* And the file `app/internal/admin.py` is another submodule: `app.internal.admin`.

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

The same file structure with comments:

```bash
.
├── app                  # "app" is a Python package
│   ├── __init__.py      # this file makes "app" a "Python package"

 * which is in O(d_node) where d_node is the degree of {@code node}.
 *
 * @author James Sexton
 * @author Joshua O'Madadhain
 * @author Omar Darwish
 * @param <N> Node parameter type
 * @param <E> Edge parameter type
 */
final class StandardMutableNetwork<N, E> extends StandardNetwork<N, E>
    implements MutableNetwork<N, E> {

                                a.click();
                            }
                        });

                        var divider = document.createElement("hr");
                        divider.style.margin = "5px";
                        var tip = document.createElement("small");
                        tip.textContent = "Use the 'bin.cmp.report.severity.filter' property to set the default severity filter";

	return dstRec, nil
}

// Close - closes underlying reader.
func (r *Reader) Close() error {
	// Close the input.
	err := r.readCloser.Close()
	for range r.valueCh {
		// Drain values so we don't leak a goroutine.
		// Since we have closed the input, it should fail rather quickly.
	}
	return err
}

// NewReader - creates new JSON reader using readCloser.

import java.util.concurrent.ThreadFactory;
import junit.framework.TestCase;
import org.jspecify.annotations.NullUnmarked;

/**
 * Tests for ThreadFactoryBuilder.
 *
 * @author Kurt Alfred Kluever
 * @author Martin Buchholz
 */
@NullUnmarked
@GwtIncompatible
@J2ktIncompatible
public class ThreadFactoryBuilderTest extends TestCase {
  private final Runnable monitoredRunnable = () -> completed = true;

 * of the {@code Immutable*} types</a> for more information on the properties and guarantees
 * provided by this class.
 *
 * @author James Sexton
 * @author Joshua O'Madadhain
 * @author Omar Darwish
 * @author Jens Nyman
 * @param <N> Node parameter type
 * @since 20.0
 */
@Immutable(containerOf = {"N"})
public class ImmutableGraph<N> extends ForwardingGraph<N> {

 *
 * <p>The time complexity of all collection-returning accessors is O(1), since views are returned.
 *
 * @author James Sexton
 * @author Joshua O'Madadhain
 * @author Omar Darwish
 * @param <N> Node parameter type
 * @param <E> Edge parameter type
 */
class StandardNetwork<N, E> extends AbstractNetwork<N, E> {
  private final boolean isDirected;
  private final boolean allowsParallelEdges;

import junit.framework.TestCase;
import org.jspecify.annotations.NullUnmarked;
import org.jspecify.annotations.Nullable;

/**
 * Tests for {@link GcFinalization}.
 *
 * @author Martin Buchholz
 * @author mike nonemacher
 */

@NullUnmarked
public class GcFinalizationTest extends TestCase {

  // ----------------------------------------------------------------

* 還有一個子目錄 `app/internal/`，裡面有另一個 `__init__.py` 檔案，所以它又是一個「Python 子套件」：`app.internal`。
* 檔案 `app/internal/admin.py` 是另一個子模組：`app.internal.admin`。

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

同樣的檔案結構，附上註解：

```bash
.
├── app                  # 「app」是一個 Python 套件
│   ├── __init__.py      # 這個檔案讓「app」成為「Python 套件」
│   ├── main.py          # 「main」模組，例如 import app.main

* Ve `app/internal/admin.py` dosyası başka bir submodule’dür: `app.internal.admin`.

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

Aynı dosya yapısı, yorumlarla birlikte:

```bash
.
├── app                  # "app" bir Python package'idir
│   ├── __init__.py      # bu dosya, "app"i bir "Python package" yapar