echo 'If you have not, you will see a lot of undefined variable errors.'
else
  FROM_ENV=$(mktemp)
  # "export -p" prints a list of environment values in a safe-to-source format,
  # e.g. `declare -x TFCI_BAZEL_COMMON_ARGS="list of args"` for bash.
  export -p | grep TFCI > "$FROM_ENV"

  # Source the default ci values
  source ./ci/official/envs/ci_default

  # TODO(angerson) write this documentation

The `root_path` is used to handle these specific cases.

And it's also used internally when mounting sub-applications.

Having a proxy with a stripped path prefix, in this case, means that you could declare a path at `/app` in your code, but then, you add a layer on top (the proxy) that would put your **FastAPI** application under a path like `/api/v1`.

In this case, the original path `/app` would actually be served at `/api/v1/app`.

## Dependency Injection { #dependency-injection }

Using `BackgroundTasks` also works with the dependency injection system, you can declare a parameter of type `BackgroundTasks` at multiple levels: in a *path operation function*, in a dependency (dependable), in a sub-dependency, etc.

Mas você ainda pode documentar como descrito em [Retornos Adicionais no OpenAPI](additional-responses.md){.internal-link target=_blank}.

## Поля-списки с параметром типа { #list-fields-with-type-parameter }

В Python есть специальный способ объявлять списки с внутренними типами, или «параметрами типа»:

### Объявите `list` с параметром типа { #declare-a-list-with-a-type-parameter }

Для объявления типов, у которых есть параметры типа (внутренние типы), таких как `list`, `dict`, `tuple`, передайте внутренний(ие) тип(ы) как «параметры типа», используя квадратные скобки: `[` и `]`

   * FeatureSpecificTestSuiteBuilder.suppressing()}.
   */
  /*
   * TODO(cpovirk): or we could make HOLES_FORBIDDEN a feature. Or we could declare that
   * implementations are permitted to throw IAE if a hole is requested, and we could update
   * test*Hole to permit IAE. (But might this ignore genuine bugs?) But see the TODO above

Se você estiver utilizando bibliotecas de terceiros que dizem para você chamar as funções com `await`, como:

```Python
results = await some_library()
```

Então, declare suas *funções de operação de rota* com `async def` como:

```Python hl_lines="2"
@app.get('/')
async def read_results():
    results = await some_library()
    return results
```

/// note | Nota

    <_comment>HyperText Markup Language</_comment>
    <acronym>HTML</acronym>
    <tika:uti>public.html</tika:uti>
     <!-- TIKA-327: if you encounter tags in the HTML
          with no declared namespace, it's not XHTML, it's just
          bad HTML, unfortunately.
     -->
    <root-XML localName="html"/>
    <root-XML localName="HTML"/>
    <root-XML localName="link"/>

   * probably work around it by changing how we annotate the J2CL EnumMap, but that's probably more
   * trouble than just using Object.class.)
   *
   * Then we declare the getters for these fields as @GwtIncompatible so that no one can try to use
   * them under J2CL—or, as an unfortunate side effect, under GWT. We do still give the fields

Vamos fazer com que ele nos forneça o usuário atual.

## Criar um modelo de usuário { #create-a-user-model }

Primeiro, vamos criar um modelo de usuário com Pydantic.

Da mesma forma que usamos o Pydantic para declarar corpos, podemos usá-lo em qualquer outro lugar:

{* ../../docs_src/security/tutorial002_an_py310.py hl[5,12:6] *}

## Criar uma dependência `get_current_user` { #create-a-get-current-user-dependency }