root@xubuntu:/tmp# apt-get install apt-xapian-index python3-xapian1.3
Reading package lists... Done
Building dependency tree       
Reading state information... Done
The following additional packages will be installed:
  libxapian-1.3-5
Suggested packages:
  xapian-tools xapian-doc
The following NEW packages will be installed:
  apt-xapian-index libxapian-1.3-5 python3-xapian1.3
0 upgraded, 3 newly installed, 0 to remove and 4 not upgraded.
Need to get 0 B/1,046 kB of archives.
After this operation, 4,945 kB of additional disk space will be used.
Do you want to continue? [Y/n] 
(Reading database ... 427773 files and directories currently installed.)
Preparing to unpack .../libxapian-1.3-5_1.3.4-0ubuntu4_amd64.deb ...
Unpacking libxapian-1.3-5 (1.3.4-0ubuntu4) ...
Selecting previously unselected package python3-xapian1.3.
Preparing to unpack .../python3-xapian1.3_1.3.4-0ubuntu1_amd64.deb ...
Unpacking python3-xapian1.3 (1.3.4-0ubuntu1) ...
Selecting previously unselected package apt-xapian-index.
Preparing to unpack .../apt-xapian-index_0.47ubuntu6_all.deb ...
Unpacking apt-xapian-index (0.47ubuntu6) ...
Processing triggers for libc-bin (2.21-0ubuntu5) ...
Processing triggers for doc-base (0.10.6) ...
Processing 1 added doc-base file...
Error in `/usr/share/doc-base/xapian-python3-docs', line 9: all `Format' sections are invalid.
Note: `install-docs --verbose --check file_name' may give more details about the above error.
Registering documents with dwww...
Registering documents with scrollkeeper...
Processing triggers for dbus (1.10.6-1ubuntu1) ...
Processing triggers for man-db (2.7.5-1) ...
Setting up libxapian-1.3-5 (1.3.4-0ubuntu4) ...
Setting up python3-xapian1.3 (1.3.4-0ubuntu1) ...
Setting up apt-xapian-index (0.47ubuntu6) ...
apt-xapian-index: Building new index in background...
Processing triggers for libc-bin (2.21-0ubuntu5) ...
Processing triggers for dbus (1.10.6-1ubuntu1) ...