How to find user id from session_data from django_session table?

I had trouble with Paulo’s method (see my comment on his answer), so I ended up using this method from a scottbarnham.com blog post:

from django.contrib.sessions.models import Session
from django.contrib.auth.models import User

session_key = '8cae76c505f15432b48c8292a7dd0e54'

session = Session.objects.get(session_key=session_key)
uid = session.get_decoded().get('_auth_user_id')
user = User.objects.get(pk=uid)

print user.username, user.get_full_name(), user.email