Python类属性未设置？

Question

我在写一个支持插件扩展的聊天机器人时遇到了一个奇怪的问题。这个基础扩展类有一些预先定义的属性和方法，这些属性和方法可以被继承、重写和设置。下面是基础类的代码：

class Ext:
    # Info about the extension
    Name    = 'Unnamed'
    Author  = 'Nobody'
    Version = 0
    Desc    = 'This extension has no description'
    Webpage = ''

    # Determines whether the extension will automatically be on when added or not
    OnByDefault = False

    def __init__(self): 
        # Overwrite me! You can use me to load files and set attributes at startup
        raise Exception('AbstractClassError: This class must be overloaded')

    def SetName(self, name):
        name = name.split(' ')
        name = ''.join(name)
        self.Name = name

    def Load(self, file): 
        # Loads a file
        return Misc.read_obj(file)

    def Save(self, file, obj): 
        # Saves a file
        return Misc.write_obj(file, obj)

    def Activate(self, Komodo):
        # When the extension is turned on, this is called
        pass

    def add_cmd(self, Komodo, name, callback, default=False, link=''):
        # Add a command to the bot
        if name in Komodo.Ext.commands:
            Komodo.logger(msg = ">> Command '{0}' was already defined, so {1}'s version of the command couldn't be added".format(
                name, self.meta.name))
        else:
            Komodo.Ext.commands[name] = callback
            if default:
                Komodo.Ext.default_commands.append(name)
            if len(link) > 0:
                Komodo.Ext.links[name] = link

    def add_event(self, Komodo, type, callback):
        # Add an event to the bot
        if type not in Komodo.Ext.trigs:
            Komodo.logger(msg = 
                ">> Could not add '{0}' to event type '{1}' from extension '{2}' because that type does not exist".format(
                str(callback), type, self.name))
        else:
            Komodo.Ext.trigs[type].append(callback)

这就是一个扩展通常的样子：

class Extension(Ext):
    def __init__(self, K):  
        self.file = 'Storage/Extensions/AI.txt'
        self.SetName('AI')

        self.Version = 1.1
        self.Author  = 'blazer-flamewing'
        self.Desc    = 'An extension that lets you talk to an Artificial Intelligence program online called Kato.'
        self.Webpage = 'http://botdom.com/wiki/Komodo/Extensions/AI'

        try:    self.AI = self.Load(file)
        except: self.AI = {}

    def Activate(self, K):
        print(self.Version)
        self.add_cmd(K, 'ai', self.cmd_AI, False, 'http://botdom.com/wiki/Komodo/Extensions/AI')
        self.add_event(K, 'msg', self.msg_AI)


    ...more methods down here that aren't part of the base class

像这样写的每个扩展都能正常工作……除了一个，就是上面提到的那个。这个扩展只在设置它的名称属性时成功，而当读取其他属性时，它们仍然是基础类设置的值。在启动时，我遍历了每个扩展，打印了字典条目、实际名称、版本、作者，以及扩展是否开启，结果是这样的：

Responses Responses 1.2 blazer-flamewing OFF
Ai AI 0 Nobody ON
Notes Notes 1.2 blazer-flamewing OFF
Misc Misc 1.5 blazer-flamewing OFF
System System 2.2 blazer-flamewing ON
Helloworld HelloWorld 1.3 blazer-flamewing OFF
Goodbyes Goodbyes 0 blazer-flamewing OFF
Spamfilter Spamfilter 1.2 blazer-flamewing OFF
Damn dAmn 2.2 blazer-flamewing ON
Bds BDS 0.2 blazer-flamewing OFF
Fun Fun 1.6 blazer-flamewing OFF
Welcomes Welcomes 1.5 blazer-flamewing OFF
Cursefilter Cursefilter 1.7 blazer-flamewing OFF

同样，当AI开启时，Extension.Activate() 也没有正常工作。我猜这可能和同样的问题有关（没有正确设置）

有没有人知道为什么这个类的属性没有被设置？我卡在这个问题上好几个小时了，而这个扩展的设置方式和其他扩展完全一样

编辑：这里有另一个扩展供比较。这个扩展实际上是可以工作的，Activate() 也能正常调用。除了内容，其他方面几乎完全相同

from komodo.extension import Ext
import time

class Extension(Ext):        
    def __init__(self, K):
        self.SetName('dAmn')
        self.Version = 2.2
        self.Author  = 'blazer-flamewing'
        self.Desc    = 'Module for all standard dAmn commands such as join, part, and say.'
        self.Webpage = 'http://botdom.com/wiki/Komodo/Extensions/dAmn'
        self.OnByDefault = True

    def Activate(self, K):
        self.add_cmd(K, 'action',       self.cmd_action,       False, "http://botdom.com/wiki/Komodo/Extensions/dAmn#Me_or_Action")
        self.add_cmd(K, 'ban',          self.cmd_ban,          False, "http://botdom.com/wiki/Komodo/Extensions/dAmn#Ban_and_Unban")
        self.add_cmd(K, 'chat',         self.cmd_chat,         True,  "http://botdom.com/wiki/Komodo/Extensions/dAmn#Chat")
        self.add_cmd(K, 'demote',       self.cmd_demote,       False, "http://botdom.com/wiki/Komodo/Extensions/dAmn#Demote_and_Promote")
        self.add_cmd(K, 'join',         self.cmd_join,         False, "http://botdom.com/wiki/Komodo/Extensions/dAmn#Join_and_Part")
        ...etc

继承方法重写调试类属性属性设置聊天机器人插件扩展扩展激活

Python类属性未设置？

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