Re: using python: crash, when importing gtk

[Jean Brefort <jean brefort normalesup org>]

Le dimanche 06 mai 2012 à 15:06 +0200, scrutinizer gmx at a écrit :
> -------- Original-Nachricht --------
> > Datum: Sat, 05 May 2012 15:44:42 +0200
> > Von: Jean Brefort <jean brefort normalesup org>
> > An: scrutinizer gmx at
> > CC: gnumeric-list gnome org
> > Betreff: Re: using python: crash, when importing gtk
>
> > Le vendredi 04 mai 2012 à 07:32 +0200, scrutinizer gmx at a écrit :
> > > -------- Original-Nachricht --------
> > > > Datum: Wed, 02 May 2012 14:06:41 +0200
> > > > Von: "Jean Bréfort" <jean brefort normalesup org>
> > > > An: scrutinizer gmx at
> > > > CC: gnumeric-list gnome org
> > > > Betreff: Re: using python: crash, when importing gtk
> > >
> > > > 1.11.3 should NOT build with Python support. It should fail at
> > configure
> > > > stage.
> > > Hello Jean, I don't understand why.
> >
> > It should fail because things can't work currently. It does not fail
> > actually, and this is a bug.
> >
> > > > You are using pygtk which depends on gtk+-2.0 from a gtk+-3.0 program,
> > > > so the crash is anticipated.
> > >
> > > I tried using PyGI instead. A dialog appears, but then, after pressing
> > the ok button, gnumeric hangs.
> > > gnumeric
> > >
> > > /usr/lib/python2.7/dist-packages/gi/_gobject/constants.py:24: Warning:
> > g_boxed_type_register_static: assertion `g_type_from_name (name) == 0'
> > failed
> > >   from . import _gobject
> >
> > Hmm, this is clearly a bug. Something tries to initialize gobject type a
> > second time, and, of course, this fails. I'm suspecting this occurs
> > during gnm_python_init() execution. This code needs much love in order
> > to work. It currently imports pygtk wich is not compatible with gtk-3.
>
> I don't know, if it is related to that. Similar things happen in 1.10.17 with gtk2.
>
> I have two python pugins, each of them imports gtk. The first plugin works fine, but if I start the second 
> one (both plugins are "gui" plugins, then a traceback appears)
>
> import pygtk
>
> pygtk.require('2.0')
>
> import gtk
> import Gnumeric ...
>
> Traceback (most recent call last):
>   File "transpose", line 17, in <module>
>   File "/usr/lib/python2.7/dist-packages/gtk-2.0/gtk/__init__.py", line 42, in <module>
>     import gdk
> ImportError: No module named gdk
> E Execution of module "transpose" failed.
> ^[[A
> ** (gnumeric:2108): CRITICAL **: gplp_unload_service_function_group: assertion 
> `IS_GNM_PLUGIN_SERVICE_FUNCTION_GROUP (service)' failed
>
> If I start plugin A (starts ok), then plugin B will fail. If I restart Gnumeric, first start plugin B 
> (works ok), then launching plugin A will fail again with the traceback message above. 
>
> Do you know a fix or workaround for the buggy behaviour?

No, I'm facing similar behavior with the gtk3 version (calling a python
function, and then opening the python console does not work properly). I
am not a Python expert (actually, I don't know Python at all). This
makes things difficult to analyze and fix. Just the fact that this also
occurs with 1.10 makes me think I might not have introduced a new bug)

Regards,
Jean