* Para requisições `PUT` para `/items/{item_id}`, lerá o corpo como JSON e:
    * Verifica que tem um atributo obrigatório `name` que deve ser `str`.
    * Verifica que tem um atributo obrigatório `price` que deve ser `float`.
    * Verifica que tem an atributo opcional `is_offer`, que deve ser `bool`, se presente.
    * Tudo isso também funciona para objetos JSON profundamente aninhados.
* Converter de e para JSON automaticamente.

g ******@****.*** http://mail-archives.apache.org/mod_mbox/maven-users Maven Developer List dev******@****.*** dev******@****.*** dev@maven.apache.org http://mail-archives.apache.org/mod_mbox/maven-dev Maven Commits List ******@****.*** ******@****.*** ******@****.*** http://mail-archives.apache.org/mod_mbox/maven-dev Apache Announce List ******@****.*** ******@****.*** ******@****.***...

    </mailingList>
    <mailingList>
      <name>Maven Developer List</name>
      <subscribe>dev******@****.***</subscribe>
      <unsubscribe>dev******@****.***</unsubscribe>
      <post>dev@maven.apache.org</post>
      <archive>http://mail-archives.apache.org/mod_mbox/maven-dev</archive>
    </mailingList>
    <mailingList>
      <name>Maven Commits List</name>

```

</div>

<details markdown="1">
<summary>About the command <code>fastapi dev main.py</code>...</summary>

The command `fastapi dev` reads your `main.py` file, detects the **FastAPI** app in it, and starts a server using <a href="https://www.uvicorn.org" class="external-link" target="_blank">Uvicorn</a>.

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

To run your FastAPI app for development, you can use the `fastapi dev` command:

<div class="termy">

```console
$ <font color="#4E9A06">fastapi</font> dev <u style="text-decoration-style:single">main.py</u>
<font color="#3465A4">INFO    </font> Using path <font color="#3465A4">main.py</font>

```

</div>

<details markdown="1">
<summary>About the command <code>fastapi dev main.py</code>...</summary>

The command `fastapi dev` reads your `main.py` file, detects the **FastAPI** app in it, and starts a server using <a href="https://www.uvicorn.org" class="external-link" target="_blank">Uvicorn</a>.

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

    <option name="additionalArguments" value="-version -Xallow-kotlin-package -Xskip-metadata-version-check" />
  </component>
  <component name="KotlinJpsPluginSettings">
    <option name="version" value="2.0.20-dev-2651" />
  </component>

    non-Linux environments. For the Android flavor, our unit tests also run on
    API level 21 (Lollipop).

[guava-snapshot-api-docs]: https://guava.dev/releases/snapshot-jre/api/docs/
[guava-snapshot-api-diffs]: https://guava.dev/releases/snapshot-jre/api/diffs/
[Guava Explained]: https://github.com/google/guava/wiki/Home
[Guava Beta Checker]: https://github.com/google/guava-beta-checker

<!-- References -->

    <img src="https://github.com/tiangolo/fastapi/workflows/Test/badge.svg?event=push&branch=master" alt="Test">
</a>
<a href="https://coverage-badge.samuelcolvin.workers.dev/redirect/tiangolo/fastapi" target="_blank">
    <img src="https://coverage-badge.samuelcolvin.workers.dev/tiangolo/fastapi.svg" alt="Coverage">
</a>
<a href="https://pypi.org/project/fastapi" target="_blank">

=== "Pydantic v1"

    ```Python hl_lines="9-10"
    {!> ../../../docs_src/settings/app03_an/config_pv1.py!}
    ```

    !!! tip