## Using `BackgroundTasks` { #using-backgroundtasks }

First, import `BackgroundTasks` and define a parameter in your *path operation function* with a type declaration of `BackgroundTasks`:

{* ../../docs_src/background_tasks/tutorial001.py hl[1,13] *}

package jcifs.dcerpc.msrpc;

import jcifs.dcerpc.DcerpcMessage;
import jcifs.dcerpc.ndr.NdrBuffer;
import jcifs.dcerpc.ndr.NdrException;
import jcifs.dcerpc.ndr.NdrLong;
import jcifs.dcerpc.ndr.NdrObject;

/**
 * DCE/RPC interface for Distributed File System (DFS) operations.
 * Provides structures and methods for DFS management and enumeration.
 */
@SuppressWarnings("all")
public class netdfs {

    /**

 * implied.  See the License for the specific language governing
 * permissions and limitations under the License.
 */

package com.google.common.hash;

import com.google.common.annotations.GwtCompatible;
import com.google.errorprone.annotations.CanIgnoreReturnValue;

/** Static utility method for unchecked throwing of any {@link Throwable}. */
@GwtCompatible
final class SneakyThrows<T extends Throwable> {

 * implied.  See the License for the specific language governing
 * permissions and limitations under the License.
 */

package com.google.common.base;

import com.google.common.annotations.GwtCompatible;
import com.google.errorprone.annotations.CanIgnoreReturnValue;

/** Static utility method for unchecked throwing of any {@link Throwable}. */
@GwtCompatible
final class SneakyThrows<T extends Throwable> {

 * 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.smb1.trans;

import jcifs.Configuration;
import jcifs.internal.SMBProtocolDecodingException;

/**
 * Response for SMB1 TRANS_CALL_NAMED_PIPE transaction.
 *
 * This response contains the data returned from the named pipe

 * 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.smb2.lock;

import jcifs.Encodable;
import jcifs.internal.util.SMBUtil;

/**
 * SMB2 Lock data structure.
 *
 * This class represents a single lock element used in
 * SMB2 Lock requests for byte-range locking.
 *
 * @author mbechler
 */

Así que, la sección:

```Python
    uvicorn.run(app, host="0.0.0.0", port=8000)
```

se ejecutará.

---

Esto no ocurrirá si importas ese módulo (archivo).

Entonces, si tienes otro archivo `importer.py` con:

```Python
from myapp import app

# Algún código adicional
```

Тогда выполнится условие и эта часть кода:

```Python
    uvicorn.run(app, host="0.0.0.0", port=8000)
```

будет запущена.

---

Но этого не произойдет, если вы импортируете этот модуль (файл).

Таким образом, если у вас есть файл `importer.py` с таким импортом:

```Python
from myapp import app

# Some more code
```

 * 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.smb1.trans.nt;

import jcifs.Configuration;
import jcifs.internal.smb1.ServerMessageBlock;

/**
 * SMB1 NT Cancel command implementation.
 * Provides functionality to cancel previously issued SMB1 NT transaction commands

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

/**
 * File System Control Code (FSCC) structure for File Internal Information.
 * Provides access to the file's internal index number, which is a unique identifier