input: 
  def find_divisors(num: int) -> str:
      """
      Given a number, returns a string listing all the divisors of the number.
      
      Example:
      >>> find_divisors(12)
      'The divisors of 12 are: 1, 2, 3, 4, 6, 12'
      >>> find_divisors(7)
      'The divisors of 7 are: 1, 7'
      """
      divisors = [str(i) for i in range(1, num + 1) if num % i == 0]
      return f'The divisors of {num} are: {", ".join(divisors)}'
  
output:     divisors = [str(i) for i in range(1, num + 1) if num % i == 0]
      return f'The divisors of {num} are: {", ".join(divisors)}'