[Python-Dev] Expression optimizations

Daniel Stutzbach daniel at stutzbachenterprises.com
Tue Feb 10 17:38:55 CET 2009


On Tue, Feb 10, 2009 at 10:24 AM, Cesare Di Mauro <cesare.dimauro at a-tono.com
> wrote:

> Could it be applyable to other operations as well? So, if I wrote:
>  c = not(a < b)
> the compiler and/or peephole optimizer can generate bytecodes instructions
> which, instead, execute the following operation:
>  c = a >= b
>

Those two expressions are equivalent for integers, but not necessarily
equivalent for objects that define their own comparison operator.

--
Daniel Stutzbach, Ph.D.
President, Stutzbach Enterprises, LLC <http://stutzbachenterprises.com>
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