On 24 March 2015 at 08:22, Greg Ewing <greg.ew...@canterbury.ac.nz> wrote:
> Martin Teichmann wrote:
>>
>> maybe
>> we could just change the compiler to leave the order in which things are
>> defined
>> in a class in the class namespace, say as a member __order__? Then we
>> could
>> use plain-old dicts for the class namespace, and we would not slow down
>> class
>> creation (not that it matters much), as determining the order would happen
>> at
>> compile time.
>
>
> I don't think the compiler can determine the order in
> all cases. Consider:
>
> class Spam:
>
> if moon_is_full:
> alpha = 1
> beta = 2
> else:
> beta = 2
> alpha = 1
This is also expected to work in class namespaces:
locals()["alpha"] = 1
The language reference suggests it isn't, there's an open tracker
issue I filed some time ago to suggest clarifying it but haven't found
the time to actually sit down and come up with readable wording:
http://bugs.python.org/issue17960
Cheers,
Nick.
--
Nick Coghlan | ncogh...@gmail.com | Brisbane, Australia
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