def leave_site(): site_id = int(request.form.get('site_id', -1)) site = Site.get_or_404(site_id) user = users.get_current_user() them = [u for u in site.users if u.user_id() == user.user_id()] for user in them: site.users.remove(user) if user in site.admins: site.admins.remove(user) site.put() return 'OK'