Центр программного обеспечения Ubuntu отказывает из-за ошибки в его коде Python

Я искал это, но не нашел ссылки на нее на этом сайте. Если Вы знаете некоторых, отошлите меня к нему - проблемы, которые я видел, имеют различные признаки. Так, к точке...

У меня было Ubuntu 12.04 LTS в течение долгого времени, переключенный на Gnome Ubuntu Shell и т.д. Недавно я хотел переместиться в Ubuntu 13.04 и нашел проблему, которая по-видимому произошла ранее, но на на вид случайном уровне. Теперь я не могу запустить Центр программного обеспечения Ubuntu вообще.

Когда я выполняю консоль, я вижу:

$ software-center

(process:22270): Gtk-WARNING **: Locale not supported by C library.
    Using the fallback 'C' locale.
Traceback (most recent call last):
  File "/usr/bin/software-center", line 36, in <module>
    from softwarecenter.utils import (
  File "/usr/share/software-center/softwarecenter/utils.py", line 47, in <module>
    from config import get_config
  File "/usr/share/software-center/softwarecenter/config.py", line 33, in <module>
    class SoftwareCenterConfig(object, SafeConfigParser):
  File "/usr/lib/python2.7/abc.py", line 87, in __new__
    cls = super(ABCMeta, mcls).__new__(mcls, name, bases, namespace)
TypeError: Error when calling the metaclass bases
    Cannot create a consistent method resolution
order (MRO) for bases SafeConfigParser, object

Я надеялся, что следование за этими идеями (источник) могло быть полезным:

$ sudo apt-get purge software-center
$ sudo apt-get update
$ sudo apt-get dist-upgrade
$ sudo apt-get install software-center
$ sudo dpkg-reconfigure software-center --force

Как бы не так:

$ sudo apt-get purge software-center
Reading package lists... Done
Building dependency tree       
Reading state information... Done
The following package was automatically installed and is no longer required:
  software-center-aptdaemon-plugins
Use 'apt-get autoremove' to remove it.
The following packages will be REMOVED:
  software-center*
0 upgraded, 0 newly installed, 1 to remove and 0 not upgraded.
After this operation, 0 B of additional disk space will be used.
Do you want to continue [Y/n]? Y
perl: warning: Setting locale failed.
perl: warning: Please check that your locale settings:
    LANGUAGE = (unset),
    LC_ALL = (unset),
    LANG = "en_US.UTF-8"
    are supported and installed on your system.
perl: warning: Falling back to the standard locale ("C").
locale: Cannot set LC_CTYPE to default locale: No such file or directory
locale: Cannot set LC_MESSAGES to default locale: No such file or directory
locale: Cannot set LC_ALL to default locale: No such file or directory
(Reading database ... 269627 files and directories currently installed.)
Removing software-center ...
Purging configuration files for software-center ...
rmdir: failed to remove `/var/cache/software-center/xapian/': No such file or directory
dpkg: error processing software-center (--purge):
 subprocess installed post-removal script returned error exit status 1
Errors were encountered while processing:
 software-center
E: Sub-process /usr/bin/dpkg returned an error code (1)

Что я делаю неправильно? Как я могу избавиться от Центра программного обеспечения Ubuntu, вызывающего ошибку, и установить версию, которая не будет иметь этого?

Или возможно проблема с моим интерпретатором Python?

$ python --version
Python 2.7.3

Я полагаю, что Ubuntu постепенно перемещается в инструменты, работающие над Python 3.x только, но это - причина?

Спасибо за все подсказки. Я сильно полагаю, что это может быть также полезно для других.

Обновление 1.:

Первое обновление пошло от 12,04 до 12,10, и я не заметил, что оно не достигло 13.04. Как только я заметил, я обновил от 12,10 до 13,04. Проблема однако не исчезла.

Я также сделал что thefourtheye, который спрашивают:

$ sudo locale-gen
Generating locales...
  en_US.UTF-8... up-to-date
Generation complete.

И это - результат попытки сделать чистку:

$ sudo apt-get purge software-center
Reading package lists... Done
Building dependency tree       
Reading state information... Done
The following packages were automatically installed and are no longer required:
  python-oneconf software-center-aptdaemon-plugins
Use 'apt-get autoremove' to remove them.
The following packages will be REMOVED:
  software-center*
0 upgraded, 0 newly installed, 1 to remove and 0 not upgraded.
After this operation, 0 B of additional disk space will be used.
Do you want to continue [Y/n]? Y
(Reading database ... 279036 files and directories currently installed.)
Removing software-center ...
Purging configuration files for software-center ...
rmdir: failed to remove ‘/var/cache/software-center/xapian/’: No such file or directory
dpkg: error processing software-center (--purge):
 subprocess installed post-removal script returned error exit status 1
No apport report written because MaxReports is reached already
                                                              Errors were encountered while processing:
 software-center
E: Sub-process /usr/bin/dpkg returned an error code (1)

