new_contents: '''
  Swap digits
  Given a two-digit number, swap its digits. If the returned value is less than 10, do not include the leading zero.
  '''
  
  import doctest
  
  def swap_digits(n):
      """
      (int -> list of ints)
      :param n: int
      :return: int
      >>> swap_digits(23)
      32
      >>> swap_digits(60)
      6
  
      Enter your code below
      """
  
      return n
  
  if __name__ == "__main__":
      doctest.testmod()
  
  print(swap_digits(45))
subject: Create swap_digits.py