*       href="https://bugs.openjdk.java.net/browse/JDK-8202469">JDK-8202469</a>
 * </ul>
 *
 * <p>This annotation is a temporary hack. We will remove it after we're able to adopt the <a
 * href="https://jspecify.dev/">JSpecify</a> nullness annotations and <a
 * href="https://github.com/google/guava/issues/6126#issuecomment-1203145963">tools no longer need
 * it</a>.
 */
@GwtCompatible
@Retention(RUNTIME)

 *       href="https://bugs.openjdk.java.net/browse/JDK-8202469">JDK-8202469</a>
 * </ul>
 *
 * <p>This annotation is a temporary hack. We will remove it after we're able to adopt the <a
 * href="https://jspecify.dev/">JSpecify</a> nullness annotations and <a
 * href="https://github.com/google/guava/issues/6126#issuecomment-1203145963">tools no longer need
 * it</a>.
 */
@GwtCompatible
@Retention(RUNTIME)

💡 🌖 🔃 <a href="https://docs.pydantic.dev/" class="external-link" target="_blank">Pydantic, ✅ 🚮 🩺</a>.

///

**FastAPI** 🌐 ⚓️ 🔛 Pydantic.

👆 🔜 👀 📚 🌅 🌐 👉 💡 [🔰 - 👩‍💻 🦮](tutorial/index.md){.internal-link target=_blank}.

/// tip

* <a href="https://www.linkedin.com/in/tiangolo/" class="external-link" target="_blank">**Linkedin** でつながる</a>。
    * 新たなツールの発表やリリースが聞けます (ただしTwitterの方が利用頻度が高いですが 🤷‍♂)。
* <a href="https://dev.to/tiangolo" class="external-link" target="_blank">**Dev.to**</a> や <a href="https://medium.com/@tiangolo" class="external-link" target="_blank">**Medium**</a> で著作物を読む (またはフォロー)。
    * アイデアや作成ツールについての記事が読めます。
    * 新規記事の執筆を通知してくれます。

## **FastAPI** に関するツイート

    * Saber quando eu fizer novos anúncios ou novas ferramentas (apesar de que uso o twitter com mais frequência 🤷‍♂).
* Ler meus artigos (ou me seguir) no <a href="https://dev.to/tiangolo" class="external-link" target="_blank">**Dev.to**</a> ou no <a href="https://medium.com/@tiangolo" class="external-link" target="_blank">**Medium**</a>.
    * Ficar por dentro de novas ideias, artigos, e ferramentas criadas por mim.

    * Получать уведомления, когда я делаю объявления и представляю новые инструменты (правда чаще всего я использую Twitter 🤷‍♂).
* Читать, что я пишу (или подписаться на меня) в <a href="https://dev.to/tiangolo" class="external-link" target="_blank">**Dev.to**</a> или в <a href="https://medium.com/@tiangolo" class="external-link" target="_blank">**Medium**</a>.
    * Читать другие идеи, статьи и читать об инструментах созданных мной.

```Python hl_lines="11  19"
{!../../docs_src/sub_applications/tutorial001.py!}
```

### Check the automatic API docs

Now, run the `fastapi` command with your file:

<div class="termy">

```console
$ fastapi dev main.py

<span style="color: green;">INFO</span>:     Uvicorn running on http://127.0.0.1:8000 (Press CTRL+C to quit)
```

</div>

👈 ⛓ 👈 🙆 💲 ✍ 🐍 ⚪️➡️ 🌐 🔢 🔜 `str`, & 🙆 🛠️ 🎏 🆎 ⚖️ 🔬 ✔️ 🔨 📟.

## Pydantic `Settings`

👐, Pydantic 🚚 👑 🚙 🍵 👫 ⚒ 👟 ⚪️➡️ 🌐 🔢 ⏮️ <a href="https://docs.pydantic.dev/latest/concepts/pydantic_settings/" class="external-link" target="_blank">Pydantic: ⚒ 🧾</a>.

### ✍ `Settings` 🎚

🗄 `BaseSettings` ⚪️➡️ Pydantic &amp; ✍ 🎧-🎓, 📶 🌅 💖 ⏮️ Pydantic 🏷.

## Pydantic `Settings`

Por sorte, o Pydantic possui uma funcionalidade para lidar com essas configurações vindas de variáveis de ambiente utilizando <a href="https://docs.pydantic.dev/latest/usage/pydantic_settings/" class="external-link" target="_blank">Pydantic: Settings management</a>.

### Instalando `pydantic-settings`

Primeiro, instale o pacote `pydantic-settings`:

<div class="termy">

If you want to block when reading or writing, you must enable it:

```go
	rb := ringbuffer.New(1024).SetBlocking(true)
```

Enabling blocking will cause the ring buffer to behave like a buffered [io.Pipe](https://pkg.go.dev/io#Pipe).

Regular Reads will block until data is available, but not wait for a full buffer. 
Writes will block until there is space available and writes bigger than the buffer will wait for reads to make space.