Bug 1047618

If memory serves, this was because libwnck3 was not installed. Can you confirm that it is installed on your system?

[root@prannondesk /root]# rpm -qa | grep libwnck3
libwnck3-3.4.5-1.fc19.x86_64
libwnck3-devel-3.4.5-1.fc19.i686
libwnck3-3.4.5-1.fc19.i686
libwnck3-devel-3.4.5-1.fc19.x86_64

[root@prannondesk /root]# rpm -qa | grep libwnck
libwnck-2.30.7-5.fc19.x86_64
libwnck-devel-2.30.7-5.fc19.x86_64
gnome-python2-libwnck-2.32.0-14.fc19.x86_64
libwnck3-3.4.5-1.fc19.x86_64
libwnck3-devel-3.4.5-1.fc19.i686
libwnck-devel-2.30.7-5.fc19.i686
libwnck3-3.4.5-1.fc19.i686
libwnck3-devel-3.4.5-1.fc19.x86_64
libwnck-2.30.7-5.fc19.i686

It does appear to be installed, including the development libraries and other packages for libwnck.

Please try this directly:

$ python
Python 2.7.5 (default, Nov 12 2013, 16:45:54) 
[GCC 4.8.2 20131017 (Red Hat 4.8.2-1)] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> from gi.repository import GLib, Gtk, Pango, WebKit

It should succeed, but I suspect that on your XFCE system, it will fail with 

gi.RepositoryError: Requiring namespace 'Gtk' version '2.0', but '3.0' is already loaded

Fail it did indeed! Please let me know if there is any additional information that I can provide that can help.

=======================================================

[root@prannondesk /root]# python
Python 2.7.5 (default, Nov 12 2013, 16:18:42) 
[GCC 4.8.2 20131017 (Red Hat 4.8.2-1)] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> from gi.repository import GLib, Gtk, Pango, WebKit
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/usr/lib64/python2.7/site-packages/gi/importer.py", line 68, in load_module
    dynamic_module._load()
  File "/usr/lib64/python2.7/site-packages/gi/module.py", line 289, in _load
    self._introspection_module = get_introspection_module(self._namespace)
  File "/usr/lib64/python2.7/site-packages/gi/module.py", line 268, in get_introspection_module
    module = IntrospectionModule(namespace, version)
  File "/usr/lib64/python2.7/site-packages/gi/module.py", line 117, in __init__
    repository.require(namespace, version)
gi.RepositoryError: Requiring namespace 'Gtk' version '2.0', but '3.0' is already loaded
>>>

Okay, so now you need to try:

from gi.repository import GLib
from gi.repository import Gtk
from gi.repository import Pango
from gi.repository import WebKit

I'm guessing that it will fail on the WebKit import. 

If it does, see which of these packages are installed:

rpm -q webkitgtk libwebkit2gtk webkitgtk3

I'm guessing that you have webkitgtk and not webkitgtk3. If so, that's the bug, and I'll fix gwibber to be more strict about that dependency. (You can immediately work around it by doing: yum install webkitgtk3)

[root@prannondesk /root]# python
Python 2.7.5 (default, Nov 12 2013, 16:18:42) 
[GCC 4.8.2 20131017 (Red Hat 4.8.2-1)] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> from gi.repository import GLib
>>> from gi.repository import Gtk
>>> from gi.repository import Pango
>>> from gi.repository import WebKit
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/usr/lib64/python2.7/site-packages/gi/importer.py", line 68, in load_module
    dynamic_module._load()
  File "/usr/lib64/python2.7/site-packages/gi/module.py", line 289, in _load
    self._introspection_module = get_introspection_module(self._namespace)
  File "/usr/lib64/python2.7/site-packages/gi/module.py", line 268, in get_introspection_module
    module = IntrospectionModule(namespace, version)
  File "/usr/lib64/python2.7/site-packages/gi/module.py", line 117, in __init__
    repository.require(namespace, version)
gi.RepositoryError: Requiring namespace 'Gtk' version '2.0', but '3.0' is already loaded
>>> 
[root@prannondesk /root]# rpm -q webkitgtk libewebkit2gtk webkitgtk3
webkitgtk-2.0.4-1.fc19.x86_64
package libewebkit2gtk is not installed
package webkitgtk3 is not installed

=================================================

After installing webkitgtk3, gwibber started to work more normally. However, I now have a new problem that is preventing me from adding and authorizing accounts, so I will be starting a new bug report here >> https://bugzilla.redhat.com/show_bug.cgi?id=1048349

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