外部类python的调用方法

Question

我对Python和OOP比较陌生，我试图用类写一个迷你冒险游戏，并且被困在我的BattleEngine类中。 这个想法是有选择根据你的角色和对手的实力和智慧来对抗或战胜对手。 我得到一个错误，当我尝试打电话给我的攻击方法在这里：

class Armory(Scene): 

    def enter(self): 
     print "This room appears to be some kind of armory. There are shelves full of weaponry lining" 
     print "the walls. You walk around admiring the shiny weapons, you reach out to pick up a" 
     print "massive battleaxe. Right as your fingers touch it you hear voices from behind the" 
     print "next door. They sound like they're getting closer. As the voices grow nearer you must make" 
     print "a decision. Will you stand and fight (enter 'fight') or will you use your wit to outsmart" 
     print "your opponent(enter 'wit')?" 
     decision = raw_input("> ") 
     battle = BattleEngine() 
     if decision == "fight": 
      attack(self, Player.strength, 3) 
      if player_wins: 
       print "A man in light armour walks in and sees you with your sword drawn. A look of" 
       print "shock and disbelief is on his face. You act quickly and lunge at him." 
       print "The soldier struggles to unsheath his sword as you run him through." 
       print "He collapses to the ground wearing the same look of disbelief." 
       print "Your strength has increased by 1." 
       Player.strength += 1 
     elif decision == "wit": 
      outwit(self, Player.wit, 3)  

这里就是我定义我的BattleEngine类：

class BattleEngine(object): 

    def attack(self, player_strength, nonplayer_strength): 
     player_roll = randint(1,6) 
     nonplayer_roll = randint(1,6) 
     if (player_roll + player_strength) >= (nonplayer_roll + nonplayer_strength): 
      return player_wins 
     else: 
      return 'death' 

    def outwit(self, player_wit, nonplayer_wit): 
     player_roll = randint(1,6) 
     nonplayer_roll = randint(1,6) 
     if (player_roll + player_wit) >= (nonplayer_roll + nonplayer_wit): 
      return player_wins 
     else: 
      return 'death'  

一旦我在我的程序这一点是接收错误：'攻击全局名称未定义' 我不确定我在做什么错误。任何帮助将是太棒了！

Answer 1

你需要调用attack上您BattleEngine实例，你不需要在self经过：

battle = BattleEngine() 
if decision == "fight": 
    player_wins = battle.attack(Player.strength, 3) 

请注意，您需要接收.attack()方法的返回值。

这同样适用于.outwit()方法还上：

elif decision == "wit": 
    player_wins = battle.outwit(Player.wit, 3)  

你可能需要修复的.attack()和.outwit()方法的返回值;而不是return player_wins和return 'death'，可能返回True或False。

self参数是由Python为您照顾的，并会参考具体的BattleEngine实例。

不是说你真的需要这里的类，你的BattleEngine()类当前没有每个实例的状态，例如。在任何方法中，您都不使用self，因为实例上没有任何内容可以将指定为。