"tax": 3.5
}
```

...由于 `description` 和 `tax` 是可选的（默认值为 `None`），下面的 JSON "object" 也有效：

```JSON
{
    "name": "Foo",
    "price": 45.2
}
```

## 声明为参数 { #declare-it-as-a-parameter }

使用与声明路径和查询参数相同的方式，把它添加至*路径操作*：

{* ../../docs_src/body/tutorial001_py310.py hl[16] *}

...并把其类型声明为你创建的模型 `Item`。

## 结果 { #results }

仅使用这些 Python 类型声明，**FastAPI** 就可以：

* 以 JSON 形式读取请求体。

///

/// check | Testen

Die Parameter `prefix`, `tags`, `responses` und `dependencies` sind (wie in vielen anderen Fällen) nur ein Feature von **FastAPI**, um Ihnen dabei zu helfen, Codeverdoppelung zu vermeiden.

///

        // Verify setup content
        assertEquals(SmbComTransaction.TRANS2_QUERY_PATH_INFORMATION, setupBuffer[0]);
        assertEquals(0x00, setupBuffer[1]);

        // Verify parameter content
        assertEquals(0x0101, SMBUtil.readInt2(paramBuffer, 0));
    }

    @Test
    void testWithMockConfiguration() {
        when(mockConfig.getMinimumVersion()).thenReturn(jcifs.DialectVersion.SMB1);

     */
    @Nonnull
    Optional<Boolean> ignoreTransitiveRepositories();

    /**
     * Specifies "@file"-like file, to load up command line from. It may contain goals as well. Format is one parameter
     * per line (similar to {@code maven.conf}) and {@code '#'} (hash) marked comment lines are allowed. Goals, if
     * present, are appended, to those specified on CLI input, if any.
     */
    Optional<String> atFile();

```

</div>

Open your browser at [http://127.0.0.1:8000](http://127.0.0.1:8000).

There you can set:

* The "Item ID", used in the path.
* The "Token" used as a query parameter.

/// tip

Notice that the query `token` will be handled by a dependency.

///

With that you can connect the WebSocket and then send and receive messages:

No HTTP Basic Auth, a aplicação espera um cabeçalho que contém um usuário e uma senha.

Caso ela não receba, ela retorna um erro HTTP 401 "Unauthorized".

E retorna um cabeçalho `WWW-Authenticate` com o valor `Basic`, e um parâmetro opcional `realm`.

Isso sinaliza ao navegador para mostrar o prompt integrado para um usuário e senha.

Então, quando você digitar o usuário e senha, o navegador os envia automaticamente no cabeçalho.

 *     source-compatible</a> since 4.0)
 */
@GwtCompatible
/*
 * The type parameter is <T> rather than <T extends @Nullable> so that we can use T in the
 * doEquivalent and doHash methods to indicate that the parameter cannot be null.
 */
@SuppressWarnings("UngroupedOverloads")
public abstract class Equivalence<T> {
  /** Constructor for use by subclasses. */

	return nil
}

// RequestProgress - represents elements inside <RequestProgress/> in request XML.
type RequestProgress struct {
	Enabled bool `xml:"Enabled"`
}

// ScanRange represents the ScanRange parameter.
type ScanRange struct {
	// Start is the byte offset to read from (from the start of the file).
	Start *uint64 `xml:"Start"`
	// End is the offset of the last byte that should be returned when Start

    }

    @Test
    public void test_escapeQuery() {
        // Test escaping functionality through escape parameter
        assertEquals("test", getQuery("test", new String[0], Collections.emptyMap(), Collections.emptyMap(), false));
        assertEquals("test", getQuery("test", new String[0], Collections.emptyMap(), Collections.emptyMap(), true));

                                false), QUOTA_EXCEEDED("Quota exceeded", ErrorCategory.RESOURCE, false),

        // Protocol errors
        INVALID_PARAMETER("Invalid parameter", ErrorCategory.PROTOCOL, false), NOT_SUPPORTED("Operation not supported",
                ErrorCategory.PROTOCOL, false), INVALID_PROTOCOL("Invalid protocol", ErrorCategory.PROTOCOL,