trac 错误,应该和python有关

这应该是个和python安装有关的问题,没用过,也不知道怎么配置,搜索了一下也没找到合适的答案。
问题是这样出现的,刚开始用的是trac-0.9.6出现找不到  modules的错误,于是试着换成00.10.3的,结果trac就不能启动了,我觉的这应该是python的配置问题吧

#tracd --help

Traceback (most recent call last):
  File "/usr/bin/tracd", line 19, in ?
    from trac.web.standalone import main
  File "/usr/lib/python2.4/site-packages/trac/web/__init__.py", line 1, in ?
    from trac.web.api import *
  File "/usr/lib/python2.4/site-packages/trac/web/api.py", line 22, in ?
    from trac.core import Interface
  File "/usr/lib/python2.4/site-packages/trac/core.py", line 19, in ?
    from trac.util import TracError
  File "/usr/lib/python2.4/site-packages/trac/util/__init__.py", line 30, in ?
    from trac.core import TracError
ImportError: cannot import name TracError