With the Managed VM and Container Engine releases today, is there now a way for frontend Python GAE apps and backend Java GAE/GCE apps to share the same development server (esp datastore, taskqueue)?
This was already possible by using multiple modules within a single project. Each module can be written in a different language and all modules use same datastore, taskqueue, etc.
Oh, sorry missed that "development" part. I'm afraid it's not possible. When it comes to managed vms, python local dev server is still not available(java is), so there is no way to know if using same local server will be possible.
I just asked this in #google-containers IRC channel, and ~isdal chimed in to say this is now possible -- "The new gcloud SDK allows you to run multiple docker containers at the same time with all of them sharing the same datastore (and other APIs".