Обновление 2.:

Другая отладочная информация (требуемый nickguletskii):

$ cat /etc/environment
PATH="/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/usr/local/games"

и

$ sudo apt-get install language-pack-en
Reading package lists... Done
Building dependency tree       
Reading state information... Done
The following extra packages will be installed:
  firefox-locale-en language-pack-en-base
The following NEW packages will be installed:
  firefox-locale-en language-pack-en language-pack-en-base
0 upgraded, 3 newly installed, 0 to remove and 0 not upgraded.
Need to get 1,372 kB of archives.
After this operation, 4,874 kB of additional disk space will be used.
Do you want to continue [Y/n]? 
Get:1 http://security.ubuntu.com/ubuntu/ raring-security/main firefox-locale-en amd64 21.0+build2-0ubuntu0.13.04.2 [549 kB]
Get:2 http://archive.ubuntu.com/ubuntu/ raring/main language-pack-en-base all 1:13.04+20130418 [822 kB]
Get:3 http://archive.ubuntu.com/ubuntu/ raring/main language-pack-en all 1:13.04+20130418 [1,968 B]
Fetched 1,372 kB in 2s (521 kB/s)            
Selecting previously unselected package language-pack-en-base.
(Reading database ... 279503 files and directories currently installed.)
Unpacking language-pack-en-base (from .../language-pack-en-base_1%3a13.04+20130418_all.deb) ...
Selecting previously unselected package language-pack-en.
Unpacking language-pack-en (from .../language-pack-en_1%3a13.04+20130418_all.deb) ...
Selecting previously unselected package firefox-locale-en.
Unpacking firefox-locale-en (from .../firefox-locale-en_21.0+build2-0ubuntu0.13.04.2_amd64.deb) ...
Processing triggers for software-center ...
ERROR:root:DebFileApplication import
Traceback (most recent call last):
  File "/usr/share/software-center/softwarecenter/db/__init__.py", line 4, in <module>
    from debfile import DebFileApplication, DebFileOpenError
  File "/usr/share/software-center/softwarecenter/db/debfile.py", line 25, in <module>
    from softwarecenter.db.application import Application, AppDetails
  File "/usr/share/software-center/softwarecenter/db/application.py", line 28, in <module>
    import softwarecenter.distro
  File "/usr/share/software-center/softwarecenter/distro/__init__.py", line 26, in <module>
    from softwarecenter.utils import UnimplementedError, utf8
  File "/usr/share/software-center/softwarecenter/utils.py", line 48, in <module>
    from config import get_config
  File "/usr/share/software-center/softwarecenter/config.py", line 33, in <module>
    class SoftwareCenterConfig(object, SafeConfigParser):
  File "/usr/lib/python2.7/abc.py", line 87, in __new__
    cls = super(ABCMeta, mcls).__new__(mcls, name, bases, namespace)
TypeError: Error when calling the metaclass bases
    Cannot create a consistent method resolution
order (MRO) for bases object, SafeConfigParser
Traceback (most recent call last):
  File "/usr/sbin/update-software-center", line 38, in <module>
    from softwarecenter.db.update import rebuild_database
  File "/usr/share/software-center/softwarecenter/db/update.py", line 33, in <module>
    from softwarecenter.backend.scagent import SoftwareCenterAgent
  File "/usr/share/software-center/softwarecenter/backend/scagent.py", line 28, in <module>
    from softwarecenter.distro import get_distro, get_current_arch
  File "/usr/share/software-center/softwarecenter/distro/__init__.py", line 26, in <module>
    from softwarecenter.utils import UnimplementedError, utf8
  File "/usr/share/software-center/softwarecenter/utils.py", line 48, in <module>
    from config import get_config
  File "/usr/share/software-center/softwarecenter/config.py", line 33, in <module>
    class SoftwareCenterConfig(object, SafeConfigParser):
  File "/usr/lib/python2.7/abc.py", line 87, in __new__
    cls = super(ABCMeta, mcls).__new__(mcls, name, bases, namespace)
TypeError: Error when calling the metaclass bases
    Cannot create a consistent method resolution
order (MRO) for bases object, SafeConfigParser
Setting up firefox-locale-en (21.0+build2-0ubuntu0.13.04.2) ...
Setting up language-pack-en (1:13.04+20130418) ...
Setting up language-pack-en-base (1:13.04+20130418) ...
Generating locales...
  en_AG.UTF-8... done
  en_AU.UTF-8... done
  en_BW.UTF-8... done
  en_CA.UTF-8... done
  en_DK.UTF-8... done
  en_GB.UTF-8... done
  en_HK.UTF-8... done
  en_IE.UTF-8... done
  en_IN.UTF-8... done
  en_NG.UTF-8... done
  en_NZ.UTF-8... done
  en_PH.UTF-8... done
  en_SG.UTF-8... done
  en_US.UTF-8... up-to-date
  en_ZA.UTF-8... done
  en_ZM.UTF-8... done
  en_ZW.UTF-8... done
Generation complete.
Processing triggers for bamfdaemon ...
Rebuilding /usr/share/applications/bamf-2.index...

