Krdytkyu

ello! I discovered the problem while trying to update my trezor bridge. When I launch the software center, it crashes immediately and I get this...

>2018-12-23 17:37:34,594 - softwarecenter.ui.gtk3.app - INFO - setting up proxy 'None'

2018-12-23 17:37:34,811 - softwarecenter.backend.reviews - WARNING - Could not get usefulness from server, no username in config file

2018-12-23 17:37:34,812 - softwarecenter.plugin - INFO - activating plugin '<module 'webapps_activation' from '/usr/share/software-center/softwarecenter/plugins/webapps_activation.pyc'>'

2018-12-23 17:37:34,844 - softwarecenter.db.pkginfo_impl.aptcache - INFO - aptcache.open()

Traceback (most recent call last):

  File "/usr/share/software-center/softwarecenter/db/pkginfo_impl/aptcache.py", line 261, in open

    self._cache = apt.Cache(progress)

  File "/usr/lib/python2.7/dist-packages/apt/cache.py", line 107, in __init__

    self.open(progress)

  File "/usr/lib/python2.7/dist-packages/apt/cache.py", line 152, in open

    self._depcache = apt_pkg.DepCache(self._cache)

SystemError: E:The package trezor-bridge needs to be reinstalled, but I can't find an archive for it.

2018-12-23 17:37:35,460 - softwarecenter.db.enquire - ERROR - _get_estimate_nr_apps_and_nr_pkgs failed

Traceback (most recent call last):

  File "/usr/share/software-center/softwarecenter/db/enquire.py", line 115, in _get_estimate_nr_apps_and_nr_pkgs

    tmp_matches = enquire.get_mset(0, len(self.db), None, xfilter)

  File "/usr/share/software-center/softwarecenter/db/appfilter.py", line 89, in __call__

    if (not pkgname in self.cache and

  File "/usr/share/software-center/softwarecenter/db/pkginfo_impl/aptcache.py", line 281, in __contains__

    return self._cache.__contains__(k)

AttributeError: 'NoneType' object has no attribute '__contains__'

Traceback (most recent call last):

  File "/usr/bin/software-center", line 183, in <module>

    app.run(args)

  File "/usr/share/software-center/softwarecenter/ui/gtk3/app.py", line 1378, in run

    self.show_available_packages(args)

  File "/usr/share/software-center/softwarecenter/ui/gtk3/app.py", line 1316, in show_available_packages

    self.view_manager.set_active_view(ViewPages.AVAILABLE)

  File "/usr/share/software-center/softwarecenter/ui/gtk3/session/viewmanager.py", line 150, in set_active_view

    view_widget.init_view()

  File "/usr/share/software-center/softwarecenter/ui/gtk3/panes/availablepane.py", line 227, in init_view

    self.cache, self.db, self.icons, self.apps_filter)

  File "/usr/share/software-center/softwarecenter/ui/gtk3/views/lobbyview.py", line 80, in __init__

    self.build()

  File "/usr/share/software-center/softwarecenter/ui/gtk3/views/lobbyview.py", line 326, in build

    self._build_homepage_view()

  File "/usr/share/software-center/softwarecenter/ui/gtk3/views/lobbyview.py", line 121, in _build_homepage_view

    self._append_whats_new()

  File "/usr/share/software-center/softwarecenter/ui/gtk3/views/lobbyview.py", line 255, in _append_whats_new

    whats_new_cat = self._update_whats_new_content()

  File "/usr/share/software-center/softwarecenter/ui/gtk3/views/lobbyview.py", line 240, in _update_whats_new_content

    docs = whats_new_cat.get_documents(self.db)

  File "/usr/share/software-center/softwarecenter/db/categories.py", line 131, in get_documents

    nonblocking_load=False)

  File "/usr/share/software-center/softwarecenter/db/enquire.py", line 330, in set_query

    self._blocking_perform_search()

  File "/usr/share/software-center/softwarecenter/db/enquire.py", line 225, in _blocking_perform_search

    matches = enquire.get_mset(0, self.limit, None, xfilter)

  File "/usr/share/software-center/softwarecenter/db/appfilter.py", line 89, in __call__

    if (not pkgname in self.cache and

  File "/usr/share/software-center/softwarecenter/db/pkginfo_impl/aptcache.py", line 281, in __contains__

    return self._cache.__contains__(k)

AttributeError: 'NoneType' object has no attribute '__contains__'

I read all the similar posts but haven't found a solution, and other people's errors seem different than mine. Tried uninstalling and re-installing the software center, and noting changed. Ran an update, and nothing changed. Any suggestions??

I would install synaptic package manager....... It will provide a GUI to trouble-shoot potential missing packages etc .....

Open the gnome terminal and type:

sudo apt-get update && sudo apt-get install synaptic -y

This could be a solution to your problem.