---

"_If you're looking to learn one **modern framework** for building REST APIs, check out **FastAPI** [...] It's fast, easy to use and easy to learn [...]_"

"_We've switched over to **FastAPI** for our **APIs** [...] I think you'll like it [...]_"

---

"_If you're looking to learn one **modern framework** for building REST APIs, check out **FastAPI** [...] It's fast, easy to use and easy to learn [...]_"

"_We've switched over to **FastAPI** for our **APIs** [...] I think you'll like it [...]_"

			return err
		}
		return nil
	}
	versionCmd.Example = `  # Retrieve version information directly from the control plane, using token security
  # (This is the usual way to get the control plane version with an out-of-cluster control plane.)
  istioctl x version --xds-address istio.cloudprovider.example.com:15012

  # Retrieve version information via Kubernetes config, using token security

# o applicationBehaviorMap: (NotRequired - Default map:{})
# o outputPackageAdjustmentMap: (NotRequired - Default map:{})
# o dbfluteSystemFinalTimeZone: (NotRequired - Default null)
#
# *The line that starts with '#' means comment-out.
#
map:{
    # /- - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
    # o database: (Required)
    #  This is the target database, only considered when generating
    #  the SQL for your DBFlute project.

          .url(server!!.url("/"))
          .build(),
      )
    assertFailsWith<IOException> {
      call.execute()
    }.also { expected ->
      assertThat(expected.message).isIn("timeout", "Read timed out")
    }
    assertThat(listener.recordedEventTypes()).containsExactly(
      "ConnectStart",
      "ConnectEnd",
      "ConnectionAcquired",
      "NoNewExchanges",
      "ConnectionReleased",

                context.terminal
                        .writer()
                        .println(messageBuilderFactory
                                .builder()
                                .info("Writing out the configuration...")
                                .build());
                secDispatcher.writeConfiguration(config);
            } else {
                context.terminal
                        .writer()

{!> ../../docs_src/websockets/tutorial003_py39.py!}
```

////

//// tab | Python 3.8+

```Python hl_lines="81-83"
{!> ../../docs_src/websockets/tutorial003.py!}
```

////

To try it out:

* Open the app with several browser tabs.
* Write messages from them.
* Then close one of the tabs.

That will raise the `WebSocketDisconnect` exception, and all the other clients will receive a message like:

  //  2. If it's a kubelet serving certificate, it is assigned
  //     "kubernetes.io/kubelet-serving".
  //  3. Otherwise, it is assigned "kubernetes.io/legacy-unknown".
  // Distribution of trust for signers happens out of band.
  // You can select on this field using `spec.signerName`.
  // +optional
  optional string signerName = 7;

  // expirationSeconds is the requested duration of validity of the issued

   *     take any event class.
   * @param elapsedMs the time in milliseconds elapsed since the immediately-preceding event, or
   *     -1L to take any duration.
   */
  fun takeEvent(
    eventClass: Class<out CallEvent>? = null,
    elapsedMs: Long = -1L,
  ): CallEvent {
    val result = eventSequence.remove()
    val actualElapsedNs = result.timestampNs - (lastTimestampNs ?: result.timestampNs)

   *     less than {@link Byte#MIN_VALUE}
   */
  public static byte checkedCast(long value) {
    byte result = (byte) value;
    checkArgument(result == value, "Out of range: %s", value);
    return result;
  }

  /**
   * Returns the {@code byte} nearest in value to {@code value}.
   *
   * @param value any {@code long} value