[Python-ideas] constant/enum type in stdlib

[Michael Foord]

On 30 January 2013 01:27, Barry Warsaw <barry at python.org> wrote:

> On Jan 28, 2013, at 11:50 PM, Joao S. O. Bueno wrote:
>
> >And it was not dismissed at all - to the contrary the last e-mail in the
> >thread is a message from the BDLF for it to **be** ! The discussion
> happened
> >in a bad moment as Python was mostly freature froozen for 3.2 - and it did
> >not show up again for Python 3.3;
>
> I still offer up my own enum implementation, which I've used and has been
> available for years on PyPI, and hasn't had a new release in months
> because it
> hasn't needed one. :)  It should be compatible with Pythons from 2.6 to
> 3.3.
>
> http://pypi.python.org/pypi/flufl.enum
>
> The one hang up about it the last time this came up was that my enum items
> are
> not ints and Guido though they should be.  I actually tried at one point to
> make that so, but had some troublesome test failures that I didn't have
> time
> or motivation to fix, mostly because I don't particularly like those
> semantics.  I don't remember the details.
>
> However, if someone *else* wanted to submit a branch/patch to have enum
> items
> inherit from ints, and that was all it took to have these adopted into the
> stdlib, I would be happy to take a look.
>
>

Being an int subclass (and possibly optionally a strs subclass) is a
requirement if any adopted Enum is to be used *within* the standard library
in places where integers are currently used as "poor man's enums". I also
don't *think* flufl.enum supports flag enums (ones that can be OR'd
together), right?

Michael


> Cheers,
> -Barry
>
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>


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