* Crie um objeto `templates` que você possa reutilizar posteriormente.
* Declare um parâmetro `Request` no *path operation* que retornará um template.
* Use o `templates` que você criou para renderizar e retornar uma `TemplateResponse`, passe o nome do template, o objeto `request` e um dicionário "context" com pares chave-valor a serem usados dentro do template do Jinja2.

{* ../../docs_src/templates/tutorial001_py39.py hl[4,11,15:18] *}

/// note | Nota

🐔 Ready the chicken! Your app is ready at https://myapp.fastapicloud.dev
```

</div>

¡Eso es todo! Ahora puedes acceder a tu app en esa URL. ✨

## Recapitulación, paso a paso { #recap-step-by-step }

### Paso 1: importa `FastAPI` { #step-1-import-fastapi }

{* ../../docs_src/first_steps/tutorial001_py39.py hl[1] *}

`FastAPI` es una clase de Python que proporciona toda la funcionalidad para tu API.

		Height:   sql.NullFloat64{Float64: 1.8888, Valid: true},
		Birthday: sql.NullTime{Time: time.Now(), Valid: true},
		Allergen: NullString{sql.NullString{String: "Allergen", Valid: true}},
		Password: EncryptedData("pass1"),
		Bytes:    []byte("byte"),
		Num:      18,
		Strings:  StringsSlice{"a", "b", "c"},
		Structs: StructsSlice{
			{"name1", "value1"},
			{"name2", "value2"},
		},
		Role:             Role{Name: "admin"},

        data.putValue(ExtractData.RESOURCE_NAME_KEY, "test.pdf");
        data.putValue(ExtractData.URL, "https://example.com/test.pdf");
        data.putValues(ExtractData.FILE_PASSWORDS, new String[] { "pass1", "pass2" });

        assertEquals("test.pdf", data.getValues(ExtractData.RESOURCE_NAME_KEY)[0]);
        assertEquals("https://example.com/test.pdf", data.getValues(ExtractData.URL)[0]);

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

/// tip | Dica

Garanta utilizar `yield` apenas uma vez por dependência.

///

/// note | Detalhes Técnicos

        @app.get("/items/{id}")
        def read_items(id: list[Item]):
            pass  # pragma: no cover


def test_invalid_tuple():
    with pytest.raises(AssertionError):
        app = FastAPI()

        class Item(BaseModel):
            title: str

        @app.get("/items/{id}")
        def read_items(id: tuple[Item, Item]):
            pass  # pragma: no cover


def test_invalid_dict():

import pytest
from fastapi import FastAPI
from fastapi.exceptions import FastAPIError


class NonPydanticModel:
    pass


def test_invalid_response_model_raises():
    with pytest.raises(FastAPIError):
        app = FastAPI()

        @app.get("/", response_model=NonPydanticModel)
        def read_root():
            pass  # pragma: nocover


def test_invalid_response_model_sub_type_raises():
    with pytest.raises(FastAPIError):

{* ../../docs_src/security/tutorial005_an_py310.py hl[5,9,13,47,65,106,108:116,122:126,130:136,141,157] *}

Ahora revisemos esos cambios paso a paso.

## Esquema de seguridad OAuth2 { #oauth2-security-scheme }

El primer cambio es que ahora estamos declarando el esquema de seguridad OAuth2 con dos scopes disponibles, `me` y `items`.

@app.get("/valid1", responses={"500": {"model": int}})
def valid1():
    pass


@app.get("/valid2", responses={"500": {"model": list[int]}})
def valid2():
    pass


@app.get("/valid3", responses={"500": {"model": Model}})
def valid3():
    pass


@app.get("/valid4", responses={"500": {"model": list[Model]}})
def valid4():
    pass


client = TestClient(app)


def test_path_operations():

        with client.websocket_connect("/ws/invalid"):
            pass  # pragma: no cover
    except Exception:
        pass

    assert captured_exception.exception is not None
    error_str = str(captured_exception.exception)
    assert "websocket_endpoint" in error_str
    assert "/ws/" in error_str


def test_subapp_request_validation_error_includes_endpoint_context():
    captured_exception.exception = None
    try: