FIRST,
    SECOND,
    THIRD;
  }

  // Given a sequence of lock acquisition descriptions
  // (e.g. "LockA -> LockB", "LockB -> LockC", ...)
  // Checks that the exception.getMessage() matches a regex of the form:
  // "LockA -> LockB \b.*\b LockB -> LockC \b.*\b LockC -> LockA"
  private void checkMessage(IllegalStateException exception, String... expectedLockCycle) {
    String regex = Joiner.on("\\b.*\\b").join(expectedLockCycle);

有關更多功能的完整範例，可以參考 <a href="https://fastapi.tiangolo.com/tutorial/">教學 - 使用者指南</a>。

**劇透警告**： 教學 - 使用者指南內容有：

- 對來自不同地方的**參數**進行宣告：像是 **headers**, **cookies**, **form 表單**以及**上傳檔案**。
- 如何設定 **驗證限制** 像是 `maximum_length` or `regex`。
- 簡單且非常容易使用的 **<abbr title="也被稱為元件、資源、提供者、服務或是注入">依賴注入</abbr>** 系統。
- 安全性和身份驗證，包含提供支援 **OAuth2**、**JWT tokens** 和 **HTTP Basic** 驗證。

     * If no DACL is present, null is returned. If the DACL is empty, an array with 0 elements is returned.
     * 
     * @param resolveSids
     *            Attempt to resolve the SIDs within each ACE form
     *            their numeric representation to their corresponding account names.
     * @return array of ACEs
     * @throws IOException
     */
    ACE[] getSecurity ( boolean resolveSids ) throws IOException;

   *
   * 4. Different values
   *
   * ```
   * Content-Type: text/html
   * Content-Length: 050
   * ```
   *
   * Applications that require semantically equal headers should convert them into a canonical form
   * before comparing them for equality.
   */
  override fun equals(other: Any?): Boolean = commonEquals(other)

  override fun hashCode(): Int = commonHashCode()

  /**

///

```Python hl_lines="8-11"
{!> ../../docs_src/dependencies/tutorial001.py!}
```

////

Das war's schon.

**Zwei Zeilen**.

Und sie hat die gleiche Form und Struktur wie alle Ihre *Pfadoperation-Funktionen*.

Sie können sie sich als *Pfadoperation-Funktion* ohne den „Dekorator“ (ohne `@app.get("/some-path")`) vorstellen.

Und sie kann alles zurückgeben, was Sie möchten.

  @Override
  public String toString() {
    return asMapOfRanges().toString();
  }

  /**
   * This class is used to serialize ImmutableRangeMap instances. Serializes the {@link
   * #asMapOfRanges()} form.
   */
  private static class SerializedForm<K extends Comparable<?>, V> implements Serializable {

    private final ImmutableMap<Range<K>, V> mapOfRanges;

            log.error("Failed to create builtin SIDs", se);
        }
    }


    /**
     * Convert a sid_t to byte array
     * 
     * @param sid
     * @return byte encoded form
     */
    public static byte[] toByteArray ( rpc.sid_t sid ) {
        byte[] dst = new byte[1 + 1 + 6 + sid.sub_authority_count * 4];
        int di = 0;
        dst[ di++ ] = sid.revision;

        LockFreeBitArray bits);

    /**
     * Identifier used to encode this strategy, when marshalled as part of a BloomFilter. Only
     * values in the [-128, 127] range are valid for the compact serial form. Non-negative values
     * are reserved for enums defined in BloomFilterStrategies; negative values are reserved for any
     * custom, stateful strategy we may define (e.g. any kind of strategy that would depend on user

 * </ul>
 *
 * <p>There are deviations from this if there are failures or if {@link Service#stopAsync} is called
 * before the {@link Service} reaches the {@linkplain State#RUNNING RUNNING} state. The set of legal
 * transitions form a <a href="http://en.wikipedia.org/wiki/Directed_acyclic_graph">DAG</a>,
 * therefore every method of the listener will be called at most once. N.B. The {@link State#FAILED}

/// info | "说明"

`OAuth2PasswordRequestForm` 与 `OAuth2PasswordBearer` 一样，都不是 FastAPI 的特殊类。

**FastAPI** 把 `OAuth2PasswordBearer` 识别为安全方案。因此，可以通过这种方式把它添加至 OpenAPI。

但 `OAuth2PasswordRequestForm` 只是可以自行编写的类依赖项，也可以直接声明 `Form` 参数。

但由于这种用例很常见，FastAPI 为了简便，就直接提供了对它的支持。

///

### 使用表单数据

/// tip | "提示"

`OAuth2PasswordRequestForm` 类依赖项的实例没有以空格分隔的长字符串属性 `scope`，但它支持 `scopes` 属性，由已发送的 scope 字符串列表组成。