Detalles sobre la sintaxis `async def` para *path operation functions* y algunos antecedentes sobre el código asíncrono, la concurrencia y el paralelismo.

## ¿Con prisa? { #in-a-hurry }

<abbr title="too long; didn't read"><strong>TL;DR:</strong></abbr>

Si estás usando paquetes de terceros que te dicen que los llames con `await`, como:

```Python
results = await some_library()
```

    /**
     * Returns the plugin context for mojo being executed and the specified
     * {@link Project}, never returns {@code null} as if context not present, creates it.
     *
     * <strong>Implementation note:</strong> while this method return type is {@link Map}, the
     * returned map instance implements {@link java.util.concurrent.ConcurrentMap} as well.
     *

       * only if this iterator passed across threads,
       * which we don't support anyway.
       */
      return nextIndex >= 0;
    }

    /**
     * Checks whether nextIndex is valid; if so setting nextItem. Stops iterator when either hits
     * putIndex or sees null item.
     */
    private void checkNext() {
      if (nextIndex == putIndex) {
        nextIndex = -1;
        nextItem = null;

  // caller of event_mgr->ThenExecute() blocks on the completion of the callback
  // (as in the case of ConstOp kernel creation on GPU, which involves copying a
  // CPU tensor to GPU).
  // Setting a larger thread pool does not help with the Swift caller, as we use
  // a different TFE context for each thread of execution (for running graph
  // functions, and their send/recvs corountines).

     * If null, all available data configurations will be crawled (when no other config IDs are specified).
     */
    protected String[] dataConfigIds;

    /**
     * Document expiration setting in days.
     * -2: use system default, -1: never expire, 0 or positive: expire after specified days.
     */
    protected int documentExpires = -2;

    /**
     * Hot thread monitoring interval in seconds.

          }
        }

        // SETTINGS_MAX_HEADER_LIST_SIZE
        6 -> { // Advisory only, so ignored.
        }

        // Must ignore setting with unknown id.
        else -> {
        }
      }
      settings[id] = value
    }
    handler.settings(false, settings)
  }

  @Throws(IOException::class)
  private fun readPushPromise(

```

</div>

Ответ будет примерно таким:

```JSON
{
    "message": "Hello World",
    "root_path": "/api/v1"
}
```

### Установка `root_path` в приложении FastAPI { #setting-the-root-path-in-the-fastapi-app }

Если нет возможности передать опцию командной строки `--root-path` (или аналог), вы можете указать параметр `root_path` при создании приложения FastAPI:

   * #MANY_VALUES_MEAN} and the sum-of-squares-of-deltas is {@link
   * #MANY_VALUES_SUM_OF_SQUARES_OF_DELTAS}. The smallest and largest finite values are always
   * {@link #MANY_VALUES_MIN} and {@link #MANY_VALUES_MAX}, although setting non-finite values will
   * change the true min and max.
   */
  static class ManyValues {

    private final ImmutableList<Double> values;

    ManyValues(double[] values) {

// If block is false, Read and Write will return ErrIsEmpty or ErrIsFull immediately.
// By default, the ring buffer is not blocking.
// This setting should be called before any Read or Write operation or after a Reset.
func (r *RingBuffer) SetBlocking(block bool) *RingBuffer {
	r.block = block
	if block {
		r.readCond = sync.NewCond(&r.mu)

	}

	// Testing the response for Invalid AccessID.
	// Forcing the signature check to fail.
	rec = httptest.NewRecorder()
	// construct HTTP request for NewMultipart upload.
	// Setting an invalid accessID.
	req, err = newTestSignedRequestV4(http.MethodPost, getNewMultipartURL("", bucketName, objectName),
		0, nil, "Invalid-AccessID", credentials.SecretKey, nil)
	if err != nil {