input: 
  def squared_values(numbers: List[int]) -> List[int]:
      """ Create a Python list comprehension to get the squared values of a given list.
      >>> squared_values([1, 2, 3, 5, 8, 13])
      [1, 4, 9, 25, 64, 169]
      """
      return [x*x for x in numbers]
  
output:     return [x*x for x in numbers]