使用msn协议运行twisted.words示例时出现问题

Question

我目前正在尝试使用Twisted库，特别是twisted words来尝试与MSN进行交互。但是，当我运行twisted提供的示例脚本时，我得到了一个错误。具体来说，这个错误可以在http://i42.tinypic.com/wl945w.jpg中找到。脚本可以在这里找到http://twistedmatrix.com/projects/words/documentation/examples/msn_example.py。

平台是带有Python 2.6的Vista

编辑:完整输出：

Email (passport): mypassport@hotmail.com
Password: ******
2009-04-25 10:52:49-0300 [-] Log opened.
2009-04-25 10:52:49-0300 [-] Starting factory <twisted.internet.protocol.ClientFactory instance at 0x9d87e8c>
2009-04-25 10:52:55-0300 [Dispatch,client] Starting factory <twisted.words.protocols.msn.NotificationFactory instance at 0x9e28bcc>
2009-04-25 10:52:55-0300 [Dispatch,client] Stopping factory <twisted.internet.protocol.ClientFactory instance at 0x9d87e8c>
2009-04-25 10:52:55-0300 [Notification,client] Unhandled Error
    Traceback (most recent call last):
      File "/usr/local/lib/python2.5/site-packages/twisted/python/log.py", line 84, in callWithLogger
        return callWithContext({"system": lp}, func, *args, **kw)
      File "/usr/local/lib/python2.5/site-packages/twisted/python/log.py", line 69, in callWithContext
        return context.call({ILogContext: newCtx}, func, *args, **kw)
      File "/usr/local/lib/python2.5/site-packages/twisted/python/context.py", line 59, in callWithContext
        return self.currentContext().callWithContext(ctx, func, *args, **kw)
      File "/usr/local/lib/python2.5/site-packages/twisted/python/context.py", line 37, in callWithContext
        return func(*args,**kw)
    --- <exception caught here> ---
      File "/usr/local/lib/python2.5/site-packages/twisted/internet/selectreactor.py", line 146, in _doReadOrWrite
        why = getattr(selectable, method)()
      File "/usr/local/lib/python2.5/site-packages/twisted/internet/tcp.py", line 460, in doRead
        return self.protocol.dataReceived(data)
      File "/usr/local/lib/python2.5/site-packages/twisted/protocols/basic.py", line 238, in dataReceived
        why = self.lineReceived(line)
      File "/usr/local/lib/python2.5/site-packages/twisted/words/protocols/msn.py", line 651, in lineReceived
        handler(params.split())
      File "/usr/local/lib/python2.5/site-packages/twisted/words/protocols/msn.py", line 827, in handle_USR
        d = _login(f.userHandle, f.password, f.passportServer, authData=params[3])
      File "/usr/local/lib/python2.5/site-packages/twisted/words/protocols/msn.py", line 182, in _login
        reactor.connectSSL(_parsePrimitiveHost(nexusServer)[0], 443, fac, ClientContextFactory())
    exceptions.TypeError: 'NoneType' object is not callable

2009-04-25 10:52:55-0300 [Notification,client] Stopping factory <twisted.words.protocols.msn.NotificationFactory instance at 0x9e28bcc>

Answer 1

由于MSN涉及SSL连接，因此您必须安装pyOpenSSL才能使用它。看起来你可能并不需要。然而，对于Twisted来说，这并不是一个很好的方式来报告这个缺失的依赖项。我建议在Twisted问题跟踪器中提交一个工单，以改进此报告。

Answer 2

怎么了

看看这个：

>>> a = str
>>> a() # it's ok, a string is a callable class
''
>>> a = None
>>> a() # it fails, None a special Singleton not meant to be called

Traceback (most recent call last):
  File "<pyshell#4>", line 1, in <module>
    a()
TypeError: 'NoneType' object is not callable

你能做什么

显然，最后一行(refactor.connectSSL...)包含三个对象调用，其中一个对象为None。

如果你对调试器不感兴趣，你可以做的第一件事就是，取一行中的每个元素，并在它之前添加：

assert object1 is None 
assert object2 is None

您可能需要检查文档，看看在哪种情况下，某些初始化它的方法会返回None。

愿原力。