raise ImproperlyConfigured,exc_info [1],exc_info [2]

我创建了一个django(1.6.1)项目并使用mongodb.当我运行python manage.py runserver 0.0.0.0:8000启动服务器时,它给我以下错误

  File "D:\Python34\lib\importlib\__init__.py", line 129, in import_module
    return _bootstrap._gcd_import(name[level:], package, level)
  File "", line 2186, in _gcd_import
  File "", line 2169, in _find_and_load
  File "", line 2158, in _find_and_load_unlocked
  File "", line 1209, in _load_unlocked
  File "", line 1133, in _exec
  File "", line 1432, in exec_module
  File "", line 1537, in get_code
  File "", line 1497, in source_to_code
  File "", line 321, in _call_with_frames_removed
  File "D:\Python34\lib\site-packages\django_mongodb_engine\base.py", line 234
    raise ImproperlyConfigured, exc_info[1], exc_info[2]
                              ^
SyntaxError: invalid syntax

这个错误是什么意思？