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

<details markdown="1">
<summary>⚖️ ⚙️ <code>async def</code>...</summary>

🚥 👆 📟 ⚙️ `async` / `await`, ⚙️ `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"}

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

<details markdown="1">
<summary>או השתמשו ב - <code>async def</code>...</summary>

אם הקוד שלכם משתמש ב - `async` / `await`, השתמשו ב - `async def`:

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

from fastapi import FastAPI

app = FastAPI()


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

  }

  /** A typical timeout value we'll use in the tests. */
  private static final long SMALL_TIMEOUT_MILLIS = 10;

  /** How long to wait when determining that a thread is blocked if we expect it to be blocked. */
  private static final long EXPECTED_HANG_DELAY_MILLIS = 75;

  /**
   * How long to wait when determining that a thread is blocked if we DON'T expect it to be blocked.
   */

				item = madmin.ItemOnline
			} else {
				item = madmin.ItemOffline
			}
			results[i] = Result{
				Endpoint:  c.client.Endpoints[i],
				ItemState: item,
			}
		}(i)
	}
	wg.Wait()

	status := make(map[string]madmin.ItemState, len(results))
	for _, r := range results {
		if r.ItemState == madmin.ItemOnline {
			status[r.Endpoint] = madmin.ItemOnline
		} else {

⚫️ 🚫 🤔. **FastAPI** 🔜 💭 ⚫️❔.

/// note

🚥 👆 🚫 💭, ✅ [🔁: *"🏃 ❓" *](../../async.md){.internal-link target=_blank} 📄 🔃 `async` & `await` 🩺.

///

## 🛠️ ⏮️ 🗄

🌐 📨 📄, 🔬 & 📄 👆 🔗 (& 🎧-🔗) 🔜 🛠️ 🎏 🗄 🔗.

, 🎓 🩺 🔜 ✔️ 🌐 ℹ ⚪️➡️ 👫 🔗 💁‍♂️:

<img src="/img/tutorial/dependencies/image01.png">

## 🙅 ⚙️

    if (!listRead.get() && listRead.compareAndSet(false, true)) {
      readTheListUninterruptibly()
    } else {
      try {
        readCompleteLatch.await()
      } catch (_: InterruptedException) {
        Thread.currentThread().interrupt() // Retain interrupted status.
      }
    }

    check(::publicSuffixListBytes.isInitialized) {

```Python hl_lines="2  12  15-18"
{!../../docs_src/app_testing/tutorial001.py!}
```

/// tip | "豆知識"

テスト関数は `async def` ではなく、通常の `def` であることに注意してください。

また、クライアントへの呼び出しも通常の呼び出しであり、`await` を使用しません。

これにより、煩雑にならずに、`pytest` を直接使用できます。

///

/// note | "技術詳細"

`from starlette.testclient import TestClient` も使用できます。

    long nanosPerSecond = NANOSECONDS.convert(1, SECONDS);
    assertThat(nanosPerSecond * Long.MAX_VALUE).isLessThan(0L);

    // Check that we wait long enough anyway (presumably as long as MAX_VALUE nanos):
    TimedWaiterThread waiter = new TimedWaiterThread(future, Long.MAX_VALUE, SECONDS);
    waiter.start();
    waiter.awaitWaiting();

    future.set(1);

						sm.peerResyncMap[dID] = rs
						wg.Add(1)
						go func() {
							defer wg.Done()
							saveSiteResyncMetadata(ctx, st, newObjectLayerFn())
						}()
					}
				}
				wg.Wait()
				sm.Unlock()
			}
			sTimer.Reset(siteResyncSaveInterval)
		case <-ctx.Done():
			return
		}
	}
}

// update overall site resync state

			targetFailed = true
		} else if tgtSize != tgtCtnt.Size {
			fmt.Printf("unreadable on target - size differs upon read: %s\n", tgtCtnt.Key)
			targetFailed = true
		}
	}()
	wg.Wait()

	sobj.Close()
	tobj.Close()

	if !sourceFailed && !targetFailed {
		ssum := srcSha256.Sum(nil)
		tsum := tgtSha256.Sum(nil)
		allgood = bytes.Equal(ssum, tsum)
		if !allgood {