input: Write a function that prints out the largest value from a given list of numbers.
  
  def get_max_value(numbers): 
      return max(numbers)
  
  assert get_max_value([2, 4, 1, 6]) == 6
  assert get_max_value([5, 3, 7, 9]) == 9
  assert get_max_value([10, 10, 10, 10]) == 10
  assert get_max_value([]) == None
output: def get_max_value(numbers): 
      if not numbers:
          return None
      return max(numbers)