Auf die gleiche Weise können Sie optionale Query-Parameter deklarieren, indem Sie deren Defaultwert auf `None` setzen:

//// tab | Python 3.10+

```Python hl_lines="7"
{!> ../../docs_src/query_params/tutorial002_py310.py!}
```

////

//// tab | Python 3.8+

```Python hl_lines="9"
{!> ../../docs_src/query_params/tutorial002.py!}
```

////

```Python hl_lines="22"
{!> ../../docs_src/body_multiple_params/tutorial002.py!}
```

////

//// tab | 🐍 3️⃣.1️⃣0️⃣ & 🔛

```Python hl_lines="20"
{!> ../../docs_src/body_multiple_params/tutorial002_py310.py!}
```

////

👉 💼, **FastAPI** 🔜 👀 👈 📤 🌅 🌘 1️⃣ 💪 🔢 🔢 (2️⃣ 🔢 👈 Pydantic 🏷).

, ⚫️ 🔜 ⤴️ ⚙️ 🔢 📛 🔑 (🏑 📛) 💪, & ⌛ 💪 💖:

```JSON
{
    "item": {
        "name": "Foo",

## Return the same input data

Here we are declaring a `UserIn` model, it will contain a plaintext password:

//// tab | Python 3.10+

```Python hl_lines="7  9"
{!> ../../docs_src/response_model/tutorial002_py310.py!}
```

////

//// tab | Python 3.8+

```Python hl_lines="9  11"
{!> ../../docs_src/response_model/tutorial002.py!}
```

////

/// info

```

////

//// tab | Python 3.10+ non-Annotated

/// tip | "Dica"

Utilize a versão com `Annotated` se possível.

///

```Python hl_lines="9-13"
{!> ../../docs_src/dependencies/tutorial002_py310.py!}
```

////

//// tab | Python 3.8+ non-Annotated

/// tip | "Dica"

Utilize a versão com `Annotated` se possível.

///

```Python hl_lines="11-15"

```

////

//// tab | Python 3.10+ non-Annotated

/// tip

Prefer to use the `Annotated` version if possible.

///

```Python hl_lines="9-13"
{!> ../../docs_src/dependencies/tutorial002_py310.py!}
```

////

//// tab | Python 3.8+ non-Annotated

/// tip

Prefer to use the `Annotated` version if possible.

///

```Python hl_lines="11-15"

{!> ../../docs_src/response_model/tutorial003_py310.py!}
```

////

📥, ✋️ 👆 *➡ 🛠️ 🔢* 🛬 🎏 🔢 👩‍💻 👈 🔌 🔐:

//// tab | 🐍 3️⃣.6️⃣ & 🔛

```Python hl_lines="24"
{!> ../../docs_src/response_model/tutorial003.py!}
```

////

//// tab | 🐍 3️⃣.1️⃣0️⃣ & 🔛

```Python hl_lines="24"
{!> ../../docs_src/response_model/tutorial003_py310.py!}
```

////

```

////

//// tab | 🐍 3️⃣.9️⃣ & 🔛

```Python hl_lines="17  22  27"
{!> ../../docs_src/path_operation_configuration/tutorial002_py39.py!}
```

////

//// tab | 🐍 3️⃣.1️⃣0️⃣ & 🔛

```Python hl_lines="15  20  25"
{!> ../../docs_src/path_operation_configuration/tutorial002_py310.py!}
```

////

👫 🔜 🚮 🗄 🔗 & ⚙️ 🏧 🧾 🔢:

<img src="/img/tutorial/path-operation-configuration/image01.png">

//// tab | Python 3.10+ без Annotated

/// tip | "Подсказка"

Предпочтительнее использовать версию с аннотацией, если это возможно.

///

```Python hl_lines="8"
{!> ../../docs_src/header_params/tutorial002_py310.py!}
```

////

//// tab | Python 3.8+ без Annotated

/// tip | "Подсказка"

Предпочтительнее использовать версию с аннотацией, если это возможно.

///

////

//// tab | Python 3.10+ nicht annotiert

/// tip | "Tipp"

Bevorzugen Sie die `Annotated`-Version, falls möglich.

///

```Python hl_lines="8"
{!> ../../docs_src/header_params/tutorial002_py310.py!}
```

////

//// tab | Python 3.8+ nicht annotiert

/// tip | "Tipp"

Bevorzugen Sie die `Annotated`-Version, falls möglich.

///

```Python hl_lines="10"

///

```Python hl_lines="10"
{!> ../../docs_src/query_param_models/tutorial002_py310.py!}
```

////

//// tab | Python 3.9+ non-Annotated

/// tip

Prefer to use the `Annotated` version if possible.

///

```Python hl_lines="9"
{!> ../../docs_src/query_param_models/tutorial002_py39.py!}
```

////

//// tab | Python 3.8+ non-Annotated

/// tip