[Python-Dev] PEP 435 -- Adding an Enum type to the Python standard library
Barry Warsaw
barry at python.org
Thu Apr 25 21:30:19 CEST 2013
On Apr 25, 2013, at 11:42 AM, Antoine Pitrou wrote:
>The PEP should mention how to get an enum from its raw value:
>
> >>> Colors[1]
> <EnumValue: Colors.red [value=1]>
>
>or:
>
> >>> Colors(1)
> <EnumValue: Colors.red [value=1]>
No, this is a failed experiment. It's deprecated in flufl.enum and shouldn't
make it into stdlib enum. getitem syntax is TOOWTDI.
>It would perhaps be nice to have a .get() method that return None if the
>raw value is unknown:
>
> >>> Colors(42)
> ...
> ValueError: 42
> >>> Colors.get(42)
> >>>
class Methods(Enum):
set = 1
get = 2
delete = 3
What is "Methods.get"?
Catching the ValueError ``Methods[5]`` would raise doesn't seem so bad.
-Barry
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