Software Center crashes at start

When I try to run software-center:

 ➜ ~ 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 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 object, SafeConfigParser

I tried to remove and install software-center, and the following happens:

 ➜ ~ sudo apt-get install software-center
Leyendo lista de paquetes... Hecho
Creando árbol de dependencias
Leyendo la información de estado... Hecho
Los paquetes indicados a continuación se instalaron de forma automática y ya no son necesarios.
  language-pack-kde-zh-hans language-pack-kde-zh-hans-base language-pack-zh-hans language-pack-zh-hans-base linux-headers-3.5.0-17 linux-headers-3.5.0-17-generic
Use «apt-get autoremove» para eliminarlos.
Se instalarán los siguientes paquetes NUEVOS:
  software-center
0 actualizados, 1 se instalarán, 0 para eliminar y 0 no actualizados.
Se necesita descargar 0 B/628 kB de archivos.
Se utilizarán 4.522 kB de espacio de disco adicional después de esta operación.
Seleccionando paquete software-center previamente no seleccionado
(Leyendo la base de datos ... 430342 ficheros o directorios instalados actualmente.)
Desempaquetando software-center (de .../software-center_5.4.1.4_all.deb) ...
Procesando disparadores para bamfdaemon ...
Rebuilding /usr/share/applications/bamf.index...
Procesando disparadores para desktop-file-utils ...
Procesando disparadores para gnome-menus ...
Procesando disparadores para hicolor-icon-theme ...
Procesando disparadores para man-db ...
Configurando software-center (5.4.1.4) ...
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 27, 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 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
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 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

How could I solve it. Any ideas?

Jose