[Python-3000] lib2to3 refactor.py has a lot of 2.6-isms

Raymond Hettinger python at rcn.com
Fri Jul 25 06:34:48 CEST 2008

The intended upgrade path is through 2.6.
If you go straight from 2.5, you don't get
to go through a step with the -3 warnings
and optional text/bytes annotations.

IMO, it would be a mistake to create a 2.5 to 3.0 converter.


----- Original Message ----- 
From: "Robert Brewer" <fumanchu at aminus.org>
To: "Python 3000" <python-3000 at python.org>
Sent: Thursday, July 24, 2008 9:24 PM
Subject: [Python-3000] lib2to3 refactor.py has a lot of 2.6-isms

> The README at
> http://svn.python.org/view/sandbox/trunk/2to3/README?rev=65003&view=auto
> says: "2to3 must be run (at the moment) with Python 2.x!" However, it
> doesn't even import under 2.5.2 because of print() statements,
> 'Exception as err', .relative imports, etc.
> Is this an attempt to make people upgrade to 2.6 before converting to 3?
> Or is the desire to eventually run under 3.0? If neither, would y'all
> welcome a version that ran under 2.5? I'd be happy to try my hand at
> that.
> Robert Brewer
> fumanchu at aminus.org
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