test.py

def get_input():
    command = input(": ").split()
    verb_word = command[0]
    if verb_word in verb_dict:
        verb = verb_dict[verb_word]
    else:
        print("Unknown verb {}". format(verb_word))
        return

    if len(command) >= 2:
        noun_word = command[1:]
        print (verb(' '.join(noun_word)))
    else:
        print(verb())

class GameObject:
    class_name = ""
    desc = ""
    objects = {}

    def __init__(self, name):
        self.name = name
        GameObject.objects[self.class_name] = self
    def get_desc(self):
        return self.class_name + "\n" + self.desc

class Goblin(GameObject):

    def __init__(self, name):
        self.class_name = "goblin"
        self.health = 3
        self._desc = " A foul creature"
        super().__init__(name)

    @property
    def desc(self):
        if self.health >=3:
            return self._desc
        elif self.health == 2:
            health_line = "It has a wound on its knee."
        elif self.health == 1:
            health_line = "Its left arm has been cut off!"
        elif self.health <= 0:
            health_line = "It is dead."
        return self._desc + "\n" + health_line
    @desc.setter
    def desc(self, value):
        self._desc = value


def hit(noun):
  if noun in GameObject.objects:
    thing = GameObject.objects[noun]
    if type(thing) == Goblin:
      thing.health = thing.health - 1
      if thing.health <= 0:
        msg = "You killed the goblin!"
      else:
        msg = "You hit the {}".format(thing.class_name)
  else:
    msg ="There is no {} here.".format(noun)
  return msg

goblin = Goblin("Gobbly")


def examine(noun):
  if noun in GameObject.objects:
    return GameObject.objects[noun].get_desc()
  else:
    return "There is no {} here.".format(noun)

def say(noun):
  return 'You said {}'.format(noun)

def run(noun):
  return 'You run {}'.format(noun)

verb_dict = {
  "say": say, "hit": hit, "examine":examine
}

while True:
  get_input()