You are right: supported in GAE runtime, so after your app is deployed, not in local development environment.
-- You received this message because you are subscribed to the Google Groups "Google App Engine" group. To unsubscribe from this group and stop receiving emails from it, send an email to google-appengine+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/google-appengine/c15bbfe6-c5b5-4eee-a065-0fae14e017b9%40googlegroups.com.
