input: 
  def rewrite_with_comprehension() -> List[int]:
      """ Rewrite the following Python code by introducing list comprehensions.
      Original code:
      even_numbers = []
      for i in range(1,21):
          if i % 2 == 0:
              even_numbers.append(i)
      >>> rewrite_with_comprehension()
      [2, 4, 6, 8, 10, 12, 14, 16, 18, 20]
      """
  
output:     return [i for i in range(1, 21) if i % 2 == 0]