Re: [Python-Dev] PEP 495 accepted

2015年9月22日 13:16:50 -0700

On Sep 22, 2015 1:09 PM, "Alexander Belopolsky" <
[email protected]> wrote:
>
>
> On Tue, Sep 22, 2015 at 3:32 PM, Guido van Rossum <[email protected]>
wrote:
>>
>> it is broken, due to the confusion about classic vs. timeline arithmetic
-- these have different needs but there's only one > operator.
>
>
> I feel silly trying to defend a design against its author. :-) Yes, a
language with more than one > symbol would not have some of these
problems. Similarly a language with a special symbol for string catenation
would not have a non-commutative + and non-distributive *. All I am saying
is that I can live with the choices made in datetime.
Is there a good argument against at least deprecating inequality
comparisons and subtraction between mixed timezone datetimes? It seems like
a warning that would be likely to catch real bugs.
-n
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