You might notice that to create an instance of a Python class, you use that same syntax.

For example:

```Python
class Cat:
    def __init__(self, name: str):
        self.name = name


fluffy = Cat(name="Mr Fluffy")
```

In this case, `fluffy` is an instance of the class `Cat`.

And to create `fluffy`, you are "calling" `Cat`.

So, a Python class is also a **callable**.

### 查看文档

如果主文件是 `main.py`，则用以下 `uvicorn` 命令运行主应用：

<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)
```

</div>

查看文档 <a href="http://127.0.0.1:8000/docs" class="external-link" target="_blank">http://127.0.0.1:8000/docs。</a>

下图显示的是主应用 API 文档，只包括其自有的*路径操作*。

### Eingabemodell in der Dokumentation { #input-model-in-docs }

Sie können überprüfen, dass das Feld `description` in der Dokumentation kein **rotes Sternchen** enthält, es ist nicht als erforderlich markiert:

<div class="screenshot">
<img src="/img/tutorial/separate-openapi-schemas/image01.png">
</div>

### Modell für die Ausgabe { #model-for-output }

Wenn Sie jedoch dasselbe Modell als Ausgabe verwenden, wie hier:

import org.eclipse.aether.metadata.Metadata;

/**
 * <strong>Warning:</strong> This is an internal utility class that is only public for technical reasons, it is not part
 * of the public API. In particular, this class can be changed or deleted without prior notice.
 *
 */
@Deprecated
public final class MetadataBridge extends AbstractMetadata implements MergeableMetadata {

    private ArtifactMetadata metadata;

        RepositorySystemSession session = Mockito.mock(RepositorySystemSession.class);
        TransferListener delegate = Mockito.mock(TransferListener.class);
        SimplexTransferListener listener = new SimplexTransferListener(delegate);

        TransferEvent transferInitiatedEvent = event(session, resource, TransferEvent.EventType.INITIATED);

pkg debug/dwarf, const ClassLocListPtr = 7
pkg debug/dwarf, const ClassLocListPtr Class
pkg debug/dwarf, const ClassMacPtr = 8
pkg debug/dwarf, const ClassMacPtr Class
pkg debug/dwarf, const ClassRangeListPtr = 9
pkg debug/dwarf, const ClassRangeListPtr Class
pkg debug/dwarf, const ClassReference = 10
pkg debug/dwarf, const ClassReference Class
pkg debug/dwarf, const ClassReferenceAlt = 13
pkg debug/dwarf, const ClassReferenceAlt Class

import org.codehaus.plexus.component.repository.exception.ComponentLookupException;
import org.codehaus.plexus.logging.Logger;

/**
 * DefaultProfileManager
 */
@Deprecated
public class DefaultProfileManager implements ProfileManager {

    @Inject
    private Logger logger;

    @Inject
    private ProfileSelector profileSelector;

    private List<String> activatedIds = new ArrayList<>();

 * technical reasons, it is not part of the public API. In particular, this interface can be changed or deleted without
 * prior notice.
 *
 * @since 3.0
 */
@Named
@Singleton
public class DefaultPluginDescriptorCache implements PluginDescriptorCache {

    private Map<Key, PluginDescriptor> descriptors = new ConcurrentHashMap<>(128);
    private Map<Key, Key> keys = new ConcurrentHashMap<>();

    @Override

/// tip | 팁

사용자 정의 헤더는 <a href="https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers" class="external-link" target="_blank">'X-' 접두사를 사용</a>하여 추가할 수 있습니다.

그러나 만약 클라이언트의 브라우저에서 볼 수 있는 사용자 정의 헤더를 가지고 있다면, 그것들을 CORS 설정([CORS (Cross-Origin Resource Sharing)](cors.md){.internal-link target=_blank})에 <a href="https://www.starlette.dev/middleware/#corsmiddleware" class="external-link" target="_blank">Starlette CORS 문서</a>에 명시된 `expose_headers` 매개변수를 이용하여 헤더들을 추가하여야합니다.

/// info | Información

`status_code` también puede recibir un `IntEnum`, como por ejemplo el <a href="https://docs.python.org/3/library/http.html#http.HTTPStatus" class="external-link" target="_blank">`http.HTTPStatus`</a> de Python.

///

Esto hará:

* Devolver ese código de estado en el response.