(original) (raw)

Input = normal 2.x code; Output = code that runs on both 2.x and 3.x.

That is, tinkering with what 2to3 produces, not what it accepts.

--
Nick Coghlan (via Gmail on Android, so likely to be more terse than usual)

On Dec 13, 2011 11:46 PM, "Michael Foord" <fuzzyman@voidspace.org.uk> wrote:

On 13/12/2011 13:33, Laurence Rowe wrote:

On Mon, 12 Dec 2011 22🔞40 +0100, Chris McDonough <chrism@plope.com> wrote:

On Mon, 2011-12-12 at 09:50 -0500, PJ Eby wrote:

� � � �As someone who ported WebOb and other stuff built on top of it
� � � �to Python
� � � �3 without using "from \_\_future\_\_ import unicode\_literals", I'm
� � � �kinda sad
� � � �that to be using best practice I'll have to go back and flip
� � � �the
� � � �polarity on everything.

Eh? �If you don't need unicode\_literals, what's the problem?

Porting the WebOb code sucked. �It's only about 5K lines of code but the
porting effort took me about 80 hours. �Some of the problem is certainly
my own idiocy, but some of it is just because straddling code across
Python 2 and Python 3 currently requires that you change lots and lots
of code for suspect benefit.

Could this manual work be cut down if there was a version of 2to3 that targeted the subset of the language that is compatible with both 2 and 3? That would seem to avoid most of the drawbacks to the current 2to3 approach.

I'm not sure what you mean, but it \*reads\* as if you mean "a version of 2to3 that only converts code that doesn't need converting". Could you clarify?

Thanks,

Michael

Laurence

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