* Support for complex user authentication systems, **database connections**, etc.
* **No compromise** with databases, frontends, etc. But easy integration with all of them.

### Unlimited "plug-ins"

Or in other way, no need for them, import and use the code you need.

# Classes como Dependências

Antes de nos aprofundarmos no sistema de **Injeção de Dependência**, vamos melhorar o exemplo anterior.

## `dict` do exemplo anterior

No exemplo anterior, nós retornávamos um `dict` da nossa dependência ("injetável"):

//// tab | Python 3.10+

```Python hl_lines="9"
{!> ../../docs_src/dependencies/tutorial001_an_py310.py!}
```

////

//// tab | Python 3.9+

```Python hl_lines="11"

   correction. This disclaimer of warranty constitutes an essential part of this
   License. No use of  any Covered Software is authorized under this License
   except under this disclaimer.

7. Limitation of Liability

   Under no circumstances and under no legal theory, whether tort (including
   negligence), contract, or otherwise, shall any Contributor, or anyone who

### Simplemente Python moderno

Todo está basado en las declaraciones de tipo de **Python 3.8** estándar (gracias a Pydantic). No necesitas aprender una sintaxis nueva, solo Python moderno.

Si necesitas un repaso de 2 minutos de cómo usar los tipos de Python (así no uses FastAPI) prueba el tutorial corto: [Python Types](python-types.md){.internal-link target=_blank}.

Escribes Python estándar con tipos así:

```Python

    echo help               Print this message
    echo.
    echo Options:
    echo -jvm-debug [port]  Turn on JVM debugging, open at the given port.  Defaults to 9999 if no port given.
    echo.
    echo Environment variables ^(read from context^):
    echo JAVA_OPTS          Environment variable, if unset uses ""
    echo SBT_OPTS           Environment variable, if unset uses ""

// The argument list is nil for no parens on the definition; otherwise a list of
// formal argument names.
func (in *Input) macroDefinition(name string) ([]string, []Token) {
	prevCol := in.Stack.Col()
	tok := in.Stack.Next()
	if tok == '\n' || tok == scanner.EOF {
		return nil, nil // No definition for macro
	}
	var args []string
	// The C preprocessor treats

			expectedString:   `config dump has no configuration type`,
			wantException:    true,
		},
		{ // supplying valid pod name retrieves Envoy config (fails because we don't check in Envoy config unit tests)
			execClientConfig: loggingConfig,
			args:             strings.Split("bootstrap httpbin-794b576b6c-qx6pf", " "),
			expectedString:   `config dump has no configuration type`,
			wantException:    true,
		},

        assertThat(network.removeNode(nodeList.get(i))).isTrue();
      }

      assertThat(network.nodes()).isEmpty();
      assertThat(network.edges()).isEmpty(); // no edges can remain if there's no nodes
      AbstractNetworkTest.validateNetwork(network);

      Collections.shuffle(nodeList, gen);
      for (Integer node : nodeList) {
        assertThat(network.addNode(node)).isTrue();
      }

        assertThat(graph.removeNode(nodeList.get(i))).isTrue();
      }

      assertThat(graph.nodes()).isEmpty();
      assertThat(graph.edges()).isEmpty(); // no edges can remain if there's no nodes
      AbstractGraphTest.validateGraph(graph);

      Collections.shuffle(nodeList, gen);
      for (Integer node : nodeList) {
        assertThat(graph.addNode(node)).isTrue();
      }

* `routes`: Uma lista de rotas, que são cada uma das *operações de rota* registradas. Elas são obtidas de `app.routes`.

/// info | Informação

O parâmetro `summary` está disponível no OpenAPI 3.1.0 e superior, suportado pelo FastAPI 0.99.0 e superior.

///

## Sobrescrevendo os padrões