[Python-Dev] Expression optimizations

[Antoine Pitrou]

Cesare Di Mauro <cesare.dimauro <at> a-tono.com> writes:
> 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
> 
> Is it right?

No, it would be a bogus optimization:

>>> a = set([1])
>>> b = set([2])
>>> a < b
False
>>> a >= b
False

Regards

Antoine.