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([10, 3, 8, 1]) == 10
  assert get_max_value([5, 5, 5, 5]) == 5
  assert get_max_value([-1, -5, -2, -3]) == -1
  assert get_max_value([]) == None
output: def get_max_value(numbers): 
      if not numbers:
          return None
      return max(numbers)