pytest.param("tutorial002_py310", marks=[needs_py310, needs_pydanticv2]),
        pytest.param("tutorial002_an", marks=needs_pydanticv2),
        pytest.param("tutorial002_an_py39", marks=[needs_py39, needs_pydanticv2]),
        pytest.param("tutorial002_an_py310", marks=[needs_py310, needs_pydanticv2]),
        pytest.param("tutorial002_pv1", marks=[needs_pydanticv1, needs_pydanticv1]),

//// tab | Python 3.10+

In Python 3.9 oder darüber, ist `Annotated` Teil der Standardbibliothek, also können Sie es von `typing` importieren.

```Python hl_lines="1  3"
{!> ../../docs_src/query_params_str_validations/tutorial002_an_py310.py!}
```

////

//// tab | Python 3.8+

In Versionen unter Python 3.9 importieren Sie `Annotated` von `typing_extensions`.

Es wird bereits mit FastAPI installiert sein.

from fastapi.testclient import TestClient
from fastapi.websockets import WebSocketDisconnect

from ...utils import needs_py310


@pytest.fixture(name="app")
def get_app():
    from docs_src.websockets.tutorial002_an_py310 import app

    return app


@needs_py310
def test_main(app: FastAPI):
    client = TestClient(app)
    response = client.get("/")
    assert response.status_code == 200, response.text

        pytest.param("tutorial002_py310", marks=[needs_py310, needs_pydanticv2]),
        pytest.param("tutorial002_an", marks=needs_pydanticv2),
        pytest.param("tutorial002_an_py39", marks=[needs_py39, needs_pydanticv2]),
        pytest.param("tutorial002_an_py310", marks=[needs_py310, needs_pydanticv2]),
        pytest.param("tutorial002_pv1", marks=[needs_pydanticv1, needs_pydanticv1]),

//// tab | Python 3.10+

```Python hl_lines="13  15  22  25"
{!> ../../docs_src/background_tasks/tutorial002_an_py310.py!}
```

////

//// tab | Python 3.9+

```Python hl_lines="13  15  22  25"
{!> ../../docs_src/background_tasks/tutorial002_an_py39.py!}
```

////

//// tab | Python 3.8+

```Python hl_lines="14  16  23  26"

//// tab | Python 3.10+

```Python hl_lines="13  15  22  25"
{!> ../../docs_src/background_tasks/tutorial002_an_py310.py!}
```

////

//// tab | Python 3.9+

```Python hl_lines="13  15  22  25"
{!> ../../docs_src/background_tasks/tutorial002_an_py39.py!}
```

////

//// tab | Python 3.8+

```Python hl_lines="14  16  23  26"

//// tab | Python 3.10+

```Python hl_lines="68-69  82"
{!> ../../docs_src/websockets/tutorial002_an_py310.py!}
```

////

//// tab | Python 3.9+

```Python hl_lines="68-69  82"
{!> ../../docs_src/websockets/tutorial002_an_py39.py!}
```

////

//// tab | Python 3.8+

```Python hl_lines="69-70  83"

//// tab | Python 3.10+

```Python hl_lines="68-69  82"
{!> ../../docs_src/websockets/tutorial002_an_py310.py!}
```

////

//// tab | Python 3.9+

```Python hl_lines="68-69  82"
{!> ../../docs_src/websockets/tutorial002_an_py39.py!}
```

////

//// tab | Python 3.8+

```Python hl_lines="69-70  83"

//// tab | Python 3.10+

```Python hl_lines="13  15  22  25"
{!> ../../docs_src/background_tasks/tutorial002_an_py310.py!}
```

////

//// tab | Python 3.9+

```Python hl_lines="13  15  22  25"
{!> ../../docs_src/background_tasks/tutorial002_an_py39.py!}
```

////

//// tab | Python 3.8+

```Python hl_lines="14  16  23  26"

它们的工作方式与其他 FastAPI 端点/ *路径操作* 相同：

//// tab | Python 3.10+

```Python hl_lines="68-69  82"
{!> ../../docs_src/websockets/tutorial002_an_py310.py!}
```

////

//// tab | Python 3.9+

```Python hl_lines="68-69  82"
{!> ../../docs_src/websockets/tutorial002_an_py39.py!}
```

////

//// tab | Python 3.8+

```Python hl_lines="69-70  83"