On 4/20/21 12:01 PM, Guido van Rossum wrote:
> On Tue, Apr 20, 2021 at 11:12 AM Ethan Furman wrote:
>> Moving forward, I'm not sure having format() and str() ever be different
>> is a good idea, especially since users who need, for example, Color.RED
>> to be '1' can simply add a `__str__ = int.__str__` to their own custom
>> base IntEnum class and be good to go. If we deprecate the current behavior
>> now we could change it in 3.12.
>>
>> Thoughts?
> So to be clear, that one user wants f"{Color.RED}" to return "1" and not
> " Color.RED" (or something like that). And you want f"{Color.RED}" and
> str(Color.RED) to return the same value. Then together that means that
> str(Color.RED) must also return "1".
>
> Did I get that right? And are you happy with that outcome?
Almost right. They should both return `Color.RED`. Any users who want
something different will need to do some work on
their end:
class MyIntEnum(IntEnum):
def __format__ = int.__format__
class Color(MyIntEnum):
RED = 1
format(Color.RED)
# '1'
The deprecation period will give that user, and others like them, time to add
their own Enum base classes with the
`__format__` method they desire.