Keep `Literal` after indexing?

EDIT: MWE

from typing import Literal

foo = 0
bar: tuple[Literal[1], ...] = (1,)[foo:]  # error: Incompatible types in assignment (expression has type "tuple[int, ...]", variable has type "tuple[Literal[1], ...]")  [assignment]
baz: tuple[Literal[1], ...] = (1,)[0:]    # OK

bar_fix: tuple[Literal[1], ...] = (1,)    # In two steps...
bar_fix = bar_fix[foo:]                   # ...works fine

Original message

Hi there,

As always, I'm not sure whether I should post on mypy or python typing page. The problem I encounter is the following.

aligns: tuple[Literal["center", "right"], ...] = ("center", "right", "center")[no_extra:]

error: Incompatible types in assignment (expression has type "tuple[str, ...]", variable has type "tuple[Literal['center', 'right'], ...]")  [assignment]
            aligns: tuple[Literal["center", "right"], ...] = ("center", "right", "center")[no_extra:]

where no_extra is a bool. Essentially, I either keep or not the first element with my_tuple[no_extra:], and this makes it into a tuple[str, ...].

Is it normal? If so, is there a recommended practice around it, or should this be a new feature?

Thanks in advance!

All the best.
Élie

Comienza reproduciendo el MWE del issue y compara los tipos inferidos para los slices usando un índice variable frente a un índice literal. El cambio está completo cuando el slice con índice variable conserva el tipo de elemento Literal de la tupla sin degradar el comportamiento existente con índices literales.