using them to decorate a function with a single `yield`.

That's what **FastAPI** uses internally for dependencies with `yield`.

But you don't have to use the decorators for FastAPI dependencies (and you shouldn't).

FastAPI will do it for you internally.

from fastapi import FastAPI

app = FastAPI()


@app.get("/items/{item_id}")
async def read_item(item_id: int):

from fastapi import FastAPI

app = FastAPI()


@app.get("/files/{file_path:path}")
async def read_file(file_path: str):

from fastapi import FastAPI

app = FastAPI(docs_url="/documentation", redoc_url=None)


@app.get("/items/")
async def read_items():

# サーバーを手動で実行する { #run-a-server-manually }

## fastapi run コマンドを使う { #use-the-fastapi-run-command }

結論として、FastAPI アプリケーションを提供するには `fastapi run` を使います:

<div class="termy">

```console
$ <font color="#4E9A06">fastapi</font> run <u style="text-decoration-style:solid">main.py</u>

  <span style="background-color:#009485"><font color="#D3D7CF"> FastAPI </font></span>  Starting production server 🚀

from fastapi import FastAPI, status

app = FastAPI()


@app.post("/items/", status_code=status.HTTP_201_CREATED)
async def create_item(name: str):

{* ../../docs_src/websockets_/tutorial001_py310.py hl[2,6:38,41:43] *}

## 建立一個 `websocket` { #create-a-websocket }

在你的 **FastAPI** 應用中，建立一個 `websocket`：

{* ../../docs_src/websockets_/tutorial001_py310.py hl[1,46:47] *}

/// note | 技術細節

你也可以使用 `from starlette.websockets import WebSocket`。

**FastAPI** 直接提供相同的 `WebSocket` 只是為了方便你這位開發者，但它其實是直接來自 Starlette。

///

## 等待與傳送訊息 { #await-for-messages-and-send-messages }

    Read more about it in the
    [FastAPI docs for Dependencies](https://fastapi.tiangolo.com/tutorial/dependencies/).

    **Example**

    ```python
    from typing import Annotated

    from fastapi import Depends, FastAPI

    app = FastAPI()


    async def common_parameters(q: str | None = None, skip: int = 0, limit: int = 100):

///

## FastAPI 스폰서의 SDK 생성기 { #sdk-generators-from-fastapi-sponsors }

이 섹션에서는 FastAPI를 후원하는 회사들이 제공하는 **벤처 투자 기반** 및 **기업 지원** 솔루션을 소개합니다. 이 제품들은 고품질로 생성된 SDK에 더해 **추가 기능**과 **통합**을 제공합니다.

✨ [**FastAPI 후원하기**](../help-fastapi.md#sponsor-the-author) ✨를 통해, 이 회사들은 프레임워크와 그 **생태계**가 건강하고 **지속 가능**하게 유지되도록 돕습니다.

from fastapi import FastAPI

app = FastAPI()


@app.get("/")
async def read_main():