Python 类变量更改未保存

Question

我正在尝试进行文本冒险，以帮助在尝试学习 Python 的概念和细微差别的同时保持兴趣。我最初遵循 YouTube 教程(6 部分系列，第 1 部分提供的链接:https://www.youtube.com/watch?v=MFW8DJ6qsak)。

我创建了玩家类，如下所示:

class Player:
    def __init__(self):
        self.name = ''
        self.jobclass = ''
        self.currenthp = 0
        self.totalhp = 0
        self.currentmp = 0
        self.totalmp = 0
        self.physical_damage = 0
        self.physical_defense = 0
        self.magic_attack = 0
        self.magic_defense = 0
        self.speed = 0
        self.luck = 0
        self.status_effect = []
        self.location ='b2'
        self.game_over = False

myPlayer = Player()

我当前的问题是尝试根据玩家选择的角色工作为玩家分配某些统计数据，即:

def setup_game():
    ...
    player_jobclass = input("> ")
    myPlayer.jobclass = player_jobclass
    valid_jobs = ['warrior', 'mage', 'thief', 'cleric']
    while player_jobclass.lower() not in valid_jobs:
        print("Please choose a valid class")
        player_jobclass = input("> ")
    if player_jobclass.lower() in valid_jobs:
            myPlayer.jobclass = player_jobclass
            print("Ah, the " +player_jobclass.lower()+ ". Fine choice!\n")

    #Class Starting Stats
    if myPlayer.jobclass is 'warrior':
        self.currenthp = 20
        self.totalhp = 20
        self.currentmp = 10
        self.totalmp = 10
        self.physical_damage = 10
        self.physical_defense = 10
        self.magic_attack = 2
        self.magic_defense = 3
        self.speed = 4
        self.luck = 4
        self.location = 'd1'
    elif myPlayer.jobclass is 'mage':
        self.currenthp = 10
        self.totalhp = 10
        self.currentmp = 20
        self.totalmp = 20
        self.physical_damage = 2
        self.physical_defense = 3
        self.magic_attack = 10
        self.magic_defense = 7
        self.speed = 7
        self.luck = 3
        self.location = 'a1'
    ...
    main_game_loop()

因为在这一切运行之后，我可以很好地进入游戏，并且我的所有 Action 和小 Action 都可以正常工作，但是如果我尝试通过以下方式打印玩家“统计信息”:

def show_stats():
hpmpadarmPrint = ("" + str(myPlayer.currenthp) + "/" + str(myPlayer.totalhp) + " hp " + str(myPlayer.currentmp) + "/" + str(myPlayer.totalmp) + " mp " + str(myPlayer.physical_damage) + " ATK " + str(myPlayer.physical_defense) + " ARM \n")
mgclckspdPrint = ("" + str(myPlayer.magic_attack) + " AP " + str(myPlayer.magic_defense) + " MR " + str(myPlayer.speed) + " SPD " + str(myPlayer.luck) + " LCK \n")

打印的内容是:
0/0 hp 0/0 mp 0 ATK 0 ARM 0 AP 0 MR 0 SPD 0 LCK

我可以看出，就分配值而言，有一些更大的概念让我无法理解，因为即使 self.location = 'b2' 也必须存在，否则游戏将无法作为 myPlayer 运行实际上并没有被分配我认为应该分配的值。这也会阻止我的 change_text_speed() 函数工作，而且......你明白了。

猜测主要问题是:分配后如何保留新值？

Answer 1

self 和 myPlayer 是两个不同的对象。您可以进行两个修复。首先，在设置统计数据时将 self 替换为 myPlayer。

if myPlayer.jobclass is 'warrior':
    myPlayer.currenthp = 20
    myPlayer.totalhp = 20
    myPlayer.currentmp = 10
    ...

第二个也是我的选择，更好的方法是在 __init__ 中设置统计信息。它看起来像这样。

if self.jobclass is 'warrior':
    self.currenthp = 20
    self.totalhp = 20
    self.currentmp = 10
    ...

为了使代码变得更好，请阅读继承并为每个作业类创建一个类。毕竟你称其为工作类(Class)。