---

其他有用的场景是当你想要接收其他类型的键时，例如 `int`。

这也是我们在接下来将看到的。

在下面的例子中，你将接受任意键为 `int` 类型并且值为 `float` 类型的 `dict`：

{* ../../docs_src/body_nested_models/tutorial009_py39.py hl[7] *}

/// tip

请记住 JSON 仅支持将 `str` 作为键。

但是 Pydantic 具有自动转换数据的功能。

这意味着，即使你的 API 客户端只能将字符串作为键发送，只要这些字符串内容仅包含整数，Pydantic 就会对其进行转换并校验。

然后你接收的名为 `weights` 的 `dict` 实际上将具有 `int` 类型的键和 `float` 类型的值。

///

## 总结

class Item(BaseModel):
    name: str
    description: Union[str, None] = None
    price: float
    tax: Union[float, None] = None


@app.put("/items/{item_id}")
async def update_item(
    item_id: int,
    item: Item = Body(
        examples=[
            {
                "name": "Foo",
                "description": "A very nice Item",
                "price": 35.4,
                "tax": 3.2,
            }

@GwtCompatible
public final class CacheBuilder<K, V> {
  private static final int DEFAULT_INITIAL_CAPACITY = 16;
  private static final int DEFAULT_CONCURRENCY_LEVEL = 4;

  @SuppressWarnings("GoodTime") // should be a Duration
  private static final int DEFAULT_EXPIRATION_NANOS = 0;

  @SuppressWarnings("GoodTime") // should be a Duration
  private static final int DEFAULT_REFRESH_NANOS = 0;

@SuppressWarnings("JUnit4ClassUsedInJUnit3")
public class SetHashCodeTester<E> extends AbstractSetTester<E> {
  public void testHashCode() {
    int expectedHashCode = 0;
    for (E element : getSampleElements()) {
      expectedHashCode += (element == null) ? 0 : element.hashCode();
    }
    assertEquals(

 *
 * @deprecated since 4.0.0, use {@link org.apache.maven.api.services} instead
 */
@Deprecated(since = "4.0.0")
public class FileSource implements Source {
    private final Path path;

    private final int hashCode;

    /**
     * Creates a new source backed by the specified file.
     *
     * @param file The file, must not be {@code null}.
     * @deprecated Use {@link #FileSource(Path)} instead.
     */

	public final fun resolvePrivateAddresses ()Z
	public final fun resolvePublicAddresses ()Z
	public final fun url ()Lokhttp3/HttpUrl;
}

public final class okhttp3/dnsoverhttps/DnsOverHttps$Builder {
	public fun <init> ()V
	public final fun bootstrapDnsHosts (Ljava/util/List;)Lokhttp3/dnsoverhttps/DnsOverHttps$Builder;
	public final fun bootstrapDnsHosts ([Ljava/net/InetAddress;)Lokhttp3/dnsoverhttps/DnsOverHttps$Builder;

    }

    static byte[] computeResponse(final byte[] responseKey, final byte[] serverChallenge, final byte[] clientData, final int offset,
            final int length) {
        final MessageDigest hmac = Crypto.getHMACT64(responseKey);
        hmac.update(serverChallenge);
        hmac.update(clientData, offset, length);
        final byte[] mac = hmac.digest();

      }

      @Override
      public byte[] getExpected(byte[] bytes) {
        byte[] baseExpected = factory.getExpected(bytes);
        int startOffset = (int) min(off, baseExpected.length);
        int actualLen = (int) min(len, baseExpected.length - startOffset);
        return Arrays.copyOfRange(baseExpected, startOffset, startOffset + actualLen);
      }

      @Override

            assertEquals(1024, stream.available());

            byte[] readBuffer = new byte[1024];
            int bytesRead = stream.read(readBuffer);

            assertEquals(1024, bytesRead);
            for (int i = 0; i < data.length; i++) {
                assertEquals("Mismatch at position " + i, data[i], readBuffer[i]);
            }
        }
    }

    public Handler(final CIFSContext tc) {
        this.transportContext = tc;
    }

    /**
     * Returns the default HTTP port.
     *
     * @return An <code>int</code> containing the default HTTP port.
     */
    @Override
    protected int getDefaultPort() {
        return DEFAULT_HTTP_PORT;
    }

    @Override
    protected URLConnection openConnection(URL url) throws IOException {