redundant-typehint-argument / R6006

Message emitted:

Type `%s` is used more than once in union type annotation. Remove redundant typehints.

Description:

Duplicated type arguments will be skipped by `mypy` tool, therefore should be removed to avoid confusion.

Problematic code:

from typing import Union

sweet_count: Union[int, str, int] = 42  # [redundant-typehint-argument]

Correct code:

from typing import Union

sweet_count: Union[str, int] = 42

Configuration file:

[main]
load-plugins=pylint.extensions.typing

Note

This message is emitted by the optional 'typing' checker, which requires the pylint.extensions.typing plugin to be loaded.

Created by the typing checker.