[web2py] sessions2trash.py "global name 'db' is not defined"

[Chris]

Hello,

I am getting an error when I run the following script in my web2py
directory:

# python web2py.py -S init -R scripts/sessions2trash.py
web2py Web Framework
Created by Massimo Di Pierro, Copyright 2007-2011
Version 1.99.2 (2011-09-26 06:55:33) stable
Database drivers available: SQLite3, PostgreSQL, mongoDB
Traceback (most recent call last):
  File "/var/web2py/cow/gluon/shell.py", line 206, in run
    execfile(startfile, _env)
  File "scripts/sessions2trash.py", line 222, in <module>
    main()
  File "scripts/sessions2trash.py", line 211, in main
    set_db.trash()
  File "scripts/sessions2trash.py", line 53, in trash
    for item in self.get():
  File "scripts/sessions2trash.py", line 98, in get
    if tablename in db:
NameError: global name 'db' is not defined

Is there something getting stuck here? My models/db.py file depends on
a lot of other model files and modules, so perhaps it has something to
do with that.