Najprostszy plik FastAPI może wyglądać tak:

{* ../../docs_src/first_steps/tutorial001.py *}

Skopiuj to do pliku `main.py`.

Uruchom serwer:

<div class="termy">

```console
$ uvicorn main:app --reload

<span style="color: green;">INFO</span>:     Uvicorn running on http://127.0.0.1:8000 (Press CTRL+C to quit)
<span style="color: green;">INFO</span>:     Started reloader process [28720]

     * @throws IOException if any
     * @throws XmlPullParserException if any
     */
    Settings buildSettings() throws IOException, XmlPullParserException;

    /**
     * @param useCachedSettings if true, doesn't reload the user settings
     * @return a <code>Settings</code> object from the user settings file.
     * @throws IOException if any
     * @throws XmlPullParserException if any
     */

}

// LoadUser - reloads a specific user from backend disks or etcd.
func (sys *IAMSys) LoadUser(ctx context.Context, objAPI ObjectLayer, accessKey string, userType IAMUserType) error {
	if !sys.Initialized() {
		return errServerNotInitialized
	}

	return sys.store.UserNotificationHandler(ctx, accessKey, userType)
}

// LoadServiceAccount - reloads a specific service account from backend disks or etcd.

`fastapi dev` 명령을 실행하면 개발 모드가 시작됩니다.

기본적으로 **자동 재시작(auto-reload)** 기능이 활성화되어, 코드에 변경이 생기면 서버를 자동으로 다시 시작합니다. 하지만 이 기능은 리소스를 많이 사용하며, 비활성화했을 때보다 안정성이 떨어질 수 있습니다. 따라서 개발 환경에서만 사용하는 것이 좋습니다. 또한, 서버는 컴퓨터가 자체적으로 통신할 수 있는 IP 주소(`localhost`)인 `127.0.0.1`에서 연결을 대기합니다.

## `fastapi run`

`fastapi run` 명령을 실행하면 기본적으로 프로덕션 모드로 FastAPI가 시작됩니다.

{* ../../docs_src/custom_docs_ui/tutorial001.py hl[36:38] *}

### Test it

Now, you should be able to go to your docs at <a href="http://127.0.0.1:8000/docs" class="external-link" target="_blank">http://127.0.0.1:8000/docs</a>, and reload the page, it will load those assets from the new CDN.

## Self-hosting JavaScript and CSS for docs

import java.util.List;

/**
 * MetadataGraph node - as it's a directed graph - holds adjacency lists for incident and exident nodes
 *
 *
 */
@Deprecated
public class MetadataGraphNode {
    /** node payload */
    MavenArtifactMetadata metadata;

    /** nodes, incident to this (depend on me) */
    List<MetadataGraphNode> inNodes;

    /** nodes, exident to this (I depend on) */
    List<MetadataGraphNode> exNodes;

    this.fixLayoutHeight()\n    })\n\n    setTimeout(() => {\n      $('body.hold-transition').removeClass('hold-transition')\n    }, 50)\n\n    setTimeout(() => {\n      const $preloader = $(SELECTOR_PRELOADER)\n      if ($preloader) {\n        $preloader.css('height', 0)\n        setTimeout(() => {\n          $preloader.children().hide()\n        }, 200)\n      }\n    }, this._config.preloadDuration)\n  }\n\n  _max(numbers) {\n    // Calculate the maximum number in a list\n    let max = 0\n\n  ...

By default, `fastapi dev` will start with auto-reload enabled for local development.

You can read more about it in the <a href="https://fastapi.tiangolo.com/fastapi-cli/" target="_blank">FastAPI CLI docs</a>.

</details>

### Check it

unction(){e.fixLayoutHeight("control_sidebar")})),n.default(window).resize((function(){e.fixLayoutHeight()})),setTimeout((function(){n.default("body.hold-transition").removeClass("hold-transition")}),50),setTimeout((function(){var e=n.default(".preloader");e&&(e.css("height",0),setTimeout((function(){e.children().hide()}),200))}),this._config.preloadDuration)},t._max=function(e){var t=0;return Object.keys(e).forEach((function(a){e[a]>t&&(t=e[a])})),t},t._isFooterFixed=function(){return"fixed"===...

* 📝 Update admonitions in docs missing. PR [#11998](https://github.com/fastapi/fastapi/pull/11998) by [@tiangolo](https://github.com/tiangolo).
* 🔨 Update docs.py script to enable dirty reload conditionally. PR [#11986](https://github.com/fastapi/fastapi/pull/11986) by [@tiangolo](https://github.com/tiangolo).