{* ../../docs_src/path_operation_advanced_configuration/tutorial003_py310.py hl[6] *}

## Advanced description from docstring { #advanced-description-from-docstring }

You can limit the lines used from the docstring of a *path operation function* for OpenAPI.

Adding an `\f` (an escaped "form feed" character) causes **FastAPI** to truncate the output used for OpenAPI at this point.

        Jsoup.connect(buildToolsUrl)
            .get()
            .select("section:has(> h3#kts)")
            .first()
            ?.text()
            ?.lines()
            ?.firstOrNull { it.contains("buildToolsVersion = ") }
            ?.substringAfter("buildToolsVersion = ")
            ?.trim('"', ' ')
            ?: error("Couldn't find buildToolsVersion on $buildToolsUrl")

And all of them (or any portion of them that you want) can take advantage of re-using these dependencies or any other dependencies you create.

And all these thousands of *path operations* can be as small as 3 lines:

{* ../../docs_src/security/tutorial002_an_py310.py hl[30:32] *}

## Recap { #recap }

You can now get the current user directly in your *path operation function*.

We are already halfway there.

Möchten Sie eine `id` und eine `email` und keinen `username` in Ihrem Modell haben? Kein Problem. Sie können dieselben Tools verwenden.

Möchten Sie nur ein `str` haben? Oder nur ein `dict`? Oder direkt eine Instanz eines Modells einer Datenbank-Klasse? Es funktioniert alles auf die gleiche Weise.

///

## Mehrere Body-Parameter { #multiple-body-parameters }

Im vorherigen Beispiel erwarteten die *Pfadoperationen* einen JSON-Body mit den Attributen eines `Item`s, etwa:

```JSON
{
    "name": "Foo",
    "description": "The pretender",
    "price": 42.0,
    "tax": 3.2
}
```

Wenn Sie mit der Dokumentation interagieren und die <abbr title="Response – Antwort: Daten, die der Server zum anfragenden Client zurücksendet">Response</abbr> überprüfen, enthält die JSON-Response den Defaultwert (`null`), obwohl der Code nichts in eines der `description`-Felder geschrieben hat:

<div class="screenshot">
<img src="/img/tutorial/separate-openapi-schemas/image02.png">
</div>

pkg bytes, func FieldsFuncSeq([]uint8, func(int32) bool) iter.Seq[[]uint8] #61901
pkg bytes, func FieldsSeq([]uint8) iter.Seq[[]uint8] #61901
pkg bytes, func Lines([]uint8) iter.Seq[[]uint8] #61901
pkg bytes, func SplitAfterSeq([]uint8, []uint8) iter.Seq[[]uint8] #61901
pkg bytes, func SplitSeq([]uint8, []uint8) iter.Seq[[]uint8] #61901
pkg crypto/cipher, func NewCFBDecrypter //deprecated #69445
pkg crypto/cipher, func NewCFBEncrypter //deprecated #69445

        println(request.url)
      }

      client
        .newCall(request)
        .execute()
        .use {
          val firstLine =
            it.body
              .string()
              .lines()
              .first()
          if (this.launch != CommandLine) {
            println("${it.code} ${it.request.url.host} $firstLine")
          }
          Unit
        }
    } catch (e: IOException) {

            this.consumer = consumer;
        }

        @Override
        public void run() {
            new BufferedReader(new InputStreamReader(inputStream, StandardCharsets.UTF_8))
                    .lines()
                    .forEach(consumer);
        }
    }

	// final release step of cat next/*.txt >go1.X.txt.
	// If the files don't end in full lines, the concatenation goes awry.
	if strings.Contains(s, "\r") {
		log.Printf("%s: contains CRLFs", filename)
		exitCode = 1
	}
	if filepath.Base(filename) == "go1.4.txt" {
		// No use for blank lines in api files, except go1.4.txt
		// used them in a reasonable way and we should let it be.