I know I said otherwise before but perhaps we should continue to default to 2.5 until App Launcher supports 2.7
On Nov 5, 1:28 pm, Jonathan Lundell <jlund...@pobox.com> wrote: > I thought I'd pass on my recent experience deploying an app to GAE with > Python 2.7. My motivation was the new features available, in particular > concurrent requests and WSGI operation, and secondarily some other > performance improvements (like the native JSON library). > Seehttp://code.google.com/appengine/docs/python/python27/newin27.htmlfor more > info. > > There are a couple of downsides. > > 1. The App Launcher doesn't support 2.7 yet, so you need to deploy from the > command line. I'm not entirely clear on whether there's any way at all to run > a 2.7 app locally. > > 2. You must use the High Replication datastore. That's not necessarily a bad > thing, but a) it's more expensive (if you have enough traffic to be paying), > and b) run_in_transaction only works with ancestor queries, which the DAL > does not support. > > Fortunately, my db requirements aren't too complicated, and I was able to put > all my db accesses behind a class that allowed me to talk to the datastore > through its native API while preserving compatibility with DAL on other > servers. (There were some other advantages to doing this, and it was an > interesting learning experience.) > > The trunk's app.example.yaml defaults to 2.7; that part was fairly simple (it > supports 2.5 as well; just change some commenting-out stuff). > > I like the way GAE is going, and I really like being able to deploy an app in > the cloud without having to become a sysadmin.
