那是因為它沿用了 OpenAPI 規格中的名稱。如此一來，若你要深入查閱這些安全方案，便能直接複製貼上去搜尋更多資訊。

///

變數 `oauth2_scheme` 是 `OAuth2PasswordBearer` 的實例，但同時它也是「可呼叫的」（callable）。

它可以這樣被呼叫：

```Python
oauth2_scheme(some, parameters)
```

因此它可以配合 `Depends` 使用。

### 如何使用 { #use-it }

現在你可以在相依性中傳入 `oauth2_scheme` 與 `Depends` 搭配。

{* ../../docs_src/security/tutorial001_an_py310.py hl[12] *}

这是因为它使用了与 OpenAPI 规范中相同的名称。这样当你需要深入了解这些安全方案时，可以直接复制粘贴去查找更多信息。

///

`oauth2_scheme` 变量是 `OAuth2PasswordBearer` 的一个实例，同时它也是“可调用”的。

可以像这样调用：

```Python
oauth2_scheme(some, parameters)
```

因此，它可以与 `Depends` 一起使用。

### 使用 { #use-it }

现在你可以通过 `Depends` 将 `oauth2_scheme` 作为依赖传入。

{* ../../docs_src/security/tutorial001_an_py310.py hl[12] *}

	_ = w.w.CloseWithError(err)
	_ = w.r.CloseWithError(err)
	w.err = err
}

func (w *writerAt) Close() (err error) {
	switch {
	case len(w.buffer) > 0:
		err = errors.New("some file segments were not flushed from the queue")
		_ = w.w.CloseWithError(err)
	case w.err != nil:
		// No need to close here since both pipes were
		// closing inside TransferError()
		err = w.err
	default:

func (f *formatter) formatString(b []byte, s string) {
	if len(s) > len(b) {
		f.err = ErrFieldTooLong
	}
	copy(b, s)
	if len(s) < len(b) {
		b[len(s)] = 0
	}

	// Some buggy readers treat regular files with a trailing slash
	// in the V7 path field as a directory even though the full path
	// recorded elsewhere (e.g., via PAX record) contains no trailing slash.

   * list with one before {@code index}. Under these circumstances it returns a pair of elements as
   * a {@link MoveDesc}. The first one is the element that was previously at the end of the heap and
   * is now at some position before {@code index}. The second element is the one that was swapped
   * down to replace the element at {@code index}. This fact is used by iterator.remove so as to
   * visit elements during a traversal once and only once.

     */
    @Override
    public String getHostName() {
        /*
         * 2010 - We no longer try a Node Status to get the
         * hostname because apparently some servers do not respond
         * anymore. I think everyone post Windows 98 will accept
         * an IP address as the tconHostName which is the principal
         * use of this method.
         */

     * which was showing transitive inconsistency: since A > B and B > C then we should have A > C
     * otherwise sorting a list of ComparableVersions() will in some cases throw runtime exception;
     * see Netbeans issues <a href="https://netbeans.org/bugzilla/show_bug.cgi?id=240845">240845</a> and
     * <a href="https://netbeans.org/bugzilla/show_bug.cgi?id=226100">226100</a>
     */

首先关注依赖项。

它只是一个函数，且可以接收与*路径操作函数*相同的所有参数：

{* ../../docs_src/dependencies/tutorial001_an_py310.py hl[8:9] *}

大功告成。

**2 行**。

它的形式和结构与所有*路径操作函数*相同。

你可以把它当作没有“装饰器”（没有 `@app.get("/some-path")`）的*路径操作函数*。

而且它可以返回任何你想要的内容。

本例中的依赖项预期接收：

* 类型为 `str` 的可选查询参数 `q`
* 类型为 `int` 的可选查询参数 `skip`，默认值 `0`
* 类型为 `int` 的可选查询参数 `limit`，默认值 `100`

然后它只需返回一个包含这些值的 `dict`。

/// info | 信息

// `len`. The format is subject to change in the future.
// The returned string is heap-allocated, and caller should call free() on it.
//
// Do not return const char*, because some foreign language binding
// (e.g. swift) cannot then call free() on the returned pointer.
TF_CAPI_EXPORT extern char* TF_FunctionDebugString(TF_Function* func,
                                                   size_t* len);

      ListenableFuture<?> unused = serializer.submitAsync(() -> settableFuture, directExecutor());
      for (int i = 0; i < 50_000; i++) {
        if (i % DIRECT_EXECUTIONS_PER_THREAD == 0) {
          // after some number of iterations, switch threads
          unused =
              serializer.submit(
                  () -> {
                    holder.count++;
                    return null;
                  },