// AssumeRole action. For more information about ARNs and how to use them in
	// policies, see IAM Identifiers (http://docs.aws.amazon.com/IAM/latest/UserGuide/reference_identifiers.html)
	// in Using IAM.
	//
	// Arn is a required field
	Arn string

	// A unique identifier that contains the role ID and the role session name of

{* ../../docs_src/path_params/tutorial005.py hl[1,6:9] *}

/// info | Bilgi

3.4 sürümünden beri <a href="https://docs.python.org/3/library/enum.html" class="external-link" target="_blank">enumerationlar (ya da enumlar) Python'da mevcuttur</a>.

///

/// tip | İpucu

{* ../../docs_src/path_params/tutorial005.py hl[1,6:9] *}

/// info | Додаткова інформація

<a href="https://docs.python.org/3/library/enum.html" class="external-link" target="_blank">Перелічення (або enums) доступні в Python</a> починаючи з версії 3.4.

///

/// tip | Порада

///

### Поле `examples` у JSON Schema

Пізніше JSON Schema додала поле <a href="https://json-schema.org/draft/2019-09/json-schema-validation.html#rfc.section.9.5" class="external-link" target="_blank">`examples`</a> у нову версію специфікації.

І вже OpenAPI 3.1.0 базується на цій новій версії (JSON Schema 2020-12), яка включає поле `examples`.

```Python hl_lines="3"
import os

name = os.getenv("MY_NAME", "World")
print(f"Hello {name} from Python")
```

/// tip

<a href="https://docs.python.org/3.8/library/os.html#os.getenv" class="external-link" target="_blank">`os.getenv()`</a> এর দ্বিতীয় আর্গুমেন্টটি হলো এর ডিফল্ট ভ্যালু যা রিটার্ন করা হবে।

```Python hl_lines="3"
import os

name = os.getenv("MY_NAME", "World")
print(f"Hello {name} from Python")
```

/// tip | Consejo

El segundo argumento de <a href="https://docs.python.org/3.8/library/os.html#os.getenv" class="external-link" target="_blank">`os.getenv()`</a> es el valor por defecto a retornar.

Si no se proporciona, es `None` por defecto; aquí proporcionamos `"World"` como el valor por defecto para usar.

///

Si planeas usar algoritmos de firma digital como RSA o ECDSA, deberías instalar la dependencia del paquete de criptografía `pyjwt[crypto]`.

Puedes leer más al respecto en la <a href="https://pyjwt.readthedocs.io/en/latest/installation.html" class="external-link" target="_blank">documentación de instalación de PyJWT</a>.

///

## Hashing de contraseñas

// that have an x-ignore- prefix) must appear in the list of conditions."
// https://docs.aws.amazon.com/AmazonS3/latest/API/sigv4-HTTPPOSTConstructPolicy.html
// keyInPolicyExceptions - list of keys that, when present in the form, can be missing in the conditions of the policy.
var keyInPolicyExceptions = map[string]bool{
	xhttp.AmzSignature: true,
	"File":             true,

You can read more about it in the <a href="https://pyjwt.readthedocs.io/en/latest/installation.html" class="external-link" target="_blank">PyJWT Installation docs</a>.

///

## Password hashing { #password-hashing }

import java.security.MessageDigest;

/**
 * Implements the MD4 message digest algorithm in Java.
 * <p>
 * <b>References:</b>
 * <ol>
 *   <li> Ronald L. Rivest,
 *        "<a href="http://www.roxen.com/rfc/rfc1320.html">
 *        The MD4 Message-Digest Algorithm</a>",
 *        IETF RFC-1320 (informational).
 * </ol>
 *
 * <p><b>$Revision: 1.2 $</b>
 * @author  Raif S. Naffah
 */