gistfile1.py

import cPickle
import gzip
import redis
from datetime import datetime

rds = redis.StrictRedis(host='localhost', port=6379, db=0)

panelist_dates = {int(p): {datetime.strptime(d, '%Y-%m-%d').date()
                           for d in rds.smembers('panelists:%s:dates' % p)
                           }
                  for p in rds.smembers('panelists')}

f = gzip.open('panelist_membership_dates.p.gz', 'w')

cPickle.dump(panelist_dates, f)