{!> ../../docs_src/python_types/tutorial009b_py39.py!}
```

////

#### Uso de `Union` u `Optional` { #using-union-or-optional }

Si estás usando una versión de Python inferior a 3.10, aquí tienes un consejo desde mi punto de vista muy **subjetivo**:

* 🚨 Evita usar `Optional[SomeType]`
* En su lugar ✨ **usa `Union[SomeType, None]`** ✨.

contributions, often because we probably won't get to them right now. If you
decide to start on an issue, leave a comment so that other people know that
you're working on it. If you want to help out, but not alone, use the issue
comment thread to coordinate.

### Contribution guidelines and standards

Before sending your pull request for

		writeErrorResponseJSON(ctx, w, errorCodes.ToAPIErr(ErrAdminConfigTooLarge), r.URL)
		return
	}

	// Ensure body content type is opaque to ensure that request body has not
	// been interpreted as form data.
	contentType := r.Header.Get("Content-Type")
	if contentType != "application/octet-stream" {
		writeErrorResponseJSON(ctx, w, errorCodes.ToAPIErr(ErrBadRequest), r.URL)
		return
	}

    new EqualsTester()
        .addEqualityGroup(
            comparator, DECREASING_INTEGER.onResultOf(StringLengthFunction.STRING_LENGTH))
        .addEqualityGroup(DECREASING_INTEGER.onResultOf(Functions.constant(1)))
        .addEqualityGroup(Ordering.natural())
        .testEquals();
    reserializeAndAssert(comparator);
    assertEquals("Ordering.natural().reverse().onResultOf(STRING_LENGTH)", comparator.toString());
  }

    new EqualsTester()
        .addEqualityGroup(
            comparator, DECREASING_INTEGER.onResultOf(StringLengthFunction.STRING_LENGTH))
        .addEqualityGroup(DECREASING_INTEGER.onResultOf(Functions.constant(1)))
        .addEqualityGroup(Ordering.natural())
        .testEquals();
    reserializeAndAssert(comparator);
    assertEquals("Ordering.natural().reverse().onResultOf(STRING_LENGTH)", comparator.toString());
  }

# FastAPI

<style>
.md-content .md-typeset h1 { display: none; }
</style>

<p align="center">
  <a href="https://fastapi.tiangolo.com"><img src="https://fastapi.tiangolo.com/img/logo-margin/logo-teal.png" alt="FastAPI"></a>
</p>
<p align="center">
    Framework FastAPI, haute performance, facile à apprendre, rapide à coder, prêt pour la production
</p>
<p align="center">

         * The network name of the share.
         */
        public String netname;
        /**
         * The type of the share.
         */
        public int type;
        /**
         * A comment or description of the share.
         */
        public String remark;

        @Override
        public void encode(NdrBuffer _dst) throws NdrException {
            _dst.align(4);

### Async Context Manager { #async-context-manager }

Si revisas, la función está decorada con un `@asynccontextmanager`.

Eso convierte a la función en algo llamado un "**async context manager**".

{* ../../docs_src/events/tutorial003_py39.py hl[1,13] *}

 * validating constants.
 */
public class SmbConstantsTest {

    /**
     * Verify that the hard‑coded default values are present.
     */
    @Test
    @DisplayName("Default constant values match expectations")
    void defaultValues() {
        assertEquals(445, SmbConstants.DEFAULT_PORT);
        assertEquals(10, SmbConstants.DEFAULT_MAX_MPX_COUNT);

        // Arrange
        doThrow(new SmbException("login failed")).when(tree).connectLogon(context);

        // Act + Assert
        SmbException ex = assertThrows(SmbException.class, () -> tree.connectLogon(context));
        assertEquals("login failed", ex.getMessage());
        verify(tree).connectLogon(context);
    }

    @Test
    @DisplayName("send without params returns the stubbed response")