# 请求体 - 多个参数

既然我们已经知道了如何使用 `Path` 和 `Query`，下面让我们来了解一下请求体声明的更高级用法。

## 混合使用 `Path`、`Query` 和请求体参数

首先，毫无疑问地，你可以随意地混合使用 `Path`、`Query` 和请求体参数声明，**FastAPI** 会知道该如何处理。

你还可以通过将默认值设置为 `None` 来将请求体参数声明为可选参数：

//// tab | Python 3.10+

```Python hl_lines="18-20"
{!> ../../docs_src/body_multiple_params/tutorial001_an_py310.py!}
```

////

//// tab | Python 3.9+

```Python hl_lines="18-20"

      }

      override fun canonicalize(s: String): String = s.lowercase()
    },

    PATH {
      override fun urlString(value: String): String = "http://example.com/a${value}z/"

      override fun encodedValue(url: HttpUrl): String {
        val path = url.encodedPath
        return path.substring(2, path.length - 2)
      }

      override operator fun set(
        builder: HttpUrl.Builder,

        public String path;
        public String comment;
        public int state;
        public int num_stores;
        public DfsStorageInfo[] stores;


        @Override
        public void encode ( NdrBuffer _dst ) throws NdrException {
            _dst.align(4);
            _dst.enc_ndr_referent(this.path, 1);
            _dst.enc_ndr_referent(this.comment, 1);

            }
            if (remark != null) {
                _dst = _dst.deferred;
                _dst.enc_ndr_string(remark);

            }
            if (path != null) {
                _dst = _dst.deferred;
                _dst.enc_ndr_string(path);

            }
            if (password != null) {
                _dst = _dst.deferred;
                _dst.enc_ndr_string(password);

            }

///

This parameter doesn't create that endpoint / *path operation*, but declares that the URL `/token` will be the one that the client should use to get the token. That information is used in OpenAPI, and then in the interactive API documentation systems.

We will soon also create the actual path operation.

/// info

    }


    @Override
    protected int writeBytesWireFormat ( byte[] dst, int dstIndex ) {
        int start = dstIndex;
        dst[ dstIndex++ ] = (byte) 0x04;
        dstIndex += writeString(this.path, dst, dstIndex);
        return dstIndex - start;
    }


    @Override
    protected int readParameterWordsWireFormat ( byte[] buffer, int bufferIndex ) {
        return 0;
    }


    @Override

     * @return the share this referral points to
     */
    String getShare ();


    /**
     * @return the number of characters from the unc path that were consumed by this referral
     */
    int getPathConsumed ();


    /**
     * @return the replacement path for this referal
     */
    String getPath ();


    /**
     * @return the expiration time of this entry
     */
    long getExpiration ();

 */
package org.apache.maven.toolchain;

import java.io.File;

import org.apache.maven.toolchain.model.PersistedToolchains;

/**
 * Builds the toolchains model from a previously configured filesystem path to the toolchains file.
 * <strong>Note:</strong> This is an internal component whose interface can change without prior notice.
 *
 * @deprecated use {@link org.apache.maven.toolchain.building.ToolchainsBuilder} instead
 */

Detalles sobre la sintaxis `async def` para *path operation functions* y un poco de información sobre código asíncrono, concurrencia y paralelismo.

## ¿Tienes prisa?

<abbr title="too long; didn't read"><strong>TL;DR:</strong></abbr>

Si estás utilizando libraries de terceros que te dicen que las llames con `await`, del tipo:

```Python
results = await some_library()
```

                throw new CrawlingAccessException("Invalid URL: " + s, e);
            }

            final String path = uri.getPath();
            if (path == null) {
                parent = "/";
                name = null;
            } else {
                final String[] values = path.replaceAll("/+", "/").replaceFirst("/$", "").split("/");
                if (values.length == 1) {
                    parent = "/";