[Datetime-SIG] Making tm_gmtoff and tm_zone available on all platforms

[Guido van Rossum]

OK, I think this is fine then.



On Mon, Sep 28, 2015 at 8:29 PM, Alexander Belopolsky <
alexander.belopolsky at gmail.com> wrote:

>
> On Mon, Sep 28, 2015 at 11:04 PM, Guido van Rossum <guido at python.org>
> wrote:
> >
> > I had been wondering about that myself. But your implementation proposal
> sounds kind of expensive, doesn't it?
>
>
> It could be with a naive implementation that would simply fill additional
> fields in the existing time.struct_time object, but we can also modify the
> struct_time class to compute the additional attributes only when they are
> requested.  (I believe struct_time is currently implemented as
> PyStructSequence, so we will probably need to subclass that somehow.)
>
> On the other hand, I would start with a naive implementation and worry
> about the optimizations later.  As far as I know, the POSIX layer on
> Windows (which is the main platform that will be affected) is already very
> slow, so the price of cross-platform portability may be within user
> expectations in this case.
>



-- 
--Guido van Rossum (python.org/~guido)
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