Facebook logout (Flask)

views.py

@login_required
def handle_logout():
    import facebook

    if g.user.facebook_id:
        base_domain     = util.get_base_domain()
        default_fb_data = FB_DATA['appspot.com']
        fb_app_id       = FB_DATA.get(base_domain, default_fb_data).get('appid')
        fb_app_secret   = FB_DATA.get(base_domain, default_fb_data).get('appsecret')
        cookie = facebook.get_user_from_cookie(request.cookies, fb_app_id, fb_app_secret)

        if cookie:
            graph = facebook.GraphAPI(cookie["access_token"])
            try:
                graph.revoke_auth(g.user.facebook_id)
            except facebook.GraphAPIError, e:
                logging.info(e)
    if SESSION_USERID in session:
        session.pop(SESSION_USERID)
    return redirect_response(url_for('landing'))