@functools.wraps(f)
    def method(*args, **kwargs):
        return f(*args, **kwargs)

    return method


def test_wrapped_method_type_inference():
    """
    Regression test ensuring that when a method imported from another module
    is decorated with something that sets the __wrapped__ attribute (functools.wraps),
    then the types are still processed correctly, including dereferencing of forward
    references.
    """

## Technical Details { #technical-details }

The class `BackgroundTasks` comes directly from <a href="https://www.starlette.dev/background/" class="external-link" target="_blank">`starlette.background`</a>.

It is imported/included directly into FastAPI so that you can import it from `fastapi` and avoid accidentally importing the alternative `BackgroundTask` (without the `s` at the end) from `starlette.background`.

We are importing the submodule `items` directly, instead of importing just its variable `router`.

This is because we also have another variable named `router` in the submodule `users`.

If we had imported one after the other, like:

```Python
from .routers.items import router
from .routers.users import router
```

depends on functionality of the <i>imported</i> package
(<a href="#Program_initialization_and_execution">§Program initialization and execution</a>)
and enables access to <a href="#Exported_identifiers">exported</a> identifiers
of that package.
The import names an identifier (PackageName) to be used for access and an ImportPath
that specifies the package to be imported.
</p>

<pre class="ebnf">

Então, a seção:

```Python
    uvicorn.run(app, host="0.0.0.0", port=8000)
```

vai executar.

---

Isso não acontecerá se você importar esse módulo (arquivo).

Então, se você tiver outro arquivo `importer.py` com:

```Python
from myapp import app

# Mais um pouco de código
```

nesse caso, a variável criada automaticamente dentro de `myapp.py` não terá a variável `__name__` com o valor `"__main__"`.

Mas ele ainda faz parte da mesma aplicação/web API **FastAPI** (faz parte do mesmo "pacote Python").

Você pode criar as *operações de rotas* para esse módulo usando o `APIRouter`.

### Importe `APIRouter` { #import-apirouter }

você o importa e cria uma "instância" da mesma maneira que faria com a classe `FastAPI`:

## Importe `Path` { #import-path }

Primeiro, importe `Path` de `fastapi`, e importe `Annotated`:

{* ../../docs_src/path_params_numeric_validations/tutorial001_an_py310.py hl[1,3] *}

/// info | Informação

Seit FastAPI 0.119.0 gibt es außerdem eine teilweise Unterstützung für Pydantic v1 innerhalb von Pydantic v2, um die Migration auf v2 zu erleichtern.

Sie könnten also Pydantic auf die neueste Version 2 aktualisieren und die Importe so ändern, dass das Untermodul `pydantic.v1` verwendet wird, und in vielen Fällen würde es einfach funktionieren.

{* ../../docs_src/pydantic_v1_in_v2/tutorial002_an_py310.py hl[2,5,15] *}

/// warning | Achtung

## Usando `BackgroundTasks` { #using-backgroundtasks }

Primeiro, importe `BackgroundTasks` e defina um parâmetro na sua *função de operação de rota* com uma declaração de tipo `BackgroundTasks`:

{* ../../docs_src/background_tasks/tutorial001_py39.py hl[1,13] *}

```Python
    uvicorn.run(app, host="0.0.0.0", port=8000)
```

будет запущена.

---

Но этого не произойдет, если вы импортируете этот модуль (файл).

Таким образом, если у вас есть файл `importer.py` с таким импортом:

```Python
from myapp import app

# Some more code
```

то автоматическая создаваемая внутри файла `myapp.py` переменная  `__name__` будет иметь значение отличающееся от `"__main__"`.