google app engine - GAE webapp2 session: the correct process of creating and checking sessions

Question

I tried to implement GAE's webapp2 session, but there seems very little documentation about it. According to http://webapp-improved.appspot.com/api/webapp2_extras/sessions.html, my steps are as follows:

1.Configure and add config to the main application:

config = {}
config['webapp2_extras.sessions'] = {
    'secret_key': 'my_secret_key',
}
app = webapp2.WSGIApplication([...], config=config)

2.Create session in the login handler

# Delete existent session
  --> not mention in the tutorial
# member is found    
self.session_store = sessions.get_store(request=handler.request)
self.session['account'] = member.account

3.Check if a session exists at various locations in my program

if self.session['account']:
    # Session exists

4.Delete session when user logs out

--> not mentioned in the tutorial

My questions:

1. I got error message " ... object has no attribute 'session'" during the session creation process (Step 2)

2. How do I delete a session in steps 2 and 4?

3. Is the overall session management process correct?

Thanks.

Answer 1

Waitting for answers