[Python-Dev] IO implementation: in C and Python?

[Guido van Rossum]

On Fri, Feb 20, 2009 at 4:01 AM, Antoine Pitrou <solipsis at pitrou.net> wrote:
> Georg Brandl <g.brandl <at> gmx.net> writes:
>>
>> I just hope everyone updates both versions when making changes to IO.
>
> My proposal is just organizational, it is neutral in terms of whether or not the
> Python version is correctly maintained.

I worry that with your proposal people are once again going to import
the pure Python version where they shouldn't. Maybe _pyio.py would
work though?

> We can hope that the IO lib *semantics* won't change too much in the future
> (although there is an IMO legitimate request for a setblocking() method:
> http://bugs.python.org/issue949667). On the other hand, I don't expect anyone to
> willingly use the Python version if the C version is available.

Hoping that modules won't evolve is futile. The concern for divergence
is real. Unit-testing both with the same tests might be the solution.

-- 
--Guido van Rossum (home page: http://www.python.org/~guido/)