Bug report

Bug description:

Hello,

The documentationsays:

__init_subclass__(cls, **kwds)
A classmethod that is used to further configure subsequent subclasses. By default, does nothing.

This would be useful for configuring Enum subclasses and enum members, but it doesn't work as I expected. This method is called after the__new__ or__init__ methods are called, which makes it practically useless for Enum classes.

Even if this is expected behavior, there are questions:

1. The documentation does not mention this, or it is written too vaguely (used tofurther configure).
2. This contradicts how this method works in normal classes. It is clear that in normal classes, the__new__ and__init__ methods are called wheninstances are created, and in this respect their behavior also differs from Enum classes. However, the order of__init_subclass__ method calls in Enum classes still does not seem logical.

Here is a minimal example what I mean:

fromenumimportEnumclassFoo(Enum):def__init_subclass__(cls,/,**kwargs):super().__init_subclass__(**kwargs)print('222:',cls)def__init__(self,value):print('111:',value)classBar(Foo):a=1b=2

For this code, we get:

111: 1111: 2222: <enum 'Bar'>

Therefore, I cannot use__init_subclass__ method before the Enum class and its members are configured.

For example, I would like to do something like that:

classFoo(Enum):def__init_subclass__(cls,/,prefix,**kwargs):super().__init_subclass__(**kwargs)cls._prefix=prefixdef__init__(self,value):self._value_=f'{type(self)._prefix}{value}'classBar(Foo,prefix='bar/'):a='a'b='b'print(Bar.a)<Bar.a:'bar/a'>print(Bar.a.value)'bar/a'

I am currently implementing similar logic throughnonmember.

CPython versions tested on:

3.13

Operating systems tested on:

No response