python - Error when using classes and then calling on the class

Question

I made a class as you can see here.

    class Player():
        def __init__(self, name, maxhealth, base_attack, gold, weapon, curweapon, healing_potions):
            player = Player('player', 100, 100, 5, 30, 'Normal Sword', 'Normal Sword', 0 )
            self.name = name
            self.maxhealth = maxhealth
            self.health = self.maxhealth
            self.base_attack = base_attack
            self.gold = gold
            self.weap = weapon
            self.curweapon = curweapon
            self.healing_potions = healing_potions

But then when I try and call on the healing_potions part like so

                    if question == '2':
                        player_in_diningroom = True
                        print("You enter the dining room")
                        print("")
                        print("You find a Potion Of healing on the table!")
                        print("")
                        healing_potions += 1
                        player_in_diningroom = False

Then it gives me this error

Traceback (most recent call last): File "c:/Users/Isaiah/Desktop/All of my programs/Role playing game.py", line 179, in healing_potions += 1 NameError: name 'healing_potions' is not defined PS C:\Users\Isaiah\Desktop\All of my programs>

标签： python

Answer 1

我不太明白你为什么在你的播放器类中初始化一个播放器对象。这会导致无限递归，您会不断地无限地创建玩家实例。您很可能需要在课堂之外创建它。我在类中添加了一个方法，因此我们可以使用属于该实例的方法来增加健康药水。这通常是推荐的做法。

#player class
class Player():
    def __init__(self, name, maxhealth, base_attack, gold, weapon, curweapon, healing_potions):
        self.name = name
        self.maxhealth = maxhealth
        self.health = self.maxhealth
        self.base_attack = base_attack
        self.gold = gold
        self.weap = weapon
        self.curweapon = curweapon
        self.healing_potions = healing_potions
    def increase_health_potions(self):
        self.healing_potions +=1

然后我们初始化一个播放器实例/对象。我注意到您创建的实例中有一个额外的参数，所以我删除了一个以使其工作

#create an instance called player
player = Player('player', 100, 100, 5, 'Normal Sword', 'Normal Sword', 0 )

question = '2'
if question == '2':
    player_in_diningroom = True
    print("You enter the dining room")
    print("")
    print("You find a Potion Of healing on the table!")
    print("")
    player.healing_potions += 1 #accesing and increasing variable belonging to instance
    player.increase_health_potions() #call method belonging to instance that increases the variable 
    player_in_diningroom = False

print(player.healing_potions)

留意在

player.healing_potions += 1

您必须参考您想要增加健康药水的玩家。