input:                         
  def find_max(numbers: List[int]) -> int: 
      """ Find the maximum number from a list of non-negative integers.
      >>> find_max([1, 3, 12, 5, 8, 10])
      12
      """
      max_num = 0
      for i in numbers: 
          if i > max_num: 
              max_num = i
      
      return max_num
output:     max_num = 0
      for i in numbers: 
          if i > max_num: 
              max_num = i
      
      return max_num