1. 我们仍然从标准库的 `dataclasses` 导入 `field`。
2. `pydantic.dataclasses` 是 `dataclasses` 的可直接替换版本。
3. `Author` 数据类包含一个由 `Item` 数据类组成的列表。
4. `Author` 数据类被用作 `response_model` 参数。
5. 你可以将其它标准类型注解与数据类一起用作请求体。

   在本例中，它是一个 `Item` 数据类列表。
6. 这里我们返回一个字典，里面的 `items` 是一个数据类列表。

   FastAPI 仍然能够将数据<dfn title="把数据转换为可以传输的格式">序列化</dfn>为 JSON。
7. 这里的 `response_model` 使用了 “`Author` 数据类列表” 的类型注解。

   同样，你可以将 `dataclasses` 与标准类型注解组合使用。

	tok := in.Stack.Next()
	if tok != '\n' {
		in.expectText("expected newline after", directive)
	}
}

func (in *Input) Next() ScanToken {
	if in.peek {
		in.peek = false
		tok := in.peekToken
		in.text = in.peekText
		return tok
	}
	// If we cannot generate a token after 100 macro invocations, we're in trouble.
	// The usual case is caught by Push, below, but be safe.

/**
 * A class to allow {@link ValueGraph} implementations to be backed by a provided delegate. This is
 * not currently planned to be released as a general-purpose forwarding class.
 *
 * @author James Sexton
 * @author Joshua O'Madadhain
 */
abstract class ForwardingValueGraph<N, V> extends AbstractValueGraph<N, V> {

  abstract ValueGraph<N, V> delegate();

  @Override
  public Set<N> nodes() {

 * the License.
 */

package com.google.common.base;

import org.jspecify.annotations.NullUnmarked;

/**
 * Common benchmarking utilities.
 *
 * @author Christopher Swenson
 * @author Louis Wasserman
 */
@NullUnmarked
final class BenchmarkHelpers {
  private static final String WHITESPACE_CHARACTERS =
      "\u00a0\u180e\u202f\t\n\013\f\r \u0085"

import org.codelibs.core.exception.ClIllegalStateException;
import org.codelibs.core.exception.NoSuchAlgorithmRuntimeException;

/**
 * Utility for handling {@link MessageDigest}.
 *
 * @author higa
 * @author shinsuke
 */
public abstract class MessageDigestUtil {

    /**
     * Do not instantiate.
     */
    protected MessageDigestUtil() {
    }

    /**

     */
    protected FilterChain filterChain;

    /**
     * Initializes the query processor after construction.
     * This method creates the initial filter chain from the registered filters.
     * Called automatically by the DI container after bean construction.
     */
    @PostConstruct
    public void init() {
        createFilterChain();
    }

    /**

        // Wipe the password
        authenticator.secureWipePassword();

        // Verify password is cleared after wipe
        char[] passwordAfter = (char[]) passwordField.get(authenticator);
        assertNull(passwordAfter, "Password should be null after wipe");
    }

    @Test
    @DisplayName("Test session ID generation")
    void testSessionIdGeneration() throws Exception {

	case cache.finished() && time.Since(cache.lastHandout) > 5*metacacheMaxClientWait:
		// Keep for 15 minutes after we last saw the client.
		// Since the cache is finished keeping it a bit longer doesn't hurt us.
		return false
	case cache.status == scanStateError || cache.status == scanStateNone:
		// Remove failed listings after 5 minutes.
		return time.Since(cache.lastUpdate) > 5*time.Minute
	}
	return true
}

	}
	left, err := v.UnmarshalMsg(bts)
	if err != nil {
		t.Fatal(err)
	}
	if len(left) > 0 {
		t.Errorf("%d bytes left over after UnmarshalMsg(): %q", len(left), left)
	}

	left, err = msgp.Skip(bts)
	if err != nil {
		t.Fatal(err)
	}
	if len(left) > 0 {
		t.Errorf("%d bytes left over after Skip(): %q", len(left), left)
	}
}

func BenchmarkMarshalMsgPoolDecommissionInfo(b *testing.B) {
	v := PoolDecommissionInfo{}

	}
	left, err := v.UnmarshalMsg(bts)
	if err != nil {
		t.Fatal(err)
	}
	if len(left) > 0 {
		t.Errorf("%d bytes left over after UnmarshalMsg(): %q", len(left), left)
	}

	left, err = msgp.Skip(bts)
	if err != nil {
		t.Fatal(err)
	}
	if len(left) > 0 {
		t.Errorf("%d bytes left over after Skip(): %q", len(left), left)
	}
}

func BenchmarkMarshalMsgBatchJobKeyRotateEncryption(b *testing.B) {