> How will this migration to TG 2.0 with Pylon affect existing user
> projects that currently use the current 1.x TG code base? Most
> importantly for my team, what are the TG teams plans for legacy code
> compatibility and clearly defined migration paths if required?

There will be a clearly defined migration path from 1.x to 2.0, and
1.x versions will be actively maintained after 2.0 is out for a
significant amount of time so you'll be able to migrate on whatever
schedule is right for your project.   Since we're using a new package
name, we even have the option of keeping the 1.x line around and
supported for a very, very, very long time.

As for migration paths, even though we will switch default model and
template engine to SQLAlchemy and Genshi, Kid and SQLObject will be
supported in 2.0.

So, unless you are doing some trickery, you will be able to copy over
you models wholesale, and many of templates should also be trivial to
migrate. The only places you'll have to do migration will be in your
controller code, and possibly your tests.

Before we release 2.0 there will be a clearly documented list of
changes, and a migration checklist.

--Mark Ramm

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