我使用下面的教程在Ubuntu 14.0.4上安装了postgresql的osqa作为后端
http://wiki.osqa.net/display/docs/ubuntu+12.04,+django+1.3,+mod_wsgi,+virtual_env,+postgresql
要求创build一个虚拟环境。 我做了同样的，得到500服务器错误。 因此，我在settings_local.py中设置了debug = True，并在显示mod_wsgi错误的apache错误日志文件中出现以下错误。
[Mon Nov 24 11:26:33.823663 2014] [:error] [pid 6389:tid 3034110784] [remote 192.168.227.129:15031] mod_wsgi (pid=6389): Exception occurred processing WSGI script '/srv/osqa.1/osqa/osqa.wsgi'. [Mon Nov 24 11:26:33.823844 2014] [:error] [pid 6389:tid 3034110784] [remote 192.168.227.129:15031] Traceback (most recent call last): [Mon Nov 24 11:26:33.823882 2014] [:error] [pid 6389:tid 3034110784] [remote 192.168.227.129:15031] File "/srv/osqa.1/lib/python2.7/site-packages/Django-1.3-py2.7.egg/django/core/handlers/wsgi.py", line 250, in __call__ [Mon Nov 24 11:26:33.824027 2014] [:error] [pid 6389:tid 3034110784] [remote 192.168.227.129:15031] self.load_middleware() [Mon Nov 24 11:26:33.824059 2014] [:error] [pid 6389:tid 3034110784] [remote 192.168.227.129:15031] File "/srv/osqa.1/lib/python2.7/site-packages/Django-1.3-py2.7.egg/django/core/handlers/base.py", line 47, in load_middleware [Mon Nov 24 11:26:33.824184 2014] [:error] [pid 6389:tid 3034110784] [remote 192.168.227.129:15031] raise exceptions.ImproperlyConfigured('Error importing middleware %s: "%s"' % (mw_module, e)) [Mon Nov 24 11:26:33.824216 2014] [:error] [pid 6389:tid 3034110784] [remote 192.168.227.129:15031] ImproperlyConfigured: Error importing middleware forum.middleware.extended_user: "cannot import name six" 我有六个安装的和所有其他的依赖项安装。 我通过activate.py文件打印sys.path虚拟环境中的所有path都按预期方式打印，并提及六个path。 可能是什么原因？ 谁能帮我吗？？