Como se ve en [Devolver una Response directamente](response-directly.md), también puedes sobrescribir el response directamente en tu *path operation*, devolviéndolo.

El mismo ejemplo de arriba, devolviendo una `HTMLResponse`, podría verse así:

{* ../../docs_src/custom_response/tutorial003_py310.py hl[2,7,19] *}

/// warning | Advertencia

 *
 * <p>See the Guava User Guide article on <a
 * href="https://github.com/google/guava/wiki/StringsExplained#splitter">{@code Splitter}</a>.
 *
 * @author Julien Silland
 * @author Jesse Wilson
 * @author Kevin Bourrillion
 * @author Louis Wasserman
 * @since 1.0
 */
@GwtCompatible
public final class Splitter {
  private final CharMatcher trimmer;
  private final boolean omitEmptyStrings;

    server.enqueue(MockResponse())
    val request =
      Request
        .Builder()
        .url(server.url("/"))
        .method("POST", body.toRequestBody(null))
        .build()
    val credential = basic("jesse", "secret")
    client =
      client
        .newBuilder()
        .authenticator(RecordingOkAuthenticator(credential, null))
        .build()
    val response = client.newCall(request).execute()

import junit.framework.TestSuite;
import org.jspecify.annotations.NullMarked;
import org.jspecify.annotations.Nullable;

/**
 * Tests for {@link ImmutableSortedMap}.
 *
 * @author Kevin Bourrillion
 * @author Jesse Wilson
 * @author Jared Levy
 */
@GwtCompatible
@SuppressWarnings("AlwaysThrows")
@NullMarked
public class ImmutableSortedMapTest extends TestCase {
  // TODO: Avoid duplicating code in ImmutableMapTest

# Primeros Pasos { #first-steps }

El archivo FastAPI más simple podría verse así:

{* ../../docs_src/first_steps/tutorial001_py310.py *}

Copia eso en un archivo `main.py`.

Ejecuta el servidor en vivo:

<div class="termy">

```console
$ <font color="#4E9A06">fastapi</font> dev

  <span style="background-color:#009485"><font color="#D3D7CF"> FastAPI </font></span>  Starting development server 🚀

   * test makes a single call with two duplex requests!
   */
  @Test
  fun duplexWithAuthChallenge() {
    enableProtocol(Protocol.HTTP_2)
    val credential = basic("jesse", "secret")
    client =
      client
        .newBuilder()
        .authenticator(RecordingOkAuthenticator(credential, null))
        .build()
    val body1 =
      MockSocketHandler()

  `She can't explain it,' said the Gryphon hastily.  `Go on with
the next verse.'

  `But about his toes?' the Mock Turtle persisted.  `How COULD
he turn them out with his nose, you know?'

  `It's the first position in dancing.' Alice said; but was
dreadfully puzzled by the whole thing, and longed to change the
subject.

  `Go on with the next verse,' the Gryphon repeated impatiently:
`it begins "I passed by his garden."'

Dönüşlerle ya da dönüşsüz (eşzamanlılık) bitirmek aynı zaman alır ve aynı miktarda iş yapmış olursun.

Ama bu durumda, 8 eski kasiyer/aşçı—yeni temizlikçiyi getirip her birine (artı sana) evin bir bölümünü versen, fazladan yardımla tüm işleri **paralel** yaparak çok daha çabuk bitirebilirdin.

Bu senaryoda, her bir temizlikçi (sen dâhil) birer işlemci olur ve kendi iş payını yapar.

La forma en que lo usas es muy sencilla. Por ejemplo, para hacer un `GET` request, escribirías:

```Python
response = requests.get("http://example.com/some/url")
```

La operación de path equivalente en FastAPI podría verse como:

```Python hl_lines="1"
@app.get("/some/url")
def read_url():
    return {"message": "Hello World"}
```

Mira las similitudes entre `requests.get(...)` y `@app.get(...)`.

 *
 * <p>See the Guava User Guide article on <a
 * href="https://github.com/google/guava/wiki/StringsExplained#splitter">{@code Splitter}</a>.
 *
 * @author Julien Silland
 * @author Jesse Wilson
 * @author Kevin Bourrillion
 * @author Louis Wasserman
 * @since 1.0
 */
@GwtCompatible
public final class Splitter {
  private final CharMatcher trimmer;
  private final boolean omitEmptyStrings;