Marshmallow e Webargs fornecem validação, análise e serialização como plug-ins.

Mas a documentação ainda está faltando. Então APISpec foi criado.

APISpec tem plug-ins para muitos frameworks (e tem um plug-in para Starlette também).

O jeito como ele funciona é que você escreve a definição do _schema_ usando formato YAML dentro da _docstring_ de cada função controlando uma rota.

E ele gera _schemas_ OpenAPI.

 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *

// it under the terms of the GNU Affero General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// This program is distributed in the hope that it will be useful
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU Affero General Public License for more details.
//

* Wsparcie dla **WebSocket**.
* <abbr title='Zadania wykonywane w tle, bez zatrzymywania żądań, w tym samym procesie. Po angielsku: In-process background tasks'>Zadania w tle</abbr>.
* Eventy startup i shutdown.
* Klient testowy zbudowany na bazie biblioteki `requests`.
* **CORS**, GZip, pliki statyczne, streamy.
* Obsługa **sesji i ciasteczek**.

 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND,

 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND,

    * Вы также можете <a href="https://x.com/fastapi" class="external-link" target="_blank">подписаться на @fastapi в X (Twitter)</a> (это отдельный аккаунт).
* <a href="https://www.linkedin.com/in/tiangolo/" class="external-link" target="_blank">Подписаться на меня в **Linkedin**</a>.
    * Получать уведомления, когда я делаю объявления и представляю новые инструменты (правда чаще всего я использую X (Twitter) 🤷‍♂).

									<li class="nav-item"><la:link href="/login" styleClass="nav-link" role="button" aria-haspopup="true"
											aria-expanded="false"
										>
											<em class="fa fa-fw fa-sign-in">
											<la:message key="labels.login" />
										</la:link></li>
								</c:when>
							</c:choose>
							<li class="nav-item"><la:link href="/help" styleClass="nav-link help-link">

👆 💪 ✍ 🌐 🔢 🕴 🎯 📋 👼, 👈 🕴 💪 👈 📋, & 🕴 🚮 📐.

👈, ✍ ⚫️ ▶️️ ⏭ 📋 ⚫️, 🔛 🎏 ⏸:

<div class="termy">

```console
// Create an env var MY_NAME in line for this program call
$ MY_NAME="Wade Wilson" python main.py

// Now it can read the environment variable

Hello Wade Wilson from Python

// The env var no longer exists afterwards
$ python main.py

 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND,