[Python-Dev] PEP 495 accepted (original) (raw)

Nathaniel Smith njs at pobox.com
Tue Sep 22 22:14:58 CEST 2015

On Sep 22, 2015 1:09 PM, "Alexander Belopolsky" < alexander.belopolsky at gmail.com> wrote:

On Tue, Sep 22, 2015 at 3:32 PM, Guido van Rossum <guido at python.org> 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.

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