[ZODB-Dev] unable to import ZODB: class ConflictError, AttributeError

[Alexandre Garel]

Le 13/06/2012 18:57, Ralf Hauenschild a écrit :
> Hello guys,
>
> i've been desperately trying to install ZODB3 via the following ways:
> - easy_install ZODB3
> - installation of Zope2
> - manual installation of ZODB3, preceeded by installation of the 
> requested packages from pypi
>
> I'm using Ubuntu and Python 2.6.
>
> Whe trying to import ZODB, I'm still getting the following error:
>
>
> python
> Python 2.6.5 (r265:79063, Apr 16 2010, 13:57:41)
> [GCC 4.4.3] on linux2
> Type "help", "copyright", "credits" or "license" for more information.
> >>> import ZODB
> Traceback (most recent call last):
>   File "<stdin>", line 1, in <module>
>   File 
> "/usr/local/lib/python2.6/dist-packages/ZODB3-3.10.5-py2.6-linux-x86_64.egg/ZODB/__init__.py", 
> line 28, in <module>
>     from DB import DB, connection
>   File 
> "/usr/local/lib/python2.6/dist-packages/ZODB3-3.10.5-py2.6-linux-x86_64.egg/ZODB/DB.py", 
> line 28, in <module>
>     from ZODB.Connection import Connection
>   File 
> "/usr/local/lib/python2.6/dist-packages/ZODB3-3.10.5-py2.6-linux-x86_64.egg/ZODB/Connection.py", 
> line 33, in <module>
>     from ZODB.blob import Blob, rename_or_copy_blob, remove_committed_dir
>   File 
> "/usr/local/lib/python2.6/dist-packages/ZODB3-3.10.5-py2.6-linux-x86_64.egg/ZODB/blob.py", 
> line 35, in <module>
>     from ZODB.POSException import POSKeyError
>   File 
> "/usr/local/lib/python2.6/dist-packages/ZODB3-3.10.5-py2.6-linux-x86_64.egg/ZODB/POSException.py", 
> line 71, in <module>
>     class ConflictError(POSError, transaction.interfaces.TransientError):
> AttributeError: 'module' object has no attribute 'TransientError'
> >>>
>
>
> Can anybody help me, please?

The problem may be  with a system wide installed version of transaction.

I would say, try in a virtualenv with no site packages :

$ virtualenv -p /usr/bin/python2.6 --no-site-packages myproject
$ cd myproject
$ . bin/activate
$ pip install ZODB3

Hope this helps,

Alex