外部類python的調用方法

Question

我對Python和OOP比較陌生，我試圖用類寫一個迷你冒險遊戲，並且被困在我的BattleEngine類中。 這個想法是有選擇根據你的角色和對手的實力和智慧來對抗或戰勝對手。 我得到一個錯誤，當我嘗試打電話給我的攻擊方法在這裏：

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)  

這裏就是我定義我的BattleEngine類：

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'  

一旦我在我的程序這一點是接收錯誤：'攻擊全局名稱未定義' 我不確定我在做什麼錯誤。任何幫助將是太棒了！

Answer 1

你需要調用attack上您BattleEngine實例，你不需要在self經過：

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

請注意，您需要接收.attack()方法的返回值。

這同樣適用於.outwit()方法還上：

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

你可能需要修復的.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參數是由Python爲您照顧的，並會參考具體的BattleEngine實例。

不是說你真的需要這裏的類，你的BattleEngine()類當前沒有每個實例的狀態，例如。在任何方法中，您都不使用self，因爲實例上沒有任何內容可以將指定爲。