input: Write a function to print out the largest value from a given list of numbers.
  def get_max_value(numbers): 
      return max(numbers)
  
  print(get_max_value([2, 4, 1, 6]))  # 6
  print(get_max_value([0, 4, 9, 3]))  # 9
  print(get_max_value([11, 2, 2, 8]))  # 11
  print(get_max_value([7, 7, 7, 7]))  # 7
  print(get_max_value([]))  # None
output: def get_max_value(numbers): 
      if not numbers:
          return None
      return max(numbers)