Eko palypse wrote:
> I'm fairly new when it comes to metaclass programming and therefore the
> question whether the following makes sense or not.
>
> The goal is to have two additional class properties which return a
> dictionary name:class_attribute and value:class_attribute for an IntEnum
> class and after reading about it I came to the conclusion that the
> following code might do what I want, and it does do the job BUT does it
> make sense also?
>
> Meaning, my ultimate goal would be to be able to decide myself
> if this is a good or bad idea doing this, so what do I need to
> read/understand in order to achieve such a goal.
My objections have nothing to do with metaclass technicalities, but
> from enum import EnumMeta, IntEnum
>
> class EnhancedIntEnum(EnumMeta):
> @property
> def names(cls):
> return {k: v for k, v in cls.__members__.items()}
this is basically a writeable copy of __members__. Using
Ordinal.__members__
directly should be better in most cases, and if you really need a copy
Ordinal.__members__.copy()
or
dict(Ordinal.__members__)
is pretty clear and concise enough.
If you want to convert a str use Ordinal["WEST"] rather than
Ordinal.names["WEST"].
> @property
> def values(cls):
> return {v.value: v for k, v in cls.__members__.items()}
Again, I don't see the use case; if you want to convert an int to your
`Ordinal`, just use the constructor
Ordinal(some_int)
> class Ordinal(IntEnum, metaclass=EnhancedIntEnum):
> NORTH = 0
> SOUTH = 1
> EAST = 2
> WEST = 3
>
> print(Ordinal.names)
> print(Ordinal.values)
>
> Thank you
> Eren
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