input: Write a python function to get the maximum value from a dictionary.
  assert get_max_value({"Potato": 1, "Onion": 3, "Carrot": 2}) == 3
  assert get_max_value({"Apple": 10, "Banana": 5, "Orange": 8}) == 10
  assert get_max_value({"a": -1, "b": -2, "c": -3}) == -1
output: def get_max_value(d):
      return max(d.values())