From this answer I learned how to create an enum with attributes (i.e. additional data):

from typing import NamedTuple

class EnumAttr(NamedTuple):
  data: str


class EnumWithAttrs(EnumAttr, Enum):
    GREEN = EnumAttr(data="hello")
    BLUE = EnumAttr(data="world")

EnumWithAttrs.GREEN.data

"hello"

I would now to do the following:

EnumWithAttrs.BLUE(data="yellow").data

'yellow'

Put differently: I want to be able to do the following:

a = EnumWithAttrs.BLUE(data="yellow")
b = EnumWithAttrs.BLUE(data="red")

I tried the following, but it does not work:

from enum import Enum
from typing import Any, Callable, NamedTuple, Self

class EnumAttr(NamedTuple):
  data: str = ""

class EnumWithAttrs(EnumAttr, Enum):
    GREEN = EnumAttr(data="hello")
    BLUE = EnumAttr()

    def with_data(self, s: str) -> Self:
       self._replace(data=s)
       return self

x = EnumWithAttrs.BLUE.with_data("world")
x.data

''