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I'm a big fan of `Literal`. I prefer this version over the union version: Literal["fahrenheit", "celsius"] That means the same thing and saves a ton of typing.

I don't think I knew this :P

I used to know a Rodrigo who did know this. :-P *gestures at line 26* github.com/Textualize/t...

I’d recommend an Enum instead :-)

Literals are structural types (enums nominal), they don't require a separate class to define, don't require an import (if they're strings or ints), so I default to literals nowadays.

How do you define a literal with strings or ints without an import?

For strings, yeah! But Literal works in a more general setting… maybe I should add a note to clarify :D

If your options are just some strings, you can, and probably should, use StrEnum from the module enum. For integers, an IntEnum can do. For other types or a union of types, you’ll want to use Literal. Aaaand,

You can have multiple values inside Literal, like Literal["celsius", "fahrenheit"]. You don’t need to split them like I did, above. Thanks for folks in the comments!