'''simple docstring'''







from __future__ import annotations

SCREAMING_SNAKE_CASE_      =			{
    "A": ["B", "C", "E"],
    "B": ["A", "D", "E"],
    "C": ["A", "F", "G"],
    "D": ["B"],
    "E": ["A", "B", "D"],
    "F": ["C"],
    "G": ["C"],
}


class  lowerCAmelCase_						:





  """simple docstring"""



  def __init__(					self     :							Optional[int]				,							SCREAMING_SNAKE_CASE__     :							str				,							SCREAMING_SNAKE_CASE__     :							Union[str, Any]						):





       '''simple docstring'''

       __a       =   graph
       # mapping node to its parent in resulting breadth first tree
       __a       =   {}
       __a       =   source_vertex

  def __a						(					self     :							Union[str, Any]						):





       '''simple docstring'''

       __a       =   {self.source_vertex}
       __a       =   None
       __a       =   [self.source_vertex]  # first in first out queue

       while queue:
            __a       =   queue.pop(0						)
            for adjacent_vertex in self.graph[vertex]:
                 if adjacent_vertex not in visited:
                      visited.add(A_						)
                      __a       =   vertex
                      queue.append(A_						)


  def __a						(					self     :							Dict				,							SCREAMING_SNAKE_CASE__     :							Dict						):





       '''simple docstring'''

       if target_vertex == self.source_vertex:
            return self.source_vertex

       __a       =   self.parent.get(A_						)
       if target_vertex_parent is None:
            __a       =   (
                f'''No path from vertex: {self.source_vertex} to vertex: {target_vertex}'''
            )
            raise ValueError(A_						)

       return self.shortest_path(A_						) + f'''->{target_vertex}'''


if __name__ == "__main__":
 SCREAMING_SNAKE_CASE_      =			Graph(graph, 'G')
 g.breath_first_search()
 print(g.shortest_path('D'))
 print(g.shortest_path('G'))
 print(g.shortest_path('Foo'))










'''simple docstring'''







from __future__ import annotations




def        __lowercase						(      __SCREAMING_SNAKE_CASE				,  __SCREAMING_SNAKE_CASE				,  __SCREAMING_SNAKE_CASE				,  )				->					tuple[str, float]:
     """simple docstring"""




     if (stress, tangential_force, area).count(0		) != 1:
          raise ValueError("""You cannot supply more or less than 2 values"""		)
     elif stress < 0:
          raise ValueError("""Stress cannot be negative"""		)
     elif tangential_force < 0:
          raise ValueError("""Tangential Force cannot be negative"""		)
     elif area < 0:
          raise ValueError("""Area cannot be negative"""		)
     elif stress == 0:
          return (
              "stress",
              tangential_force / area,
          )
     elif tangential_force == 0:
          return (
              "tangential_force",
              stress * area,
          )
     else:
          return (
              "area",
              tangential_force / stress,
          )


if __name__ == "__main__":
 import doctest

 doctest.testmod()






