Lamson（Python SMTP 服务器）错误

Question

我在我的WebFaction共享主机上通过easy_install安装了Lamson。然后我去做“30秒入门”（可以查看http://lamsonproject.org/docs/getting_started.html），但是在执行完：

[almacmillan@web129 python2.6]$ lamson gen -project mymailserver

之后，我得到了：

    Traceback (most recent call last):
  File "/home/almacmillan/bin/lamson", line 5, in <module>
    pkg_resources.run_script('lamson==1.0', 'lamson')
  File "/usr/local/lib/python2.6/site-packages/pkg_resources.py", line 448, in run_script
    self.require(requires)[0].run_script(script_name, ns)
  File "/usr/local/lib/python2.6/site-packages/pkg_resources.py", line 1166, in run_script
    execfile(script_filename, namespace, namespace)
  File "/home/almacmillan/lib/python2.6/lamson-1.0-py2.6.egg/EGG-INFO/scripts/lamson", line 3, in <module>
    from lamson import args, commands
  File "/home/almacmillan/lib/python2.6/lamson-1.0-py2.6.egg/lamson/commands.py", line 28, in <module>
    from lamson import server, args, utils, mail, routing, queue, encoding
  File "/home/almacmillan/lib/python2.6/lamson-1.0-py2.6.egg/lamson/utils.py", line 12, in <module>
    from daemon import pidlockfile
  File "/home/almacmillan/lib/python2.6/python_daemon-1.5.5-py2.6.egg/daemon/pidlockfile.py", line 33, in <module>
    class PIDLockFile(LinkFileLock, object):
TypeError: Error when calling the metaclass bases
    function() argument 1 must be code, not str

我还是个新手程序员，非常希望能得到一些调试方面的帮助。

Answer 1

这个问题已经有记录了，可以在这里查看：http://support.lamsonproject.org/tktview?name=06d488141d

使用http://pypi.python.org/pypi/lockfile/0.8，因为0.9.1版本的API改动导致了python_daemon-1.5.5-py2.5.egg/daemon/pidlockfile.py出现问题。0.9.1版本是通过easy_install安装的。所以，这个问题和lamson没有关系。

解决方法是：从你的Python库中删除lockfile 0.9.1版本，然后从“奶酪商店”获取0.8版本。