///

An environment variable (also known as "**env var**") is a variable that lives **outside** of the Python code, in the **operating system**, and could be read by your Python code (or by other programs as well).

Environment variables could be useful for handling application **settings**, as part of the **installation** of Python, etc.

## Create and Use Env Vars { #create-and-use-env-vars }

          accountId: ${{ secrets.CLOUDFLARE_ACCOUNT_ID }}
          command: pages deploy ./site --project-name=${{ env.PROJECT_NAME }} --branch=${{ env.BRANCH }}
      - name: Deploy Docs Status Error
        if: failure()
        run: uv run ./scripts/deploy_docs_status.py
        env:
          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
          COMMIT_SHA: ${{ github.event.workflow_run.head_sha }}

            starlette-src: starlette-git
      fail-fast: false
    runs-on: ${{ matrix.os }}
    env:
      UV_PYTHON: ${{ matrix.python-version }}
      UV_RESOLUTION: ${{ matrix.uv-resolution }}
      STARLETTE_SRC: ${{ matrix.starlette-src }}
    steps:
      - name: Dump GitHub context
        env:
          GITHUB_CONTEXT: ${{ toJson(github) }}
        run: echo "$GITHUB_CONTEXT"
      - uses: actions/checkout@v6

/// tip | 팁

이를 사용하려면 `pip install python-dotenv`가 필요합니다.

///

### `.env` 파일 { #the-env-file }

다음과 같은 `.env` 파일을 둘 수 있습니다:

```bash
ADMIN_EMAIL="******@****.***"
APP_NAME="ChimichangApp"
```

### `.env`에서 설정 읽기 { #read-settings-from-env }

///

Pydantic は外部ライブラリを使ってこの種のファイルからの読み込みをサポートしています。詳細は [Pydantic Settings: Dotenv (.env) support](https://docs.pydantic.dev/latest/concepts/pydantic_settings/#dotenv-env-support) を参照してください。

/// tip | 豆知識

これを機能させるには、`pip install python-dotenv` が必要です。

///

### `.env` ファイル { #the-env-file }

次のような `.env` ファイルを用意できます:

```bash
ADMIN_EMAIL="******@****.***"
APP_NAME="ChimichangApp"
```

/// tip

For this to work, you need to `pip install python-dotenv`.

///

### The `.env` file { #the-env-file }

You could have a `.env` file with:

```bash
ADMIN_EMAIL="******@****.***"
APP_NAME="ChimichangApp"

        env:
          GIT_CONFIG_PARAMETERS: "'checkout.workers=12' 'core.featureManyFiles=true'"
        with:
          ref: ${{ github.sha }}
          persist-credentials: false
          fetch-depth: 1

      - name: Build and test
        env:
          TFCI: ${{ inputs.tfci }}
          TFCI_GITHUB_ACTIONS: true

ENV BAZEL_LLVM "C:\tools\LLVM"

# These variables may be useful, but so far haven't been. Keeping for posterity.
# ENV CLANG_COMPILER_PATH "C:\tools\llvm\bin\clang.exe"
# ENV CC "C:\tools\llvm\bin\clang.exe"
# ENV BAZEL_COMPILER "C:\tools\llvm\bin\clang.exe"

ENV BAZEL_SH "C:\tools\msys64\usr\bin\bash.exe"
ENV BAZEL_VS "C:\Program Files\Microsoft Visual Studio\2022\BuildTools"

/// tip

要讓這個功能運作，你需要 `pip install python-dotenv`。

///

### `.env` 檔 { #the-env-file }

你可以有一個 `.env` 檔如下：

```bash
ADMIN_EMAIL="******@****.***"
APP_NAME="ChimichangApp"
```

### 從 `.env` 讀取設定 { #read-settings-from-env }

然後更新你的 `config.py`：

{* ../../docs_src/settings/app03_an_py310/config.py hl[9] *}

/// tip

        with:
          limit-access-to-actor: true
        env:
          GITHUB_TOKEN: ${{ secrets.FASTAPI_TRANSLATIONS }}
          OPENAI_API_KEY: ${{ secrets.OPENAI_API_KEY }}
      - name: FastAPI Translate
        run: |
          uv run ./scripts/translate.py ${{ matrix.command }}
          uv run ./scripts/translate.py make-pr
        env:
          GITHUB_TOKEN: ${{ secrets.FASTAPI_TRANSLATIONS }}