importTerror:无法导入名称tz(psycopg2)

我使用的是Windows XP,使用的是Python运行时 http://www.python.org/ftp/python/2.7/python-2.7.msi

如果我在独立应用程序中运行, import psycopg2 不会给我带来任何麻烦。但是,当使用mod_wsgi+apache时,我将得到以下错误

[Thu Nov 18 14:26:51 2010] [error] [client 127.0.0.1] mod_wsgi (pid=2832): Target WSGI script 'C:/Projects/SandBox/web/script/index.py' cannot be loaded as Python module.
[Thu Nov 18 14:26:51 2010] [error] [client 127.0.0.1] mod_wsgi (pid=2832): Exception occurred processing WSGI script 'C:/Projects/SandBox/web/script/index.py'.
[Thu Nov 18 14:26:51 2010] [error] [client 127.0.0.1] Traceback (most recent call last):
[Thu Nov 18 14:26:51 2010] [error] [client 127.0.0.1]   File "C:/Projects/SandBox/web/script/index.py", line 9, in <module>
[Thu Nov 18 14:26:51 2010] [error] [client 127.0.0.1]     import psycopg2
[Thu Nov 18 14:26:51 2010] [error] [client 127.0.0.1]   File "build\\bdist.win32\\egg\\psycopg2\\__init__.py", line 65, in <module>
[Thu Nov 18 14:26:51 2010] [error] [client 127.0.0.1]     from psycopg2 import tz
[Thu Nov 18 14:26:51 2010] [error] [client 127.0.0.1] ImportError: cannot import name tz

这是python脚本。

import sys, os
sys.path.append(os.path.dirname(__file__))

import psycopg2

def application(environ, start_response):
    status = '200 OK'
    output = 'Hello World!'

    response_headers = [('Content-type', 'text/plain'),
                        ('Content-Length', str(len(output)))]
    start_response(status, response_headers)

    return [output]

这是httpd.conf文件。

LoadModule wsgi_module modules/mod_wsgi-win32-ap22py27-3.3.so
WSGIScriptAlias / "C:/Projects/SandBox/web/"
<Directory "C:/Projects/SandBox/web">
    AllowOverride None
    Options None
    Order deny,allow
    Allow from all
</Directory>

我查了一下档案 C:\Python27\Lib\site-packages\psycopg2-2.2.2-py2.7-win32.egg\ ,有 C:\Python27\Lib\site-packages\psycopg2-2.2.2-py2.7-win32.egg\psycopg2\tz.py