Comment 21 for bug 1612948

For 16.04 LTS we can use

`sudo cp /usr/lib/python3.5/configparser.py /usr/lib/python3.5/ConfigParser.py`

And please note that problem is also seen on AskUbuntu - https://askubuntu.com/a/1049264/66509 .

But it is not enough - search is broken:

$ sudo rm -rf /var/lib/apt-xapian-index/
$ sudo apt-get update
$ sudo update-apt-xapian-index -f

$ axi-cache info
Main data directory: /var/lib/apt-xapian-index
Update timestamp: /var/lib/apt-xapian-index/update-timestamp (last updated: Sun Jun 24 13:20:47 2018)
Index location: /var/lib/apt-xapian-index/index (pointing to /var/cache/apt-xapian-index/index.2)
Documentation of index contents: /var/lib/apt-xapian-index/README
Documentation of available prefixes: /var/lib/apt-xapian-index/prefixes
Documentation of available values: /var/lib/apt-xapian-index/values
Plugin directory: /usr/share/apt-xapian-index/plugins
Plugin status:
  aliases enabled, up to date (114 days, 15:36:31.425668 older than index)
  app-install enabled, up to date (1018 days, 2:46:20.425668 older than index)
  apttags enabled, up to date (0:00:00 older than index)
  cataloged_time enabled, up to date (0:00:00 older than index)
  debtags disabled
  descriptions enabled, up to date (0:00:00 older than index)
  relations enabled, up to date (0:00:00 older than index)
  sections enabled, up to date (0:00:00 older than index)
  sizes enabled, up to date (0:00:00 older than index)
  template enabled, up to date
  translated-desc enabled, up to date (4 days, 4:00:57.425668 older than index)
Values:
  Value Code Provided by
  app-popcon 3 app-install
  catalogedtime 4 cataloged_time
  installedsize 1 sizes
  packagesize 2 sizes
  version 0 update-apt-xapian-index
Data sources:
  Source Description Used by
  /var/lib/apt-xapian-index/cataloged_times.p first-seen information for every package cataloged_time
  /usr/share/apt-xapian-index/aliases/popular-apps Aliases expanding names of popular applications aliases
  /var/cache/apt/pkgcache.bin APT index apttags, descriptions, relations, sections, sizes
  /usr/share/app-install/desktop/ .desktop files provided by app-install-data app-install

$ axi-cache search app
277 results found.
Results 1-20:
100% b'address-book-app-dbg' - (unknown by apt)
99% b'mediaplayer-app-autopilot' - (unknown by apt)
98% b'python-app-catalog-ui' - (unknown by apt)
98% b'ubuntu-app-test' - (unknown by apt)
98% b'gir1.2-ubuntu-app-launch-2' - (unknown by apt)
97% b'notes-app-autopilot' - (unknown by apt)
96% b'messaging-app-autopilot' - (unknown by apt)
96% b'camera-app-autopilot' - (unknown by apt)
95% b'dialer-app-autopilot' - (unknown by apt)
95% b'libghc-wai-app-file-cgi-doc' - (unknown by apt)
95% b'libubuntu-app-launch2-dev' - (unknown by apt)
94% b'reminders-app-autopilot' - (unknown by apt)
94% b'address-book-app-autopilot' - (unknown by apt)
94% b'libplack-app-proxy-perl' - (unknown by apt)
94% b'libubuntu-app-launch2' - (unknown by apt)
93% b'libmoosex-app-cmd-perl' - (unknown by apt)
92% b'libmoosex-app-perl' - (unknown by apt)
92% b'lynkeos.app' - (unknown by apt)
89% b'python-zope.app.appsetup' - (unknown by apt)
82% b'phoneui-apps' - (unknown by apt)
Did you mean: b'api' ?
Traceback (most recent call last):
  File "/usr/bin/axi-cache", line 852, in <module>
    sys.exit(ui.perform())
  File "/usr/bin/axi-cache", line 847, in perform
    return f(self.args)
  File "/usr/bin/axi-cache", line 547, in do_search
    self.print_matches(self.db.get_matches())
  File "/usr/bin/axi-cache", line 808, in print_matches
    sugg = self.clean_suggestions(self.db.get_suggestions(count=7, filter=DB.TermFilter(stemmer=self.db.stem, exclude=self.args)))
  File "/usr/bin/axi-cache", line 310, in get_suggestions
    return self.enquire.get_eset(count, rset, filter)
  File "/usr/bin/axi-cache", line 118, in __call__
    return term[0].islower()
AttributeError: 'int' object has no attribute 'islower'

So the axi-cache is still broken.