Это всё не важно. **FastAPI** знает, что нужно сделать. 😎

/// note | "Информация"

Если вам эта тема не знакома, прочтите [Async: *"In a hurry?"*](../../async.md){.internal-link target=_blank} раздел о `async` и `await` в документации.

///

## Интеграция с OpenAPI

Все заявления о запросах, валидаторы, требования ваших зависимостей (и подзависимостей) будут интегрированы в соответствующую OpenAPI-схему.

def read_item(item_id: int, q: Union[str, None] = None):
    return {"item_id": item_id, "q": q}
```

<details markdown="1">
<summary>Tàbí lò <code>async def</code>...</summary>

Tí kóòdù rẹ̀ bá ń lò `async` / `await`, lò `async def`:

```Python hl_lines="9  14"
from typing import Union

from fastapi import FastAPI

app = FastAPI()


@app.get("/")
async def read_root():
    return {"Hello": "World"}

Es spielt keine Rolle. **FastAPI** weiß, was zu tun ist.

/// note | "Hinweis"

Wenn Ihnen das nichts sagt, lesen Sie den [Async: *„In Eile?“*](../../async.md#in-eile){.internal-link target=_blank}-Abschnitt über `async` und `await` in der Dokumentation.

///

## Integriert in OpenAPI

Alle Requestdeklarationen, -validierungen und -anforderungen Ihrer Abhängigkeiten (und Unterabhängigkeiten) werden in dasselbe OpenAPI-Schema integriert.

/// tip | "Tipp"

Beachten Sie, dass wir, da wir Standard-`open()` verwenden, welches `async` und `await` nicht unterstützt, hier die Pfadoperation mit normalen `def` deklarieren.

///

### `FileResponse`

Streamt eine Datei asynchron als Response.

///

### 🔃 `def` 🆚 `async def`

📥 👥 ⚙️ 🇸🇲 📟 🔘 *➡ 🛠️ 🔢* & 🔗, &, 🔄, ⚫️ 🔜 🚶 & 🔗 ⏮️ 🔢 💽.

👈 💪 ⚠ 🚚 "⌛".

✋️ 🇸🇲 🚫 ✔️ 🔗 ⚙️ `await` 🔗, 🔜 ⏮️ 🕳 💖:

```Python
user = await db.query(User).first()
```

...& ↩️ 👥 ⚙️:

```Python
user = db.query(User).first()
```

⤴️ 👥 🔜 📣 *➡ 🛠️ 🔢* & 🔗 🍵 `async def`, ⏮️ 😐 `def`,:

/// tip

Notice that here as we are using standard `open()` that doesn't support `async` and `await`, we declare the path operation with normal `def`.

///

### `FileResponse`

Asynchronously streams a file as the response.

Takes a different set of arguments to instantiate than the other response types:

      futures.add(
          executor.submit(
              new Callable<@Nullable Void>() {
                @Override
                public @Nullable Void call() throws Exception {
                  barrier.await();
                  Integer first = graph.nodes().iterator().next();
                  for (Integer node : graph.nodes()) {
                    Set<Integer> unused = graph.successors(node);
                  }

                } else {
                    latch.countDown();
                }
            }
            try {
                latch.await();
            } catch (InterruptedException e) {
                result.addErrorArtifactException(
                        new ArtifactResolutionException("Resolution interrupted", rootArtifact, e));
            }

아무 문제 없습니다. **FastAPI**는 무엇을 할지 알고 있습니다.

/// note | "참고"

잘 모르시겠다면, [Async: *"In a hurry?"*](../../async.md){.internal-link target=_blank} 문서에서 `async`와 `await`에 대해 확인할 수 있습니다.

///

## OpenAPI와 통합

모든 요청 선언, 검증과 의존성(및 하위 의존성)에 대한 요구 사항은 동일한 OpenAPI 스키마에 통합됩니다.

따라서 대화형 문서에 이러한 의존성에 대한 모든 정보 역시 포함하고 있습니다:

				throw new Error("total length of command line and environment variables exceeds limit");
			}

			this._inst.exports.run(argc, argv);
			if (this.exited) {
				this._resolveExitPromise();
			}
			await this._exitPromise;
		}

		_resume() {
			if (this.exited) {
				throw new Error("Go program has already exited");
			}
			this._inst.exports.resume();
			if (this.exited) {