'''simple docstring'''





SCREAMING_SNAKE_CASE_:     Tuple  ={'a': ['c', 'b'], 'b': ['d', 'e'], 'c': [], 'd': [], 'e': []}
SCREAMING_SNAKE_CASE_:     List[str]  =['a', 'b', 'c', 'd', 'e']





def 	lowerCAmelCase_				(					snake_case_       : List[str]					,    snake_case_       : Optional[Any]					,    snake_case_       : Tuple			)    ->      Optional[int]:


     '''simple docstring'''




     UpperCAmelCase_           =   start
     # add current to visited
     visited.append(snake_case_			)
     UpperCAmelCase_           =   edges[current]
     for neighbor in neighbors:
          # if neighbor not in visited, visit
          if neighbor not in visited:
               UpperCAmelCase_           =   topological_sort(snake_case_					,    snake_case_					,    snake_case_			)
    # if all neighbors visited add current to sort
     sort.append(snake_case_			)
     # if all vertices haven't been visited select a new one to visit
     if len(snake_case_			) != len(snake_case_			):
          for vertice in vertices:
               if vertice not in visited:
                    UpperCAmelCase_           =   topological_sort(snake_case_					,    snake_case_					,    snake_case_			)
    # return sort
     return sort


if __name__ == "__main__":
    SCREAMING_SNAKE_CASE_:     List[Any]  =topological_sort('a', [], [])
    print(sort)









"""simple docstring"""







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

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







@dataclass(frozen=lowercase_  )
class       UpperCamelCase__   (	lowercase_  ):




      """simple docstring"""




      _SCREAMING_SNAKE_CASE  				=     field(default="""summarization""",					metadata={"""include_in_asdict_even_if_is_default""": True}  )
      _SCREAMING_SNAKE_CASE  				=     Features({"""text""": Value("""string"""  )}  )
      _SCREAMING_SNAKE_CASE  				=     Features({"""summary""": Value("""string"""  )}  )
      _SCREAMING_SNAKE_CASE  				=     "text"
      _SCREAMING_SNAKE_CASE  				=     "summary"



      @property
      def      SCREAMING_SNAKE_CASE__ (      self				:      Dict       ):
        return {self.text_column: "text", self.summary_column: "summary"}





