undocumented-warn (LOG009)

Derived from the flake8-logging linter.

Fix is sometimes available.

What it does

Checks for uses of logging.WARN.

Why is this bad?

The logging.WARN constant is an undocumented alias for logging.WARNING.

Although it’s not explicitly deprecated, logging.WARN is not mentioned in the logging documentation. Prefer logging.WARNING instead.

Example

import logging


logging.basicConfig(level=logging.WARN)

Use instead:

import logging


logging.basicConfig(level=logging.WARNING)