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Linter (flake8, pylint, custom CLI) for finding usage of deprecated functions.

Project description

flake8-warnings

Python linter that warns you about using deprecated modules, classes, and functions. It provides a CLI as well as flake8 and pylint plugins.

Usage

Installation:

python3 -m pip install flake8-warnings

Now, you can use it in one of the following ways:

  1. Directly from CLI: python3 -m flake8_warnings ./my_project/
  2. As a flake8 plugin. Just run flake8 ./my_project/, it will automatically detect the plugin.
  3. As a pylint plugin. For pylint, plugins must be explicitly specified: pylint --load-plugins=flake8_warnings ./my_project/.

How it works

It analyzes all imported modules, classes and functions and detects the following:

  1. warnings.warn function calls.
  2. Deprecation decorators like deprecated or deprecation.
  3. Deprecation messages in docstrings.
  4. Stdlib modules deprecated by PEP 594.

Error codes

The tool provides a different error code for each warning category:

  • 01: Warning
  • 02: UserWarning
  • 03: DeprecationWarning
  • 04: SyntaxWarning
  • 05: RuntimeWarning
  • 06: FutureWarning
  • 07: PendingDeprecationWarning
  • 08: ImportWarning
  • 09: UnicodeWarning
  • 10: BytesWarning
  • 11: ResourceWarning

This is how they are used in different linters:

  • In flake8, the code prefix is WS0, so DeprecationWarning will be reported as WS003.
  • In pylint, the prefix is W99, so DeprecationWarning will be reported as W9903. The "message-symbol" is the warning category. So, if you want to ignore an error about DeprecationWarning, add # pylint: disable=DeprecationWarning to this line.
  • If you use CLI, the warning category will be shown you directly, without any obscure codes.

In all cases, the error message is the detected warning message.

License

  1. flake8-wranings is licensed under MIT License. On practice, I don't care how you're going to use it. i did the project because it is fun, not because I want to be famous or whatever.
  2. astroid is a direct runtime dependency of flake8-warning and it is licensed under LGPL-2.1 License. It allows commercial and private usage, distribution and whatever, don't confuse it with GPL. However, if your legal department is still nervous, just don't make flake8-warnings a production dependency (why would you?), use it only on dev and test environments.

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