首先，毫无疑问地，你可以随意地混合使用 `Path`、`Query` 和请求体参数声明，**FastAPI** 会知道该如何处理。

你还可以通过将默认值设置为 `None` 来将请求体参数声明为可选参数：

=== "Python 3.10+"

    ```Python hl_lines="18-20"
    {!> ../../../docs_src/body_multiple_params/tutorial001_an_py310.py!}
    ```

=== "Python 3.9+"

    ```Python hl_lines="18-20"
    {!> ../../../docs_src/body_multiple_params/tutorial001_an_py39.py!}
    ```

=== "Python 3.8+"

    ```Python hl_lines="19-21"

    {!> ../../../docs_src/body_nested_models/tutorial004_py310.py!}
    ```

=== "Python 3.9+"

    ```Python hl_lines="20"
    {!> ../../../docs_src/body_nested_models/tutorial004_py39.py!}
    ```

=== "Python 3.8+"

    ```Python hl_lines="20"
    {!> ../../../docs_src/body_nested_models/tutorial004.py!}
    ```

This would mean that **FastAPI** would expect a body similar to:

---

## **Typer**, FastAPI aplikacji konsolowych

<a href="https://typer.tiangolo.com" target="_blank"><img src="https://typer.tiangolo.com/img/logo-margin/logo-margin-vector.svg" style="width: 20%;"></a>

---

## **Typer**, интерфейс командной строки для FastAPI

<a href="https://typer.tiangolo.com" target="_blank"><img src="https://typer.tiangolo.com/img/logo-margin/logo-margin-vector.svg" style="width: 20%;"></a>

---

## **Typer**, la FastAPI delle CLI

<a href="https://typer.tiangolo.com" target="_blank"><img src="https://typer.tiangolo.com/img/logo-margin/logo-margin-vector.svg" style="width: 20%;"></a>

```Python hl_lines="1  4  7-9"
{!../../../docs_src/extending_openapi/tutorial001.py!}
```

### 生成 OpenAPI 概图

然后，在 `custom_openapi()` 函数里使用 `get_openapi()` 工具函数生成 OpenAPI 概图：

```Python hl_lines="2  15-20"
{!../../../docs_src/extending_openapi/tutorial001.py!}
```

### 修改 OpenAPI 概图

添加 ReDoc 扩展信息，为 OpenAPI 概图里的  `info` **对象**添加自定义 `x-logo`：

```Python hl_lines="21-23"

{% if people %}
<div class="user-list user-list-center">
{% for user in people.one_year_experts[:20] %}

---

## **Typer**，命令行中的 FastAPI

<a href="https://typer.tiangolo.com" target="_blank"><img src="https://typer.tiangolo.com/img/logo-margin/logo-margin-vector.svg" style="width: 20%;"></a>

如果你正在开发一个在终端中运行的<abbr title="Command Line Interface">命令行</abbr>应用而不是 web API，不妨试下 <a href="https://typer.tiangolo.com/" class="external-link" target="_blank">**Typer**</a>。

```

#### *Enum-Wert* erhalten

Den tatsächlichen Wert (in diesem Fall ein `str`) erhalten Sie via `model_name.value`, oder generell, `ihr_enum_member.value`:

```Python hl_lines="20"
{!../../../docs_src/path_params/tutorial005.py!}
```

!!! tip "Tipp"
    Sie können den Wert `"lenet"` außerdem mittels `ModelName.lenet.value` abrufen.

#### *Enum-Member* zurückgeben

Так же, как и раньше, вы можете использовать `File()` для задания дополнительных параметров, даже для `UploadFile`:

=== "Python 3.9+"

    ```Python hl_lines="11  18-20"
    {!> ../../../docs_src/request_files/tutorial003_an_py39.py!}
    ```

=== "Python 3.6+"

    ```Python hl_lines="12  19-21"
    {!> ../../../docs_src/request_files/tutorial003_an.py!}
    ```