* The alternative documentation will also reflect the new query parameter and body:

![ReDoc](https://fastapi.tiangolo.com/img/index/index-06-redoc-02.png)

### Recap { #recap }

In summary, you declare **once** the types of parameters, body, etc. as function parameters.

You do that with standard modern Python types.

You don't have to learn a new syntax, the methods or classes of a specific library, etc.

<div style="text-align: right; margin-right: 10%;">Timothy Crosley – <strong><a href="https://github.com/hugapi/hug" target="_blank">Hug</a>-Autor</strong> <a href="https://news.ycombinator.com/item?id=19455465" target="_blank"><small>(Ref.)</small></a></div>

---

* The alternative documentation will also reflect the new query parameter and body:

![ReDoc](https://fastapi.tiangolo.com/img/index/index-06-redoc-02.png)

### Recap

In summary, you declare **once** the types of parameters, body, etc. as function parameters.

You do that with standard modern Python types.

You don't have to learn a new syntax, the methods or classes of a specific library, etc.

* 🌐 Add new Spanish translations for all docs with new LLM-assisted system using PydanticAI. PR [#13122](https://github.com/fastapi/fastapi/pull/13122) by [@tiangolo](https://github.com/tiangolo).

    assert isinstance(result, list)


@needs_py310
def test_serialize_sequence_value_with_optional_list_pipe_union():
    """Test that serialize_sequence_value handles optional lists correctly (with new syntax)."""
    from fastapi._compat import v2

    field_info = FieldInfo(annotation=list[str] | None)
    field = v2.ModelField(name="items", field_info=field_info)

        pytest.param("tutorial001_an_py310", marks=needs_py310),
    ],
)
def get_client(request: pytest.FixtureRequest):
    clear_sqlmodel()
    # TODO: remove when updating SQL tutorial to use new lifespan API
    with warnings.catch_warnings(record=True):
        warnings.simplefilter("always")
        mod = importlib.import_module(f"docs_src.sql_databases.{request.param}")
        clear_sqlmodel()

    # Trio 24.1.0 raises a warning from attrs
    # Ref: https://github.com/python-trio/trio/pull/3054
    # Remove once there's a new version of Trio
    'ignore:The `hash` argument is deprecated*:DeprecationWarning:trio',
]

[tool.coverage.run]
parallel = true
data_file = "coverage/.coverage"
source = [
    "docs_src",
    "tests",

        pytest.param("tutorial002_an_py310", marks=needs_py310),
    ],
)
def get_client(request: pytest.FixtureRequest):
    clear_sqlmodel()
    # TODO: remove when updating SQL tutorial to use new lifespan API
    with warnings.catch_warnings(record=True):
        warnings.simplefilter("always")
        mod = importlib.import_module(f"docs_src.sql_databases.{request.param}")
        clear_sqlmodel()

    # For MacOS with Cairo
    os.environ["DYLD_FALLBACK_LIBRARY_PATH"] = "/opt/homebrew/lib"


@app.command()
def new_lang(lang: str = typer.Argument(..., callback=lang_callback)):
    """
    Generate a new docs translation directory for the language LANG.
    """
    new_path: Path = Path("docs") / lang
    if new_path.exists():
        typer.echo(f"The language was already created: {lang}")
        raise typer.Abort()

    branch_name = "translate"
    if language:
        branch_name += f"-{language}"
    if command:
        branch_name += f"-{command}"
    branch_name += f"-{secrets.token_hex(4)}"
    print(f"Creating a new branch {branch_name}")
    subprocess.run(["git", "checkout", "-b", branch_name], check=True)
    print("Adding updated files")
    git_path = Path("docs")
    subprocess.run(["git", "add", str(git_path)], check=True)