detecting disc serial number without win32

[PiErre]

Hi,
  I have to run a python script on a Linux machine. This script was
developed on a windows workstation and it
uses the win32 library to detect the cd (or dvd) serial number (in the
XXXX-XXXX format).
How can I change the script to do the same task on linux?
I found an old post on the same task [ "(Joliet) volume name and
serial number" on  26 Feb 2003 ]
but without answer...
Any chance there is now a way of implement such a low-level feature?
TIA!
bye,
   PiErre