* Plays nicely with your **<abbr title="Integrated Development Environment, similar to a code editor">IDE</abbr>/<abbr title="A program that checks for code errors">linter</abbr>/brain**:
    * Because pydantic data structures are just instances of classes you define; auto-completion, linting, mypy and your intuition should all work properly with your validated data.
* Validate **complex structures**:

    * 阅读我的其它想法、文章，了解我创建的工具
    * 关注我，这样就可以随时看到我发布的新文章

## Tweet about **FastAPI**

<a href="https://twitter.com/compose/tweet?text=I'm loving @fastapi because... https://github.com/tiangolo/fastapi" class="external-link" target="_blank">Tweet about **FastAPI**</a> 让我和大家知道您为什么喜欢 FastAPI。🎉

知道有人使用 **FastAPI**，我会很开心，我也想知道您为什么喜欢 FastAPI，以及您在什么项目/哪些公司使用 FastAPI，等等。

## 为 FastAPI 投票

!!! info
    `Form` is a class that inherits directly from `Body`.

!!! tip
    To declare form bodies, you need to use `Form` explicitly, because without it the parameters would be interpreted as query parameters or body (JSON) parameters.

## About "Form Fields"

    ```

But then we get a `dict` in the parameter `commons` of the *path operation function*.

And we know that editors can't provide a lot of support (like completion) for `dict`s, because they can't know their keys and value types.

We can do better...

## What makes a dependency

Up to now you have seen dependencies declared as functions.

    !!! note
        The `--no-cache-dir` is only related to `pip`, it has nothing to do with Docker or containers.

    The `--upgrade` option tells `pip` to upgrade the packages if they are already installed.

    Because the previous step copying the file could be detected by the **Docker cache**, this step will also **use the Docker cache** when available.

Nope ! C'est ça la morale de l'histoire.

La concurrence est différente du parallélisme. C'est mieux sur des scénarios **spécifiques** qui impliquent beaucoup d'attente. À cause de ça, c'est généralement bien meilleur que le parallélisme pour le développement d'applications web. Mais pas pour tout.

Donc pour équilibrer tout ça, imaginez l'histoire suivante :

            the output should use the alias names (when provided) or the Python
            attribute names. In an API, if you set an alias, it's probably because you
            want to use it in the result, so you probably want to leave this set to
            `True`.
            """
        ),
    ] = True,
    exclude_unset: Annotated[
        bool,
        Doc(

    * Me siga para saber quando eu publicar algo novo.

## Tweete sobre **FastAPI**

<a href="https://twitter.com/compose/tweet?text=I'm loving @fastapi because... https://github.com/tiangolo/fastapi" class="external-link" target="_blank">Tweete sobre o **FastAPI**</a> e compartilhe comigo e com os outros o porque de gostar do FastAPI. 🎉

* If the parameter is declared to be of the type of a **Pydantic model**, it will be interpreted as a request **body**.

!!! note
    FastAPI will know that the value of `q` is not required because of the default value `= None`.

    The `Union` in `Union[str, None]` is not used by FastAPI, but will allow your editor to give you better support and detect errors.

## Without Pydantic

    * ✍ 🎏 💭, 📄, & ✍ 🔃 🧰 👤 ✔️ ✍.
    * ⏩ 👤 ✍ 🕐❔ 👤 ✍ 🕳 🆕.

## 👱📔 🔃 **FastAPI**

<a href="https://twitter.com/compose/tweet?text=I'm loving @fastapi because... https://github.com/tiangolo/fastapi" class="external-link" target="_blank">👱📔 🔃 **FastAPI**</a> &amp; ➡️ 👤 &amp; 🎏 💭 ⚫️❔ 👆 💖 ⚫️. 👶

👤 💌 👂 🔃 ❔ **FastAPI** 💆‍♂ ⚙️, ⚫️❔ 👆 ✔️ 💖 ⚫️, ❔ 🏗/🏢 👆 ⚙️ ⚫️, ♒️.