Marius Gedminas wrote at 2008-1-23 23:19 +0200: >On Mon, Jan 21, 2008 at 07:15:42PM +0100, Dieter Maurer wrote: >> Marius Gedminas wrote at 2008-1-21 00:08 +0200: >> >Personally, I'd be afraid to use deepcopy on a persistent object. >> >> A deepcopy is likely to be no copy at all. >> >> As Python's "deepcopy" does not know about object ids, it is likely >> that the copy result uses the same oids as the original. >> When you store this copy, objects with the same oid are identified. > >This appears not to be the case. The following script prints "Looks OK":
You are right -- and I do now understand why. "deepcopy" uses "__getstate__" to get at the object's state. "Persistent.__getstate__" does not include the special persistent attributes. Most of the "_p_" and all "_v_" attributes are not included. -- Dieter _______________________________________________ For more information about ZODB, see the ZODB Wiki: http://www.zope.org/Wikis/ZODB/ ZODB-Dev mailing list - ZODB-Dev@zope.org http://mail.zope.org/mailman/listinfo/zodb-dev
