Todo construido como herramientas y componentes reutilizables que son fáciles de integrar con tus sistemas, almacenes de datos, bases de datos relacionales y NoSQL, etc.

### Inyección de dependencias { #dependency-injection }

            include_in_schema=include_in_schema,
            json_schema_extra=json_schema_extra,
            **extra,
        )


@dataclass(frozen=True)
class Depends:
    dependency: Optional[Callable[..., Any]] = None
    use_cache: bool = True
    scope: Union[Literal["function", "request"], None] = None


@dataclass(frozen=True)
class Security(Depends):

Для этого используем `security_scopes.scopes`, содержащий `list` со всеми этими scopes как `str`.

{* ../../docs_src/security/tutorial005_an_py310.py hl[130:136] *}

## Дерево зависимостей и scopes { #dependency-tree-and-scopes }

Ещё раз рассмотрим дерево зависимостей и scopes.

///

## Configuraciones en una dependencia { #settings-in-a-dependency }

En algunas ocasiones podría ser útil proporcionar las configuraciones desde una dependencia, en lugar de tener un objeto global con `settings` que se use en todas partes.

## Dependabot PRs

Dependabot will create PRs to update dependencies for several things, and those PRs all look similar, but some are way more delicate than others.

* If the PR is for a direct dependency, so, Dependabot is modifying `pyproject.toml`, **don't merge it**. 😱 Let me check it first. There's a good chance that some additional tweaks or updates are needed.

{* ../../docs_src/sql_databases/tutorial001_an_py310.py ln[21:22] hl[21:22] *}

### Criar uma Dependência de Sessão { #create-a-session-dependency }

Uma **`Session`** é o que armazena os **objetos na memória** e acompanha as alterações necessárias nos dados, para então **usar o `engine`** para se comunicar com o banco de dados.

```console
$ pip install pyjwt

---> 100%
```

</div>

/// info

If you are planning to use digital signature algorithms like RSA or ECDSA, you should install the cryptography library dependency `pyjwt[crypto]`.

You can read more about it in the <a href="https://pyjwt.readthedocs.io/en/latest/installation.html" class="external-link" target="_blank">PyJWT Installation docs</a>.

///

     */
    PathMatcher matcher(Collection<String> defaultIncludes, boolean useDefaultExcludes);

    /**
     * {@return in which context the source files will be used}
     * Not to be confused with dependency scope.
     * The default value is {@code "main"}.
     *
     * @see ProjectScope#MAIN
     */
    default ProjectScope scope() {
        return ProjectScope.MAIN;
    }

    /**

    * 標頭（Header）
    * 查詢參數
    * Cookies，等等。

加上来自 Starlette（包括 **session cookie**）的所有安全特性。

所有的這些都是可重複使用的工具和套件，可以輕鬆與你的系統、資料儲存（Data Stores）、關聯式資料庫（RDBMS）以及非關聯式資料庫（NoSQL）等等整合。


### 依賴注入（Dependency Injection）

FastAPI 有一個使用簡單，但是非常強大的<abbr title='也叫做 "components", "resources", "services", "providers"'><strong>依賴注入</strong></abbr>系統。

* 依賴項甚至可以有自己的依賴，從而形成一個層級或**依賴圖**的結構。
* 所有**自動化處理**都由框架完成。

Hierzu verwenden wir `security_scopes.scopes`, das eine `list`e mit allen diesen Scopes als `str` enthält.

{* ../../docs_src/security/tutorial005_an_py310.py hl[130:136] *}

## Abhängigkeitsbaum und Scopes { #dependency-tree-and-scopes }

Sehen wir uns diesen Abhängigkeitsbaum und die Scopes noch einmal an.