interactive terminal in Ubuntu Linux : libreadline5-dev works only in Python 2.6 not 3.1

[Dave]

>The python 3 version in the 9.10 repo is 3.1.1
>
>Actually, if I/O is important, I'd recommend a full install of 9.10 so that
>you can get the ext4 file system. I have found it offers some very
>impressive speedups with the disk -- especially for deleting files.

Thanks casevh and Lee.
I intend to remove all versions python 3, update Ubuntu to 9.10
and then do a clean installation of python 3.1.1 via Synaptic.
Dave  WB3DWE