Comment 9 for bug 689306

for #8, see bug #689615.

for anything else:

 - run: dpkg -l python-minimal python python-dev
   see which packages are installed (lines starting with ii)
 - get these packages from
   https://launchpad.net/ubuntu/+source/python-defaults
   (search for Natty Nharwhal), select the version and
   follow the build link)
 - get the python2.7-minimal and python2.7 package from
   https://launchpad.net/ubuntu/+source/python2.7
 - use sudo dpkg --unpack to unpack these packages.
   Maybe you need to use dpkg --unpack --force-depends
 - run sudo dpkg --configure --pending
 - finish with an apt-get update && apt-get dist-upgrade