[Python-Dev] PEP 435 -- Adding an Enum type to the Python standard library

Ethan Furman ethan at stoneleaf.us
Fri Apr 26 07:17:23 CEST 2013

On 04/25/2013 10:01 PM, Steven D'Aprano wrote:
> On 26/04/13 13:22, Greg wrote:
>> On 26/04/2013 3:12 p.m., Glenn Linderman wrote:
>>> On 4/25/2013 7:49 PM, Nick Coghlan wrote:
>>>> You couldn't create an enum of callables, but that would be a
>>>> seriously weird thing to do anyway....
>>> But aren't all classes callable?
>> An enum of classes would be seriously weird as well, I think.
> I don't think iscallable will work, since that descriptors like
> staticmethod and classmethod aren't callable. Nor are properties.
> I think a solution may be an explicit decorator that tells the
> metaclass not to skip the object into an enum value:

Another option is to check if the item is a descriptor (class, static, property, or other); yet another option is to 
check if the item is the type of the enum class (int for IntEnum, str for StrEnum, etc.).

The code I posted earlier checks for callable and type -- checking for descriptor also would not be much more effort.


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