[ZODB-Dev] open/close pb

[Vincent Rioux]

Hello,
sorry for a probably very naive question,
I am facing some problems with ZODB3-3.3a2.win32-py2.3.exe

First (not a problem really) I always get this message:
-------------------------------------------------------------
  There are two possibilities:

  1. You don't care about ExtensionClass. You are importing
     Persistence because that's what you imported in the past.
     In this case, you should really use the persistent package
     instead:

        >>> from persistent import Persistent
        >>> from persistent.list import PersistentList
        >>> from persistent.mapping import PersistentMapping

  2. You want your classes to be ExtensionClasses. In this case,
     you need to install the ExtensionClass package
     separately. ExtensionClass is no-longer included with ZODB3.


warn("""Couldn't import the ExtensionClass-based base class

-------------------------------------------------------------
even, If I explicitely changed my code to only import:
from ZODB.FileStorage import FileStorage
from ZODB import DB
from persistent import Persistent

----------------------------------------------------

Secondly, I find myself in trouble when I :
- open a database file
- close it
- open an other database file
- try to save it => i get
"No handlers could be found for logger "txn.3244"
and I get a ValueError.

Finally the only workaround I found is to quit/reopen my program each time 
I want to change of database file

may be I am not precise enough...
but any help would be greatly appreciated
cordially,
vincent