > 0:  # while stack is not empty
				post_fix.append(stack.pop()						)  # pop stack & add to Postfix
				print(
				    ' '.center(8						)							,(''.join(lowerCAmelCase__						)).ljust(lowerCAmelCase__						)							,(''.join(lowerCAmelCase__						)).ljust(lowerCAmelCase__						)							,sep=' | '							,)  # Output in tabular format

		return "".join(lowerCAmelCase__						)  # return Postfix as str


def 		_SCREAMING_SNAKE_CASE     ( lowerCAmelCase__						):
		lowerCamelCase_	:     Dict 						=      list(infix[::-1]						)  # reverse the infix equation

		for i in range(len(lowerCAmelCase__						)						):
				if infix[i] == "(":
						lowerCamelCase_	:     str 						=      ')'  # change "(" to ")"
				elif infix[i] == ")":
						lowerCamelCase_	:     Optional[Any] 						=      '('  # change ")" to "("

		return (infix_2_postfix(''.join(lowerCAmelCase__						)						))[
		    ::-1
		]  # call infix_2_postfix on Infix, return reverse of Postfix


if __name__ == "__main__":
		_lowercase		:  int			       =input("""\nEnter an Infix Equation = """)  # Input an Infix equation
		_lowercase		:  Optional[Any]			       ="""""".join(Infix.split())  # Remove spaces from the input
		print("""\n\t""", Infix, """(Infix) -> """, infix_2_prefix(Infix), """(Prefix)""")
