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PythonにおけるLinterとFormatterのテンプレ

Last updated at Posted at 2023-01-29

プロジェクト毎にLinterやFormatterの設定をするのはめんどくさいので、いつでも使い回せるように、pipを使ってpythonのテンプレートを作っておこうと思います。

ツール

以下のパッケージを使用しています。

  • black
  • isort
  • flake8

設定ファイル

pyproject.toml
[tool.black]
line-length = 88

[tool.isort]
profile = "black"
line_length = 88
.flake8
[flake8]
max-line-length = 88
extend-ignore = E203
.vscode/settings.json
{
  "python.linting.enabled": true,
  "python.linting.pylintEnabled": false,
  "python.linting.flake8Enabled": true,
  "python.linting.lintOnSave": true,
  "python.formatting.provider": "black",
  "python.formatting.blackArgs": [
      "--line-length",
      "88"
  ],
  "editor.formatOnSave": true,
  "editor.codeActionsOnSave": {
      "source.organizeImports": true
  }
}
Makefile
install:
	pip install --upgrade pip
	pip install -r requirements.txt

uninstall:
	pip install --upgrade pip
	pip freeze | xargs pip uninstall -y

freeze:
	pip install --upgrade pip
	pip freeze > requirements.txt

format:
	black src
	isort src

lint:
	flake8 src

使用例

まず、必要なライブラリをインストールします。

zsh
pip install black isort flake8

適宜、FormatterやLinterを実行します。

zsh
make format
# or 
make lint

参考

[1] Pythonのコードフォーマッターについての個人的ベストプラクティス

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