unnecessary-literal-union (PYI030)

Derived from the flake8-pyi linter.

Fix is sometimes available.

What it does

Checks for the presence of multiple literal types in a union.

Why is this bad?

Literal["foo", 42] has identical semantics to Literal["foo"] | Literal[42], but is clearer and more concise.

Example

from typing import Literal

field: Literal[1] | Literal[2] | str

Use instead:

from typing import Literal

field: Literal[1, 2] | str

References

• Python documentation: typing.Literal