FYI,

Google App Engine is based on Python 2.5.  Python 2.7 support is on
their roadmap (http://code.google.com/appengine/docs/roadmap.html ) but
the roadmap hasn't really changed much (at least wrt to this issue) in
the last six months or so.

In the meantime, GAE has become basically the only reason to support
Python 2.5 in Pyramid.  Supporting Python 2.5 is a bit of a burden right
now, especially as we start to port things to Python 3.  As a result, we
will drop Python 2.5 support (and therefore GAE support, unless they've
moved to 2.7 by then) in Pyramid 1.2.

Existing users of Pyramid on GAE can of course continue to use Pyramid
1.1 and 1.0, but they may need to start to "pin" versions of Pyramid
dependencies as those evolve and also begin to drop Python 2.5 support.
When that becomes necessary, I'll attempt to write up a pinning document
to provide those folks with guidance as to which versions of
dependencies they'll need to pin.

Comments of course welcome (esp. if you have inside info about when the
GAE move might happen :-) )

- C


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