Es könnte wie folgt aufgerufen werden:

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

Es kann also mit `Depends` verwendet werden.

### Verwenden { #use-it }

Jetzt können Sie dieses `oauth2_scheme` als Abhängigkeit `Depends` übergeben.

{* ../../docs_src/security/tutorial001_an_py39.py hl[12] *}

///

`oauth2_scheme` 变量是 `OAuth2PasswordBearer` 的实例，也是**可调用项**。

以如下方式调用：

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

因此，`Depends` 可以调用 `oauth2_scheme` 变量。

### 使用

接下来，使用 `Depends` 把 `oauth2_scheme` 传入依赖项。

{* ../../docs_src/security/tutorial001.py hl[10] *}

该依赖项使用字符串（`str`）接收*路径操作函数*的参数 `token` 。

**FastAPI** 使用依赖项在 OpenAPI 概图（及 API 文档）中定义**安全方案**。

      TestByteSink okSink = new TestByteSink();
      assertThrows(IOException.class, () -> failSource.copyTo(okSink));
      // ensure stream was closed IF it was opened (depends on implementation whether or not it's
      // opened at all if source.newInputStream() throws).
      assertTrue(
          "stream not closed when copying from source with option: " + option,

 *
 * @since 4.0.0
 */
@Experimental
@Immutable
public interface BuilderProblem {

    /**
     * Gets the hint about the source of the problem. While the syntax of this hint is unspecified and depends on the
     * creator of the problem, the general expectation is that the hint provides sufficient information to the user to

 * invoke methods, they invoke methods on the {@code ForwardingBlockingDeque}.
 *
 * <p>The {@code standard} methods are not guaranteed to be thread-safe, even when all of the
 * methods that they depend on are thread-safe.
 *
 * @author Emily Soldal
 * @since 21.0 (since 14.0 as {@link com.google.common.collect.ForwardingBlockingDeque})
 */
@J2ktIncompatible
@GwtIncompatible

Ela pode ser chamada como:

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

Então, pode ser usada com `Depends`.

### Use-o { #use-it }

Agora você pode passar esse `oauth2_scheme` em uma dependência com `Depends`.

{* ../../docs_src/security/tutorial001_an_py39.py hl[12] *}

Podría ser llamada como:

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

Así que, puede usarse con `Depends`.

### Úsalo { #use-it }

Ahora puedes pasar ese `oauth2_scheme` en una dependencia con `Depends`.

{* ../../docs_src/security/tutorial001_an_py39.py hl[12] *}

 * invoke methods, they invoke methods on the {@code ForwardingSet}.
 *
 * <p>The {@code standard} methods are not guaranteed to be thread-safe, even when all of the
 * methods that they depend on are thread-safe.
 *
 * @author Kevin Bourrillion
 * @author Louis Wasserman
 * @since 2.0
 */
@GwtCompatible
public abstract class ForwardingSet<E extends @Nullable Object> extends ForwardingCollection<E>

   * of their elements."
   *
   * </blockquote>
   */
  RESTRICTS_ELEMENTS,

  /**
   * Indicates that a collection has a well-defined ordering of its elements. The ordering may
   * depend on the element values, such as a {@link SortedSet}, or on the insertion ordering, such
   * as a {@link LinkedHashSet}. All list tests and sorted-collection tests automatically specify
   * this feature.
   */
  KNOWN_ORDER,

   * of their elements."
   *
   * </blockquote>
   */
  RESTRICTS_ELEMENTS,

  /**
   * Indicates that a collection has a well-defined ordering of its elements. The ordering may
   * depend on the element values, such as a {@link SortedSet}, or on the insertion ordering, such
   * as a {@link LinkedHashSet}. All list tests and sorted-collection tests automatically specify
   * this feature.
   */
  KNOWN_ORDER,