root@ubuntu:/var/log# sudo dpkg --purge gedit:amd64
(Reading database ... 162149 files and directories currently installed.)
Removing gedit:amd64 ...
Package `gedit' 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/pyclean", line 118, in <module>
    main()
  File "/usr/bin/pyclean", line 102, in main
    pfiles = set(dpf.filter_out_ext(pfiles, ('.so',)))
  File "/usr/share/python/debpython/files.py", line 77, in filter_out_ext
    for fn in files:
  File "/usr/share/python/debpython/namespace.py", line 77, in add_namespace_files
    for fn in files:
  File "/usr/share/python/debpython/files.py", line 53, in from_package
    raise Exception("cannot get content of %s" % package_name)
Exception: cannot get content of gedit
dpkg: error processing gedit:amd64 (--purge):
 subprocess installed pre-removal script returned error exit status 1
Package `gedit' 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/pycompile", line 290, in <module>
    main()
  File "/usr/bin/pycompile", line 263, in main
    options.force, options.optimize, e_patterns)
  File "/usr/bin/pycompile", line 155, in compile
    for fn, versions_to_compile in filter_files(files, e_patterns, versions):
  File "/usr/bin/pycompile", line 110, in filter_files
    for fn in files:
  File "/usr/share/python/debpython/files.py", line 77, in filter_out_ext
    for fn in files:
  File "/usr/share/python/debpython/namespace.py", line 77, in add_namespace_files
    for fn in files:
  File "/usr/share/python/debpython/files.py", line 69, in filter_public
    for fn in files:
  File "/usr/share/python/debpython/files.py", line 53, in from_package
    raise Exception("cannot get content of %s" % package_name)
Exception: cannot get content of gedit
dpkg: error while cleaning up:
 subprocess installed post-installation script returned error exit status 1
Errors were encountered while processing:
 gedit:amd64