lock.lock();
      try {
        locked.countDown();
        finishLatch.await(1, MINUTES);
      } catch (InterruptedException e) {
        fail(e.toString());
      } finally {
        lock.unlock();
      }
    }

    void waitUntilHoldingLock() throws InterruptedException {
      locked.await(1, MINUTES);
    }

    void releaseLockAndFinish() throws InterruptedException {

      lock.lock();
      try {
        locked.countDown();
        finishLatch.await(1, MINUTES);
      } catch (InterruptedException e) {
        fail(e.toString());
      } finally {
        lock.unlock();
      }
    }

    void waitUntilHoldingLock() throws InterruptedException {
      locked.await(1, MINUTES);
    }

    void releaseLockAndFinish() throws InterruptedException {

        doneSignal.countDown();
      }
    }.start();

    try {
      computingSignal.await();
    } catch (InterruptedException e) {
      throw new RuntimeException(e);
    }

    map.put(one, two);
    assertSame(two, map.get(one));
    startSignal.countDown();

    try {
      doneSignal.await();
    } catch (InterruptedException e) {
      throw new RuntimeException(e);
    }

        doneSignal.countDown();
      }
    }.start();

    try {
      computingSignal.await();
    } catch (InterruptedException e) {
      throw new RuntimeException(e);
    }

    map.put(one, two);
    assertSame(two, map.get(one));
    startSignal.countDown();

    try {
      doneSignal.await();
    } catch (InterruptedException e) {
      throw new RuntimeException(e);
    }

    }

    // 0x4f 0x4b 0x6f 0x6b is "OKok".
    writePing(false, AWAIT_PING, 0x4f4b6f6b)
  }

  /** For testing: awaits a pong. */
  @Throws(InterruptedException::class)
  fun awaitPong() {
    this.withLock {
      while (awaitPongsReceived < awaitPingsSent) {
        condition.await()
      }
    }
  }

  @Throws(IOException::class)
  fun flush() {
    writer.flush()
  }

  /**

    return {"item_id": item_id, "q": q}
```

<details markdown="1">
<summary>Або використайте <code>async def</code>...</summary>

Якщо ваш код використовує `async` / `await`, скористайтеся `async def`:

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

from fastapi import FastAPI

app = FastAPI()


@app.get("/")
async def read_root():

    Wenn Sie eine Auffrischung darüber benötigen, wann welche Anwendung sinnvoll ist, lesen Sie den Abschnitt „In Eile?“ in der Dokumentation zu [`async` und `await`](../async.md#in-eile){.internal-link target=_blank}.

9. Diese *Pfadoperation-Funktion* gibt keine Datenklassen zurück (obwohl dies möglich wäre), sondern eine Liste von Dictionarys mit internen Daten.

## ✍ 📋 🔢

✍ 🔢 🏃 🖥 📋.

⚫️ 🐩 🔢 👈 💪 📨 🔢.

⚫️ 💪 `async def` ⚖️ 😐 `def` 🔢, **FastAPI** 🔜 💭 ❔ 🍵 ⚫️ ☑.

👉 💼, 📋 🔢 🔜 ✍ 📁 (⚖ 📨 📧).

& ✍ 🛠️ 🚫 ⚙️ `async` & `await`, 👥 🔬 🔢 ⏮️ 😐 `def`:

```Python hl_lines="6-9"
{!../../docs_src/background_tasks/tutorial001.py!}
```

## 🚮 🖥 📋

🔘 👆 *➡ 🛠️ 🔢*, 🚶‍♀️ 👆 📋 🔢 *🖥 📋* 🎚 ⏮️ 👩‍🔬 `.add_task()`:

    As always, in FastAPI you can combine `def` and `async def` as needed.

    If you need a refresher about when to use which, check out the section _"In a hurry?"_ in the docs about [`async` and `await`](../async.md#in-a-hurry){.internal-link target=_blank}.

9. This *path operation function* is not returning dataclasses (although it could), but a list of dictionaries with internal data.

  fun takeRequest(): RecordedRequest = requestQueue.take()

  /**
   * Awaits the next HTTP request (waiting up to the specified wait time if necessary), removes it,
   * and returns it. Callers should use this to verify the request was sent as intended within the
   * given time.
   *
   * @param timeout how long to wait before giving up, in units of [unit]