Plugins written in Python can no longer be enabled

I noticed that's due to the new version of python-gobject package. Funnily, that package also seems to break apport itself (at least in my computer).

There is a parallel conversation at https://bugzilla.redhat.com/show_bug.cgi?id=732855 that indicates the upstream pygobject3 and libpeas were updated on 2011-09-02

Just a side note, as I have gone to determine why the plugins won't activate, I discovered that running "python2.7 -c "from gi.repository import Gedit" fails, but running "python3 -c "from gi.repository import Gedit" doesn't. I am assuming it could be the way libpeas/gedit is linked to Python, and/or the version of the interpreter that it loads. I can also see that gedit depends on python 2.7.

When I try to activate the "Bracket Completion" plugin, gedit outputs this:
(gedit:25444): Gtk-CRITICAL **: gtk_accel_label_set_accel_closure: assertion `gtk_accel_group_from_accel_closure (accel_closure) != NULL' failed

(gedit:25444): libpeas-WARNING **: Error initializing Python interpreter: could not import gi

(gedit:25444): libpeas-WARNING **: Please check the installation of all the Python related packages required by libpeas and try again

(gedit:25444): libpeas-WARNING **: Cannot load Python plugin 'bracketcompletion' since libpeas was not able to initialize the Python interpreter

(gedit:25444): libpeas-WARNING **: Error loading plugin 'bracketcompletion'

This could mean that the python "gi" module is probably written for python 3, but not python 2.7.

Hope this helps.

This bug was fixed in the package libpeas - 1.1.3-0ubuntu1

---------------
libpeas (1.1.3-0ubuntu1) oneiric; urgency=low

  [ Martin Pitt ]
  * New upstream release:
    - Link against pygobject 3. (LP: #839712)
    - Do not cast pointers to unsigned integers.
  * Drop debian/patches/gint_is_not_gtype, upstream now.
  * debian/control.in: Bump python-gobject-dev build dependency to >= 2.90 as
    per upstream configure.ac.
  * debian/control.in: Move valac-0.12 to valac to use 0.14.

  [ Oliver Sauder ]
  * Added peas-gtk vapi file libpeas-gtk-1.0.vapi (LP: #825834)
 -- Martin Pitt <email address hidden> Mon, 05 Sep 2011 08:41:48 +0200

@Martin: I updated packages. Plugins written in Python now can be enabled, but a lot can not be used. For example, if I enable "Snippets" and then go to "Tools > Manage Snippets...", nothing happens and the following error is displayed on the terminal:

TypeError: on_action_snippets_activate() takes exactly 3 arguments (2 given)

I have this error for other plugins, for example:

- "External Tools": TypeError: <lambda>() takes exactly 2 arguments (1 given)
- "Advanced Find/Replace": TypeError: advanced_find_active() takes at least 3 arguments (2 given)

See also bug #818857

Right, these are now bugs in the actual plugins. gedit is at 3.1.4, gedit-plugins at 3.1.2, both need to be updated to current versions which will certainly fix a lot of these bugs.