![Swagger UI](https://fastapi.tiangolo.com/img/index/index-01-swagger-ui-simple.png)

### Alternative API docs { #alternative-api-docs }

And now, go to [http://127.0.0.1:8000/redoc](http://127.0.0.1:8000/redoc).

You will see the alternative automatic documentation (provided by [ReDoc](https://github.com/Rebilly/ReDoc)):

![ReDoc](https://fastapi.tiangolo.com/img/index/index-02-redoc-simple.png)

![Swagger UI](https://fastapi.tiangolo.com/img/index/index-01-swagger-ui-simple.png)

### Alternative API-Dokumentation { #alternative-api-docs }

Gehen Sie nun auf [http://127.0.0.1:8000/redoc](http://127.0.0.1:8000/redoc).

Dort sehen Sie die alternative, automatische Dokumentation (bereitgestellt durch [ReDoc](https://github.com/Rebilly/ReDoc)):

![ReDoc](https://fastapi.tiangolo.com/img/index/index-02-redoc-simple.png)

{* ../../docs_src/stream_data/tutorial002_py310.py ln[30:34] hl[31] *}

/// tip

如果你需要在 async 函式內呼叫阻塞程式碼，或在阻塞函式中呼叫 async 函式，你可以使用 [Asyncer](https://asyncer.tiangolo.com)，它是 FastAPI 的姊妹函式庫。

///

### `yield from` { #yield-from }

當你在迭代某個物件（如類檔案物件），並對每個項目使用 `yield` 時，也可以用 `yield from` 直接逐項產出，省略 `for` 迴圈。

這不是 FastAPI 特有的功能，而是 Python 語法；不過這招很實用。 😎

/// tip | Tipp

Wenn Sie blockierenden Code aus einer async-Funktion heraus aufrufen müssen, oder eine async-Funktion aus einer blockierenden Funktion, könnten Sie [Asyncer](https://asyncer.tiangolo.com), eine Schwesterbibliothek zu FastAPI, verwenden.

///

### `yield from` { #yield-from }

## Origine { #origin }

Une origine est la combinaison du protocole (`http`, `https`), du domaine (`myapp.com`, `localhost`, `localhost.tiangolo.com`) et du port (`80`, `443`, `8080`).

Ainsi, toutes celles-ci sont des origines différentes :

* `http://localhost`
* `https://localhost`
* `http://localhost:8080`

## Origem { #origin }

Uma origem é a combinação de protocolo (`http`, `https`), domínio (`myapp.com`, `localhost`, `localhost.tiangolo.com`), e porta (`80`, `443`, `8080`).

Então, todos estes são origens diferentes:

* `http://localhost`
* `https://localhost`
* `http://localhost:8080`

/// tip | Порада

Якщо вам потрібно викликати блокувальний код усередині async-функції або async-функцію зсередини блокувальної функції, ви можете скористатися [Asyncer](https://asyncer.tiangolo.com) - спорідненою бібліотекою до FastAPI.

///

### `yield from` { #yield-from }

![Swagger UI](https://fastapi.tiangolo.com/img/index/index-01-swagger-ui-simple.png)

### 可选的 API 文档 { #alternative-api-docs }

前往 [http://127.0.0.1:8000/redoc](http://127.0.0.1:8000/redoc)。

你将会看到可选的自动生成文档 （由 [ReDoc](https://github.com/Rebilly/ReDoc) 提供）：

![ReDoc](https://fastapi.tiangolo.com/img/index/index-02-redoc-simple.png)

### OpenAPI { #openapi }

## 출처 { #origin }

출처란 프로토콜(`http`, `https`), 도메인(`myapp.com`, `localhost`, `localhost.tiangolo.com`), 그리고 포트(`80`, `443`, `8080`)의 조합을 의미합니다.

따라서, 아래는 모두 상이한 출처입니다:

* `http://localhost`
* `https://localhost`
* `http://localhost:8080`

모두 `localhost`에 있더라도, 서로 다른 프로토콜이나 포트를 사용하므로 서로 다른 "출처"입니다.

/// tip | Dica

Se você precisar chamar código bloqueante de dentro de uma função assíncrona ou uma função assíncrona de dentro de uma função bloqueante, você poderia usar o [Asyncer](https://asyncer.tiangolo.com), uma biblioteca irmã do FastAPI.

///

### `yield from` { #yield-from }