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    Traceback (most recent call last):
  File "", line 1, in ?
  File "D:\newtest\raopan\..\raopan\alumni\models.py", line 5, in ?
    from django.db import models
  File "C:\Python24\lib\site-packages\django-
0.95-py2.4.egg\django\db\__init__.p
y", line 7, in ?
    if not settings.DATABASE_ENGINE:
  File "C:\Python24\lib\site-packages\django-
0.95-py2.4.egg\django\conf\__init__
.py", line 27, in __getattr__
    self._import_settings()
  File "C:\Python24\lib\site-packages\django-
0.95-py2.4.egg\django\conf\__init__
.py", line 52, in _import_settings
    raise EnvironmentError, "Environment variable %s is undefined." %
ENVIRONMEN
T_VARIABLE
EnvironmentError: Environment variable DJANGO_SETTINGS_MODULE is undefined.


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URL: http://python.cn/pipermail/python-chinese/attachments/20061009/3aba6798/attachment.html 

Python中模块之间不允许交叉导入。你出现这个问题说明你的设计有问题，应该把这两部分代码放入一个模块中。 --记得好像是引自刘鑫兄。

我在SQLObject中也遇到过同样的问题，最后我根本就是什么都没有导入，而直接使用，反正没有代码上的直接联系，所以也就通过了。