I got this:

ii python2.5 2.5.2-1osso4 An interactive high-level object-oriented la
ii python2.5-bluez 0.9.1-1osso2 Python wrappers around BlueZ
ii python2.5-cairo 1.4.0-1osso2 Python bindings for the Cairo vector graphic
ii python2.5-conic 0.1-1osso3 Python bindings for ConIc Framework.
ii python2.5-dbus 0.82-4osso2 Python wrappers around D-Bus.
ii python2.5-gnome 2.18.0-1osso4 Python bindings for GConf and GnomeVFS
ii python2.5-gobject 2.14.1-1osso2 Python bindings for the GTK+ widget set
ii python2.5-gstreamer 0.10.5-0osso2 generic media-playing framework (Python bind
ii python2.5-gtk2 2.12.1-1osso4 Python bindings for the GTK+ widget set
ii python2.5-hildon 0.8.9-1osso2 Python bindings for Hildon Framework.
ii python2.5-hildondesktop 0.0.2-2 Python bindings for libhildondesktop
ii python2.5-id3lib 0.5.1-1osso2 id3lib wrapper for Python - library
ii python2.5-imaging 1.1.6-1osso3 Python Imaging Library
ii python2.5-numeric 24.2-1osso5 Numerical (matrix-oriented) Mathematics for
ii python2.5-osso 0.3-1osso4 Python bindings for Libosso library
ii python2.5-pygame 1.7.1-1osso2 SDL bindings for games development in Python
ii python2.5-pyinotify 0.7.1-1osso3 Pyinotify is a Python module for watching fi
ii python2.5-runtime c1.0-6 Python runtime environment.
ii python2.5-xml 0.8.4-1osso9 XML tools for Python

So I see that the py Runtime is installed.
How can I configure the repositories ?