* El *path* puede contener una <a href="https://github.com/OAI/OpenAPI-Specification/blob/master/versions/3.1.0.md#key-expression" class="external-link" target="_blank">expresión OpenAPI 3</a> (ver más abajo) donde puede usar variables con parámetros y partes del request original enviado a *tu API*.

### La expresión del path del callback

/**
 * A {@code double} array in which elements may be updated atomically. See the {@link
 * java.util.concurrent.atomic} package specification for description of the properties of atomic
 * variables.
 *
 * <p><a id="bitEquals"></a>This class compares primitive {@code double} values in methods such as
 * {@link #compareAndSet} by comparing their bitwise representation using {@link

Beispielsweise verwendet der Google Login OpenID Connect (welches seinerseits OAuth2 verwendet).

Aber der Facebook Login unterstützt OpenID Connect nicht. Es hat seine eigene Variante von OAuth2.

### OpenID (nicht „OpenID Connect“)

Es gab auch eine „OpenID“-Spezifikation. Sie versuchte das Gleiche zu lösen wie **OpenID Connect**, basierte aber nicht auf OAuth2.

Je schrijft gewoon standaard Python met types:

```Python
from datetime import date

from pydantic import BaseModel

# Declareer een variabele als een str
# en krijg editorondersteuning in de functie
def main(user_id: str):
    return user_id


# Een Pydantic model
class User(BaseModel):
    id: int
    name: str
    joined: date
```

```

</div>

Aquele commando por linha de programa chamado `fastapi` é o **FastAPI CLI**.

O FastAPI CLI recebe o caminho do seu programa Python, detecta automaticamente a variável com o FastAPI (comumente nomeada `app`) e como importá-la, e então a serve.

Para produção você usaria `fastapi run` no lugar. 🚀

import java.util.function.DoubleUnaryOperator;

/**
 * A {@code double} value that may be updated atomically. See the {@link
 * java.util.concurrent.atomic} package specification for description of the properties of atomic
 * variables. An {@code AtomicDouble} is used in applications such as atomic accumulation, and
 * cannot be used as a replacement for a {@link Double}. However, this class does extend {@code

// Erasure backend for admin-handler tests.
func prepareAdminErasureTestBed(ctx context.Context) (*adminErasureTestBed, error) {
	ctx, cancel := context.WithCancel(ctx)

	// reset global variables to start afresh.
	resetTestGlobals()

	// Set globalIsErasure to indicate that the setup uses an erasure
	// code backend.
	globalIsErasure = true

	// Initializing objectLayer for HealFormatHandler.

    String getCrawlerFileProtocols();

    /**
     * Get the value for the key 'crawler.data.env.param.key.pattern'. <br>
     * The value is, e.g. ^FESS_ENV_.* <br>
     * comment: Pattern for environment variable keys in crawling data.
     * @return The value of found property. (NotNull: if not found, exception but basically no way)
     */
    String getCrawlerDataEnvParamKeyPattern();

    /**

# Path Parameters { #path-parameters }

You can declare path "parameters" or "variables" with the same syntax used by Python format strings:

{* ../../docs_src/path_params/tutorial001.py hl[6:7] *}

The value of the path parameter `item_id` will be passed to your function as the argument `item_id`.

# Parámetros de Path

Puedes declarar "parámetros" o "variables" de path con la misma sintaxis que se usa en los format strings de Python:

{* ../../docs_src/path_params/tutorial001.py hl[6:7] *}

El valor del parámetro de path `item_id` se pasará a tu función como el argumento `item_id`.

Así que, si ejecutas este ejemplo y vas a <a href="http://127.0.0.1:8000/items/foo" class="external-link" target="_blank">http://127.0.0.1:8000/items/foo</a>, verás un response de: