=== "Python 3.9+"

    ```Python hl_lines="18-19  26-27"
    {!> ../../../docs_src/dependencies/tutorial008_an_py39.py!}
    ```

=== "Python 3.8+"

    ```Python hl_lines="17-18  25-26"
    {!> ../../../docs_src/dependencies/tutorial008_an.py!}
    ```

=== "Python 3.8+ non-Annotated"

    !!! tip
        如果可能，请尽量使用“ Annotated”版本。

    ```Python hl_lines="16-17  24-25"