
'''simple docstring'''



from __future__ import annotations

from collections.abc import Iterator
from typing import Generic, TypeVar

_lowercase          =						TypeVar("""T""")




class     UpperCAmelCase_	(						Generic[T]					):






						'''simple docstring'''






						def __init__(   self       ,  _lowercase ):

												"""simple docstring"""



												_lowerCAmelCase    		=					data
												_lowerCAmelCase    		=					None




						def __str__(   self ):

												"""simple docstring"""



												return F'{self.data}'






class     UpperCAmelCase_	(						Generic[T]					):






						'''simple docstring'''






						def __init__(   self ):

												"""simple docstring"""



												_lowerCAmelCase    		=					None




						def __iter__(   self ):

												"""simple docstring"""



												_lowerCAmelCase    		=					self.top
												while node:
																		yield node.data
																		_lowerCAmelCase    		=					node.next




						def __str__(   self ):

												"""simple docstring"""



												return "->".join([str(lowerCamelCase_ ) for item in self] )




						def __len__(   self ):

												"""simple docstring"""



												return len(tuple(iter(self ) ) )




						def    _lowercase      (   self ):

												"""simple docstring"""



												return self.top is None




						def    _lowercase      (   self       ,  _lowercase ):

												"""simple docstring"""



												_lowerCAmelCase    		=					Node(lowerCamelCase_ )
												if not self.is_empty():
																		_lowerCAmelCase    		=					self.top
												_lowerCAmelCase    		=					node




						def    _lowercase      (   self ):

												"""simple docstring"""



												if self.is_empty():
																		raise IndexError("""pop from empty stack""" )
												assert isinstance(self.top       ,  lowerCamelCase_ )
												_lowerCAmelCase    		=					self.top
												_lowerCAmelCase    		=					self.top.next
												return pop_node.data




						def    _lowercase      (   self ):

												"""simple docstring"""



												if self.is_empty():
																		raise IndexError("""peek from empty stack""" )

												assert self.top is not None
												return self.top.data




						def    _lowercase      (   self ):

												"""simple docstring"""



												_lowerCAmelCase    		=					None


if __name__ == "__main__":
						from doctest import testmod

						testmod()

'''simple docstring'''

from dataclasses import dataclass, field
from typing import ClassVar, Dict

from ..features import Features, Sequence, Value
from .base import TaskTemplate


@dataclass(frozen=lowerCAmelCase )
class 					_lowercase						(   lowerCAmelCase ):
      '''simple docstring'''


      UpperCAmelCase_   :   str   				= field(default='''question-answering-extractive'''		,metadata={'''include_in_asdict_even_if_is_default''': True} )
      UpperCAmelCase_   :   ClassVar[Features]   				= Features({'''question''': Value('''string''' ), '''context''': Value('''string''' )} )
      UpperCAmelCase_   :   ClassVar[Features]   				= Features(
          {
              '''answers''': Sequence(
                  {
                      '''text''': Value('''string''' ),
                      '''answer_start''': Value('''int32''' ),
                  } )
          } )
      UpperCAmelCase_   :   str   				= "question"
      UpperCAmelCase_   :   str   				= "context"
      UpperCAmelCase_   :   str   				= "answers"




      @property
      def 		lowerCAmelCase__       (					self				)      ->      Dict[str, str]:



         '''simple docstring'''



         return {self.question_column: "question", self.context_column: "context", self.answers_column: "answers"}




