* Il n’a pas besoin d’avoir de code réel, car votre application n’appellera jamais ce code. Il sert uniquement à documenter l’*API externe*. La fonction peut donc simplement contenir `pass`.

{* ../../docs_src/openapi_callbacks/tutorial001_py310.py hl[14:16,19:20,26:30] *}

回调*路径操作*与常规*路径操作*有两点主要区别：

* 它不需要任何实际的代码，因为应用不会调用这段代码。它只是用于存档*外部 API*。因此，函数的内容只需要 `pass` 就可以了
* *路径*可以包含 [OpenAPI 3 表达式](https://github.com/OAI/OpenAPI-Specification/blob/master/versions/3.1.0.md#key-expression)（详见下文），可以使用带参数的变量，以及发送至您的 API 的原始请求的部分

### 回调路径表达式 { #the-callback-path-expression }

        time.sleep(max(final_wait_time, 1))

        self.last_request_start_time = datetime.now(tz=timezone.utc)
        return self

    def __exit__(self, exc_type, exc_val, exc_tb) -> None:
        pass

    def update_request_info(self, cost: int, remaining: int, reset_at: str) -> None:
        self.last_query_cost = cost
        self.remaining_points = remaining

      staticImports = "java.util.Objects.requireNonNull")
  @Deprecated
  public final Comparator<? super R> rowComparator() {
    /*
     * requireNonNull is safe because the factories require non-null Comparators, which they pass on
     * to the backing collections.
     */
    return requireNonNull(rowKeySet().comparator());
  }

  /**
   * Returns the comparator that orders the columns. With natural ordering, {@link

            throws SmbException {
        if (host.indexOf('.') < 0 && host.toUpperCase(Locale.ROOT).equals(host)) {
            // this is not too good, probably should better pass the address and check that it is a netbios one.
            // While we could look up the domain controller/KDC we cannot really make the java kerberos implementation
            // use a KDC of our choice.

        assertDoesNotThrow(() -> outputStream.write(data, 0, -1)); // negative length, returns early
        assertDoesNotThrow(() -> outputStream.write(data, 0, 0)); // zero length, returns early

        // These should pass through to the underlying implementation
        assertDoesNotThrow(() -> outputStream.write(data, 0, 10)); // valid - will consume first mock (10)

        // The normalization removes all duplicate backslashes, so \\\\server becomes \server
        // This test validates that paths which should be UNC but aren't detected due to normalization
        // still pass validation (which is the current behavior, though not ideal)

        // These paths normalize to \server\share which is NOT detected as UNC due to normalization

/// check

So, with the same Python type declaration, **FastAPI** gives you data validation.

Notice that the error also clearly states exactly the point where the validation didn't pass.

This is incredibly helpful while developing and debugging code that interacts with your API.

///

## Documentation { #documentation }

   */

  /*
   * These generators also rely on consecutive integer inputs (not necessarily in order, but no
   * holes).
   */

  // SetCreationTester has some tests that pass in duplicates. Dedup them.
  private static <E extends Comparable<? super E>> SortedSet<E> nullCheckedTreeSet(E[] elements) {
    SortedSet<E> set = newTreeSet();
    for (E element : elements) {

{* ../../docs_src/openapi_callbacks/tutorial001_py310.py hl[14:16,19:20,26:30] *}

일반적인 *경로 처리*와의 주요 차이점은 2가지입니다:

* 실제 코드를 가질 필요가 없습니다. 여러분의 앱은 이 코드를 절대 호출하지 않기 때문입니다. 이는 *external API*를 문서화하는 데만 사용됩니다. 따라서 함수는 그냥 `pass`만 있어도 됩니다.
* *path*에는 [OpenAPI 3 표현식](https://github.com/OAI/OpenAPI-Specification/blob/master/versions/3.1.0.md#key-expression)(자세한 내용은 아래 참고)이 포함될 수 있으며, 이를 통해 *여러분의 API*로 보내진 원래 요청의 파라미터와 일부 값을 변수로 사용할 수 있습니다.