Bruno is correct, and that's the whole point of Storage is that you don't
have to test request.vars, you just call it. Alternatively, you can treat
Storage just like any other dict().
For your example, there are many ways to solve the above example:
if 'sort' in request.vars:
sort = request.vars.sort
else:
sort = 'created'
And then there's the one-line solution:
sort = request.vars.get('sort', 'created')
This line accomplishes the same thing, except better. If request.vars has
'sort', then return its value, otherwise return 'created'.
