input: Write a function in Python 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([-1, -5, -3, -2])==-1
  assert get_max_value([0, 0, 0, 0])==0
  assert get_max_value([10, 20, 30, 40])==40
  assert get_max_value([])==None
output: def get_max_value(numbers): 
      if not numbers:
          return None
      return max(numbers)