input: 
  def double_numbers():
      """ Generate a Python program that prints out every number from 0 to 10, but with every number being multiplied by 2.
      >>> for i in double_numbers(): print(i)
      0
      2
      4
      6
      8
      10
      12
      14
      16
      18
      20
      """
      return [i * 2 for i in range(11)]
  
output:     return [i * 2 for i in range(11)]