Determine last post sent from each mailman list

mailman_tools.py

#!/usr/bin/env python
'''
http://benjaminjchapman.wordpress.com/2010/06/02/determining-last-post-sent-from-each-mailman-list/
~mailman/bin/withlist -a -r mailman_tools.last_post > mailman_last_posts.csv
'''

import os
import time

print '"Name","Last","Owners"'

def last_post(mlist):
    name = mlist.real_name
    last = time.strftime('%Y-%m-%d %H:%M:%S', time.localtime(mlist.last_post_time))
    owner = '; '.join(mlist.owner)
    print '"%s","%s","%s"' % (name, last, owner)
    return