![ReDoc](https://fastapi.tiangolo.com/img/index/index-02-redoc-simple.png)

### OpenAPI

**FastAPI** generiert ein „Schema“ mit all Ihren APIs unter Verwendung des **OpenAPI**-Standards zur Definition von APIs.

#### „Schema“

Ein „Schema“ ist eine Definition oder Beschreibung von etwas. Nicht der eigentliche Code, der es implementiert, sondern lediglich eine abstrakte Beschreibung.

        return asStream(id)//
                .header("Pragma", "no-cache")//
                .header("Cache-Control", "no-cache")//
                .header("Expires", "Thu, 01 Dec 1994 16:00:00 GMT")//
                .header("Content-Type", "application/x-ndjson")//
                .stream(out -> {

	ReplicationState           ReplicationState
	DeleteMarker               bool

	OpType               replication.Type
	EventType            string
	RetryCount           uint32
	ResetID              string
	Dsc                  ReplicateDecision
	ExistingObjResync    ResyncDecision
	TargetArn            string
	TargetStatuses       map[string]replication.StatusType
	TargetPurgeStatuses  map[string]VersionPurgeStatusType

				})
				if err != nil {
					return nil, err
				}
			}
			if ndjson {
				return buf.Bytes(), nil
			}
			var msi map[string]interface{}
			dec := json.NewDecoder(buf)
			// Use number to preserve integers.
			dec.UseNumber()
			err = dec.Decode(&msi)
			if err != nil {
				return nil, err
			}
			b, err = json.MarshalIndent(msi, "", "  ")
			if err != nil {
				return nil, err
			}

///

```Python hl_lines="10"
{!> ../../docs_src/path_params_numeric_validations/tutorial001.py!}
```

////

/// note | "Hinweis"

Ein Pfad-Parameter ist immer erforderlich, weil er Teil des Pfads sein muss.

Sie sollten ihn daher mit `...` deklarieren, um ihn als erforderlich auszuzeichnen.

second_user_data = {
    "id": 4,
    "name": "Mary",
    "joined": "2018-11-30",
}

my_second_user: User = User(**second_user_data)
```

/// info

`**second_user_data` bedeutet:

   */
  public static final String SEC_CH_DPR = "Sec-CH-DPR";
  /**
   * The HTTP <a href="https://w3c.github.io/webappsec-fetch-metadata/">{@code Sec-Fetch-Dest}</a>
   * header field name.
   *
   * @since 27.1
   */
  public static final String SEC_FETCH_DEST = "Sec-Fetch-Dest";
  /**
   * The HTTP <a href="https://w3c.github.io/webappsec-fetch-metadata/">{@code Sec-Fetch-Mode}</a>
   * header field name.
   *

				"audio/vnd.sealedmedia.softseal.mpeg",
				"audio/vnd.vmx.cvsd",
				"audio/vorbis-config",
				"audio/x-aac",
				"audio/x-adbcm",
				"audio/x-aiff",
				"audio/x-dec-basic",
				"audio/x-dec-adbcm",
				"audio/x-flac",
				"audio/x-mod",
				"audio/x-mpegurl",
				"audio/x-ms-wax",
				"audio/x-ms-wma",
				"audio/x-pn-realaudio",
				"audio/x-pn-realaudio-plugin",

   * interpretation of a limited number of contiguously following characters.
   *
   * @since 8.0
   */
  public static final byte ESC = 27;

  /**
   * File Separator: These four information separators may be used within data in optional fashion,
   * except that their hierarchical relationship shall be: FS is the most inclusive, then GS, then

	if err != nil {
		return nil, err
	}
	dec := gob.NewDecoder(respBody)
	ch := make(chan madmin.ReplicationMRF)
	go func(ch chan madmin.ReplicationMRF) {
		defer func() {
			xhttp.DrainBody(respBody)
			close(ch)
		}()
		for {
			var entry madmin.ReplicationMRF
			if err := dec.Decode(&entry); err != nil {
				return
			}
			select {
			case <-ctx.Done():