Comment 2 for bug 985062

In the DpkgTerminalLog.txt is has the line:
dpkg: error processing /var/cache/apt/archives/python3_3.2.3-0ubuntu1_all.deb (--unpack)

This is an indication of either file system corruption on your system or a corrupted package. You can try fixing this by doing the following:

wget https://launchpad.net/ubuntu/+source/python3-defaults/3.2.3-0ubuntu1/+build/3407363/+files/python3_3.2.3-0ubuntu1_all.deb

That should retrieve another copy of the python3 .deb file in the directory from which you ran the command. Then do:

sudo dpkg -i python3_3.2.3-0ubuntu1_all.deb

This problem is not an indication of a bug in the package.