```

////

//// tab | Python 3.9+

```Python hl_lines="1  4"
{!> ../../docs_src/python_types/tutorial009_py39.py!}
```

////

//// tab | Python 3.9+ Alternative

```Python hl_lines="1  4"
{!> ../../docs_src/python_types/tutorial009b_py39.py!}
```

////

#### `Union` oder `Optional` verwenden? { #using-union-or-optional }

[tool.ruff.lint.per-file-ignores]
"__init__.py" = ["F401"]
"docs_src/dependencies/tutorial007_py39.py" = ["F821"]
"docs_src/dependencies/tutorial008_py39.py" = ["F821"]
"docs_src/dependencies/tutorial009_py39.py" = ["F821"]
"docs_src/dependencies/tutorial010_py39.py" = ["F821"]
"docs_src/custom_response/tutorial007_py39.py" = ["B007"]
"docs_src/dataclasses/tutorial003_py39.py" = ["I001"]

Podrías hacer eso con `openapi_extra`:

{* ../../docs_src/path_operation_advanced_configuration/tutorial006_py39.py hl[19:36, 39:40] *}

Você pode fazer isso com `openapi_extra`:

{* ../../docs_src/path_operation_advanced_configuration/tutorial006_py39.py hl[19:36, 39:40] *}

import importlib

import pytest
from fastapi.testclient import TestClient


@pytest.fixture(
    name="mod_name",
    params=[
        pytest.param("tutorial002_py39"),
        pytest.param("tutorial003_py39"),
        pytest.param("tutorial004_py39"),
    ],
)
def get_mod_name(request: pytest.FixtureRequest) -> str:
    return request.param


@pytest.fixture(name="client")
def get_client(mod_name: str) -> TestClient:

<img src="/img/tutorial/extending-openapi/image02.png">

Но вы можете отключить её, установив `syntaxHighlight` в `False`:

{* ../../docs_src/configure_swagger_ui/tutorial001_py39.py hl[3] *}

…и после этого Swagger UI больше не будет показывать подсветку синтаксиса:

<img src="/img/tutorial/extending-openapi/image03.png">

## Изменить тему { #change-the-theme }

<img src="/img/tutorial/extending-openapi/image02.png">

But you can disable it by setting `syntaxHighlight` to `False`:

{* ../../docs_src/configure_swagger_ui/tutorial001_py39.py hl[3] *}

...and then Swagger UI won't show the syntax highlighting anymore:

<img src="/img/tutorial/extending-openapi/image03.png">

## Change the Theme { #change-the-theme }

Você pode defini-los da seguinte maneira:

{* ../../docs_src/metadata/tutorial001_py39.py hl[3:16, 19:32] *}

/// tip | Dica

Você pode escrever Markdown no campo `description` e ele será renderizado na saída.

///

Com essa configuração, a documentação automática da API se pareceria com:

<img src="/img/tutorial/extending-openapi/image02.png">

Pero puedes desactivarlo estableciendo `syntaxHighlight` en `False`:

{* ../../docs_src/configure_swagger_ui/tutorial001_py39.py hl[3] *}

...y entonces Swagger UI ya no mostrará el resaltado de sintaxis:

<img src="/img/tutorial/extending-openapi/image03.png">

## Cambiar el tema { #change-the-theme }

{* ../../docs_src/path_params/tutorial003_py39.py hl[6,11] *}

Ansonsten würde der Pfad für `/users/{user_id}` auch `/users/me` auswerten, und annehmen, dass ein Parameter `user_id` mit dem Wert `"me"` übergeben wurde.

Sie können eine Pfadoperation auch nicht erneut definieren:

{* ../../docs_src/path_params/tutorial003b_py39.py hl[6,11] *}