Обновление 3.:

После следования совету nickguletskii я получаю это:

$ cat /etc/environment 
PATH="/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/usr/local/games"
LC_NUMERIC="en_US.UTF-8"
LC_TIME="en_US.UTF-8"
LC_MONETARY="en_US.UTF-8"
LC_PAPER="en_US.UTF-8"
LC_IDENTIFICATION="en_US.UTF-8"
LC_NAME="en_US.UTF-8"
LC_ADDRESS="en_US.UTF-8"
LC_TELEPHONE="en_US.UTF-8"
LC_MEASUREMENT="en_US.UTF-8"
LANGUAGE="en_US:en_US:en"
LANG="en_US.UTF-8"

$ software-center
Traceback (most recent call last):
  File "/usr/bin/software-center", line 36, in <module>
    from softwarecenter.utils import (
  File "/usr/share/software-center/softwarecenter/utils.py", line 48, in <module>
    from config import get_config
  File "/usr/share/software-center/softwarecenter/config.py", line 33, in <module>
    class SoftwareCenterConfig(object, SafeConfigParser):
  File "/usr/lib/python2.7/abc.py", line 87, in __new__
    cls = super(ABCMeta, mcls).__new__(mcls, name, bases, namespace)
TypeError: Error when calling the metaclass bases
    Cannot create a consistent method resolution
order (MRO) for bases object, SafeConfigParser

$ sudo apt-get purge software-center
Reading package lists... Done
Building dependency tree       
Reading state information... Done
The following packages will be REMOVED:
  software-center*
0 upgraded, 0 newly installed, 1 to remove and 0 not upgraded.
After this operation, 3,588 kB disk space will be freed.
Do you want to continue [Y/n]? Y
(Reading database ... 280103 files and directories currently installed.)
Removing software-center ...
Purging configuration files for software-center ...
rmdir: failed to remove ‘/var/cache/software-center/xapian/’: No such file or directory
dpkg: error processing software-center (--purge):
 subprocess installed post-removal script returned error exit status 1
Processing triggers for bamfdaemon ...
Rebuilding /usr/share/applications/bamf-2.index...
Processing triggers for desktop-file-utils ...
Processing triggers for gnome-menus ...
Processing triggers for hicolor-icon-theme ...
Processing triggers for man-db ...
Errors were encountered while processing:
 software-center
E: Sub-process /usr/bin/dpkg returned an error code (1)

