
"""simple docstring"""





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

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


@dataclass(frozen=lowercase__      )
class A_	(lowercase__      ):




  '''simple docstring'''
  # `task` is not a ClassVar since we want it to be part of the `asdict` output for JSON serialization
  SCREAMING_SNAKE_CASE__			:						str       =		field(default="""question-answering-extractive"""				,metadata={"""include_in_asdict_even_if_is_default""": True}      )
  SCREAMING_SNAKE_CASE__			:						ClassVar[Features]       =		Features({"""question""": Value("""string"""      ), """context""": Value("""string"""      )}      )
  SCREAMING_SNAKE_CASE__			:						ClassVar[Features]       =		Features(
      {
          """answers""": Sequence(
              {
                  """text""": Value("""string"""      ),
                  """answer_start""": Value("""int32"""      ),
              }      )
      }      )
  SCREAMING_SNAKE_CASE__			:						str       =		"question"
  SCREAMING_SNAKE_CASE__			:						str       =		"context"
  SCREAMING_SNAKE_CASE__			:						str       =		"answers"







  @property
  def        UpperCamelCase__					(		self  ):

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




"""simple docstring"""





from __future__ import annotations







def 	__a     (		__lowerCamelCase,		__lowerCamelCase  ):
   UpperCAmelCase_     ,   UpperCAmelCase_					:					str			     =    set(__lowerCamelCase  ), [start]

   while stack:
      UpperCAmelCase_					:					Any			     =    stack.pop()
      explored.add(__lowerCamelCase  )
      # Differences from BFS:
      # 1) pop last element instead of first one
      # 2) add adjacent elements to stack without exploring them
      for adj in reversed(graph[v]  ):
         if adj not in explored:
            stack.append(__lowerCamelCase  )
   return explored


_a		       =							{
    'A': ['B', 'C', 'D'],
    'B': ['A', 'D', 'E'],
    'C': ['A', 'F'],
    'D': ['B', 'D'],
    'E': ['B', 'F'],
    'F': ['C', 'E', 'G'],
    'G': ['F'],
}

if __name__ == "__main__":
    import doctest

    doctest.testmod()
    print(depth_first_search(G, 'A'))


