Você também pode omitir o tipo de retorno. O FastAPI usará o [`jsonable_encoder`](./encoder.md) para converter os dados e enviá-los.

{* ../../docs_src/server_sent_events/tutorial001_py310.py ln[34:37] hl[35] *}

## `ServerSentEvent` { #serversentevent }

Se você precisar definir campos de SSE como `event`, `id`, `retry` ou `comment`, você pode produzir objetos `ServerSentEvent` em vez de dados simples.

{* ../../docs_src/json_base64_bytes/tutorial001_py310.py ln[1:9,29:35] hl[9] *}

Si vous allez sur les `/docs`, vous verrez que le champ `data` attend des octets encodés en base64 :

<div class="screenshot">
<img src="/img/tutorial/json-base64-bytes/image01.png">
</div>

0000190 b4 69 fc cc cb 72 a6 61 45 f0 d3 1d 26 19 7c 8d
00001a0 29 c8 66 02 be 77 6a f9 3d 34 79 17 19 c8 96 24
00001b0 a3 ac e4 dd 3b 1a 8e c6 fe 96 38 6b bf 67 5a 23
00001c0 f4 16 f4 e6 8a b4 fc c2 cd bf 95 66 1d bb 35 aa
00001d0 92 7d 66 d8 08 8d a5 1f 54 2a af 09 cf 61 ff d2
00001e0 85 9d 8f b6 d7 88 07 4a 86 03 db 64 f3 d9 92 73
00001f0 df ec a7 fc 23 4c 8d 83 79 63 2a d9 fd 8d b3 c8
0000200 8f 7e d4 19 85 e6 8d 1c 76 f0 8b 58 32 fd 9a d6

"2.1 OK"
"2.10 OK"
"2.11 OK"
"2.2 OK"
"2.3 OK"
"2.4 OK"
"2.5 OK"
"2.6 OK"
"2.7 OK"
"2.8 OK"
"2.9 OK"
"3.1 OK"
"3.2 NON-STRICT"
"3.3 NON-STRICT"
"3.4 NON-STRICT"
"3.5 OK"
"3.6 OK"
"3.7 OK"
"4.1.1 OK"
"4.1.2 OK"
"4.1.3 NON-STRICT"
"4.1.4 NON-STRICT"
"4.1.5 OK"
"4.2.1 OK"
"4.2.2 OK"
"4.2.3 NON-STRICT"
"4.2.4 OK"
"4.2.5 OK"
"5.1 OK"
"5.10 OK"

 *
 * <ol>
 *   <li>remove();
 *   <li>hasNext()
 *   <li>hasNext();
 *   <li>remove();
 *   <li>next();
 * </ol>
 *
 * <p>This particular order of operations may be unrealistic, and testing all 3^5 of them may be
 * thought of as overkill; however, it's difficult to determine which proper subset of this massive
 * set would be sufficient to expose any possible bug. Brute force is simpler.
 *

   * enclosed} by both this range and {@code other}.
   *
   * <p>For example,
   *
   * <ul>
   *   <li>{@code [2, 4)} and {@code [5, 7)} are not connected
   *   <li>{@code [2, 4)} and {@code [3, 5)} are connected, because both enclose {@code [3, 4)}
   *   <li>{@code [2, 4)} and {@code [4, 6)} are connected, because both enclose the empty range
   *       {@code [4, 4)}
   * </ul>
   *

 *
 * <ol>
 *   <li>remove();
 *   <li>hasNext()
 *   <li>hasNext();
 *   <li>remove();
 *   <li>next();
 * </ol>
 *
 * <p>This particular order of operations may be unrealistic, and testing all 3^5 of them may be
 * thought of as overkill; however, it's difficult to determine which proper subset of this massive
 * set would be sufficient to expose any possible bug. Brute force is simpler.
 *

    assertThat(
      mergeAdjacentDeltaMappedRanges(
        mutableListOf(
          InlineDelta(1, 5),
          InlineDelta(2, 5),
          InlineDelta(3, 5),
          MappedRange.External(4, "a".encodeUtf8()),
        ),
      ),
    ).containsExactly(
      InlineDelta(1, 5),
      MappedRange.External(4, "a".encodeUtf8()),
    )
  }

   * <p>For example, if {@code rangeMap} had the entries {@code [1, 5] => "foo", (6, 8) => "bar",
   * (10, ∞) => "baz"} then {@code rangeMap.subRangeMap(Range.open(3, 12))} would return a range map
   * with the entries {@code (3, 5] => "foo", (6, 8) => "bar", (10, 12) => "baz"}.
   *
   * <p>The returned range map supports all optional operations that this range map supports, except
   * for {@code asMapOfRanges().iterator().remove()}.
   *

Dönüş tipini belirtmeyebilirsiniz. FastAPI, veriyi dönüştürmek ve göndermek için [`jsonable_encoder`](./encoder.md) kullanır.

{* ../../docs_src/server_sent_events/tutorial001_py310.py ln[34:37] hl[35] *}

## `ServerSentEvent` { #serversentevent }

`event`, `id`, `retry` veya `comment` gibi SSE alanlarını ayarlamanız gerekirse, düz veri yerine `ServerSentEvent` nesneleri yield edebilirsiniz.