Guido van Rossum <[EMAIL PROTECTED]> added the comment: I think the ability to read old files is essential. The ability to write them is a mer nice-to-have.
On Fri, Nov 21, 2008 at 7:36 AM, <[EMAIL PROTECTED]> wrote: > > me> ... I thought Guido was of the opinion that the 3.0 version should > me> be able to read dumb dbms written by earlier Python versions.... > > And write them. From msg72963: > > (1) Be able to read databases written by Python 2.x. > > (1a) Write databases readable by Python 2.x. > > Ah, but wait a minute. I see your comment in msg76080: > > If you look at the 2.7 code all it requires of keys and values in > __setitem__ is that they are strings; there is nothing about Latin-1 in > terms of specific encoding (must be a 3.0 addition to make the > str/unicode transition the easiest). > > The acid test. I executed the attached mydb2write.py using Python 2.5 then > executed the attached mydb3read.py using Python 3.0. The output: > > % python2.5 mydb2write.py > 1 abc > 2 [4, {4.2999999999999998: 12}] > 3 <__main__.C instance at 0x34bb70> > % python3.0 mydb3read.py > 1 b'abc' > 2 [4, {4.2999999999999998: 12}] > Traceback (most recent call last): > File "mydb3read.py", line 13, in <module> > print(3, pickle.loads(db['3'])) > File "/Users/skip/local/lib/python3.0/pickle.py", line 1329, in loads > return Unpickler(file, encoding=encoding, errors=errors).load() > _pickle.UnpicklingError: bad pickle data > > so if the ability to read Python 2.x dumbdbm files is still a requirement I > think there's a little more work to do. > > cc'ing [EMAIL PROTECTED] to preserve the scripts with the ticket. > > Skip > > > _______________________________________________ > Python-3000-checkins mailing list > [EMAIL PROTECTED] > http://mail.python.org/mailman/listinfo/python-3000-checkins > > ---------- title: Byte/string inconsistencies between different dbm modules -> Re: r67310 - in python/branches/py3k: Lib/dbm/dumb.py Lib/test/test_dbm_dumb.py Misc/NEWS _______________________________________ Python tracker <[EMAIL PROTECTED]> <http://bugs.python.org/issue3799> _______________________________________ _______________________________________________ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com