github-social-preview.svg...

github-social-preview.png...

plugins:
  social:
    cards_layout_dir: ../en/layouts
    cards_layout: custom
    cards_layout_options:
      logo: ../en/docs/img/icon-white.svg

  pymdownx.tabbed:
    alternate_style: true
  pymdownx.tilde: null
  attr_list: null
  md_in_html: null
extra:
  analytics:
    provider: google
    property: G-YNEVN69SC3
  social:
  - icon: fontawesome/brands/github-alt
    link: https://github.com/tiangolo/fastapi
  - icon: fontawesome/brands/discord
    link: https://discord.gg/VQjSZaeJmf
  - icon: fontawesome/brands/twitter

👑 ❔ ⏮️ 🏒 &amp; FastAPI 👈 🏒 ⚓️ 🙇 🔛 <a href="https://docs.python.org/3/library/threading.html#thread-local-data" class="external-link" target="_blank">🐍 `threading.local`</a>, &amp; ⚫️ 🚫 ✔️ 🎯 🌌 🔐 ⚫️ ⚖️ ➡️ 👆 🍵 🔗/🎉 🔗 (🔨 🇸🇲 🔰).

&amp; `threading.local` 🚫 🔗 ⏮️ 🆕 🔁 ⚒ 🏛 🐍.

!!! note "📡 ℹ"
    `threading.local` ⚙️ ✔️ "🎱" 🔢 👈 ✔️ 🎏 💲 🔠 🧵.

    👉 ⚠ 🗝 🛠️ 🏗 ✔️ 1️⃣ 👁 🧵 📍 📨, 🙅‍♂ 🌖, 🙅‍♂ 🌘.

        code = list(lang_dict.keys())[0]
        url = lang_dict[code]
        if code not in local_language_names:
            print(
                f"Missing language name for: {code}, "
                "update it in docs/language_names.yml"
            )
            raise typer.Abort()
        use_name = f"{code} - {local_language_names[code]}"
        new_alternate.append({"link": url, "name": use_name})

```Python hl_lines="2"
{!../../../docs_src/python_types/tutorial004.py!}
```

## Tipos de declaração

Você acabou de ver o local principal para declarar type hints. Como parâmetros de função.

Este também é o principal local em que você os usaria com o **FastAPI**.

### Tipos simples

Você pode declarar todos os tipos padrão de Python, não apenas `str`.

Você pode usar, por exemplo:

    But remember that when you import `Query`, `Path`, `Header`, and others from `fastapi`, those are actually functions that return special classes.

!!! info
    To declare headers, you need to use `Header`, because otherwise the parameters would be interpreted as query parameters.

## Automatic conversion

このイメージは、主に上記で説明した状況で役に立つでしょう： [複数のプロセスと特殊なケースを持つコンテナ（Containers with Multiple Processes and Special Cases）](#containers-with-multiple-processes-and-special-cases)

* <a href="https://github.com/tiangolo/uvicorn-gunicorn-fastapi-docker" class="external-link" target="_blank">tiangolo/uvicorn-gunicorn-fastapi</a>.

!!! warning

## Self-hosting JavaScript and CSS for docs

Self-hosting the JavaScript and CSS could be useful if, for example, you need your app to keep working even while offline, without open Internet access, or in a local network.

Here you'll see how to serve those files yourself, in the same FastAPI app, and configure the docs to use them.

### Project file structure

Let's say your project file structure looks like this:

```