Comment 3 for bug 1023964

I'm not sure this is a dependency problem.

I've got the same error, but I seem to have python-launchpadlib and python-launchpadlib-toolkit installed - I wonder if the problem here is that python3-launchpadlib is not installable:

dg@major:~/Documents$ dpkg -l \*launchpad\*|cat
Desired=Unknown/Install/Remove/Purge/Hold
| Status=Not/Inst/Conf-files/Unpacked/halF-conf/Half-inst/trig-aWait/Trig-pend
|/ Err?=(none)/Reinst-required (Status,Err: uppercase=bad)
||/ Name Version Architecture Description
+++-=====================================-===========================================-============-====================================================================================
ii launchpad-integration 0.1.56 all launchpad integration
ii liblaunchpad-integration-3.0-1 0.1.56 amd64 library for launchpad integration
ii liblaunchpad-integration-cil-dev 0.1.56 amd64 CLI bindings for liblaunchpad-integration - development package
ii liblaunchpad-integration-common 0.1.56 all library for launchpad integration common data
un liblaunchpad-integration0 <none> (no description available)
ii liblaunchpad-integration1 0.1.56 amd64 library for launchpad integration
un liblaunchpad-integration1-cil <none> (no description available)
ii liblaunchpad-integration1.0-cil 0.1.56 amd64 CLI bindings for liblaunchpad-integration
ii python-launchpad-integration 0.1.56 amd64 library for launchpad integration
un python-launchpad-integration-dbg <none> (no description available)
ii python-launchpadlib 1.9.12-2 all Launchpad web services client library
ii python-launchpadlib-toolkit 2.1 all convenience library for launchpadlib
un python3-launchpadlib <none> (no description available)
dg@major:~/Documents$ sudo apt-get install python3-launchpadlib
Reading package lists... Done
Building dependency tree
Reading state information... Done
Package python3-launchpadlib is not available, but is referred to by another package.
This may mean that the package is missing, has been obsoleted, or
is only available from another source

E: Package 'python3-launchpadlib' has no installation candidate