os-path-basename (PTH119)

Derived from the flake8-use-pathlib linter.

Fix is sometimes available.

What it does

Checks for uses of os.path.basename.

Why is this bad?

pathlib offers a high-level API for path manipulation, as compared to the lower-level API offered by os.path. When possible, using Path object methods such as Path.name can improve readability over the os.path module's counterparts (e.g., os.path.basename()).

Examples

import os

os.path.basename(__file__)

Use instead:

from pathlib import Path

Path(__file__).name

Known issues

While using pathlib can improve the readability and type safety of your code, it can be less performant than the lower-level alternatives that work directly with strings, especially on older versions of Python.

Fix Safety

This rule's fix is marked as unsafe if the replacement would remove comments attached to the original expression.

References

• Python documentation: PurePath.name
• Python documentation: os.path.basename
• PEP 428 – The pathlib module – object-oriented filesystem paths
• Correspondence between os and pathlib
• Why you should be using pathlib
• No really, pathlib is great