code: 
  
  """simple docstring"""
  
  
  
  
  from __future__ import annotations
  
  from collections import deque
  from queue import Queue
  from timeit import timeit
  
  __A  :					str												=	{
      'A': ['B', 'C'],
      'B': ['A', 'D', 'E'],
      'C': ['A', 'F'],
      'D': ['B'],
      'E': ['B', 'F'],
      'F': ['C', 'E'],
  }
  def      __SCREAMING_SNAKE_CASE		(		lowercase__    ,							lowercase__   ):
  					"""simple docstring"""
  					A    =      {start}
  					A    =      [start]
  					A    =      Queue()
  					queue.put(lowercase__   )
  					while not queue.empty():
  										A    =      queue.get()
  										for w in graph[v]:
  															if w not in explored:
  																				explored.add(lowercase__   )
  																				result.append(lowercase__   )
  																				queue.put(lowercase__   )
  					return result
  def      __SCREAMING_SNAKE_CASE		(		lowercase__    ,							lowercase__   ):
  					"""simple docstring"""
  					A    =      {start}
  					A    =      [start]
  					A    =      deque([start]   )
  					while queue:
  										A    =      queue.popleft()
  										for child in graph[v]:
  															if child not in visited:
  																				visited.add(lowercase__   )
  																				result.append(lowercase__   )
  																				queue.append(lowercase__   )
  					return result
  def      __SCREAMING_SNAKE_CASE		(		lowercase__   ):
  					"""simple docstring"""
  					A    =      F"""from __main__ import G, {name}"""
  					A    =      10_000
  					A    =      timeit(F"""{name}(G, 'A')"""    ,							setup=lowercase__    ,							number=lowercase__   )
  					print(F"""{name:<35} finished {number} runs in {res:.5f} seconds"""   )
  
  
  if __name__ == "__main__":
  	import doctest
  
  	doctest.testmod()
  
  	benchmark_function('breadth_first_search')
  	benchmark_function('breadth_first_search_with_deque')
  	# breadth_first_search                finished 10000 runs in 0.20999 seconds
  	# breadth_first_search_with_deque     finished 10000 runs in 0.01421 seconds
  
  
  
  
  
  
style_context: 
  
  """simple docstring"""
  
  
  
  
  def      __SCREAMING_SNAKE_CASE		(		lowercase__   ):
  					"""simple docstring"""
  					if not isinstance(lowercase__    ,							lowercase__   ):
  										raise ValueError("double_factorial() only accepts integral values"   )
  					if n < 0:
  										raise ValueError("double_factorial() not defined for negative values"   )
  					return 1 if n <= 1 else n * double_factorial(n - 2   )
  
  
  if __name__ == "__main__":
  	import doctest
  
  	doctest.testmod()
  
  
  
  
  
  