#!/usr/bin/python
import copy
import transaction
from persistent import Persistent
from ZODB.DB import DB
from ZODB.MappingStorage import MappingStorage

class SampleObject(Persistent):
    pass

db = DB(MappingStorage())
conn = db.open()
conn.root()['obj1'] = SampleObject()
transaction.commit()

# Use a different connection to sidestep the ZODB object cache
conn2 = db.open()
conn2.root()['obj2'] = copy.deepcopy(conn2.root()['obj1'])
transaction.commit()

conn3 = db.open()
obj1 = conn3.root()['obj1']
obj2 = conn3.root()['obj2']
transaction.commit()

if obj1 is obj2:
    print "Fail: instead of a copy we got the same object"
elif obj1._p_oid == obj2._p_oid:
    print "Fail: copy has the same oid"
else:
    print "Looks OK."


# Posted by Marius Gedminas to [ZODB-DEV] mail list, 2007/01/23