* to serve the application
* to serve the page

* the app
* the application

* the request
* the response
* the error response

* the path operation
* the path operation decorator
* the path operation function

* the body
* the request body
* the response body
* the JSON body
* the form body
* the file body
* the function body

* the parameter

    * If you also declare dependencies in a specific *path operation*, **they will be executed too**.
    * The router dependencies are executed first, then the [`dependencies` in the decorator](dependencies/dependencies-in-path-operation-decorators.md){.internal-link target=_blank}, and then the normal parameter dependencies.
    * You can also add [`Security` dependencies with `scopes`](../advanced/security/oauth2-scopes.md){.internal-link target=_blank}.

 * override one or more methods to modify the behavior of the backing map as desired per the <a
 * href="http://en.wikipedia.org/wiki/Decorator_pattern">decorator pattern</a>.
 *
 * <p><b>Warning:</b> The methods of {@code ForwardingNavigableMap} forward <i>indiscriminately</i>
 * to the methods of the delegate. For example, overriding {@link #put} alone <i>will not</i> change

 * override one or more methods to modify the behavior of the backing map as desired per the <a
 * href="http://en.wikipedia.org/wiki/Decorator_pattern">decorator pattern</a>.
 *
 * <p><b>Warning:</b> The methods of {@code ForwardingNavigableMap} forward <i>indiscriminately</i>
 * to the methods of the delegate. For example, overriding {@link #put} alone <i>will not</i> change

{* ../../docs_src/first_steps/tutorial001.py hl[6] *}
`@app.get("/")`は直下の関数が下記のリクエストの処理を担当することを**FastAPI**に伝えます:

* パス `/`
* <abbr title="an HTTP GET method"><code>get</code> オペレーション</abbr>

/// info | `@decorator` について

Pythonにおける`@something`シンタックスはデコレータと呼ばれます。

「デコレータ」は関数の上に置きます。かわいらしい装飾的な帽子のようです（この用語の由来はそこにあると思います）。

「デコレータ」は直下の関数を受け取り、それを使って何かを行います。

 * Takes a rendered release notes HTML file and decorates it with extra elements/content/links.
 */
@CacheableTask
public abstract class DecorateReleaseNotes extends DefaultTask {
    /**
     * The rendered HTML release notes that need decoration.
     */
    @InputFile
    @PathSensitive(PathSensitivity.NONE)
    public abstract RegularFileProperty getHtmlFile();

    /**
     * The decorated HTML file
     */
    @OutputFile

Vous la mettez au dessus d'une fonction. Comme un joli chapeau décoratif (j'imagine que ce terme vient de là 🤷🏻‍♂).

Un "décorateur" prend la fonction en dessous et en fait quelque chose.

Dans notre cas, ce décorateur dit à **FastAPI** que la fonction en dessous correspond au **chemin** `/` avec l'**opération** `get`.

C'est le "**décorateur d'opération de chemin**".

///

Sie können jedoch auch die `Response`, die Sie verwenden möchten (z. B. jede `Response`-Unterklasse), im *Pfadoperation-Dekorator* mit dem `response_class`-Parameter deklarieren.

Der Inhalt, den Sie von Ihrer *Pfadoperation-Funktion* zurückgeben, wird in diese `Response` eingefügt.

# Global Dependencies { #global-dependencies }

For some types of applications you might want to add dependencies to the whole application.

Similar to the way you can [add `dependencies` to the *path operation decorators*](dependencies-in-path-operation-decorators.md){.internal-link target=_blank}, you can add them to the `FastAPI` application.

In that case, they will be applied to all the *path operations* in the application:

* Fix PDB e2e test, off-by-one ([#35274](https://github.com/kubernetes/kubernetes/pull/35274), [@soltysh](https://github.com/soltysh))
* etcd3: API storage - decouple decorator from filter ([#31189](https://github.com/kubernetes/kubernetes/pull/31189), [@hongchaodeng](https://github.com/hongchaodeng))