Python 3：爲什麼我的類的函數運行兩次？

Question

我有一個包含這種攻擊功能類：

def attack(self, victim): 
    strike = 0 
    if victim.strength > self.strength: 
     strike = 40 
    else: 
     strike = 70 
    successChance = randint(1,100) 
    if successChance > strike: 
     self.lives -= 1 
     return False 
    else: 
     victim.lives -= 1 
     return True 

它只應該給每個用戶按下按鈕時運行一次，但它運行兩次也就是說每按下按鈕計爲兩個。我知道錯誤發生在我的類函數中，因爲錯誤發生在類的測試運行期間。

調用函數的類中唯一的代碼是我的測試函數，它只能在內部運行。然而問題仍然存在於我的GUI代碼中。

這是我的類函數：

class Player(object): 

def __init__(self, name="", lives=DEFAULT_LIVES): 
    self._name = name 
    self.lives = lives 
    self.strength = randint(1,10) 
    if self._name== "Test": 
     self.lives = 1000 
    if self._name== "": 
     self._name = "John Smith" 
def __str__(self): 
    return (self._name + " Life: " + str(self.lives) + " Strength: " + str(self.strength)) 

def getLives(self): 
    return self.lives 

def getStrength(self): 
    self.strength = randint(1,10) 
    return self.strength 

def getName(self): 
    return self._name 

def isAlive(self): 
    if self.lives <= 0: 
     return False 
    return True 

def attack(self, victim): 
    if victim.strength > self.strength: 
     strike = 40 
    else: 
     strike = 70 
    successChance = randint(1,100) 
    if successChance > strike: 
     print(successChance) 
     self.lives -= 1 
     return False 
    else: 
     print(successChance) 
     victim.lives -= 1 
     return True 


def test(): 
    player = Player("Tyler") 
    opponent = Player(choice(opponentList)) 
    while player.isAlive() == True and opponent.isAlive() == True: 
     print(player) 
     print(opponent) 
     player.attack(opponent) 
     player.isAlive() 
     opponent.isAlive() 
     if not player.attack(opponent): 
      print("You lost") 
     else: 
      print("You won") 
    print("Game Over") 

if __name__ == '__main__': 
    test() 

Answer 1

那麼，如果看起來像你實際上是在測試（）調用該函數兩次：

#your old code: 
while player.isAlive() == True and opponent.isAlive() == True: 
    print(player) 
    print(opponent) 
    player.attack(opponent) #called once here 
    player.isAlive() 
    opponent.isAlive() 
    if not player.attack(opponent):#called 2nd time here 
     print("You lost") 
    else: 
     print("You won") 
print("Game Over") 

我想嘗試這個：

while player.isAlive() and opponent.isAlive(): 
    print(player) 
    print(opponent) 
    player_attack_was_successful = player.attack(opponent) 
    #player.isAlive() #(does this line even do anything?) 
    #opponent.isAlive() 
    if player_attack_was_successful: 
     print("You won") 
    else: 
     print("You lost") 
print("Game Over")