
On 5/28/2014 6:26 PM, Glyph Lefkowitz wrote:
I hope it's not controversial to say that most new Python code is still being written against Python 2.7 today;
Given that Python 3 downloads now outnumber Python 2 downloads, I think 'most' might be an overstatement. But I think it a moot point.
if people are writing that code in such a way that it's not 3-friendly, it should be a more immediately noticeable issue.
If the truth were, conservatively, 1/4 of new Python code in 2.7, or even less, I would still be in favor of making 3-friendly 2.7 code easier. This is also important for the separate codebase approach, as in the stdlib. Just last week, I got a rejected chunk when backporting because a 2.7 idlelib module uses 'file(...' instead of 'open(...'. -- Terry Jan Reedy