依赖项就是一个函数，且可以使用与*路径操作函数*相同的参数：

```Python hl_lines="8-11"
{!../../docs_src/dependencies/tutorial001.py!}
```

大功告成。

只用了**2 行**代码。

依赖项函数的形式和结构与*路径操作函数*一样。

因此，可以把依赖项当作没有「装饰器」（即，没有 `@app.get("/some-path")` ）的路径操作函数。

依赖项可以返回各种内容。

本例中的依赖项预期接收如下参数：

* 类型为 `str` 的可选查询参数 `q`
* 类型为 `int` 的可选查询参数 `skip`，默认值是 `0`
* 类型为 `int` 的可选查询参数 `limit`，默认值是 `100`

然后，依赖项函数返回包含这些值的 `dict`。

### 导入 `Depends`

variables from your model are also going to be untrusted. That means that if
your code interacts with the filesystem, network, etc. and uses checkpointed
variables as part of those interactions (ex: using a string variable to build a
filesystem path), a maliciously created checkpoint might be able to change the
targets of those operations, which could result in arbitrary
read/write/executions.

### Running a TensorFlow server

✍ 📁 🔢 🎏 🌌 👆 🔜 `Body` ⚖️ `Form`:

```Python hl_lines="7"
{!../../docs_src/request_files/tutorial001.py!}
```

/// info

`File` 🎓 👈 😖 🔗 ⚪️➡️ `Form`.

✋️ 💭 👈 🕐❔ 👆 🗄 `Query`, `Path`, `File` & 🎏 ⚪️➡️ `fastapi`, 👈 🤙 🔢 👈 📨 🎁 🎓.

///

/// tip

📣 📁 💪, 👆 💪 ⚙️ `File`, ↩️ ⏪ 🔢 🔜 🔬 🔢 🔢 ⚖️ 💪 (🎻) 🔢.

///

📁 🔜 📂 "📨 💽".

</a>

---

Istio is an open source service mesh that layers transparently onto existing distributed applications. Istio’s powerful features provide a uniform and more efficient way to secure, connect, and monitor services. Istio is the path to load balancing, service-to-service authentication, and monitoring – with few or no service code changes.

- For in-depth information about how to use Istio, visit [istio.io](https://istio.io)

```
.
├── Dockerfile
├── main.py
└── requirements.txt
```

Then you would just have to change the corresponding paths to copy the file inside the `Dockerfile`:

```{ .dockerfile .annotate hl_lines="10  13" }
FROM python:3.9

WORKDIR /code

COPY ./requirements.txt /code/requirements.txt

- Added a new flag `--append-server-path` to `kubectl proxy` that will automatically append the kube context server path to each request. ([#97350](https://github.com/kubernetes/kubernetes/pull/97350), [@FabianKramm](https://github.com/FabianKramm))

* Add path exist check in getPodVolumePathListFromDisk ([#38909](https://github.com/kubernetes/kubernetes/pull/38909), [@jingxu97](https://github.com/jingxu97))
* Begin paths for internationalization in kubectl ([#36802](https://github.com/kubernetes/kubernetes/pull/36802), [@brendandburns](https://github.com/brendandburns))

			}

			ctrlzClient := &ControlzClient{
				baseURL: &url.URL{
					Scheme: "http",
					Host:   portForwarder.Address(),
					Path:   "scopej",
				},
				httpClient: &http.Client{},
			}
			istiodConfigCmd := chooseClientFlag(ctrlzClient, istiodReset, outputLogLevel, stackTraceLevel, outputFormat)

	switch {
	case usersPrefix:
		accessKey := path.Dir(strings.TrimPrefix(event.keyPath, iamConfigUsersPrefix))
		err = sys.store.UserNotificationHandler(ctx, accessKey, regUser)
	case stsPrefix:
		accessKey := path.Dir(strings.TrimPrefix(event.keyPath, iamConfigSTSPrefix))
		err = sys.store.UserNotificationHandler(ctx, accessKey, stsUser)
	case svcPrefix:

Con **FastAPI** declaras los parámetros con type hints y obtienes:

* **Soporte en el editor**.
* **Type checks**.

...y **FastAPI** usa las mismas declaraciones para:

* **Definir requerimientos**: desde request path parameters, query parameters, headers, bodies, dependencies, etc.
* **Convertir datos**: desde el request al tipo requerido.
* **Validar datos**: viniendo de cada request: