Arch Linux

jjalocha

Member

Registered: 2011-06-11

Posts: 12

[SOLVED] Python + GDBM backwards incompatibility on upgrade

Since the last Python and GNU DMB upgrade (both happened at the same time) I can't access my old GDBM databases through Python. Since I am unable to discover the cause of the problem, I am posting here, maybe someone can point me to the right direction.

With the old versions of Python and GDBM (python-3.2.2-1, gdbm-1.8.3-9) I can create a file (and read it):

>>> import dbm.gnu
>>> db = dbm.gnu.open('oldpy-olddb.db', 'c')
>>> db['key'] = 'value'
>>> db.close()

With the new versions of Python and GDBM (python-3.2.2-2, gdbm-1.10-1) I can create a file and then read it. But I can't read the old file:

>>> import dbm.gnu
>>> db = dbm.gnu.open('oldpy-olddb.db')
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
_gdbm.error: [Errno 22] Invalid argument

When I try to upgrade just the GDBM version (gdbm-1.10-1) and keep the old Python version (python-3.2.2-1), I can't import GDBM:

>>> import dbm.gnu
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/usr/lib/python3.2/dbm/gnu.py", line 3, in <module>
    from _gdbm import *
ImportError: libgdbm.so.3: cannot open shared object file: No such file or directory

When I try to upgrade only Python (python-3.2.2-2) and keep the old GDMB version (gdbm-1.8.3-9), I can't impor GDBM either:

>>> import dbm.gnu
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/usr/lib/python3.2/dbm/gnu.py", line 3, in <module>
    from _gdbm import *
ImportError: libgdbm.so.4: cannot open shared object file: No such file or directory

Does anyone understand if this problem is caused somewhere in Arch, or where I should file a bug report or ask for help?

Thanks!
-Jerzy

Last edited by jjalocha (2011-12-02 13:42:46)

jjalocha

Member

Registered: 2011-06-11

Posts: 12

Re: [SOLVED] Python + GDBM backwards incompatibility on upgrade

I just discovered that the new GDBM version ships with some command-line utilities that were not available in the old version. 'testgdbm' shows me that the new version apparently can't deal with the old file format.