$ seeded-in-ubuntu python-rpy seeded-in-ubuntu: Error: The source package 'python-rpy' does not exist in the Ubuntu primary archive in quantal, quantal-security, quantal-updates or quantal-proposed
$ seeded-in-ubuntu python-rpy
seeded-in-ubuntu: Error: The source package 'python-rpy' does not exist in the Ubuntu primary archive in quantal, quantal-security, quantal-updates or quantal-proposed