[Python-Dev] 3to2 Project

[Ron DuPlain]

On Wed, Apr 1, 2009 at 12:50 PM, Ron DuPlain <ron.duplain at gmail.com> wrote:
> On Mon, Mar 30, 2009 at 9:29 PM, Benjamin Peterson <benjamin at python.org> wrote:
>> 2009/3/30 Collin Winter <collinw at gmail.com>:
>>> If anyone is interested in working on this during the PyCon sprints or
>>> otherwise, here are some easy, concrete starter projects that would
>>> really help move this along:
>>> - The core refactoring engine needs to be broken out from 2to3. In
>>> particular, the tests/ and fixes/ need to get pulled up a directory,
>>> out of lib2to3/.
>>> - Once that's done, lib2to3 should then be renamed to something like
>>> librefactor or something else that indicates its more general nature.
>>> This will allow both 2to3 and 3to2 to more easily share the core
>>> components.
>>
>> FWIW, I think it is unfortunately too late to make this change. We've
>> already released it as lib2to3 in the standard library and I have
>> actually seen it used in other projects. (PythonScope, for example.)
>>
>
> Paul Kippes and I have been sprinting on this.  We put lib2to3 into a
> refactor package and kept a shell lib2to3 to support the old
> interface.
>
> We are able to run 2to3, 3to2, lib2to3 tests, and refactor tests.  We
> only have a few simple 3to2 fixes now, but they should be easy to add.
>  We kept the old lib2to3 tests to make sure we didn't break anything.
> As things settle down, I'd like to verify that our new lib2to3 is
> backward-compatible (since right now it points to the new refactor
> lib) with one of the external projects.
>
> We've been using hg to push changesets between each other, but we'll
> be committing to the svn sandbox before the week is out.  I'm heading
> out today, but Paul is sticking around another day.
>
> It's a start,
>
> Ron
>

See sandbox/trunk/refactor_pkg.
More fixers to come...

-Ron