from django.contrib.sessions.backends.db import SessionStore
s = SessionStore()
# stored as seconds since epoch since datetimes are not serializable in JSON.
s['last_login'] = 1376587691
s.create()
s.session_key
'2b1189a188b44ad18c35e113ac6ceead'
s = SessionStore(session_key='2b1189a188b44ad18c35e113ac6ceead')
s['last_login']
1376587691