$ sudo apt-get install software-center
Reading package lists... Done
Building dependency tree       
Reading state information... Done
The following NEW packages will be installed:
  software-center
0 upgraded, 1 newly installed, 0 to remove and 0 not upgraded.
Need to get 0 B/442 kB of archives.
After this operation, 3,588 kB of additional disk space will be used.
Selecting previously unselected package software-center.
(Reading database ... 279639 files and directories currently installed.)
Unpacking software-center (from .../software-center_5.6.0-0ubuntu3_all.deb) ...
Processing triggers for man-db ...
Processing triggers for hicolor-icon-theme ...
Processing triggers for bamfdaemon ...
Rebuilding /usr/share/applications/bamf-2.index...
Processing triggers for desktop-file-utils ...
Processing triggers for gnome-menus ...
Setting up software-center (5.6.0-0ubuntu3) ...
ERROR:root:DebFileApplication import
Traceback (most recent call last):
  File "/usr/share/software-center/softwarecenter/db/__init__.py", line 4, in <module>
    from debfile import DebFileApplication, DebFileOpenError
  File "/usr/share/software-center/softwarecenter/db/debfile.py", line 25, in <module>
    from softwarecenter.db.application import Application, AppDetails
  File "/usr/share/software-center/softwarecenter/db/application.py", line 28, in <module>
    import softwarecenter.distro
  File "/usr/share/software-center/softwarecenter/distro/__init__.py", line 26, in <module>
    from softwarecenter.utils import UnimplementedError, utf8
  File "/usr/share/software-center/softwarecenter/utils.py", line 48, in <module>
    from config import get_config
  File "/usr/share/software-center/softwarecenter/config.py", line 33, in <module>
    class SoftwareCenterConfig(object, SafeConfigParser):
  File "/usr/lib/python2.7/abc.py", line 87, in __new__
    cls = super(ABCMeta, mcls).__new__(mcls, name, bases, namespace)
TypeError: Error when calling the metaclass bases
    Cannot create a consistent method resolution
order (MRO) for bases object, SafeConfigParser
Traceback (most recent call last):
  File "/usr/sbin/update-software-center", line 38, in <module>
    from softwarecenter.db.update import rebuild_database
  File "/usr/share/software-center/softwarecenter/db/update.py", line 33, in <module>
    from softwarecenter.backend.scagent import SoftwareCenterAgent
  File "/usr/share/software-center/softwarecenter/backend/scagent.py", line 28, in <module>
    from softwarecenter.distro import get_distro, get_current_arch
  File "/usr/share/software-center/softwarecenter/distro/__init__.py", line 26, in <module>
    from softwarecenter.utils import UnimplementedError, utf8
  File "/usr/share/software-center/softwarecenter/utils.py", line 48, in <module>
    from config import get_config
  File "/usr/share/software-center/softwarecenter/config.py", line 33, in <module>
    class SoftwareCenterConfig(object, SafeConfigParser):
  File "/usr/lib/python2.7/abc.py", line 87, in __new__
    cls = super(ABCMeta, mcls).__new__(mcls, name, bases, namespace)
TypeError: Error when calling the metaclass bases
    Cannot create a consistent method resolution
order (MRO) for bases object, SafeConfigParser

$ software-center
Traceback (most recent call last):
  File "/usr/bin/software-center", line 36, in <module>
    from softwarecenter.utils import (
  File "/usr/share/software-center/softwarecenter/utils.py", line 48, in <module>
    from config import get_config
  File "/usr/share/software-center/softwarecenter/config.py", line 33, in <module>
    class SoftwareCenterConfig(object, SafeConfigParser):
  File "/usr/lib/python2.7/abc.py", line 87, in __new__
    cls = super(ABCMeta, mcls).__new__(mcls, name, bases, namespace)
TypeError: Error when calling the metaclass bases
    Cannot create a consistent method resolution
order (MRO) for bases object, SafeConfigParser

На вид связанные с локалью ошибки ушли, но я все еще не могу выполнить Центр программного обеспечения Ubuntu, даже после попытки переустановить его.

Обновление 4.:

После переустановки некоторого материала Python и исправления порядка базовых классов для SoftwareCenterConfig, Я получаю это:

$ software-center
2013-06-09 14:24:06,002 - softwarecenter.ui.gtk3.app - INFO - setting up proxy 'None'
2013-06-09 14:24:06,283 - softwarecenter.fixme - WARNING - logs to the root logger: '('/usr/lib/python2.7/dist-packages/dbus/proxies.py', 410, '_introspect_error_handler')'
2013-06-09 14:24:06,283 - dbus.proxies - ERROR - Introspect error on com.ubuntu.sso:/com/ubuntu/sso/credentials: dbus.exceptions.DBusException: org.freedesktop.DBus.Error.Spawn.ChildExited: Process /usr/lib/ubuntu-sso-client/ubuntu-sso-login exited with status 1
Traceback (most recent call last):
  File "/usr/bin/software-center", line 130, in <module>
    app = SoftwareCenterAppGtk3(options, args)
  File "/usr/share/software-center/softwarecenter/ui/gtk3/app.py", line 338, in __init__
    self.icons)
  File "/usr/share/software-center/softwarecenter/ui/gtk3/session/appmanager.py", line 66, in __init__
    self.oauth_token = helper.find_oauth_token_sync()
  File "/usr/share/software-center/softwarecenter/backend/ubuntusso.py", line 141, in find_oauth_token_sync
    sso.find_credentials()
  File "/usr/share/software-center/softwarecenter/backend/login_impl/login_sso.py", line 75, in find_credentials
    self.proxy.find_credentials(self.appname, self._get_params())
  File "/usr/lib/python2.7/dist-packages/dbus/proxies.py", line 70, in __call__
    return self._proxy_method(*args, **keywords)
  File "/usr/lib/python2.7/dist-packages/dbus/proxies.py", line 145, in __call__
    **keywords)
  File "/usr/lib/python2.7/dist-packages/dbus/connection.py", line 651, in call_blocking
    message, timeout)
dbus.exceptions.DBusException: org.freedesktop.DBus.Error.Spawn.ChildExited: Process /usr/lib/ubuntu-sso-client/ubuntu-sso-login exited with status 1