{* ../../docs_src/custom_response/tutorial007_py310.py hl[3,16] *}

/// note | 技術詳細

`async` タスクは `await` に到達したときにのみキャンセルできます。`await` がない場合、ジェネレータ（`yield` を持つ関数）は適切にキャンセルできず、キャンセル要求後も実行が続く可能性があります。

この小さな例では `await` が不要なため、イベントループにキャンセルを処理する機会を与えるために `await anyio.sleep(0)` を追加しています。

これは大きなストリームや無限ストリームではさらに重要になります。

///

/// tip | 豆知識

    val dispatcher: Dispatcher =
      object : Dispatcher() {
        override fun dispatch(request: RecordedRequest): MockResponse {
          if (request.url.encodedPath == firstRequest) {
            latch.await()
          }
          return MockResponse()
        }
      }
    mockWebServer.dispatcher = dispatcher
    val startsFirst = buildRequestThread(firstRequest, firstResponseCode)
    startsFirst.start()

with open("file.txt") as file:
    file.read()
```

Em versões mais recentes do Python, há também um **gerenciador de contexto assíncrono**. Você o usaria com `async with`:

```Python
async with lifespan(app):
    await do_stuff()
```

		args+=("http://localhost:$((start_port + i))${WORK_DIR}/mnt/disk$i/ ")
	done

	for i in $(seq 1 4); do
		"${MINIO[@]}" --address ":$((start_port + i))" ${args[@]} 2>&1 >"${WORK_DIR}/server$i.log" &
	done

	# Wait until all nodes return 403
	for i in $(seq 1 4); do
		while [ "$(curl -m 1 -s -o /dev/null -w "%{http_code}" http://localhost:$((start_port + i)))" -ne "403" ]; do
			echo -n "."
			sleep 1
		done
	done

}

    }

    @Test
    public void test_setCrawlerWaitMillis() {
        IntervalControlHelper helper = new IntervalControlHelper();

        // Test default wait time
        assertEquals(10000, helper.crawlerWaitMillis);

        // Test setting new wait time
        helper.setCrawlerWaitMillis(5000);
        assertEquals(5000, helper.crawlerWaitMillis);

        helper.setCrawlerWaitMillis(0);

         'msys2.tar.xz'); \
    Start-Process -FilePath \"C:\Program Files\7-Zip\7z.exe\" -ArgumentList 'x msys2.tar.xz -oC:\TEMP\msys2.tar' -Wait; \
    Start-Process -FilePath \"C:\Program Files\7-Zip\7z.exe\" -ArgumentList 'x C:\TEMP\msys2.tar -oC:\tools' -Wait; \
    $env:PATH = [Environment]::GetEnvironmentVariable('PATH', 'Machine') + ';C:\tools\msys64;C:\tools\msys64\usr\bin\'; \

   * numElements} elements are not available, it will wait for them up to the specified timeout.
   *
   * @param q the blocking queue to be drained
   * @param buffer where to add the transferred elements
   * @param numElements the number of elements to be waited for
   * @param timeout how long to wait before giving up
   * @return the number of elements transferred

```Python
with open("file.txt") as file:
    file.read()
```

En versiones recientes de Python, también hay un **async context manager**. Lo usarías con `async with`:

```Python
async with lifespan(app):
    await do_stuff()
```

	export MC_HOST_myminio="http://minio:minio123@127.0.0.1:$((start_port + 1))"

	timeout 15m /tmp/mc ready myminio || fail

	# Wait for all drives to be online and formatted
	while [ $(/tmp/mc admin info --json myminio | jq '.info.servers[].drives[].state | select(. != "ok")' | wc -l) -gt 0 ]; do sleep 1; done
	# Wait for all drives to be healed

	// Handler goroutine.
	var handlerErr atomic.Pointer[RemoteErr]
	go func() {
		wg.Wait()
		defer xioutil.SafeClose(send)
		err := m.handleRequests(ctx, msg, send, handler, handlerIn)
		if err != nil {
			handlerErr.Store(err)
		}
	}()

	// Response sender goroutine...
	go func(outBlock <-chan struct{}) {
		wg.Wait()
		defer m.parent.deleteMux(true, m.ID)
		m.sendResponses(ctx, send, c, &handlerErr, outBlock)