## Den Code ausführen

Alle Codeblöcke können kopiert und direkt verwendet werden (da es sich um getestete Python-Dateien handelt).

Um eines der Beispiele auszuführen, kopieren Sie den Code in eine Datei `main.py`, und starten Sie `uvicorn` mit:

<div class="termy">

```console
$ uvicorn main:app --reload

<span style="color: green;">INFO</span>:     Uvicorn running on http://127.0.0.1:8000 (Press CTRL+C to quit)

  display: inline-block;
}

a.external-link::after {
  /* \00A0 is a non-breaking space
        to make the mark be on the same line as the link
    */
  content: "\00A0[↪]";
}

a.internal-link::after {
  /* \00A0 is a non-breaking space
        to make the mark be on the same line as the link
    */
  content: "\00A0↪";
}

.shadow {
  box-shadow: 5px 5px 10px #999;
}

import okio.ForwardingFileSystem
import okio.Path
import okio.Sink
import okio.Source

class LoggingFilesystem(
  fileSystem: FileSystem,
) : ForwardingFileSystem(fileSystem) {
  fun log(line: String) {
    println(line)
  }

  override fun appendingSink(
    file: Path,
    mustExist: Boolean,
  ): Sink {
    log("appendingSink($file)")

    return super.appendingSink(file, mustExist)
  }

 *
 * <p>This package contains interfaces and classes for the interactive Maven shell,
 * which provides a command-line interface for executing Maven commands and
 * managing build environments.</p>
 *
 * <p>Key features include:</p>
 * <ul>
 *   <li>Interactive command-line interface</li>
 *   <li>Command history and completion</li>
 *   <li>Built-in shell commands</li>
 *   <li>Project navigation and management</li>

     */
    public static final String FILE_ENCODING = System.getProperty("file.encoding");

    /**
     * <code>line.separator</code> system property. For example, on Mac OS X: <code>"\n"</code>
     */
    public static final String LINE_SEPARATOR = System.getProperty("line.separator");

    /**
     * <code>path.separator</code> system property. For example, on Mac OS X: <code>":"</code>
     */

    }

    /**
     * Adds a single command-line argument to pass to the Python script.
     *
     * @param value the argument value to add
     * @return this PythonJob instance for method chaining
     */
    public PythonJob arg(final String value) {
        argList.add(value);
        return this;
    }

    /**
     * Adds multiple command-line arguments to pass to the Python script.
     *

<a href="https://www.permit.io/blog/implement-authorization-in-fastapi?utm_source=github&utm_medium=referral&utm_campaign=fastapi" target="_blank" title="Fine-Grained Authorization for FastAPI"><img src="https://fastapi.tiangolo.com/img/sponsors/permit.png"></a>

    public void setSource(String source) {
        this.source = source;
    }

    @Override
    public void add(Problem.Severity severity, String message, int line, int column, Exception cause) {
        Problem problem = new DefaultProblem(message, severity, source, line, column, cause);

        problems.add(problem);
    }

Schauen wir uns an, wie wir das machen können.

## pytest.mark.anyio

Nehmen wir an, Sie haben eine Dateistruktur wie in [Größere Anwendungen](bigger-applications.md){.internal-link target=_blank} beschrieben:

```
.
├── app
│   ├── __init__.py
│   └── main.py
```

In der Datei `main.py` haben Sie Ihre **FastAPI**-Anwendung:


{* ../../docs_src/app_testing/main.py *}


### Testdatei