O FastAPI possui suporte para dependências que realizam <abbr title='também chamados de "código de saída", "código de cleanup", "código de teardown", "código de finalização", "código de saída para gerenciador de contextos", etc.'>alguns passos extras ao finalizar</abbr>.

Para fazer isso, utilize `yield` em vez de `return`, e escreva os passos extras (código) depois.

/// tip | "Dica"

Garanta que `yield` é utilizado apenas uma vez.

///

![ReDoc](https://fastapi.tiangolo.com/img/index/index-06-redoc-02.png)

### Recap

In summary, you declare **once** the types of parameters, body, etc. as function parameters.

You do that with standard modern Python types.

You don't have to learn a new syntax, the methods or classes of a specific library, etc.

Just standard **Python**.

For example, for an `int`:

```Python
item_id: int
```

    //    freely. (A event on one thread, B event on another could yield any of
    //    [a1, a2, a3, b1, b2], [a1, b2, a2, a3, b2], [a1, b2, b3, a2, a3], etc.)
    // 2. It's possible for subscribers to actually be dispatched to in a different order than they
    //    were added to the queue. It's easily possible for one thread to take the head of the

    SID getSID ();


    /**
     * Returns the access mask associated with this ACE. Use the
     * constants for <tt>FILE_READ_DATA</tt>, <tt>FILE_WRITE_DATA</tt>,
     * <tt>READ_CONTROL</tt>, <tt>GENERIC_ALL</tt>, etc with bitwise
     * operators to determine which bits of the mask are on or off.
     * 
     * @return the access mask
     */
    int getAccessMask ();


    /**

* It uses a "spooled" file:
    * A file stored in memory up to a maximum size limit, and after passing this limit it will be stored in disk.
* This means that it will work well for large files like images, videos, large binaries, etc. without consuming all the memory.
* You can get metadata from the uploaded file.
* It has a <a href="https://docs.python.org/3/glossary.html#term-file-like-object" class="external-link" target="_blank">file-like</a> `async` interface.

  // Guarded by this.
  private lateinit var publicSuffixListBytes: ByteArray
  private lateinit var publicSuffixExceptionListBytes: ByteArray

  /**
   * Returns the effective top-level domain plus one (eTLD+1) by referencing the public suffix list.
   * Returns null if the domain is a public suffix or a private address.
   *
   * Here are some examples:
   *
   * ```java

   *     message is formed by replacing each {@code %s} placeholder in the template with an
   *     argument. These are matched by position - the first {@code %s} gets {@code
   *     errorMessageArgs[0]}, etc. Unmatched arguments will be appended to the formatted message in
   *     square braces. Unmatched placeholders will be left as-is.
   * @param errorMessageArgs the arguments to be substituted into the message template. Arguments

    @Nullable
    String getClassifier();

    /**
     * Specifies if the artifact already embeds its own dependencies.
     * This is the case for JEE packages or similar artifacts such as
     * WARs, EARs, etc.
     *
     * @return if the artifact's dependencies are included in the artifact
     */
    boolean isIncludesDependencies();

    /**

    * <a href="https://fastapi.tiangolo.com/features/" class="external-link" target="_blank">**Muitos outros recursos**</a> incluindo validação automática, serialização, documentação interativa, autenticação com _tokens_ OAuth2 JWT etc.
* **Senha segura** _hashing_ por padrão.
* Autenticação **Token JWT**.
* Modelos **SQLAlchemy** (independente de extensões Flask, para que eles possam ser usados com _workers_ Celery diretamente).

I love to hear about how **FastAPI** is being used, what you have liked in it, in which project/company are you using it, etc.

## Vote for FastAPI

* <a href="https://www.slant.co/options/34241/~fastapi-review" class="external-link" target="_blank">Vote for **FastAPI** in Slant</a>.