easy_install beaker

#!/usr/bin/env python
from bottle import route, default_app, run, request
from beaker.middleware import SessionMiddleware

session_opts = {
        'session.type':'file',
        'session.cookei_expires':300,
        'session.data_dir':'./sessions',
        'sessioni.auto':True
        }

@route('/test')
def test():
  s = request.environ.get('beaker.session')
  s['test'] = s.get('test', 0) + 1
  s.save()
  return 'Test conter: %d' % s['test']

app = default_app()
app = SessionMiddleware(app, session_opts)
run(app=app)

Bottle server starting up (using WSGIRefServer())...
Listening on http://127.0.0.1:8080/
Hit Ctrl-C to quit.