**FastAPI** maakt gebruik van type hints om verschillende dingen te doen.

Met **FastAPI** declareer je parameters met type hints en krijg je:

* **Editor ondersteuning**.
* **Type checks**.

...en **FastAPI** gebruikt dezelfde declaraties om:

* **Vereisten te definïeren **: van request pad parameters, query parameters, headers, bodies, dependencies, enz.
* **Data te converteren**: van de request naar het vereiste type.

```Python hl_lines="4"
{!> ../../docs_src/python_types/tutorial006.py!}
```

////

/// info | Informação

Estes tipos internos dentro dos colchetes são chamados "parâmetros de tipo" (type parameters).

Neste caso, `str` é o parâmetro de tipo passado para `List` (ou `list` no Python 3.9 ou superior).

///

Isso significa: "a variável `items` é uma `list`, e cada um dos itens desta lista é uma `str`".

/// tip | Dica

///

It has all the information about the *path operation* and is used to generate the automatic documentation.

It includes the `tags`, `parameters`, `requestBody`, `responses`, etc.

This *path operation*-specific OpenAPI schema is normally generated automatically by **FastAPI**, but you can also extend it.

/// tip

This is a low level extension point.

## API Request Parameters

### WebIdentityToken

///

Es hat alle Informationen zur *Pfadoperation* und wird zur Erstellung der automatischen Dokumentation verwendet.

Es enthält `tags`, `parameters`, `requestBody`, `responses`, usw.

Dieses *Pfadoperation*-spezifische OpenAPI-Schema wird normalerweise automatisch von **FastAPI** generiert, Sie können es aber auch erweitern.

/// tip | "Tipp"

        nameAnnotation.get().name
      } else {
        defaultName
      }
    return extensionContext.resource.server(name)
  }

  /** Start the servers passed in as test method parameters. */
  override fun beforeEach(context: ExtensionContext) {
    context.resource.startAll()
  }

  override fun afterEach(context: ExtensionContext) {
    context.resource.shutdownAll()
  }

   * that conversion is safe.
   *
   * <p>This method is intended to help with usages of type parameters that have {@linkplain
   * ParametricNullness parametric nullness}. If a type parameter instead ranges over only non-null
   * types (or if the type is a non-variable type, like {@code String}), then code should almost

By default, the temporary security credentials created by AssumeRoleWithClientGrants last for one hour. However, use the optional DurationSeconds parameter to specify the duration of the credentials. This value varies from 900 seconds (15 minutes) up to the maximum session duration of 365 days.

## API Request Parameters

### Token

```

If you need to upgrade all of the packages in requirements lock file, just pass
the `--upgrade` parameter:

```
bazel run //ci/official/requirements_updater:requirements.update --repo_env=HERMETIC_PYTHON_VERSION=3.12 -- --upgrade
```

For the full set of supported parameters please check
[pip-compile](https://pip-tools.readthedocs.io/en/latest/cli/pip-compile/)

It is designed to have functions that receive two parameters, one "request" and one "response". Then you "read" parts from the request, and "write" parts to the response. Because of this design, it is not possible to declare request parameters and bodies with standard Python type hints as function parameters.