* O mesmo com `app/routers/users.py`,  ele é outro submódulo: `app.routers.users`.
* Há também um subdiretório `app/internal/` com outro arquivo `__init__.py`, então ele é outro "subpacote Python":`app.internal`.
* E o arquivo `app/internal/admin.py` é outro submódulo: `app.internal.admin`.

<img src="/img/tutorial/bigger-applications/package.drawio.svg">

A mesma estrutura de arquivos com comentários:

```
.

 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package okhttp3.internal.connection

import java.io.IOException

/** Attempt routes one at a time until one connects. */
internal class SequentialExchangeFinder(
  override val routePlanner: RoutePlanner,
) : ExchangeFinder {
  override fun find(): RealConnection {

 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package okhttp3.internal.platform

import android.content.Context
import android.os.Build
import java.lang.IllegalStateException
import okhttp3.internal.platform.android.AndroidLog

actual object PlatformRegistry {
  actual fun findPlatform(): Platform {
    AndroidLog.enable()

 * 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

import org.junit.jupiter.params.provider.ValueSource;
import org.mockito.Mock;
import org.mockito.junit.jupiter.MockitoExtension;

import jcifs.CIFSContext;
import jcifs.Configuration;
import jcifs.internal.smb2.Smb2Constants;
import jcifs.internal.util.SMBUtil;

@ExtendWith(MockitoExtension.class)
class Smb2LogoffRequestTest {

    @Mock
    Configuration configuration;

    @Mock
    CIFSContext cifsContext;

 * 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.ioctl;

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

/**
 * SMB2 SRV_REQUEST_RESUME_KEY response data structure. This structure contains a resume key
 * that can be used for server-side copy operations.

import okhttp3.Request
import okhttp3.RequestBody
import okhttp3.SimpleProvider
import okhttp3.internal.http.CancelTest.CancelMode.CANCEL
import okhttp3.internal.http.CancelTest.CancelMode.INTERRUPT
import okhttp3.internal.http.CancelTest.ConnectionType.H2
import okhttp3.internal.http.CancelTest.ConnectionType.HTTP
import okhttp3.internal.http.CancelTest.ConnectionType.HTTPS
import okhttp3.testing.PlatformRule
import okio.Buffer

package jcifs.internal.smb2.nego;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

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

/**
 * SMB 3.1.1 Compression Capabilities negotiate context.
 *
 * This context is used during SMB2 negotiation to negotiate compression
 * algorithms for SMB3 data compression support.
 */

 *  limitations under the License.
 */
package okhttp3.internal.tls

import java.security.cert.CertificateParsingException
import java.security.cert.X509Certificate
import java.util.Locale
import javax.net.ssl.HostnameVerifier
import javax.net.ssl.SSLException
import javax.net.ssl.SSLSession
import okhttp3.internal.canParseAsIpAddress
import okhttp3.internal.toCanonicalHost
import okio.utf8Size

/**