Newbie question--help

[app engine dude]

hi,

Iam developing an app that has session management included.My page has
login for vieing the main page.after checking the login it sets the
session like this

self.session = Session()
self.session['username']=username

while retriving the session variable it is done like this...

self.session = Session()
user=self.session['username']

This works fine...but some times...there was an error being displayed
as...

'username'
Traceback (most recent call last):
File "/base/python_lib/versions/1/google/appengine/ext/webapp/
__init__.py", line 501, in __call__
handler.get(*groups)
File "/base/data/home/apps/****/
1.331808180605034694/21_test_demo.py", line 190, in get
user=self.session['username']
File "/base/data/home/apps/****/1.331808180605034694/
appengine_utilities/sessions.py", line 396, in __getitem__
raise KeyError(str(keyname))
KeyError: 'username'

**** corresponds to my app name...

plz hep me out with this...

Thanx in advance.

[Joe Bowman]

So, you're getting that error when you attempt to write the session
data? What version are you using?

[app engine dude]

Nope...Its not every time. Only few times the error appears.I dont
know why...

[Joe Bowman]

I'd first upgrade to the latest version, 1.2. Judging by the error
string you're using an older version of the session class.

[app engine dude]

kk...i would upgrade my version and try if da same happens.....i would
report it if i get it back.
thanq 4 da response.