from paste.session import SessionMiddleware

def myapp(environ, start_response):
    session = environ['paste.session.factory']()
    
    if 'count' in session: 
         count = session['count']
    else:
         count = 1
    session['count'] = count + 1
    
    start_response('200 OK', [('Content-Type', 'text/plain')])
    return ['You have been here %d times!\n' % count]

    
class myapp2:

    def __init__(self, environ, start_response):
        self.environ = environ
        self.start = start_response

    def __iter__(self):
        session = self.environ['paste.session.factory']()
        
        if 'count' in session:
             count = session['count']
        else:
             count = 1
        session['count'] = count + 1

        self.start('200 OK', [('Content-type','text/plain')])
        yield 'You have been here %d times!\n' % count

    
app = SessionMiddleware(myapp)
app2 = SessionMiddleware(myapp2)

if __name__ == '__main__':
    from wsgiref import simple_server
    
    # if you want to test the function-based wsgi application, change app2 to app
    httpd = simple_server.make_server('', 8080, app2)
    try:
        httpd.serve_forever()
    except KeyboardInterrupt:
        pass