Error when iterating over annotated Enum

[lgln-kmi]

The annotated Enum is not iterable any more.

Example:

from enum import Enum
from typing import Annotated

class Test( Enum ):
  AAA = 1
  BBB = 2

CONST = 1
TestAnnotated = Annotated[ Test, CONST ]

test = [ t for t in Test ]
print( test )

test_annotated_workaround = [ t for t in TestAnnotated._member_map_.values() ]
print( test_annotated_workaround )

test_annotated = [ t for t in TestAnnotated ]
print( test_annotated )

Output:

[<Test.AAA: 1>, <Test.BBB: 2>]
[<Test.AAA: 1>, <Test.BBB: 2>]
Traceback (most recent call last):
  File "/swa-git/app/src/swa/revisor/sandkasten/annotated_enum.py", line 18, in <module>
    test_annotated = [ t for t in TestAnnotated ]
                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
TypeError: '_AnnotatedAlias' object is not iterable

Is this a bug or intended behaviour? Is there any other workaround possible?

[JelleZijlstra]

That's intentional. Annotated is supposed to be ignored by static type checkers, but it doesn't proxy arbitrary operations to the inner type.