Traceback (most recent call last):
  File "/usr/bin/software-center", line 131, in <module>
    from softwarecenter.ui.gtk3.app import SoftwareCenterAppGtk3
  File "/usr/share/software-center/softwarecenter/ui/gtk3/app.py", line 82, in <module>
    from softwarecenter.ui.gtk3.panes.installedpane import InstalledPane
  File "/usr/share/software-center/softwarecenter/ui/gtk3/panes/installedpane.py", line 36, in <module>
    from softwarecenter.ui.gtk3.models.appstore2 import (
  File "/usr/share/software-center/softwarecenter/ui/gtk3/models/appstore2.py", line 33, in <module>
    from softwarecenter.backend.reviews import get_review_loader
  File "/usr/share/software-center/softwarecenter/backend/reviews/__init__.py", line 32, in <module>
    from bsddb import db as bdb
  File "/usr/lib/python2.7/bsddb/__init__.py", line 67, in <module>
    import _bsddb
ImportError: No module named _bsddb