update-manager failed to upgrade to 0.87.10: AttributeError: 'NoneType' object has no attribute 'remove_byte_code'

[Cody A.W. Somerville]

Binary package hint: update-manager

update-manager failed to upgrade from gutsy to hardy (update-manager version 0.87.10 at the time) with the following error:

Preparing to replace update-manager 1:0.81 (using .../update-manager_1%3a0.87.10_all.deb) ...

Traceback (most recent call last):

  File "/usr/bin/pycentral", line 1685, in <module>

    main()

  File "/usr/bin/pycentral", line 1679, in main

    rv = action.run(global_options)

  File "/usr/bin/pycentral", line 1180, in run

    pkg.prepare(used_runtimes, old_used_runtimes, old_pkg)

  File "/usr/bin/pycentral", line 803, in prepare

    rt.remove_byte_code(removed_fs)

AttributeError: 'NoneType' object has no attribute 'remove_byte_code'

dpkg: error processing /var/cache/apt/archives/update-manager_1%3a0.87.10_all.deb (--unpack):

 subprocess pre-installation script returned error exit status 1

I was able to get the latest version of update-manager installed by removing update-manager via dpkg -r and letting apt-get reinstall it.