En este caso, la función de tarea escribirá en un archivo (simulando el envío de un email).

Y como la operación de escritura no usa `async` y `await`, definimos la función con un `def` normal:

{* ../../docs_src/background_tasks/tutorial001_py39.py hl[6:9] *}

## Agregar la tarea en segundo plano { #add-the-background-task }

 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */
package jcifs;

import java.io.InputStream;
import java.io.OutputStream;

/**
 * Handle to an open named pipe
 *
 * @author mbechler
 *
 */

 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */

package jcifs.dcerpc.msrpc;

import jcifs.internal.smb1.net.SmbShareInfo;
import jcifs.smb.FileEntry;

/**
 * MSRPC implementation for enumerating shares.

 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */
package jcifs.internal.fscc;

import jcifs.internal.AllocInfo;
import jcifs.internal.SMBProtocolDecodingException;
import jcifs.internal.util.SMBUtil;

/**

 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */
package jcifs.internal.witness;

/**
 * Represents a witness heartbeat response as defined in MS-SWN specification.
 * Contains the result of a witness heartbeat request.
 */

 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */
package jcifs.internal.witness;

/**
 * Represents a witness registration response as defined in MS-SWN specification.
 * Contains the result of a witness registration request.
 */

 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */

package jcifs.smb1.dcerpc.msrpc;

import jcifs.smb1.smb1.FileEntry;
import jcifs.smb1.smb1.SmbShareInfo;

/**
 * MS-RPC share enumeration operation.
 *

 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */

package jcifs.smb1.smb1;

import jcifs.smb1.util.LogStream;

class TransTransactNamedPipe extends SmbComTransaction {

    private final byte[] pipeData;

**funcionaria como esperado**. Se houver um parâmetro **obrigatório** (sem valor padrão), seu **editor** vai avisar com um erro, e o **Python** também reclamará se você executá-la sem passar o parâmetro obrigatório.

Quando você não usa `Annotated` e em vez disso usa o estilo de **valor padrão (antigo)**, se você chamar essa função sem FastAPI em **outros lugares**, terá que **lembrar** de passar os argumentos para a função para que funcione corretamente, caso contrário os valores serão diferentes...

 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */
package jcifs;

/**
 * Interface for opaque credential data
 *
 * @author mbechler
 *
 */
public interface Credentials {

    /**
     * Unwrap credentials to a specific type.
     *