我的 Django 应用程序突然开始崩溃，我不明白为什么。我什至不能让它现在运行。我正在运行修订版 11798。
当我使用单机服务器测试我的应用程序时，它突然开始不导入csrf。我以前让它工作得很好。我试图通过使用 shell 查看发生了什么，结果如下：
$ ./manage.py shell
Python 2.6.3 (r263:75184, Oct 2 2009, 07:56:03)
[GCC 4.0.1 (Apple Inc. build 5493)] on darwin
>>> import django
>>> from django import middleware
>>> from django.middleware import csrf
Traceback (most recent call last):
File "<console>", line 1, in <module>
ImportError: cannot import name csrf
>>>
我检查了文件系统以查看文件是否存在并且它是（并且完好无损）。我非常困惑。谁能帮我吗？
Django错误如下：
File "/Library/Frameworks/Python.framework/Versions/2.6/lib/python2.6/site-packages/Django-1.1.1-py2.6.egg/django/core/servers/basehttp.py", line 279, in run
self.result = application(self.environ, self.start_response)
File "/Library/Frameworks/Python.framework/Versions/2.6/lib/python2.6/site-packages/Django-1.1.1-py2.6.egg/django/core/servers/basehttp.py", line 651, in __call__
return self.application(environ, start_response)
File "/Library/Frameworks/Python.framework/Versions/2.6/lib/python2.6/site-packages/Django-1.1.1-py2.6.egg/django/core/handlers/wsgi.py", line 230, in __call__
self.load_middleware()
File "/Library/Frameworks/Python.framework/Versions/2.6/lib/python2.6/site-packages/Django-1.1.1-py2.6.egg/django/core/handlers/base.py", line 42, in load_middleware
raise exceptions.ImproperlyConfigured, 'Error importing middleware %s: "%s"' % (mw_module, e)
ImproperlyConfigured: Error importing middleware django.middleware.csrf: "No module named csrf"