Setting up python3 (3.5.1-1) ...
running python rtupdate hooks for python3.5...
dpkg-query: package 'rhythmbox-plugins' is not installed
Use dpkg --info (= dpkg-deb --info) to examine archive files,
and dpkg --contents (= dpkg-deb --contents) to list their contents.
Traceback (most recent call last):
File "/usr/bin/py3clean", line 210, in <module>
main()
File "/usr/bin/py3clean", line 196, in main
pfiles = set(dpf.from_package(options.package))
File "/usr/share/python3/debpython/files.py", line 53, in from_package
raise Exception("cannot get content of %s" % package_name)
Exception: cannot get content of rhythmbox-plugins
error running python rtupdate hook rhythmbox-plugins
dpkg: error processing package python3 (--configure):
subprocess installed post-installation script returned error exit status 4
dpkg: dependency problems prevent configuration of python3-apt:
python3-apt depends on python3 (<< 3.6); however:
Package python3 is not configured yet.
python3-apt depends on python3 (>= 3.4~); however:
Package python3 is not configured yet.

dpkg: error processing package python3-apt (--configure):
dependency problems - leaving unconfigured
dpkg: dependency problems prevent configuration of debtags:
debtags depends on python3; however:
Package python3 is not configured yet.
debtags depends on python3:any (>= 3.2~); however:
Package python3 is not configured yet.
debtags depends on python3-apt; however:
Package python3-apt is not configured yet.