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From: Tuomas Vesterinen on 16 May 2010 05:07
I am testing an application GUI with Python 2.4, 2.5 and 2.6. The native
Python (in Fedora 12) is 2.6. Versions 2.4 and 2.5 are alt-installed.

Aplication GUI uses:
import pygtk
pygtk.require('2.0')
import gtk
import gobject

I go to:
$ cd /usr/local/lib/python2.4/site-packages

and say:
$ sudo ln -s /usr/lib/python2.6/site-packages/pygtk.py pygtk.py
$ sudo ln -s /usr/lib/python2.6/site-packages/gtk-2.0 gtk-2.0

and try:
$ python2.4 gui_utils.py
Traceback (most recent call last):
File "gui_utils.py", line 57, in ?
import gtk
File
"/usr/local/lib/python2.4/site-packages/gtk-2.0/gtk/__init__.py", line
30, in ?
import gobject as _gobject
File
"/usr/local/lib/python2.4/site-packages/gtk-2.0/gobject/__init__.py",
line 26, in ?
from glib import spawn_async, idle_add, timeout_add,
timeout_add_seconds, \
File
"/usr/local/lib/python2.4/site-packages/gtk-2.0/glib/__init__.py", line
22, in ?
from glib._glib import *
ImportError: /usr/lib/libpyglib-2.0-python.so.0: undefined symbol:
_PyObject_CallFunction_SizeT

What I should say more to get access to the GTK?

Tuomas Vesterinen
From: Alister on 16 May 2010 07:38
On Sun, 16 May 2010 12:07:08 +0300, Tuomas Vesterinen wrote:

> I am testing an application GUI with Python 2.4, 2.5 and 2.6. The native
> Python (in Fedora 12) is 2.6. Versions 2.4 and 2.5 are alt-installed.
>
> Aplication GUI uses:
> import pygtk
> pygtk.require('2.0')
> import gtk
> import gobject
>
> I go to:
> $ cd /usr/local/lib/python2.4/site-packages
>
> and say:
> $ sudo ln -s /usr/lib/python2.6/site-packages/pygtk.py pygtk.py $ sudo
> ln -s /usr/lib/python2.6/site-packages/gtk-2.0 gtk-2.0
>
> and try:
> $ python2.4 gui_utils.py
> Traceback (most recent call last):
> File "gui_utils.py", line 57, in ?
> import gtk
> File
> "/usr/local/lib/python2.4/site-packages/gtk-2.0/gtk/__init__.py", line
> 30, in ?
> import gobject as _gobject
> File
> "/usr/local/lib/python2.4/site-packages/gtk-2.0/gobject/__init__.py",
> line 26, in ?
> from glib import spawn_async, idle_add, timeout_add,
> timeout_add_seconds, \
> File
> "/usr/local/lib/python2.4/site-packages/gtk-2.0/glib/__init__.py", line
> 22, in ?
> from glib._glib import *
> ImportError: /usr/lib/libpyglib-2.0-python.so.0: undefined symbol:
> _PyObject_CallFunction_SizeT
>
> What I should say more to get access to the GTK?
>
> Tuomas Vesterinen

I am not a great expert on this But I think you need to use the Redhat
alternatives system to switch between versions rather than trying to
change things manually.

as i understand it the Alternatives system sets up and changes various
symlinks to ensure everything works correctly.



--
"When the going gets tough, the tough get empirical."
-- Jon Carroll
From: Tuomas Vesterinen on 16 May 2010 14:29
On 05/16/2010 02:38 PM, Alister wrote:
> On Sun, 16 May 2010 12:07:08 +0300, Tuomas Vesterinen wrote:
>
>> I am testing an application GUI with Python 2.4, 2.5 and 2.6. The native
>> Python (in Fedora 12) is 2.6. Versions 2.4 and 2.5 are alt-installed.
>>
>> Aplication GUI uses:
>> import pygtk
>> pygtk.require('2.0')
>> import gtk
>> import gobject
>>
>> I go to:
>> $ cd /usr/local/lib/python2.4/site-packages
>>
>> and say:
>> $ sudo ln -s /usr/lib/python2.6/site-packages/pygtk.py pygtk.py $ sudo
>> ln -s /usr/lib/python2.6/site-packages/gtk-2.0 gtk-2.0
>>
>> and try:
>> $ python2.4 gui_utils.py
>> Traceback (most recent call last):
>> File "gui_utils.py", line 57, in ?
>> import gtk
>> File
>> "/usr/local/lib/python2.4/site-packages/gtk-2.0/gtk/__init__.py", line
>> 30, in ?
>> import gobject as _gobject
>> File
>> "/usr/local/lib/python2.4/site-packages/gtk-2.0/gobject/__init__.py",
>> line 26, in ?
>> from glib import spawn_async, idle_add, timeout_add,
>> timeout_add_seconds, \
>> File
>> "/usr/local/lib/python2.4/site-packages/gtk-2.0/glib/__init__.py", line
>> 22, in ?
>> from glib._glib import *
>> ImportError: /usr/lib/libpyglib-2.0-python.so.0: undefined symbol:
>> _PyObject_CallFunction_SizeT
>>
>> What I should say more to get access to the GTK?
>>
>> Tuomas Vesterinen
>
> I am not a great expert on this But I think you need to use the Redhat
> alternatives system to switch between versions rather than trying to
> change things manually.
>
> as i understand it the Alternatives system sets up and changes various
> symlinks to ensure everything works correctly.
>

Yes, my first trial is not the solution because byte compiled .pyc files
must be produced by the corresponding Python version.

PEP 3147 http://www.python.org/dev/peps/pep-3147 suggests a common
solution, but only for Python 3.2 and perhaps 2.7. So I am still looking
for hints. Have You some helpful links to those "Alternatives system"?

Tuomas Vesterinen
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