Gnome 3.2 issue: 'NoneType' object has no attribute 'ICAL_STATUS_CONFIRMED'

[Juanma Hernández]

Arch Linux
evolution 3.2.0
python-evolution 2.32.0
gtg-bzr 1012

It seems that something in evolution has changed.

2011-10-04 10:17:41,333 - DEBUG - gtg:core_main_init:135 - Debug output enabled.
2011-10-04 10:17:41,375 - DEBUG - __init__:__init__:68 - Backends found: ['backend_rtm', 'backend_twitter', 'backend_launchpad', 'backend_localfile', 'backend_identica', 'backend_evolution', 'backend_gnote', 'backend_tomboy']
2011-10-04 10:17:41,442 - DEBUG - __init__:__init__:77 - Backend backend_twitter could not be loaded: No module named tweepy.models
2011-10-04 10:17:41,443 - DEBUG - __init__:__init__:77 - Backend backend_launchpad could not be loaded: No module named launchpadlib.launchpad
Traceback (most recent call last):
  File "/usr/bin/gtg", line 69, in <module>
    sys.exit(GTG.gtg.main(options, args))
  File "/usr/lib/python2.7/site-packages/GTG/gtg.py", line 114, in main
    ds, req = core_main_init(options, args)
  File "/usr/lib/python2.7/site-packages/GTG/gtg.py", line 141, in core_main_init
    backends_list = BackendFactory().get_saved_backends_list()
  File "/usr/lib/python2.7/site-packages/GTG/backends/__init__.py", line 73, in __init__
    __import__(extended_module_name)
  File "/usr/lib/python2.7/site-packages/GTG/backends/backend_evolution.py", line 43, in <module>
    {Task.STA_ACTIVE: evolution.ecal.ICAL_STATUS_CONFIRMED,
AttributeError: 'NoneType' object has no attribute 'ICAL_STATUS_CONFIRMED'

[Izidor Matušov (izidor)]

Hi Juanma,

this kind of bug is quite a strange for me. It seems to me, that you don't have evolution.ecal library.

My python-evolution is 2.32.0-0ubuntu2

Try please the following: run python console and insert those commands:

>>> import evolution
>>> print evolution.ecal
<module 'evolution.ecal' from '/usr/lib/pymodules/python2.7/gtk-2.0/evolution/ecal.so'>

I suppose, that the last line will be None.

[Juanma Hernández (juanmah-gmail)]

This is a bit weird. If I uninstall python-evolution, it works.

[Izidor Matušov (izidor)]

It works without python-evolution? It shouldn't... Don't you have installed mutliple version of evolution/python-evolution?

[Juanma Hernández (juanmah-gmail)]

Without python-evolution I get this extra line:

2011-10-05 05:58:36,708 - DEBUG - __init__:__init__:77 - Backend backend_evolution could not be loaded: No module named evolution

Likewise I haven't python-twitter nor python-launchpad installed.

2011-10-05 05:58:35,785 - DEBUG - __init__:__init__:77 - Backend backend_launchpad could not be loaded: No module named launchpadlib.launchpad
2011-10-05 05:58:35,895 - DEBUG - __init__:__init__:77 - Backend backend_twitter could not be loaded: No module named tweepy.models

[Izidor Matušov (izidor)]

Okay, I understand that. When you don't have python-evolution, the dependencies of a backend are not met and the backend is disabled. That is a requested behavior. I can see two sub-problems for this bug:

1) If backend has problem with its malformed code, GTG should start anyway and disable the backend.
2) Why python-evolution does not have ecal submodule? I'm going to install Archlinux and try it for myself...

[Juanma Hernández (juanmah-gmail)]

Both, with and without python bindings for evolution I get this:

>>> import evolution
>>> print evolution.ecal
None

library is in /usr/lib/python2.7/site-packages/gtk-2.0/evolution/ecal.so

Could be maybe a python-evolution package bug?. I checked changes from last release of package and I don't find anything able to cause this.

http://projects.archlinux.org/svntogit/packages.git/commit/trunk?h=packages/gnome-python-desktop&id=82de1538d8ad8462d26c877a1e9e4ad6b2f4f87a

[Juanma Hernández (juanmah-gmail)]

Sorry, without python bindings for evolution I get this:

>>> import evolution
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
ImportError: No module named evolution

[Izidor Matušov (izidor)]

Personally I can see that as a bug of package. What is the content of /usr/lib/python2.7/site-packages/gtk-2.0/evolution/__init__.py?

[Izidor Matušov (izidor)]

I've updated the code. Now if there is a buggy backend, GTG just ignore that backend. The point #1 solved in rev 1013.

The second point is much more interesting!

[Juanma Hernández (juanmah-gmail)]

The content of /usr/lib/python2.7/site-packages/gtk-2.0/evolution/__init__.py:

try:
    import ebook
except ImportError:
    ebook = None
    __version__ = None
else:
    __version__ = ebook.__version__

try:
    import ecal
except ImportError:
    ecal = None

[Izidor Matušov (izidor)]

There might be problem with importing ecal... Please, change

try:
    import ecal
except ImportError:
    ecal = None

into

import ecal

After that try to run python and issue commands
>>> import evolution
>>> print evolution.ecal

It should assert some kind of error. (I think, it might be a problem with package)

[Juanma Hernández (juanmah-gmail)]

You were right, it lacks a library:

>>> import ecal
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
ImportError: libecal-1.2.so.8: cannot open shared object file: No such file or directory

In Arch Linux, there's version 10 instead of 8: /usr/lib/libecal-1.2.so.10 is owned by evolution-data-server 3.2.0-2

Gnome 3.0 still used libecal-1.2.so.8, because it worked before.

There's no python-evolution 3.2 in Arch Linux yet, since latest gnome-python-desktop is 2.32.

I'll report a bug. Thanks

[Izidor Matušov (izidor)]

I'm glad the problem was found. Closing this bug.

[Juanma Hernández (juanmah-gmail)]

It seems that whole gnome-python-* is deprecated. Because of this, evolution backend won't work anymore in gnome >= 3.2.

[Juanma Hernández (juanmah-gmail)]

Recompiling python-evolution had revived the evolution backend.