[issue45117] `dict` not subscriptable despite using `__future__` typing annotations

[Dennis Sweeney]

Dennis Sweeney <sweeney.dennis650 at gmail.com> added the comment:

Hi Stefan,

`from __future__ import annotations` only affects annotations -- just the things after the colon. It makes it so that annotations are never evaluated, so things like this work:

    >>> from __future__ import annotations
    >>> x: nonsense()()()()[other_nonsense](1<2>3)

The __future__ import is not a wholesale opt-in-to-all-new-typing-features, it's just an opt-in-to-not-evaluate-annotations.

dict.__class_getitem__ (which is what gets called when you type dict[str, Any]) was not added at all until Python 3.9 (GH-18239), so if you want to *evaluate* such expressions, you have to upgrade to 3.9+. In 3.8, use typing.Dict instead -- 3.8 is no longer accepting new features.

Thanks for the report, but I'm closing this for now.

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nosy: +Dennis Sweeney
resolution:  -> not a bug
stage:  -> resolved
status: open -> closed

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