ubuntu-dev-tools/ubuntu-iso

#!/usr/bin/python

# ubuntuiso - tool to examine Ubuntu CD (ISO) installation media
# Copyright (C) 2008 Canonical Ltd.
# Author: Matt Zimmerman <mdz@ubuntu.com>
#
# ##################################################################
#
# This program is free software; you can redistribute it and/or
# modify it under the terms of the GNU General Public License
# as published by the Free Software Foundation, version 2
# of the License.
# 
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
# 
# See file /usr/share/common-licenses/GPL-2 for more details.
#
# ##################################################################

import sys
import subprocess

def extract(iso, path):
	command = ['isoinfo', '-R', '-i', iso, '-x', path]
	pipe = subprocess.Popen(command, stdout=subprocess.PIPE, stderr=subprocess.PIPE)
	stdout, stderr = pipe.communicate()

	if pipe.returncode != 0:
		raise Exception, stderr

	return stdout

def main():
	iso = sys.argv[1]

	version = extract(iso, '/.disk/info')
	print version

if __name__ == '__main__':
	main()
	sys.exit(0)