I attempted to upgrade to Ubuntu 17.04 zesty.  That seems to have
failed.  Now, when I do `sudo aptitude full-upgrade`, I get the
following error messages:

# =====================================================================
The following packages will be upgraded:
  python3
The following partially installed packages will be configured:
  gedit python3-minimal python3-uno python3.5 python3.5-minimal
  rhythmbox-plugin-magnatune rhythmbox-plugins ubuntu-gnome-desktop
1 packages upgraded, 0 newly installed, 0 to remove and 0 not upgraded.
Need to get 0 B/8,696 B of archives. After unpacking 0 B will be used.
Do you want to continue? [Y/n/?]
Setting up python3.5-minimal (3.5.3-1) ...
Traceback (most recent call last):
  File "/usr/lib/python3.5/py_compile.py", line 6, in <module>
    import importlib._bootstrap_external
  File "/usr/lib/python3.5/importlib/__init__.py", line 57, in <module>
    import types
  File "/usr/lib/python3.5/types.py", line 166, in <module>
    import functools as _functools
  File "/usr/lib/python3.5/functools.py", line 23, in <module>
    from weakref import WeakKeyDictionary
  File "/usr/lib/python3.5/weakref.py", line 12, in <module>
    from _weakref import (
ImportError: cannot import name '_remove_dead_weakref'
dpkg: error processing package python3.5-minimal (--configure):
 subprocess installed post-installation script returned error exit status 1
dpkg: dependency problems prevent configuration of python3-minimal:
 python3-minimal depends on python3.5-minimal (>= 3.5.3-1~); however:
  Package python3.5-minimal is not configured yet.

dpkg: error processing package python3-minimal (--configure):
 dependency problems - leaving unconfigured
No apport report written because the error message indicates its a followup 
error from a previous failure.
                Errors were encountered while processing:
 python3.5-minimal
 python3-minimal
E: Sub-process /usr/bin/dpkg returned an error code (1)
Setting up python3.5-minimal (3.5.3-1) ...
Traceback (most recent call last):
  File "/usr/lib/python3.5/py_compile.py", line 6, in <module>
    import importlib._bootstrap_external
  File "/usr/lib/python3.5/importlib/__init__.py", line 57, in <module>
    import types
  File "/usr/lib/python3.5/types.py", line 166, in <module>
    import functools as _functools
  File "/usr/lib/python3.5/functools.py", line 23, in <module>
    from weakref import WeakKeyDictionary
  File "/usr/lib/python3.5/weakref.py", line 12, in <module>
    from _weakref import (
ImportError: cannot import name '_remove_dead_weakref'
dpkg: error processing package python3.5-minimal (--configure):
 subprocess installed post-installation script returned error exit status 1
dpkg: dependency problems prevent configuration of python3-minimal:
 python3-minimal depends on python3.5-minimal (>= 3.5.3-1~); however:
  Package python3.5-minimal is not configured yet.

dpkg: error processing package python3-minimal (--configure):
 dependency problems - leaving unconfigured
dpkg: dependency problems prevent configuration of python3.5:
 python3.5 depends on python3.5-minimal (= 3.5.3-1); however:
  Package python3.5-minimal is not configured yet.

dpkg: error processing package python3.5 (--configure):
 dependency problems - leaving unconfigured
dpkg: dependency problems prevent configuration of rhythmbox-plugins:
 rhythmbox-plugins depends on python3.5; however:
  Package python3.5 is not configured yet.

dpkg: error processing package rhythmbox-plugins (--configure):
 dependency problems - leaving unconfigured
dpkg: dependency problems prevent configuration of rhythmbox-plugin-magnatune:
 rhythmbox-plugin-magnatune depends on rhythmbox-plugins; however:
  Package rhythmbox-plugins is not configured yet.

dpkg: error processing package rhythmbox-plugin-magnatune (--configure):
 dependency problems - leaving unconfigured
dpkg: dependency problems prevent configuration of python3-uno:
 python3-uno depends on python3.5; however:
  Package python3.5 is not configured yet.

dpkg: error processing package python3-uno (--configure):
 dependency problems - leaving unconfigured
dpkg: dependency problems prevent configuration of gedit:
 gedit depends on python3.5; however:
  Package python3.5 is not configured yet.

dpkg: error processing package gedit (--configure):
 dependency problems - leaving unconfigured
dpkg: dependency problems prevent configuration of ubuntu-gnome-desktop:
 ubuntu-gnome-desktop depends on gedit; however:
  Package gedit is not configured yet.

dpkg: error processing package ubuntu-gnome-desktop (--configure):
 dependency problems - leaving unconfigured
Errors were encountered while processing:
 python3.5-minimal
 python3-minimal
 python3.5
 rhythmbox-plugins
 rhythmbox-plugin-magnatune
 python3-uno
 gedit
 ubuntu-gnome-desktop
# =====================================================================

-- 
You received this bug notification because you are a member of Ubuntu
Touch seeded packages, which is subscribed to python3-defaults in
Ubuntu.
https://bugs.launchpad.net/bugs/1682934

Title:
  package python3 3.5.1-4 failed to install/upgrade: pre-dependency
  problem - not installing python3

Status in python3-defaults package in Ubuntu:
  Confirmed

Bug description:
  Got this error while using "Transmageddon Video Transcoder" and again
  while updating 16.10 to 17.04.

  Seems to have something to do with needing that Python3 version for
  Teletext decoding in media that is in transport stream format (.ts).

  ProblemType: Package
  DistroRelease: Ubuntu 17.04
  Package: python3 3.5.1-4
  ProcVersionSignature: Ubuntu 4.10.0-19.21-generic 4.10.8
  Uname: Linux 4.10.0-19-generic x86_64
  ApportVersion: 2.20.4-0ubuntu4
  Architecture: amd64
  Date: Fri Apr 14 19:27:33 2017
  ErrorMessage: pre-dependency problem - not installing python3
  InstallationDate: Installed on 2015-05-01 (714 days ago)
  InstallationMedia: Ubuntu 15.04 "Vivid Vervet" - Release amd64 (20150422)
  RelatedPackageVersions:
   dpkg 1.18.10ubuntu2
   apt  1.4
  SourcePackage: python3-defaults
  Title: package python3 3.5.1-4 failed to install/upgrade: pre-dependency 
problem - not installing python3
  UpgradeStatus: Upgraded to zesty on 2017-04-14 (0 days ago)

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/python3-defaults/+bug/1682934/+subscriptions

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