///

### Import `Depends` { #import-depends }

{* ../../docs_src/dependencies/tutorial001_an_py310.py hl[3] *}

### Declare the dependency, in the "dependant" { #declare-the-dependency-in-the-dependant }

The same way you use `Body`, `Query`, etc. with your *path operation function* parameters, use `Depends` with a new parameter:

            assertNotNull(e.getCause());
            assertTrue(e.getCause() instanceof IllegalArgumentException);
        }
    }

    /**
     * Test exception in method that declares throws
     */
    public void test_exceptionInMethod() {
        try {
            methodThatThrowsException();
            fail("Should have thrown CrawlerSystemException");

  and this will lead to counter-intuitive results. A different feature may exist
  unimplemented, which is to detect when the network is down and provide better
  feedback for that case. However, when offline mode is declared, nothing
  earmarked as remote should be accessed, regardless of whether it is actually
  a physically local resource.

  NOTE: One side effect of this design change is that all offline-mode code can

## Inyección de Dependencias { #dependency-injection }

Usar `BackgroundTasks` también funciona con el sistema de inyección de dependencias, puedes declarar un parámetro de tipo `BackgroundTasks` en varios niveles: en una *path operation function*, en una dependencia (dependable), en una sub-dependencia, etc.

        } catch (final NoSuchFieldException e) {
            throw new NoSuchFieldRuntimeException(clazz, name, e);
        }
    }

    /**
     * Returns a {@link Field} object that reflects the specified declared field of the class or interface represented by the {@link Class} object.
     *
     * @param clazz
     *            The {@link Class} object representing the class. Must not be {@literal null}.
     * @param name

        PluginPrefixResult result = resolveFromRepository(request, candidates);

        // If we haven't been able to resolve the plugin from the repository,
        // as a last resort, we go through all declared plugins, load them
        // one by one, and try to find a matching prefix.
        if (result == null && build != null) {
            result = resolveFromProject(request, build.getPlugins());

Il est intégré à Let's Encrypt. Ainsi, il peut gérer toutes les parties HTTPS, y compris l'acquisition et le renouvellement des certificats.

///

Esse parâmetro não cria aquele endpoint/operação de rota, mas declara que a URL `/token` será aquela que o client deve usar para obter o token. Essa informação é usada no OpenAPI e depois nos sistemas de documentação interativa da API.

Em breve também criaremos a operação de rota real.

///

Este parámetro no crea ese endpoint / *path operation*, pero declara que la URL `/token` será la que el cliente deberá usar para obtener el token. Esa información se usa en OpenAPI, y luego en los sistemas de documentación interactiva del API.

Pronto también crearemos la verdadera *path operation*.

But if you return a `Response` directly (or any subclass, like `JSONResponse`), the data won't be automatically converted (even if you declare a `response_model`), and the documentation won't be automatically generated (for example, including the specific "media type", in the HTTP header `Content-Type` as part of the generated OpenAPI).